Cutoff Data
AI Funding Index
The numbers behind AI startup funding, calculated from every round we have logged and sourced. Free to cite.
Last reading 10/25/2026, 12:00:00 AM UTC
Across 445 AI funding rounds tracked, 363 disclosed a combined $43.66B. The median disclosed round was $14.6M, and 69 rounds were $100M or more. AI drew the most capital ($12.24B). The most active investor was Fuel Ventures, with 2 deals.
Cite as: Cutoff Report AI Funding Index, cutoffreport.com/funding/stats, data to 2026-10-25.
By month
| Month | Rounds | Disclosed |
|---|---|---|
| 2026-10 | 406 | $28.84B |
| 2026-09 | 19 | $4.42B |
| 2026-08 | 20 | $10.39B |
Median round size by stage
| Stage | Rounds | Median | Total |
|---|---|---|---|
| Seed | 109 | $5.5M | $2.09B |
| Pre-seed | 43 | $2.7M | $154.6M |
| Series A | 37 | $18.5M | $871.7M |
| Series B | 31 | $60.0M | $2.07B |
| Series C | 14 | $200.0M | $2.32B |
| Series D | 8 | $140.0M | $1.32B |
| Series E | 5 | $237.0M | $2.18B |
| Pre-Series A | 5 | $4.0M | $8.1M |
| Bridge | 3 | — | — |
| Series A Extension | 2 | $18.4M | $18.4M |
Seed is the most common round type in the dataset.
Sectors by capital raised
| Sector | Rounds | Disclosed |
|---|---|---|
| AI | 134 | $12.24B |
| semiconductors | 2 | $3.51B |
| Semiconductors | 12 | $3.28B |
| data center | 1 | $3.00B |
| AI infrastructure | 9 | $2.08B |
| Defense tech | 1 | $1.37B |
| Health | 27 | $1.08B |
| Optical networking | 1 | $900.0M |
| Climate & energy | 13 | $850.8M |
| Legal tech | 4 | $781.6M |
| energy storage | 1 | $750.0M |
| chip | 2 | $712.0M |
Most active AI investors
How this is measured
Calculated from the rounds in the AI funding tracker. Fund closes are excluded; undisclosed amounts count as rounds but not toward totals or medians. Nothing is estimated.
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