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The 53 largest venture-backed startups in San Francisco

Tamtam tracks 53 venture-backed startups headquartered in San Francisco. This list ranks all of them by number of employees on LinkedIn, led by Databricks, Pinterest and Remote. Their median headcount is 928. Half of them were founded in 2015 or later.

馃嚭馃嚫 San Francisco53 companiesUpdated Oct 9, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Databricksdatabricks.com

It provides a Data Intelligence Platform for organizations to manage their data effectively and leverage AI for better decision-making.

Software Development 馃嚭馃嚫 San Francisco 15,896 n/a
2
Pinterestpinterest.com

It is a visual inspiration platform with 482 million monthly active users, helping people search, save, and shop ideas.

Software Development 馃嚭馃嚫 San Francisco 13,766 2010
3
Remoteremote.com

Comprehensive HR and payroll platform enabling companies to hire, manage, and pay employees worldwide with compliance and local expertise.

Human Resources Services 馃嚭馃嚫 San Francisco 12,042 2019
4
Deeldeel.com

Platform offering HR tools, payroll, compliance, and mobility services to help companies manage and scale international workforces efficiently.

Human Resources Services 馃嚭馃嚫 San Francisco 9,873 2019
5
OpenAIopenai.com

An AI research and deployment company focused on creating safe and beneficial general-purpose artificial intelligence for the benefit of humanity

Research Services 馃嚭馃嚫 San Francisco 9,268 2015
6
Ripplingrippling.com

Workforce management system streamlining business operations by consolidating data and applications for payroll, IT, expenses, and more into one unified platform

Software Development 馃嚭馃嚫 San Francisco 7,811 2016
7
Notionnotion.com

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 馃嚭馃嚫 San Francisco 6,434 2016
8
Elasticelastic.co

This company specializes in Enterprise Search, Observability, and Security solutions to enhance customer and employee experiences, ensure smooth application performance, and protect against cyber threats

Software Development 馃嚭馃嚫 San Francisco 5,089 n/a
9
Gustogusto.com

A payroll and HR platform providing benefits, insurance, and support to streamline operations for over 300,000 businesses nationwide

Software Development 馃嚭馃嚫 San Francisco 4,450 2011
10
Samasama.com

A global leader in data annotation solutions for enterprise AI models, focusing on accuracy, scalability, and ethical practices to advance computer vision AI development

IT Services and IT Consulting 馃嚭馃嚫 San Francisco 4,350 2008
11
GitLababout.gitlab.com

DevOps platform revolutionizing software development collaboration, speeding up production processes, reducing costs, and increasing developer productivity for global remote team

IT Services and IT Consulting 馃嚭馃嚫 San Francisco 3,411 2014
12
Figmafigma.com

The company provides a platform for teams to collaborate in designing and constructing projects together

Design Services 馃嚭馃嚫 San Francisco 3,165 2012
13
Affirmaffirm.com

A technology-driven financial company offering transparent products to improve consumer lives, with a remote-first culture and offices in major cities

Financial Services 馃嚭馃嚫 San Francisco 3,110 2012
14
Gongvercel.app

Revenue intelligence platform centralizing customer data and automated workflows to provide business insights, helping professional sales teams optimize performance and increase wins.

Software Development 馃嚭馃嚫 San Francisco 2,592 2015
15
Miromiro.com

Visual workspace for innovation enabling distributed teams to collaborate, clarify ideas, center customer needs, and deliver products faster with top security and scalability

Software Development 馃嚭馃嚫 San Francisco 2,502 2011
16
HashiCorphashicorp.com

The company provides multi-cloud infrastructure automation products to help enterprises worldwide provision, secure, and run their critical applications in the cloud

Software Development 馃嚭馃嚫 San Francisco 2,245 2012
17
Brexbrex.com

AI-powered spend platform empowering finance teams to make smarter decisions with corporate cards, business accounts, global payments, and intuitive software for tracking expenses

Financial Services 馃嚭馃嚫 San Francisco 1,888 2017
18
Vantavanta.com

Automates compliance, manages risk, and proves trust for businesses through an AI-powered platform, offering tools for audits, vendor risk, and security questionnaires.

