The short answer
Our database lists 1,806 startup investors in the Boston area, including 209 angels or syndicates and 228 family offices. 375 list pre-seed and 1,331 list seed. (Zalarma investor database, as of 2026-11-01.)
What stages they back
Of the 1,498 records in Boston that list a stage, here is how many invest at each one (investors often list several).
Investors by stage
Who they are
The mix of investor types tells you where your first checks are most likely to come from.
Investors by type
Sectors they focus on
Sector focus as listed on each record. Generalists who list many sectors are counted in each.
Investors by sector focus
Typical check sizes
Based on the 1,484 records that list a check size (we use the low end of a stated range).
Investors by typical check size
Firms with the most investors listed in Boston
Firms ranked by how many of their Boston-area investors appear in our database with a stage listed.
| Firm | Main stages | Listed |
|---|---|---|
| Bain Capital Ventures | Seed, Series A, Series B+ | 95 |
| Flagship Pioneering | Seed, Series A | 27 |
| Bain Capital | Seed, Series A, Series B+ | 26 |
| RA Capital Management | Seed, Series A, Series B+ | 22 |
| Silversmith Capital Partners | Series B+ | 20 |
| F-Prime Capital (formerly Fidelity Biosciences) | Seed, Series A | 16 |
| Battery Ventures | Seed, Series A | 15 |
| Third Rock Ventures | Seed, Series A, Series B+ | 13 |
| Mendoza Ventures | Pre-seed, Seed | 13 |
| Breakthrough Energy Ventures | Seed, Series A, Series B+ | 13 |
| Summit Partners | Series B+ | 12 |
| Flare Capital Partners | Seed, Series A, Series B+ | 12 |
How to raise in Boston
- Map the local ecosystem first: accelerators, university venture programs, angel groups and the founders who raised here in the last two years.
- Ask every local founder you meet one question: which investor was most helpful, and would they introduce you?
- Pair local checks with a few out-of-town funds that back your sector; a local lead makes national investors more comfortable.
- Read the pre-seed without a network playbook.
About this data
Counts are records in the Zalarma investor database, as of 2026-11-01: angels, venture firms and their partners, micro-VCs, family offices, corporate VCs and accelerators that list startup investing. One investor can appear in several stage or sector rows. Stage, sector and check size come from what each record lists, so not every record has every field. Counts under 10 are not shown. Firm names are listed; we do not publish personal contact details on this site. Read how we build and check the data.
Frequently asked questions
How many startup investors are in Boston?
The Zalarma investor database lists 1,806 startup investors in the Boston area as of 2026-11-01.
Are there angel investors in Boston?
Yes. 209 records in the Boston area are angels or angel syndicates.
How do I get introduced?
Start with the investors who fit your stage and sector, then find a warm path through founders they backed, local angel groups and accelerators. Zalarma can build a matched shortlist for you.