# Top 99 companies with a mobile app in California

Tamtam tracks 827 companies with a mobile app headquartered in California. This list ranks the 99 largest by number of employees on LinkedIn, led by Google, Wells Fargo and The Walt Disney Company. Their median headcount is 9,929. Half of them were founded in 1999 or later. The most common headquarters are San Francisco (32), Los Angeles (6) and San Diego (5).

This selection of large companies with a mobile app in California includes major players in software development, entertainment, and financial services. Among them are Google, known for its search engine and web services; Apple, which designs consumer electronics like iPhones; The Walt Disney Company, an entertainment provider; and Wells Fargo, a diversified financial services company. Many of these companies are headquartered in the San Francisco Bay Area.

The companies listed are predominantly large, established enterprises. For instance, Uber operates a global platform for transportation and delivery services, while Kaiser Permanente is a large not-for-profit health plan. A notable pattern is the concentration of these large tech and financial firms in cities such as San Francisco, Mountain View, and Cupertino, reflecting California's role as a hub for these industries.

🇺🇸 California · 99 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Google](https://www.tamtam.ai/c/google) (google.com)<br>Provides a powerful search engine, web services, and advertising tools to help users find information and businesses reach customers | Software Development | 🇺🇸 Mountain View | 304,428 |  |
| 2 | [Wells Fargo](https://www.tamtam.ai/c/wells-fargo) (wellsfargo.com)<br>A diversified financial services company offering banking, investment, mortgage products, and more through numerous locations and digital platforms Serving customers globally | Financial Services | 🇺🇸 San Francisco | 234,570 |  |
| 3 | [The Walt Disney Company](https://www.tamtam.ai/c/the-walt-disney-company) (thewaltdisneycompany.com)<br>An entertainment company creating magical experiences through animated features, theme park attractions, sports coverage, and television shows for global audiences | Entertainment Providers | 🇺🇸 Burbank | 220,000 |  |
| 4 | [Apple](https://www.tamtam.ai/c/apple) (apple.com)<br>Designs and manufactures innovative consumer electronics, including iPhones, iPads, and Macs, known for their user-friendly interfaces and sleek design | Computers and Electronics Manufacturing | 🇺🇸 Cupertino | 184,384 | 1976 |
| 5 | [Meta](https://www.tamtam.ai/c/meta) (meta.com)<br>Focuses on creating social technology platforms, including virtual and augmented reality experiences, and operates popular apps like Facebook and Instagram to connect people globally | Software Development | 🇺🇸 Menlo Park | 164,418 |  |
| 6 | [Uber](https://www.tamtam.ai/c/uber-san-francisco) (uber.com)<br>Global platform powering flexible earnings and movement of people and things, constantly reimagining how to enable transportation and delivery services worldwide | Internet Marketplace Platforms | 🇺🇸 San Francisco | 160,913 |  |
| 7 | [HP](https://www.tamtam.ai/c/hp) (hp.com)<br>This company creates technology solutions aiming to inspire innovation and make extraordinary contributions to humanity through climate action, human rights, and digital equity | IT Services and IT Consulting | 🇺🇸 Palo Alto | 142,944 |  |
| 8 | [Kaiser Permanente](https://www.tamtam.ai/c/kaiser-permanente) (healthy.kaiserpermanente.org)<br>Leading not-for-profit health plan with a unique business model driving industry improvements, serving millions of members across multiple states and impacting communities positively | Hospitals and Health Care | 🇺🇸 Oakland | 137,397 | 1945 |
| 9 | [YouTube](https://www.tamtam.ai/c/youtube) (youtube.com)<br>Team-oriented, creative workplace within Google, developing and rolling out key features and products quickly Headquartered in San Bruno Opportunities globally | Technology, Information and Internet | 🇺🇸 San Bruno | 113,401 |  |
| 10 | [Chipotle Mexican Grill](https://www.tamtam.ai/c/chipotle-mexican-grill) (chipotle.com)<br>Serving responsibly sourced, classically cooked real food with wholesome ingredients, focusing on sustainability, digital innovation, and excellent guest experience. | Restaurants | 🇺🇸 Newport Beach | 105,000 | 1993 |
