Joint Effects is a closely-held venture capital firm based in the Boston area, founded in 2022. It focuses on financing and transforming businesses through emerging technologies, investing in fintech, deep tech, Web3, and health technology sectors.
Deal activity increased 100% year-over-year (2 deals in the last 12 months). Their most common stage is seed (46% of deals). Average disclosed round size is $12.8M (across 9 rounds with reported amounts).
Portfolio
11
Fund Size
—
Top Stage
Seed
Last 12 Mo
2
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
13 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Ever | Series A | $31M | Feb 2026 |
 Ever Cars Co. | Series A | $31M | Feb 2026 |
 Inven | Series A | — | May 2025 |
 Language I/O | Seed | $5M | Jul 2024 |
| Inven | Seed | — | Mar 2023 |
 Datanomix | Growth | $12M | Jan 2023 |
 iRestify | Unknown | $6M | Mar 2022 |
| LLanguage IO | Seed | $500K | Jan 2020 |
| Ever Cars Co. | Seed | $13.5M | — |
| TTrident Digital | Seed | $8M | — |
| BBook Salon | Seed | — | — |
| AAuthentic Vision | Series C | — | — |
| FFirelight | Unknown | $8M | — |
Top Co-Investors
Lifeline Ventures5 shared
Gutbrain Ventures4 shared
PBJ Capital4 shared
Maki.vc3 shared
Ibex Investors2 shared
JIMCO2 shared
Eclipse2 shared
Omega Funds2 shared
Bessemer Venture Partners1 shared
Raptor Group1 shared
Ventech1 shared
Vendep Capital1 shared
CEAS Investments1 shared
MK Capital1 shared
Hub Angels1 shared
Converge1 shared
Export Development Canada1 shared
Birchmere Ventures1 shared
Service Provider Capital1 shared
Alumni Ventures1 shared
Last updated: 7 October 2026