Startup accelerators in the United States: who backs its startups
184 accelerators back startups in the United States: they run there or hold at least two portfolio companies based there, 8,456 portfolio startups in all. The most active here are Y Combinator (3327), Techstars (1957) and 500 Global (568).
Accelerators by their portfolio companiesRebuilt 6 Nov 2026
accelerators
184
portfolio startups
8,456
of them raised in 12 months
30
Accelerators backing startups in the United States
| Accelerator | Startups here | Portfolio rounds, 12 mo | Latest activity |
|---|---|---|---|
 Y CombinatorAccelerator · United States · Orgo, chkit Docs, Superserve | 3,327 | 255 | Oct 2026 |
 TechstarsAccelerator · United States · FileMarket AI Data Labs, Certa.ai, Novo | 1,957 | 97 | Oct 2026 |
 500 GlobalAccelerator · United States · Reddit, Stripe, UpGuard | 568 | 35 | Oct 2026 |
 Plug and PlayAccelerator · United States · Amazon, PayPal, Google | 511 | 154 | Nov 2026 |
 AntlerAccelerator · Singapore · Coframe, CodeIntegrity, Fueled | 139 | 53 | Nov 2026 |
 SOSVAccelerator · United States · RadianX, Opal Therapeutics, Formlabs | 130 | 35 | Oct 2026 |
| 88VCAccelerator · Fragment, Anduril Industries, Palantir Technologies | 123 | 42 | Oct 2026 |
 EndeavorAccelerator · United States · Hilbert, Linq, ElevenLabs | 120 | 55 | Oct 2026 |
 Silicon Valley InvestclubAccelerator · Physical Intelligence, Epic Systems, Atoms | 98 | 45 | Oct 2026 |
 Craft VenturesAccelerator · United States · Air Space Intelligence, Uber, Sourcegraph | 90 | 22 | Oct 2026 |
 South Park CommonsAccelerator · United States · Google, Alchemy, Further AI | 83 | 21 | Oct 2026 |
 InterplayAccelerator · United States · SambaNova Systems, Anthropic, Databricks | 75 | 10 | Sep 2026 |
 MetapropAccelerator · United States · Airbnb, Autodesk, LawnStarter | 74 | 5 | Sep 2026 |
 AlleyCorpAccelerator · United States · Reddit, XO Health Inc., ShopMy | 72 | 16 | Sep 2026 |
 Elemental ImpactAccelerator · United States · Cambium, Swiftly, SPAN | 71 | 11 | Sep 2026 |
 Entrepreneurs Roundtable AcceleratorAccelerator · United States · Adobe, Rilla, Glia | 70 | 9 | Oct 2026 |
 avraAccelerator · Method Financial, LiveFlow, Infisical | 64 | 25 | Oct 2026 |
 M25Accelerator · United States · GHX, Ironclad, Chowly | 60 | 5 | Oct 2026 |
 Portland Seed FundAccelerator · United States · Autodesk, Customer.io, Esri | 58 | 5 | Sep 2026 |
 Hub71Accelerator · United Arab Emirates · Niahealth, Open Assets, Vesta / | 56 | 18 | Oct 2026 |
 Expert DojoAccelerator · United States · Gynisus, The Hemingway Report, Going | 50 | 2 | Jul 2026 |
 High AlphaAccelerator · United States · Tavus, Narvar, SurveyMonkey | 48 | 9 | Jul 2026 |
 Allied Venture PartnersAccelerator · Drafted, Palantir Technologies, Airbnb | 44 | 3 | Jul 2026 |
 Capital InnovatorsAccelerator · United States · Gainsight, CesiumAstro, NielsenIQ | 43 | 9 | Oct 2026 |
| Aa16z speedrunAccelerator · Verra, Hedra, Rosebud AI | 42 | 19 | Sep 2026 |
 Mucker CapitalAccelerator · United States · ServiceTitan, GovDash, Optro | 42 | 12 | Oct 2026 |
 SempervirensAccelerator · Superpower, CharacterQuilt, Collective | 42 | 7 | Sep 2026 |
 Samsung NextAccelerator · United States · CAST AI, Alchemy, Beacon Biosignals | 41 | 12 | Sep 2026 |
 Ballistic VenturesAccelerator · United States · Cresta, IBM, Dexterity | 39 | 11 | Oct 2026 |
 Radical PartnersAccelerator · Stripe, Amplify, Zillow | 36 | – | – |
 ExpaAccelerator · United States · Kit, BlueCargo, Omada Health | 35 | 9 | Oct 2026 |
 BIP VenturesAccelerator · United States · FinQuery, Cypress_io, Trella Health | 35 | 2 | Jul 2026 |
 Fuel AcceleratorAccelerator · Botco, Junction, Algoface | 34 | 2 | Sep 2026 |
 Entrepreneur FirstAccelerator · United Kingdom · Bazaarvoice, Asteroid, Finni Health | 32 | 58 | Oct 2026 |
 Primary Venture PartnersAccelerator · United States · Forge Point, K Health, AppViewX | 31 | 9 | Oct 2026 |
 Launch NYAccelerator · United States · BetterMynd, MemoryFox, Dimensional Energy | 31 | 4 | Jun 2026 |
 SixThirtyAccelerator · United States · AiPrise, KnowBe4, Sureify | 30 | 9 | Sep 2026 |
 Human VenturesAccelerator · United States · Box, Kingdom, Headspace | 28 | 5 | Sep 2026 |
 Rev1 VenturesAccelerator · United States · Paradigm Health, Matterport, Cape Analytics | 28 | 4 | Sep 2026 |
 Dreamit VenturesAccelerator · United States · IBM, EnsoData, Aurva | 28 | 3 | Aug 2026 |
The most backed startups in the United States
| Startup | Investors in this list |
|---|---|
 Replit | 7 |
 Google | 6 |
 Stripe | 5 |
 Verofax Limited | 5 |
 Amazon | 5 |
 HappyRobot | 5 |
 Luma | 5 |
 Microsoft | 5 |
 Fluidstack | 4 |
 Anduril Industries | 4 |
 SpaceX | 4 |
 Crusoe | 4 |
 Saronic Technologies | 4 |
 Flexport | 4 |
 Mastercard International Inc | 4 |
More on startups in the United States
Applying to an accelerator?
Tell us about your startup once: Alion matches it to the accelerators and funds that back companies like it in the United States.
Questions
Which accelerators back startups in the United States?
184 accelerators back startups in the United States: they run there or hold at least two portfolio companies based there, 8,456 portfolio startups in all. The most active here are Y Combinator (3327), Techstars (1957) and 500 Global (568).
How is this list built?
From what each accelerator holds: the portfolio page it publishes, the Y Combinator directory and the announced rounds that name it. An accelerator counts for United States when it runs there or at least two of its portfolio companies are based there; the list is rebuilt every night from 342 portfolios.
Source: investors' portfolio pages and announced rounds, 342 portfoliosUpdated 6 Nov 2026MethodologyJSONCC BY-SA 4.0