| 11 | [TikTok](https://www.tamtam.ai/c/tiktok) (tiktok.com)<br>A leading platform for short-form video, fostering creativity and innovation with a flat company structure and global presence for career growth opportunities | Entertainment Providers | 🇺🇸 Los Angeles | 91,370 |  |
| 12 | [Salesforce](https://www.tamtam.ai/c/salesforce) (salesforce.com)<br>It provides customer relationship management solutions, integrating data, artificial intelligence, and a focus on trust to enhance customer experiences. | Software Development | 🇺🇸 San Francisco | 86,347 |  |
| 13 | [Taco Bell](https://www.tamtam.ai/c/taco-bell) (tacobell.com)<br>This company operates as a global Mexican-inspired quick service restaurant brand, with thousands of locations serving millions of customers weekly, part of a major restaurant group. | Restaurants | 🇺🇸 Irvine | 83,421 | 1962 |
| 14 | [DoorDash](https://www.tamtam.ai/c/doordash) (careersatdoordash.com)<br>A tech and logistics company focused on empowering local economies through delivery services, with a mission to expand beyond food delivery | Software Development | 🇺🇸 San Francisco | 80,754 |  |
| 15 | [Airbnb](https://www.tamtam.ai/c/airbnb) (airbnb.com)<br>The company offers unique stays and experiences worldwide through a platform connecting hosts with guests, fostering community connections | Software Development | 🇺🇸 San Francisco | 72,938 | 2007 |
| 16 | [NVIDIA](https://www.tamtam.ai/c/nvidia) (nvidia.com)<br>A pioneering company in accelerated computing, known for inventing the GPU, shaping PC gaming, computer graphics, AI development, and creating the metaverse | Computer Hardware Manufacturing | 🇺🇸 Santa Clara | 48,336 | 1993 |
| 17 | [Farmers Insurance](https://www.tamtam.ai/c/farmers-insurance) (farmers.com)<br>Insurance provider offering vehicle, home, small business coverage, specialty insurance, financial services, personalized customer service, and community volunteerism. | Insurance | 🇺🇸 Woodland Hills | 46,814 | 1928 |
| 18 | [Adobe](https://www.tamtam.ai/c/adobe) (adobe.com)<br>It provides digital media and marketing solutions, enabling users to create and deliver engaging experiences for various audiences effectively. | Software Development | 🇺🇸 San Jose | 42,354 | 1982 |
| 19 | [Mattel, Inc.](https://www.tamtam.ai/c/mattel-inc) (mattel.com)<br>A purpose-driven company creating innovative products and experiences to inspire, entertain, and develop children through play, with iconic brands and global presence | Manufacturing | 🇺🇸 El Segundo | 37,000 | 1945 |
| 20 | [Lyft](https://www.tamtam.ai/c/lyft) (lyft.com)<br>A transportation company focused on improving lives and cities through ridesharing, bikeshare, and public transit partnerships, while offsetting carbon emissions | Ground Passenger Transportation | 🇺🇸 San Francisco | 28,273 | 2012 |
| 21 | [eBay](https://www.tamtam.ai/c/ebay) (ebay.com)<br>This company creates pathways to connect millions of sellers and buyers globally, empowering customers to grow and thrive with innovative technology | Technology, Information and Internet | 🇺🇸 San Jose | 27,000 |  |
| 22 | [Experian](https://www.tamtam.ai/c/experian) (experianplc.com)<br>Global information services company empowering consumers and clients to manage data confidently, make smarter decisions, prevent fraud, and maximize opportunities worldwide | Information Services | 🇺🇸 Costa Mesa | 26,255 | 1980 |
| 23 | [Workday](https://www.tamtam.ai/c/workday) (workday.com)<br>Unifying human resources and finance on an AI-powered platform for high-impact outcomes through superintelligence, putting AI agents to work for people. | Software Development | 🇺🇸 Pleasanton | 25,233 | 2005 |
| 24 | [Live Nation Entertainment](https://www.tamtam.ai/c/live-nation-entertainment) (livenationentertainment.com)<br>Global leader in live events, ticketing, concerts, media, sponsorship, and artist services with comprehensive employee benefits and career opportunities. | Entertainment Providers | 🇺🇸 Beverly Hills | 24,885 | 2005 |
| 25 | [Instacart](https://www.tamtam.ai/c/instacart) (instacart.com)<br>A leading grocery technology company facilitating online shopping, pickup, and delivery services from thousands of stores in North America | Software Development | 🇺🇸 San Francisco | 24,819 |  |
