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US AI Infrastructure startup funding
US AI Infrastructure startups raised $37B across 164 funding rounds at 148 companies in the 12 months to Nov 14, 2026, against $34.5B across 147 rounds in the 12 months before (+7% in capital, +12% in rounds).
Companies headquartered in the United States, all funding stages, by announcement date. Data as of Nov 15, 2026; the last 12 months run Nov 15, 2025 – Nov 14, 2026. Capital counts disclosed amounts only (152 of 164 rounds in the last 12 months).
How much did US AI Infrastructure startups raise in the last 12 months?
| Last 12 months | 12 months before | Change | |
|---|---|---|---|
| Capital raised (disclosed) | $37B | $34.5B | +7% |
| Rounds | 164 | 147 | +12% |
| Companies funded | 148 | 135 | +10% |
How much have US AI Infrastructure startups raised in 2026?
In 2026 through Nov 14, 2026, US AI Infrastructure startups raised $29.8B across 151 rounds, against $23.2B across 132 rounds in the same period of 2025.
Which US AI Infrastructure startups raised the most?
Databricks raised the most in the last 12 months, 27% of the capital; the three largest companies together took 44%.
| Company | City | Capital raised | Rounds | Latest round |
|---|---|---|---|---|
| Databricks | San Francisco | $10B | 2 | Stage not stated · Aug 2026 |
| Crusoe | — | $3.9B | 1 | Series F+ · Sep 2026 |
| Fluidstack | New York City | $2.3B | 2 | Stage not stated · Sep 2026 |
| Baseten | San Francisco | $1.8B | 2 | Series F+ · Jun 2026 |
| Fireworks AI | Redwood City | $1.5B | 1 | Series D · Jul 2026 |
| Lambda | San Jose | $1.5B | 1 | Series E · Nov 2025 |
| fal | San Francisco | $1.4B | 3 | Series E · Nov 2026 |
| Modal Labs | New York | $1.1B | 2 | Series D · Oct 2026 |
| River AI | Palo Alto | $1.1B | 1 | Series A · Aug 2026 |
| Groq | — | $1B | 2 | Series A · Aug 2026 |
Which AI Infrastructure sub-sectors are growing in the US?
GPU clouds added the most companies: 10 raised in the 12 months before and 18 in the last 12 months.
| Sub-sector | Companies funded (year before → last 12 months) | Rounds | Capital raised |
|---|---|---|---|
| Inference & model serving | 24 → 29 | 36 | $9.5B |
| Data infrastructure | 42 → 24 | 26 | $12.1B |
| GPU clouds | 10 → 18 | 21 | $9.7B |
| Power & cooling for AI data centers | 9 → 16 | 17 | $1.3B |
| Training data, labeling & evaluation data | 15 → 15 | 15 | $1.4B |
| Enterprise AI platforms, governance & security | 10 → 13 | 15 | $123M |
| Compute orchestration & GPU software | 5 → 11 | 11 | $105M |
| Training & fine-tuning platforms | 5 → 6 | 7 | $1.7B |
| Data-center networking | 4 → 4 | 4 | $251M |
| Cloud cost & operations | 7 → 4 | 4 | $64M |
8 companies are not yet tagged with a sub-sector (Other / unclear).
How large is a typical US AI Infrastructure round?
In the last 12 months, the median disclosed Seed round was $9M, Series A round was $40M, Series B round was $126M.
| Stage | Rounds | With a disclosed amount | Median disclosed round |
|---|---|---|---|
| Pre-Seed | 13 | 13 | $4M |
| Seed | 53 | 48 | $9M |
| Series A | 44 | 41 | $40M |
| Series B | 16 | 16 | $126M |
| Series C | 9 | 9 | — |
| Series D | 8 | 8 | — |
| Series E | 4 | 3 | — |
| Series F+ | 5 | 5 | — |
| Growth | 1 | 1 | — |
| Stage not stated | 11 | 8 | — |
Medians are shown where at least 10 amounts are disclosed.
US AI Infrastructure funding by quarter
| Quarter | Rounds | Capital raised |
|---|---|---|
| 2025 Q1 | 29 | $2.1B |
| 2025 Q2 | 38 | $15.7B |
| 2025 Q3 | 38 | $2.9B |
| 2025 Q4 | 40 | $9.8B |
| 2026 Q1 | 34 | $2B |
| 2026 Q2 | 46 | $6B |
| 2026 Q3 | 47 | $17.4B |
| 2026 Q4 (to date) | 24 | $4.4B |
Other US sectors: AI Models & Research · Robotics & Physical AI · Industry AI · Defense & Public Safety AI · AI Hardware & Chips · Healthcare & Life Sciences · Fintech AI · Enterprise & Vertical AI · AI Agents · AI Developer Tools · Cybersecurity AI · Consumer & Media AI.
Definitions are in the methodology. Report a missing or misreported deal from the link in the footer.