This selection of large California-based startup incubators and accelerators includes established venture capital firms and organizations focused on fostering technological innovation. Companies such as X, The Moonshot Factory invent breakthrough technologies, while 500 Global and Plug and Play are venture capital firms connecting startups with investors and corporations. Founder Institute provides structured accelerator programs. Google for Startups connects emerging companies with resources and expertise.
The headquarters of these organizations are predominantly clustered in the San Francisco Bay Area, with several located in Palo Alto, San Francisco, Mountain View, and Sunnyvale. This geographic concentration suggests a strong regional focus on startup development and investment. A significant number of these companies were founded between 2006 and 2012, indicating a period of growth in the California startup ecosystem.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
X, The Moonshot Factoryx.company
A moonshot factory inventing and launching breakthrough technologies to create a radically better world |
3,149 | |||
| 2 |
500 Global500.co
Global venture capital firm investing early in fast-growing technology companies worldwide, with a focus on unlocking long-term value and driving economic growth |
2,719 | |||
| 3 |
Founder Institutefi.co
Provides structured accelerator programs and global networks to help founders turn ideas into fundable startups and scale businesses globally. |
1,725 | |||
| 4 |
Plug and Playplugandplaytechcenter.com
global platform connecting startups, corporations, investors across multiple industries to foster innovation, investment, and collaboration worldwide. |
1,311 | |||
| 5 |
Google for Startupsstartup.google.com
Connecting startups with people, products, and best practices to help them grow, scale, and solve important challenges. |
1,141 | |||
| 6 |
ODFjoinodf.com
Helping aspiring entrepreneurs start successful startups by providing guidance, resources, and a supportive community through a program focused on the exploration stage of company building |
801 | |||
| 7 |
Berkeley SkyDeckskydeck.berkeley.edu
An official startup accelerator affiliated with UC Berkeley, providing consulting, resources, mentorship, and connections to help Cal entrepreneurs launch and grow transformative startups |
624 | |||
| 8 |
DFG Ventures
A Los Angeles venture studio incubating, investing in, operating, and consulting scalable food businesses for the future |
529 | |||
| 9 |
Gold Housegoldhouse.org
Gold House empowers and elevates Asian Pacific creators and companies through innovative programs and platforms, investing in, uniting, and promoting cultural change |
514 | |||
| 10 |
Technovationtechnovation.org
Empowers girls globally in tech education, fostering leadership and problem-solving through mobile app coding for real-world issues with mentor support. |
477 | |||
| 11 | 417 | ||||
| 12 |
StartXweb.startx.co
A community of entrepreneurs and experts focused on collaboration and impact, providing support and resources without taking equity |
390 | |||
| 13 | 389 | ||||
| 14 |
PeopleTech Partnerspeopletechpartners.com
Connects world-class People leaders with technology to scale solutions for forward-thinking companies, providing critical insights and feedback to founders to fuel success. |
345 | |||
| 15 |
A2SV | Africa to Silicon Valleya2sv.org
A nonprofit social enterprise upskilling young software engineers, connecting them to top tech internships, and guiding them to create digital solutions for Africa's challenges |
333 | |||
| 16 | 304 | ||||
| 17 |
Western Growerswga.com
Advocate for fruit, vegetable, and tree nut farmers by providing insurance, technology advancement, and regulatory support to ensure viability. |
295 | |||
| 18 |
Activateactivate.org
Activate empowers scientists through a fellowship program to launch startups addressing global challenges, ensuring their research is brought to market effectively |
284 | |||
| 19 |
Silicon Catalystsiliconcatalyst.com
Incubator specializing in semiconductor solutions, providing startups with resources, partnerships, funding, and guidance to accelerate their journey from idea to production |
216 | |||
| 20 |
Go Paladingopaladin.org
Non-profit organization supporting minority entrepreneurs in the tech industry by providing resources and connections to elevate their ideas |
185 | |||
| 21 |
Aximsoftaximsoft.com
A technology firm incubating startups, bringing ideas to life through innovative products and solutions, pushing the limits of what's possible |
141 | |||
| 22 |
Starburststarburst.aero
Support aerospace and defense innovation through accelerators, consulting, and investment, connecting startups with corporate and government partners globally. |
123 | |||
| 23 | 118 | ||||
| 24 |
Nobody Studiosnobodystudios.com
Curates ideas, accelerates startup creation, and builds successful companies with a focus on innovation, people, and crowdfunding engagement. |
102 | |||
| 25 |
Coeus Solutionscoeus-solutions.com
Specializing in web and mobile app development, Coeus Solutions offers customized solutions, virtual teams, and tech ventures for leading German brands |
92 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 | 92 | ||||
| 27 |
Shifamedshifamed.com
Specialized medtech innovation hub solving unmet needs through rapid execution, advanced technology, and collaboration to enhance clinical outcomes in healthcare |
86 | |||
| 28 |
500 Startups500.co
Venture capital firm investing in talented entrepreneurs globally, providing seed capital, accelerator programs, and support for startup growth and innovation ecosystems |
65 | |||
| 29 |
Portfolio Tportfoliot.com
A global technology venture studio focusing on creating disruptive solutions across various industries and spearheading cognitive technologies for positive impact |