| 26 | [Electronic Arts (EA)](https://www.tamtam.ai/c/electronic-arts-ea) (ea.com)<br>Develops and publishes interactive entertainment and video games, fostering a global community with creativity and player engagement. | Entertainment Providers | 🇺🇸 Redwood City | 23,703 |  |
| 27 | [LinkedIn](https://www.tamtam.ai/c/linkedin) (careers.linkedin.com)<br>It connects professionals globally, offering services like Talent Solutions, Marketing Solutions, Sales Solutions, and Premium Subscriptions for productivity and success. | Software Development | 🇺🇸 Sunnyvale | 23,635 |  |
| 28 | [UC San Diego](https://www.tamtam.ai/c/uc-san-diego) (ucsd.edu)<br>A globally renowned research university fostering collaboration, driving discoveries, and equipping students to solve pressing global issues as changemakers | Higher Education | 🇺🇸 La Jolla | 22,205 |  |
| 29 | [SpaceX](https://www.tamtam.ai/c/spacex) (spacex.com)<br>A company specializing in designing, manufacturing, and launching advanced rockets and spacecraft with a goal of making life multiplanetary | Aviation and Aerospace Component Manufacturing | 🇺🇸 Hawthorne | 20,008 | 2002 |
| 30 | [Petco](https://www.tamtam.ai/c/petco) (petco.com)<br>Providing pet products, services, and support to help pets live healthy, happy lives for over 60 years. | Retail | 🇺🇸 San Diego | 19,892 | 1965 |
| 31 | [Forever 21](https://www.tamtam.ai/c/forever-21) (forever21.com)<br>A fashion industry leader focused on making the latest trends accessible, operating E-commerce and 450 US locations, with a strong brand DNA | Retail Apparel and Fashion | 🇺🇸 Los Angeles | 19,339 | 1984 |
| 32 | [Netflix](https://www.tamtam.ai/c/netflix) (netflix.com)<br>A global entertainment service offering a wide range of TV shows, movies, and games in multiple genres and languages for millions of paid members worldwide | Entertainment Providers | 🇺🇸 Los Gatos | 18,533 | 1997 |
| 33 | [Intuit](https://www.tamtam.ai/c/intuit) (intuit.com)<br>A global technology platform helping customers overcome financial challenges, providing solutions like TurboTax, QuickBooks, Credit Karma, and Mailchimp | Software Development | 🇺🇸 Mountain View | 18,222 | 1983 |
| 34 | [Levi Strauss & Co.](https://www.tamtam.ai/c/levi-strauss-and-co) (levistrauss.com)<br>designs and markets iconic denim jeans and apparel brands, emphasizing sustainability, innovation, and global self-expression through fashion. | Retail Apparel and Fashion | 🇺🇸 San Francisco | 17,743 | 1853 |
| 35 | [Skechers](https://www.tamtam.ai/c/skechers) (careers.skechers.com)<br>A global brand that creates stylish, comfortable, and innovative footwear, apparel, and accessories for men, women, and children at affordable prices | Retail | 🇺🇸 Manhattan Beach | 16,264 |  |
| 36 | [Williams-Sonoma, Inc.](https://www.tamtam.ai/c/williams-sonoma-inc) (williams-sonomainc.com)<br>Specialty retailer offering high-quality kitchenware, furniture, and home decor through brands like Pottery Barn and West Elm across global multi-channel retail platforms. | Retail | 🇺🇸 San Francisco | 15,546 |  |
| 37 | [Autodesk](https://www.tamtam.ai/c/autodesk) (autodesk.com)<br>It provides software for architecture, engineering, construction, and media, enabling users to design, collaborate, and solve various challenges effectively. | Software Development | 🇺🇸 San Francisco | 15,378 | 1982 |
| 38 | [DIRECTV](https://www.tamtam.ai/c/directv) (directv.com)<br>Provides high-quality television content and personalized video services across multiple screens, utilizing emerging technologies to deliver reliable entertainment for passionate superfans everywhere. | Entertainment Providers | 🇺🇸 El Segundo | 15,343 | 1994 |
| 39 | [Stanford Health Care](https://www.tamtam.ai/c/stanford-health-care) (stanfordhealthcare.org)<br>Providing advanced, coordinated care in multiple specialties including cancer, neurosciences, cardiovascular, surgery, and organ transplant with innovative research and compassionate treatment. | Hospitals and Health Care | 🇺🇸 Palo Alto | 15,318 | 1885 |
| 40 | [Twitch](https://www.tamtam.ai/c/twitch) (twitch.tv)<br>A platform where diverse communities gather daily to support streamers, play beloved games, and connect with one another | Software Development | 🇺🇸 San Francisco | 14,817 | 2011 |