Software Development 馃嚭馃嚫 San Francisco 1,882 2018
19
iRhythm Technologies, Inc.irhythm.com

A digital health company using wearable biosensors and data analytics to detect, predict, and prevent disease, with a focus on patient care and innovation

Medical Equipment Manufacturing 馃嚭馃嚫 San Francisco 1,874 2006
20
Harnessharness.io

Provides a software delivery platform with modules for continuous integration, delivery, feature flags, cloud cost management, security, and AI-driven development.

Software Development 馃嚭馃嚫 San Francisco 1,722 2017
21
6sense6sense.com

Predicts potential buyers through AI, recommends engagement actions for anonymous buying teams, and provides tools to create, manage, and convert high-quality pipeline.

Software Development 馃嚭馃嚫 San Francisco 1,603 2013
22
Talkdesktalkdesk.com

Automates modern customer journeys using multi-agent AI orchestration and data unification to provide precise service, sales, and support across various specialized industries.

Software Development 馃嚭馃嚫 San Francisco 1,382 2011
23
PagerDutypagerduty.com

PagerDuty is a digital operations platform that helps companies respond to issues in real-time, improve operations, and collaborate effectively for success

Software Development 馃嚭馃嚫 San Francisco 1,266 2009
24
Intercomintercom.com

It offers an AI-first customer service platform with AI Agent, AI Copilot, and upcoming AI Analyst for improved efficiency.

Software Development 馃嚭馃嚫 San Francisco 1,188 2011
25
Amplitudeamplitude.com

The company assists businesses in maximizing the potential of their products through expertise, with resources available for support and employment opportunities

Software Development 馃嚭馃嚫 San Francisco 1,009 2012
26
Demandbasedemandbase.com

It provides a unified account-based go-to-market platform for B2B enterprises to identify, target, and engage the right customers effectively.

Software Development 馃嚭馃嚫 San Francisco 989 2005
27
Airtableairtable.com

No-code AI app platform building custom applications, automations, and agents to accelerate business operations, streamline workflows, and manage complex enterprise data across teams.

Software Development 馃嚭馃嚫 San Francisco 928 n/a
28
Mixpanelmixpanel.com

An event analytics platform providing real-time insights on customer behavior for informed decision-making, serving 8,000+ global customers across different industries

Software Development 馃嚭馃嚫 San Francisco 681 2009
29
Apollo.ioapollo.io

Go-to-market platform for finding prospects and engaging customers using an extensive B2B database with AI tools to drive efficient revenue growth.

Software Development 馃嚭馃嚫 San Francisco 603 2015
30
Enableenable.com

Platform enabling manufacturers, distributors, retailers to manage, analyze, and optimize rebate programs collaboratively for growth and compliance.

Software Development 馃嚭馃嚫 San Francisco 556 2016
31
SingleStoresinglestore.com

The company specializes in data processing, empowering users to transact, analyze, and contextualize data in real-time for building intelligent applications

Software Development 馃嚭馃嚫 San Francisco 554 2011
32
Frontfront.com

Provides a platform for customer service that enhances team collaboration, utilizes AI for efficiency, and delivers insights for improved customer experience.

Software Development 馃嚭馃嚫 San Francisco 550 n/a
33
Gorgiasgorgias.com

An ecommerce customer service platform with automation and AI capabilities, revolutionizing customer interactions through personalized support across multiple channels Serving 13,000+ merchants

Software Development 馃嚭馃嚫 San Francisco 524 2015
34
Nooksnooks.ai

It provides an AI Sales Assistant Platform that automates repetitive tasks, allowing sales representatives to concentrate on building relationships and increasing sales.

Software Development 馃嚭馃嚫 San Francisco 488 n/a
35
BVNKbvnk.com

Facilitate businesses integrating stablecoins into payment systems to accelerate and simplify global money movement efficiently and securely.