62 | |||
| 30 |
The Hivehivedata.com
An AI fund and co-creation studio working with entrepreneurs and corporations to launch AI-based startups, focusing on enterprise and vertical industries Offices in Palo Alto, Sao Paolo, and Bangalore |
55 | |||
| 31 |
Postindustriapostindustria.com
Tech incubator developing new businesses and providing web/mobile development services Experienced team of 150+ engineers, project managers, and PhDs |
51 | |||
| 32 |
Platformplatformvc.ai
This company offers a platform for diverse founders to create innovative ventures solving global challenges |
46 | |||
| 33 |
i-GATE Innovation Hubigateihub.org
Regional incubator specializing in growing technology startups by providing industry networking events, education programs, infrastructure, and access to scientists, investors, and corporate partners |
40 | |||
| 34 | 33 | ||||
| 35 |
SVG Venturessvgventures.com
An investment, technology, and advisory firm based in Silicon Valley that partners with organizations for strategy, innovation, and global expansion |
32 | |||
| 36 |
Water, Energy and Technology (WET) Centerwetcenter.org
The company supports water, energy, and ag-tech innovators through training, coaching, networking, and fostering an inclusive environment for entrepreneurs and community members |
29 | |||
| 37 |
Arise Venturesariseventures.vc
A leading global early stage tech fund with a focus on women entrepreneurs, investing in diverse tech companies and helping them scale |
28 | |||
| 38 |
Initio Capitalinitiocapital.com
investment in early-stage companies, support through Venture Studio, community resources, accelerating growth, expanding access to strategic partners |
27 | |||
| 39 |
ZGC Capital Corporationzgccapital.com
A Silicon Valley-based company fostering technology entrepreneurship through venture capital investment, community building, and global innovation exchanges in top innovation hubs |
23 | |||
| 40 |
Launch Factorylaunchfactory.com
A San Diego, California-based startup studio provides founders with resources, seed capital, and an accelerator program to launch successful companies |
18 | |||
| 41 |
Berkeley Gateway Acceleratorfuturefrontier.vc
Early-stage venture capital firm investing in exceptional entrepreneurs with proprietary screening software and a network for early access to high-quality startups |
17 | |||
| 42 |
BRIIA® - The Intelligent Accelerator®briia.io
An accelerator program for tech startups, providing mentorship, resources, and community to help founders grow their companies quickly and efficiently |
16 | |||
| 43 |
Analytics Venturesanalyticsventures.com
A venture studio fund in San Diego focused on launching innovative ventures in Artificial Intelligence, partnering with entrepreneurs and researchers |
12 | |||
| 44 |
SKT Labsktlab.com
A global software product development company and incubator, focusing on building commercial grade software, launching products, fundraising, and global reach |
12 | |||
| 45 |
HealthLink at UC San Diegohealthlinkatucsd.webflow.io
A company bringing together entrepreneurs and professionals to advance healthcare technologies, ultimately enhancing patient care and empowering the future of healthcare technology |
12 | |||
| 46 |
Draper Goren Holmdrapergorenholm.com
Web3 venture studio and fund founded by Tim Draper, Alon Goren, and Josef Holm, focusing on incubating and accelerating early-stage startups globally Organizers of top blockchain conferences |
11 | |||
| 47 |
TNEpartnerstnepartners.kr
A global accelerator offering professional programs and a network to support startups in successfully launching products and securing funding |
8 | |||
| 48 |
HawkTowerhawktower.com
An emerging venture capital firm supporting entrepreneurs in underleveraged California, focusing on pre-seed and seed investments, and offering accelerator programs |
8 | |||
| 49 |
Quandexquandex.com
Technology incubator investing in early stage startups with a network of 400 IT professionals Offers expertise in product launch, development, and digital marketing strategies |
7 | |||
| 50 |
ActionSpot Startup Studiomyactionspot.com
A hybrid Product & Business Incubator focusing on Data Science, AI, Deep Learning, VR, and Cloud technologies, offering services to help startups develop and introduce new products to market quickly |
7 | |||
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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 Nov 12, 2026.
More company lists in California
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- Multinational companies in California 2,591
- SaaS companies in California 1,854
- Software Development companies in California 1,649
- AI companies in California 1,296
- Companies with in-house R&D in California 1,275
- Manufacturers in California 1,066
- Hardware manufacturers in California 985
- IT Services and IT Consulting companies in California 968
- Education providers in California 950
- Subscription businesses in California 939
- Venture capital and private equity firms in California 917
- Professional services firms in California 880
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- Retail chains in California 803
- IT services companies in California 796
- Venture Capital and Private Equity Principals companies in California 731
- Financial services firms in California 711
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- Healthcare providers in California 569
- AI-native companies in California 561
- Hospitals and Health Care companies in California 555
- Consulting firms in California 551
- Public sector organisations in California 535
The same list elsewhere in United States
- Startup incubators and accelerators in the United States 213
- Startup incubators and accelerators in New York State 37
- Startup incubators and accelerators in New York 29