| 41 | [Pinterest](https://www.tamtam.ai/c/pinterest) (pinterest.com)<br>It is a visual inspiration platform with 482 million monthly active users, helping people search, save, and shop ideas. | Software Development | 🇺🇸 San Francisco | 13,766 | 2010 |
| 42 | [Sony Interactive Entertainment](https://www.tamtam.ai/c/sony-interactive-entertainment) (sonyinteractive.com)<br>A global leader in entertainment and innovation, delivering cutting-edge hardware, network services, and award-winning games through the PlayStation line of products | Entertainment Providers | 🇺🇸 San Mateo | 13,000 |  |
| 43 | [Remote](https://www.tamtam.ai/c/remote-san-francisco) (remote.com)<br>Comprehensive HR and payroll platform enabling companies to hire, manage, and pay employees worldwide with compliance and local expertise. | Human Resources Services | 🇺🇸 San Francisco | 12,042 | 2019 |
| 44 | [Block](https://www.tamtam.ai/c/block-oakland) (block.xyz)<br>Block is a company dedicated to economic empowerment, with diverse teams providing support in areas such as people, finance, legal, and security | Financial Services | 🇺🇸 Oakland | 12,038 |  |
| 45 | [Rivian](https://www.tamtam.ai/c/rivian) (careers.rivian.com)<br>Innovative team dedicated to challenging conventional thinking and seeking new solutions to protect the outdoors for future generations | Motor Vehicle Manufacturing | 🇺🇸 Irvine | 11,979 | 2009 |
| 46 | [inDrive](https://www.tamtam.ai/c/indrive) (indrive.com)<br>Global mobility platform offering urban services including ride-hailing, intercity transport, and delivery, challenging injustice through fair choices for communities. | IT Services and IT Consulting | 🇺🇸 Mountain View | 11,723 | 2013 |
| 47 | [Sharp HealthCare](https://www.tamtam.ai/c/sharp-healthcare) (careers.sharp.com)<br>Not-for-profit healthcare system offering acute, specialty hospitals, medical groups, and health plan with advanced, compassionate patient care services. | Hospitals and Health Care | 🇺🇸 San Diego | 11,594 | 1946 |
| 48 | [UC San Diego Health](https://www.tamtam.ai/c/uc-san-diego-health) (employment.ucsd.edu)<br>A leading academic health system in San Diego region, offering outstanding patient care, cutting-edge research, medical education, and community health programs | Hospitals and Health Care | 🇺🇸 San Diego | 10,962 | 1966 |
| 49 | [Roblox](https://www.tamtam.ai/c/roblox) (careers.roblox.com)<br>A platform where millions of creators build immersive virtual experiences for people to connect, learn, work, play, and socialize together | Software Development | 🇺🇸 San Mateo | 9,978 | 2004 |
| 50 | [Medium](https://www.tamtam.ai/c/medium) (job-boards.greenhouse.io)<br>It is a storytelling platform that values great writing, empowers readers, and operates on a subscription model without relying on ads. | Internet Publishing | 🇺🇸 San Francisco | 9,929 | 2012 |
| 51 | [Handshake](https://www.tamtam.ai/c/handshake) (joinhandshake.com)<br>career platform connecting Gen Z students, alumni, employers, and educators to facilitate job discovery and workforce building. | Software Development | 🇺🇸 San Francisco | 9,901 | 2014 |
| 52 | [UC Davis Health](https://www.tamtam.ai/c/uc-davis-health) (health.ucdavis.edu)<br>Academic health system with top medical school, hospital, research centers, nursing school, and community partnerships advancing patient care and health innovation. | Hospitals and Health Care | 🇺🇸 Sacramento | 9,647 | 1968 |
| 53 | [LanguageLine Solutions](https://www.tamtam.ai/c/languageline-solutions) (languageline.com)<br>A leading language solutions company providing interpretation, translation, and localization services in over 240 languages, including American Sign Language | Translation and Localization | 🇺🇸 Monterey | 9,331 | 1982 |
| 54 | [Udemy](https://www.tamtam.ai/c/udemy) (udemy.com)<br>The company provides a global marketplace platform for skill development, offering tools for learners, instructors, and enterprises to reach their full potential | E-Learning Providers | 🇺🇸 San Francisco | 9,288 | 2010 |
| 55 | [OpenAI](https://www.tamtam.ai/c/openai) (openai.com)<br>An AI research and deployment company focused on creating safe and beneficial general-purpose artificial intelligence for the benefit of humanity | Research Services | 🇺🇸 San Francisco | 9,268 | 2015 |