Financial Services 馃嚭馃嚫 San Francisco 453 2021
36
Allbirdsallbirds.com

A global footwear and apparel brand founded in New Zealand, focused on creating comfortable, sustainable products using premium natural materials

Retail Apparel and Fashion 馃嚭馃嚫 San Francisco 434 2016
37
Retoolretool.com

Providing a platform for developers to quickly build custom software and internal tools, abstracting tedious tasks for efficient application development.

Software Development 馃嚭馃嚫 San Francisco 414 2017
38
PolyAIpoly.ai

The company develops advanced conversational AI assistants that provide natural and effective customer service by understanding diverse language expressions

Software Development 馃嚭馃嚫 San Francisco 371 2017
39
Alchemyalchemy.com

Developer platform for building decentralized applications without managing blockchain infrastructure, used by top projects, with experienced engineers and A-list investors Hiring in engineering and go-to-market

Software Development 馃嚭馃嚫 San Francisco 356 n/a
40
Loft Orbitalloftorbital.com

Builds space infrastructure enabling any entity to use space. Develops a standardized, configurable satellite platform with turnkey hardware and software for customer missions.

Defense and Space Manufacturing 馃嚭馃嚫 San Francisco 355 2017
41
ujet.cxujet.cx

Leader in AI-powered contact center innovation, providing a future-proof cloud platform with cutting-edge AI for enhanced customer experiences and operational efficiency

Software Development 馃嚭馃嚫 San Francisco 337 2015
42
3Degrees Group, Inc.3degreesinc.com

This company helps businesses achieve renewable energy and decarbonization goals by providing sustainability consulting and environmental market solutions worldwide

Environmental Services 馃嚭馃嚫 San Francisco 292 2007
43
Riottryriot.com

The company creates a platform that helps organizations prepare their employees for cyberattacks in an engaging way to prevent human errors

Computer and Network Security 馃嚭馃嚫 San Francisco 243 2020
44
HappyRobothappyrobot.ai

AI workers automate communication tasks in logistics, handling freight operations, data extraction, and custom workflows for business efficiency.

Software Development 馃嚭馃嚫 San Francisco 161 2023
45
Amplemarketamplemarket.com

AI platform providing multichannel outreach, buying intent signals, and hyper-personalized messaging to help sales teams uncover opportunities and drive revenue growth effectively.

Software Development 馃嚭馃嚫 San Francisco 107 2019
46
LeadIQleadiq.com

It provides solutions for sellers and RevOps, focusing on pipeline generation, CRM enrichment, and utilizing AI for efficient workflows.

Software Development 馃嚭馃嚫 San Francisco 89 2015
47
Strapistrapi.io

The company provides an open-source Headless CMS based on NodeJS, offering customizable admin panels and API, self-hosting, and extensibility through plugins

Software Development 馃嚭馃嚫 San Francisco 85 2016
48
11x11x.ai

AI SDR, to automate sales and customer engagement tasks, especially outbound

Software Development 馃嚭馃嚫 San Francisco 83 2023
49
Escapeescape.tech

Automates the full offensive security lifecycle, discovering and validating modern application, API, and infrastructure exposures from code to cloud.

Computer and Network Security 馃嚭馃嚫 San Francisco 61 2020
50
Topo (YC W24)topo.io

AI SDR, sales development representatives, to automate outbound sales, enhancing lead generation and engagement for B2B companies

Software Development 馃嚭馃嚫 San Francisco 42 2023
51
Revenoidrevenoid.com

Provides AI-powered tools delivering tailored sales triggers, personalized messages, and multichannel outreach to improve sales engagement quality and efficiency.

Software Development 馃嚭馃嚫 San Francisco 34 2024
52
Leadbay (YC F25)leadbay.ai

AI model combining market data, company knowledge, and sales instincts to predict and identify future B2B customers accurately.

Technology, Information and Internet 馃嚭馃嚫 San Francisco 29 2023
53
Dialog AIaskdialog.com

Provide real-time assistance to guide customers through checkout, replicating the in-person shopping experience

Technology, Information and Internet 馃嚭馃嚫 San Francisco 21 2023

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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 Oct 9, 2026.

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