Joint Effects is a Boston-based venture capital firm primarily focused on driving digital transformation within essential services, fintech, deep tech, Web 3.0, and health technology sectors. Their strategy involves investing in companies that demonstrate a strong founder-market fit and have achieved over $1 million in annual recurring revenue, often through collaboration and co-investment with a network of other venture firms.
50% of their portfolio is in Manufacturing. Deal activity increased 100% year-over-year (2 deals in the last 12 months). Their most common stage is seed (50% of deals). Average disclosed round size is $12.2M (across 4 rounds with reported amounts).
Portfolio
4
Fund Size
—
Top Stage
Seed
Last 12 Mo
2
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
Portfolio
| Company | Round | Amount | Date |
|---|---|---|---|
 Ever | Series A | $31M | Feb 2026 |
| IInven | Series A | $11.2M | May 2025 |
 Language I/O | Seed | $5M | Jul 2024 |
| IInven | Seed | $1.5M | Mar 2023 |
Top Co-Investors
Last updated: 16 April 2026