| 56 | [Resmed](https://www.tamtam.ai/c/resmed) (resmed.com.br)<br>The company pioneers innovative medical devices and software platforms to treat chronic diseases, improve quality of life, and reduce healthcare costs globally | Medical Equipment Manufacturing | 🇺🇸 San Diego | 9,180 | 1989 |
| 57 | [Dexcom](https://www.tamtam.ai/c/dexcom) (dexcom.com)<br>A leader in continuous glucose monitoring technology, empowering individuals with diabetes to control their health and pursue their dreams | Medical Equipment Manufacturing | 🇺🇸 San Diego | 8,997 | 1999 |
| 58 | [24 Hour Fitness](https://www.tamtam.ai/c/24-hour-fitness) (careers.24hourfitness.com)<br>A leading fitness company with over 35 years of experience, providing a wide range of equipment, classes, and digital offerings for members' well-being | Wellness and Fitness Services | 🇺🇸 Carlsbad | 8,899 | 1983 |
| 59 | [BJ's Restaurants, Inc.](https://www.tamtam.ai/c/bj-s-restaurants-inc) (bjsrestaurants.com)<br>A company offering a unique dining experience with award-winning handcrafted beer, Chicago-style pizza with a Southern California twist, and world-renowned desserts | Restaurants | 🇺🇸 Huntington Beach | 8,709 | 1978 |
| 60 | [TP-Link](https://www.tamtam.ai/c/tp-link) (tp-link.com)<br>Global provider of reliable networking devices and smart home products, enhancing connectivity and serving customers in over 170 countries. | Computers and Electronics Manufacturing | 🇺🇸 Irvine | 8,604 |  |
| 61 | [Docusign](https://www.tamtam.ai/c/docusign) (docusign.com)<br>It provides e-signature and contract lifecycle management solutions, helping businesses streamline agreement processes and unlock valuable data trapped in documents. | Software Development | 🇺🇸 San Francisco | 8,490 | 2003 |
| 62 | [Snap](https://www.tamtam.ai/c/snap-inc) (careers.snap.com)<br>Develops a mobile application for sending text and photo messages. Users can capture and share photos and videos with others instantly through the platform. | IT Services and IT Consulting | 🇺🇸 Santa Monica | 7,859 | 2011 |
| 63 | [Union Bank](https://www.tamtam.ai/c/union-bank)<br>The company provides financial services and has recently rebranded as US Bank Follow them for updates and information | Banking | 🇺🇸 San Francisco | 8,242 |  |
| 64 | [Farmers Insurance Group of Companies](https://www.tamtam.ai/c/farmers-insurance-group-of-companies) (farmers.com)<br>One of the largest insurers in the US offering vehicle, home, and small business insurance along with financial services through agents and employees nationwide | Insurance | 🇺🇸 Los Angeles | 8,121 | 1928 |
| 65 | [Riot Games](https://www.tamtam.ai/c/riot-games) (riotgames.com)<br>Develops and publishes popular video games, supports esports growth, and expands into entertainment, focusing on player community engagement worldwide. | Computer Games | 🇺🇸 Los Angeles | 8,095 | 2006 |
| 66 | [Blue Shield of California](https://www.tamtam.ai/c/blue-shield-of-california) (blueshieldca.com)<br>Nonprofit health plan offering medical, dental, vision, Medicaid, and Medicare services to nearly six million members in California. | Insurance | 🇺🇸 Oakland | 7,973 | 1939 |
| 67 | [Grocery Outlet](https://www.tamtam.ai/c/grocery-outlet) (groceryoutlet.com)<br>Leading extreme value retailer with over 440 independently operated stores in 10 states, offering brand name products at 40-60% savings, with a 100% satisfaction guarantee | Retail | 🇺🇸 Emeryville | 7,963 | 1946 |
| 68 | [Banana Republic](https://www.tamtam.ai/c/banana-republic) (bananarepublic.gap.com)<br>Global fashion brand offering modern apparel, accessories, and fragrances crafted from premium materials through hundreds of retail locations and community outreach programs. | Retail | 🇺🇸 San Francisco | 7,851 |  |
| 69 | [Rippling](https://www.tamtam.ai/c/rippling) (rippling.com)<br>Workforce management system streamlining business operations by consolidating data and applications for payroll, IT, expenses, and more into one unified platform | Software Development | 🇺🇸 San Francisco | 7,811 | 2016 |
