MentionFox lists 146 AI infrastructure companies. Of them, 135 are Y Combinator companies (the newest batch here is Fall 2026, with 10); 10 filed a Form D notice with the SEC; 1 won an SBIR or STTR award.
By year
- 2026: 60 companies (49 Y Combinator, 10 Form D filers, 1 SBIR/STTR winner); median amount sold $9.2M across 10 Form D notices
- 2025: 29 companies (29 Y Combinator)
- 2024: 23 companies (23 Y Combinator)
AI infrastructure startups from other years
Companies from before 2020, or from a year with fewer than 15 of them. Every other year has its own full list, linked above.
| Company | What it does | Date | Amount | Round / stage | Record |
|---|---|---|---|---|---|
| Automorphic | Infuse knowledge into language models with just 10 samples | Summer 2023 | Y Combinator batch | Y Combinator listing | |
| Cedana | Fast, reliable, reproducible AI with GPU live migration | Summer 2023 | Y Combinator batch | Y Combinator listing | |
| Hegel AI | Open source tools for developing generative AI applications | Summer 2023 | Y Combinator batch | Y Combinator listing | |
| OpenPipe | Turn expensive prompts into cheap fine-tuned models | Summer 2023 | Y Combinator batch | Y Combinator listing | |
| Shadeform | The GPU Cloud Marketplace | Summer 2023 | Y Combinator batch | Y Combinator listing | |
| Trainy | Infrastructure for managing GPU clusters for training/serving. | Summer 2023 | Y Combinator batch | Y Combinator listing | |
| Decohere | Real-time generative AI | Winter 2023 | Y Combinator batch | Y Combinator listing | |
| Helicone | LLM Observability for Developers | Winter 2023 | Y Combinator batch | Y Combinator listing | |
| Middleware | AI-based full stack observability platform | Winter 2023 | Y Combinator batch | Y Combinator listing | |
| PoplarML | Deploy Machine Learning Models with One Command | Winter 2023 | Y Combinator batch | Y Combinator listing | |
| Artemis Search | A search technology that actually finds what you’re looking for. | Summer 2022 | Y Combinator batch | Y Combinator listing | |
| Beam | AI-Native Cloud Platform | Winter 2022 | Y Combinator batch | Y Combinator listing | |
| Cerebrium | Serverless Infrastructure Platform for AI | Winter 2022 | Y Combinator batch | Y Combinator listing | |
| JumpWire | Dynamic access controls for all data and databases | Winter 2022 | Y Combinator batch | Y Combinator listing | |
| LanceDB | Open-source, serverless vectordb for production-scale generative AI | Winter 2022 | Y Combinator batch | Y Combinator listing | |
| Lumina | AI+human powered automation on job-community platform with 1.5M… | Winter 2022 | Y Combinator batch | Y Combinator listing | |
| RedBrick AI | Rapid medical data annotation | Winter 2022 | Y Combinator batch | Y Combinator listing | |
| Sieve | The multimodal data lab | Winter 2022 | Y Combinator batch | Y Combinator listing | |
| Spade | Spade is the data and AI platform for modern finance. | Winter 2022 | Y Combinator batch | Y Combinator listing | |
| SubscriptionFlow | AI based Customizable Subscription & Revenue Management Platform | Winter 2022 | Y Combinator batch | Y Combinator listing | |
| Trébol | Your back-office, on autopilot | Winter 2022 | Y Combinator batch | Y Combinator listing | |
| Ferveret | Nuclear-inspired cooling that turns wasted power into more AI compute | Summer 2021 | Y Combinator batch | Y Combinator listing | |
| Hirebolt | AI engineering capacity | Summer 2021 | Y Combinator batch | Y Combinator listing | |
| Lightly | Help ML teams label the right data | Summer 2021 | Y Combinator batch | Y Combinator listing | |
| Openlayer | The fastest way to ship airtight AI | Summer 2021 | Y Combinator batch | Y Combinator listing | |
| Rootly | AI-native on-call and incident response carefully crafted to help… | Summer 2021 | Y Combinator batch | Y Combinator listing | |
| Zensors | AI to understand and automates the physical world | Summer 2021 | Y Combinator batch | Y Combinator listing | |
| Waydev | Engineering intelligence for AI transformation | Winter 2021 | Y Combinator batch | Y Combinator listing | |
| Humanloop | Humanloop is the LLM evals platform for enterprises | Summer 2020 | Y Combinator batch | Y Combinator listing | |
| Prolific | Making diverse, high-quality data easily available to anyone, anywhere | Summer 2019 | Y Combinator batch | Y Combinator listing | |
| Centaur | We Create Superior Data By Making Annotation Competitive | Winter 2019 | Y Combinator batch | Y Combinator listing | |
| Superb AI | Superb AI provides end-to-end computer vision MLOps platform | Winter 2019 | Y Combinator batch | Y Combinator listing | |
| Ultralight | Universal, Pure-GPU HTML Renderer | Winter 2019 | Y Combinator batch | Y Combinator listing | |
| Fountain | High volume hiring made simple | Summer 2015 | Y Combinator batch | Y Combinator listing |
Selling to these companies?
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Related startup lists
AI (135 shared) Developer tools (23 shared) Generative AI (14 shared) Cloud infrastructure (14 shared) AI agent (11 shared) Data and analytics (10 shared)
Figures come only from the record linked in each row; a blank means the record gives none. How these lists are built.