01A is a venture capital firm founded by former Twitter executives Dick Costolo and Adam Bain, investing in companies that have achieved product-market fit and are looking to scale. The firm provides capital and operational support, focusing on SaaS, AI, fintech, and cybersecurity at the Series A through C stages.
Deal activity increased 100% year-over-year (4 deals in the last 12 months). Average disclosed round size is $98.7M (across 35 rounds with reported amounts).
Portfolio
28
Fund Size
$395M
Top Stage
Series B
Last 12 Mo
3
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
36 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Sublime Security | Series C | $60M | Oct 2025 |
 Sublime Security | Series C | $150M | Oct 2025 |
 Micro1 | Series A | $35M | Sep 2025 |
 attio | Series B | $52M | Aug 2025 |
 BuildOps | Series C | $127M | Mar 2025 |
 Render | Series C | $80M | Jan 2025 |
 Nomad Homes | Series A | $20M | Oct 2023 |
 Capchase | Unknown | $400M | Jul 2022 |
 Postscript | Series C | $65M | Jun 2022 |
 Wheelhouse | Series A | $16M | Apr 2022 |
 Semsee | Series B | — | Feb 2022 |
 Autograph | Series B | $170M | Jan 2022 |
| PPapaya | Series B | $50M | Dec 2021 |
 Tipalti | Series F | $270M | Dec 2021 |
 Density | Series D | $125M | Nov 2021 |
 Electric AI | Series D | $90M | Oct 2021 |
 BrightHire | Series B | $20.5M | Oct 2021 |
| Nomad Homes | Series A | $20M | Sep 2021 |
 SpotOn | Series E | $300M | Sep 2021 |
 Saturn | Series B | $44M | Aug 2021 |
 Mythical Games | Series B | $75M | Jun 2021 |
| SpotOn | Series D | $125M | May 2021 |
 Explorium | Series C | $75M | May 2021 |
 MasterClass | Series F | $225M | May 2021 |
 Honeybook | Series D | $155M | May 2021 |
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Top Co-Investors
General Catalyst4 shared
Bessemer Venture Partners4 shared
Zeev Ventures4 shared
Kleiner Perkins3 shared
Slow Ventures3 shared
Institutional Venture Partners3 shared
Citi Ventures3 shared
Index Ventures3 shared
Georgian Partners3 shared
DST Global3 shared
Greylock Partners3 shared
New Enterprise Associates3 shared
GGV Capital3 shared
Founders Fund3 shared
Durable Capital Partners3 shared
Addition2 shared
Mubadala Investment Company2 shared
Franklin Templeton2 shared
Dragoneer Investment Group2 shared
Battery Ventures2 shared
Last updated: 7 September 2026