| 70 | [Lucid Motors](https://www.tamtam.ai/c/lucid-motors) (lucidmotors.com)<br>Innovative, luxury EV company focused on sustainability, efficiency, and design, offering a new generation of electric vehicles | Motor Vehicle Manufacturing | 🇺🇸 Newark | 7,701 | 2016 |
| 71 | [Esri](https://www.tamtam.ai/c/esri) (esri.com)<br>Global leader in GIS software, location intelligence, and mapping, providing geospatial analytics and problem-solving solutions through The Science of Where | Software Development | 🇺🇸 Redlands | 7,361 | 1969 |
| 72 | [AAA Auto Club Enterprises](https://www.tamtam.ai/c/aaa-auto-club-enterprises) (careers.ace.aaa.com)<br>Operating motor clubs, providing roadside assistance, offering member benefits, and ensuring peace of mind for motorists across 21 states through dedicated employees and services. | Insurance | 🇺🇸 Costa Mesa | 7,030 |  |
| 73 | [Yelp](https://www.tamtam.ai/c/yelp) (yelp.com)<br>Platform connecting people with local businesses through millions of user-generated reviews covering restaurants, shops, services, and more. | Software Development | 🇺🇸 San Francisco | 6,910 | 2004 |
| 74 | [City National Bank](https://www.tamtam.ai/c/city-national-bank-los-angeles) (newsroom.cnb.com)<br>Personalized banking, investment, and trust services across select U.S. markets, managing substantial client assets and supporting community nonprofits. | Banking | 🇺🇸 Los Angeles | 6,817 | 1954 |
| 75 | [Ticketmaster](https://www.tamtam.ai/c/ticketmaster) (ticketmaster.com)<br>A global leader in professional ticketing solutions, providing fair access to live entertainment with innovative technology and support for artists, teams, and venues worldwide | Entertainment Providers | 🇺🇸 Beverly Hills | 6,810 | 1976 |
| 76 | [SoFi](https://www.tamtam.ai/c/sofi) (sofi.com)<br>Values-driven company providing modern financial products & services to help members borrow, save, spend, invest, and protect their money for financial independence | Financial Services | 🇺🇸 San Francisco | 6,754 | 2011 |
| 77 | [RingCentral](https://www.tamtam.ai/c/ringcentral) (ringcentral.com)<br>It provides AI-driven cloud business communications, contact center, video, and hybrid event solutions to enhance customer and employee interactions. | Software Development | 🇺🇸 Belmont | 6,731 | 1999 |
| 78 | [Coursera](https://www.tamtam.ai/c/coursera) (coursera.org)<br>Provides universal access to world-class online learning through partnerships with universities and industries, offering courses, certificates, and degrees to individuals and institutions. | E-Learning Providers | 🇺🇸 Mountain View | 6,516 | 2012 |
| 79 | [GitHub](https://www.tamtam.ai/c/github) (github.com)<br>It serves as a global platform for developers to collaborate, build, and deliver secure software using AI-powered tools and features. | Software Development | 🇺🇸 San Francisco | 6,506 | 2008 |
| 80 | [Notion](https://www.tamtam.ai/c/notion) (notion.com)<br>Combines product roadmaps, company wikis, and meeting notes into a single customizable workspace allowing teams to build and modify their own software tools. | Software Development | 🇺🇸 San Francisco | 6,434 | 2016 |
| 81 | [Driver](https://www.tamtam.ai/c/driver-san-francisco) (driver.xyz)<br>A technology platform connecting cancer patients worldwide to treatment options and knowledge from leading cancer centers through a mobile app | Technology, Information and Internet | 🇺🇸 San Francisco | 6,395 | 2015 |
| 82 | [Square](https://www.tamtam.ai/c/square) (squareup.com)<br>It provides integrated software and financial services to help sellers manage sales, inventory, and cash flow across various channels. | Software Development | 🇺🇸 San Francisco | 6,380 | 2009 |
| 83 | [Motive](https://www.tamtam.ai/c/motive) (gomotive.com)<br>Provides integrated tools for managing drivers, vehicles, equipment, and fleet expenses to enhance safety, productivity, and profitability in physical operations. | Software Development | 🇺🇸 San Francisco | 6,290 | 2013 |
| 84 | [PADI](https://www.tamtam.ai/c/padi) (padi.com)<br>Global organization offering scuba diving courses, certifications, and environmental conservation initiatives to empower individuals to explore and protect the ocean | Spectator Sports | 🇺🇸 Rancho Santa Margarita | 6,078 | 1966 |
