Companyon Ventures is a Boston-based venture capital firm that backs founder-led B2B software startups at the post-seed, pre-Series A stage. The firm invests in capital-efficient companies that have found early product-market fit and are ready to scale, providing hands-on support in fundraising, talent, and go-to-market strategy.
Average disclosed round size is $26.6M (across 36 rounds with reported amounts).
Portfolio
24
Fund Size
$41M
Top Stage
Series A
Last 12 Mo
3
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
38 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Sent | Series A | $12M | Jan 2026 |
 Posh | Series B | $37M | Jan 2026 |
 Flex | Series B | $60M | Dec 2025 |
| FFlexbase Technologies, Inc. | Series B | $60M | Dec 2025 |
 Flex | Series B | $60M | Dec 2025 |
 Daylit | Unknown | $110M | Sep 2025 |
 North.Cloud | Series A | $5M | Jun 2025 |
 NvisionX | Seed | $4.6M | Jan 2025 |
| Flex | Unknown | $25M | Jan 2025 |
| Sent | Seed | $3.5M | Jan 2025 |
 Cyvl AI | Seed | $6M | Mar 2024 |
 Fullcast | Series A | $34M | Jan 2024 |
 Fullcast | Seed | $34M | Jan 2024 |
| Flex | Series A | $120M | Sep 2023 |
| FFlexbase Technologies, Inc. | Unknown | $120M | Sep 2023 |
 ENDVR | Seed | $6M | Feb 2023 |
 Ziflow | Unknown | $16M | Feb 2023 |
| Ziflow | Series A | $20M | Feb 2023 |
| Ziflow | Series A | $16M | Jan 2023 |
 Allstacks | Series A | — | Oct 2022 |
 NVISIONx | Seed | $4.6M | Jan 2022 |
| NvisionX | Seed | $4.6M | Jan 2022 |
| FFullcast.io | Series A | $4M | Oct 2021 |
| Fullcast | Series A | $4M | Oct 2021 |
 Apty | Series A | $7.5M | Jul 2021 |
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Top Co-Investors
Florida Funders7 shared
Gaingels7 shared
MS&AD Ventures6 shared
CreativeCo Capital6 shared
Titanium Ventures5 shared
Riverside Acceleration Capital5 shared
Portage Ventures4 shared
Wellington Management4 shared
Crosslink Capital4 shared
SixThirty Ventures4 shared
Tusk Venture Partners3 shared
Gutbrain Ventures3 shared
Morgan Stanley Next Level Fund3 shared
PBJ Capital3 shared
Silicon Valley Bank3 shared
Home Depot Ventures2 shared
645 Ventures2 shared
Reformation Partners2 shared
Goodwater Capital2 shared
Dorm Room Fund2 shared
Last updated: 20 October 2026