| 85 | [loanDepot](https://www.tamtam.ai/c/loandepot) (loandepot.com)<br>A digital commerce company revolutionizing the mortgage industry, offering lending and real estate services to simplify home ownership | Financial Services | 🇺🇸 Irvine | 5,727 | 2010 |
| 86 | [DoorDash Driver App](https://www.tamtam.ai/c/doordash-driver-app) (bit.ly)<br>Connecting people with opportunities to earn and empowering local businesses and drivers to thrive through a flexible and simple delivery platform | Technology, Information and Internet | 🇺🇸 San Francisco | 5,688 | 2012 |
| 87 | [Samsara](https://www.tamtam.ai/c/samsara) (samsara.com)<br>A pioneer in Connected Operations™ Cloud, leveraging IoT data for actionable insights to improve operations in various industries worldwide | Software Development | 🇺🇸 San Francisco | 5,639 | 2015 |
| 88 | [Mitsubishi Motors](https://www.tamtam.ai/c/mitsubishi-motors) (mitsubishicars.com)<br>Innovative team of dreamers, designers, and engineers challenge convention to create Mitsubishi vehicles with a relentless ambition for driving different | Motor Vehicle Manufacturing | 🇺🇸 Cypress | 5,586 | 1981 |
| 89 | [McAfee](https://www.tamtam.ai/c/mcafee) (mcafee.com)<br>This company is focused on creating innovative solutions for online protection, allowing people to enjoy a safe online experience with confidence | Computer and Network Security | 🇺🇸 San Jose | 5,555 |  |
| 90 | [freeCodeCamp](https://www.tamtam.ai/c/freecodecamp) (freecodecamp.org)<br>A global community offering free online coding courses, projects, and interview preparation for developer roles, with a focus on collaborative learning | E-Learning Providers | 🇺🇸 San Francisco | 5,520 | 2014 |
| 91 | [WhatsApp](https://www.tamtam.ai/c/whatsapp) (whatsapp.com)<br>It provides a reliable messaging service for over 1.5 billion users globally, enabling communication and sharing across various devices and locations. | Software Development | 🇺🇸 Menlo Park | 5,294 |  |
| 92 | [Stanford Medicine Children's Health](https://www.tamtam.ai/c/stanford-medicine-children-s-health) (stanfordchildrens.org)<br>Largest Bay Area pediatric and obstetric health system providing comprehensive clinical services, including rare condition treatments and well-child care. | Hospitals and Health Care | 🇺🇸 Palo Alto | 5,172 |  |
| 93 | [Del Taco](https://www.tamtam.ai/c/del-taco) (deltaco.com)<br>Established in 1964, this California-based company operates nearly 600 restaurants across 16 states offering Mexican and American made-to-order items using fresh ingredients | Restaurants | 🇺🇸 Lake Forest | 5,131 | 1964 |
| 94 | [Keck Medicine of USC](https://www.tamtam.ai/c/keck-medicine-of-usc) (keckmedicine.org)<br>Leading medical enterprise in Southern California, providing specialized care with world-class research, top-ranked hospitals, and over 100 clinics in the region | Hospitals and Health Care | 🇺🇸 Los Angeles | 5,099 | 1991 |
| 95 | [Robinhood](https://www.tamtam.ai/c/robinhood) (robinhood.com)<br>This company aims to make financial markets accessible to all by offering intuitive and affordable trading options, empowering everyone to participate | Financial Services | 🇺🇸 Menlo Park | 4,834 | 2013 |
| 96 | [Procore Technologies](https://www.tamtam.ai/c/procore-technologies) (procore.com)<br>Technology platform providing AI-driven project planning, collaboration, and risk mitigation solutions for construction projects of all sizes worldwide. | Software Development | 🇺🇸 Carpinteria | 4,793 |  |
| 97 | [The Beachbody Company](https://www.tamtam.ai/c/the-beachbody-company) (bodi.com)<br>A leading digital fitness, nutrition, and mindset subscription company focused on promoting Health Esteem through innovative content, supplements, and support | Wellness and Fitness Services | 🇺🇸 El Segundo | 4,739 | 1998 |
| 98 | [Zoox](https://www.tamtam.ai/c/zoox) (zoox.com)<br>Development of fully autonomous, purpose-built vehicle fleet designed for AI-driven mobility services, enhancing human transportation experience. | Motor Vehicle Manufacturing | 🇺🇸 Foster City | 4,712 | 2014 |
| 99 | [Discord](https://www.tamtam.ai/c/discord) (discord.com)<br>A communication platform founded in 2015, connecting users through voice, video, and text in diverse communities without selling ads or user data | Software Development | 🇺🇸 San Francisco | 4,707 |  |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.

## More company lists in California

- [The largest companies in California](https://www.tamtam.ai/l/largest-companies-california) (15,265)
- [Multinational companies in California](https://www.tamtam.ai/l/multinational-companies-california) (2,592)
- [SaaS companies in California](https://www.tamtam.ai/l/saas-companies-california) (1,855)
- [Software Development companies in California](https://www.tamtam.ai/l/software-development-companies-california) (1,650)
- [AI companies in California](https://www.tamtam.ai/l/ai-companies-california) (1,297)
- [Companies with in-house R&D in California](https://www.tamtam.ai/l/r-and-d-companies-california) (1,276)
- [Manufacturers in California](https://www.tamtam.ai/l/manufacturers-california) (1,066)
- [Hardware manufacturers in California](https://www.tamtam.ai/l/hardware-companies-california) (985)
- [IT Services and IT Consulting companies in California](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-california) (968)
- [Education providers in California](https://www.tamtam.ai/l/education-companies-california-united-states) (950)
- [Subscription businesses in California](https://www.tamtam.ai/l/subscription-businesses-california) (940)
- [Venture capital and private equity firms in California](https://www.tamtam.ai/l/vc-and-private-equity-firms-california) (917)
- [Professional services firms in California](https://www.tamtam.ai/l/professional-services-firms-california) (880)
- [Retail chains in California](https://www.tamtam.ai/l/retail-chains-california) (803)
- [IT services companies in California](https://www.tamtam.ai/l/it-services-companies-california) (796)
- [Venture Capital and Private Equity Principals companies in California](https://www.tamtam.ai/l/venture-capital-and-private-equity-principals-companies-california) (731)
- [Financial services firms in California](https://www.tamtam.ai/l/financial-services-firms-california) (711)
- [Financial Services companies in California](https://www.tamtam.ai/l/financial-services-companies-california) (642)
- [Healthcare providers in California](https://www.tamtam.ai/l/healthcare-providers-california) (569)
- [AI-native companies in California](https://www.tamtam.ai/l/ai-native-companies-california) (561)
- [Hospitals and Health Care companies in California](https://www.tamtam.ai/l/hospitals-and-health-care-companies-california) (555)
- [Consulting firms in California](https://www.tamtam.ai/l/consulting-firms-california) (551)
- [Public sector organisations in California](https://www.tamtam.ai/l/public-sector-organisations-california) (535)
- [Technology, Information and Internet companies in California](https://www.tamtam.ai/l/technology-information-and-internet-companies-california) (514)

## The same list elsewhere in United States

- [Companies with a mobile app in the United States](https://www.tamtam.ai/l/companies-with-mobile-app-united-states) (4,663)
- [Companies with a mobile app in New York State](https://www.tamtam.ai/l/companies-with-mobile-app-new-york-state) (491)
- [Companies with a mobile app in Texas](https://www.tamtam.ai/l/companies-with-mobile-app-texas) (366)
- [Companies with a mobile app in Florida](https://www.tamtam.ai/l/companies-with-mobile-app-florida) (284)
- [Companies with a mobile app in Illinois](https://www.tamtam.ai/l/companies-with-mobile-app-illinois) (178)
- [Companies with a mobile app in Massachusetts](https://www.tamtam.ai/l/companies-with-mobile-app-massachusetts) (159)
- [Companies with a mobile app in Alabama](https://www.tamtam.ai/l/companies-with-mobile-app-alabama) (156)
- [Companies with a mobile app in Pennsylvania](https://www.tamtam.ai/l/companies-with-mobile-app-pennsylvania) (130)
- [Companies with a mobile app in Washington State](https://www.tamtam.ai/l/companies-with-mobile-app-washington-state) (128)
- [Companies with a mobile app in Georgia](https://www.tamtam.ai/l/companies-with-mobile-app-georgia) (117)
- [Companies with a mobile app in Ohio](https://www.tamtam.ai/l/companies-with-mobile-app-ohio) (114)
- [Companies with a mobile app in New Jersey](https://www.tamtam.ai/l/companies-with-mobile-app-new-jersey) (113)
- [Companies with a mobile app in Colorado](https://www.tamtam.ai/l/companies-with-mobile-app-colorado) (100)
- [Companies with a mobile app in North Carolina](https://www.tamtam.ai/l/companies-with-mobile-app-north-carolina) (96)
- [Companies with a mobile app in Michigan](https://www.tamtam.ai/l/companies-with-mobile-app-michigan) (95)
- [Companies with a mobile app in Virginia](https://www.tamtam.ai/l/companies-with-mobile-app-virginia) (93)
- [Companies with a mobile app in Arizona](https://www.tamtam.ai/l/companies-with-mobile-app-arizona) (87)
- [Companies with a mobile app in Minnesota](https://www.tamtam.ai/l/companies-with-mobile-app-minnesota) (84)
- [Companies with a mobile app in Missouri](https://www.tamtam.ai/l/companies-with-mobile-app-missouri) (78)
- [Companies with a mobile app in Utah](https://www.tamtam.ai/l/companies-with-mobile-app-utah) (78)
- [Companies with a mobile app in New York](https://www.tamtam.ai/l/companies-with-mobile-app-new-york) (371)
- [Companies with a mobile app in San Francisco](https://www.tamtam.ai/l/companies-with-mobile-app-san-francisco) (238)
- [Companies with a mobile app in Los Angeles](https://www.tamtam.ai/l/companies-with-mobile-app-los-angeles) (81)
- [Companies with a mobile app in Chicago](https://www.tamtam.ai/l/companies-with-mobile-app-chicago) (75)

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Source: https://www.tamtam.ai/l/companies-with-mobile-app-california