60 seed investors in Massachusetts, including 56 in Boston
We list 60 seed investors in Massachusetts as of November 2026: each has an SEC filing on file, and the list was last checked on 6 Nov 2026. The cities with the most head offices on this list are Boston (30), Cambridge (11) and Wellesley Hills (3). 56 of the 60 are in the Boston metro area, so this page is also our list of seed investors in Boston.
Top 5 seed investors in Massachusetts, ranked by recent fund activity
Among firms with a published profile and a dated fund or deal in the last 24 months. The rule: Activity score out of 100: recency of the latest fund filing or dated deal (40: full marks within 3 months, then stepping down at 6, 12 and 24 months), stage focus (15: all of it when seed is the only stage the firm states, split evenly when it states more), stated focus on the US (15: full marks when the firm names the US as where it invests, half when it says global), size of the fund on file on a log scale (20) and completeness of the public record (10). Stage and regional focus are our research, not an SEC figure. It is a measure of activity and fit, not of quality or returns. The same rule orders the whole list; it is repeated in the method box.
Safar Partners
Type: VC firm · HQ: Cambridge, MA · Stages: Seed · Focus: Healthtech, Industrial Tech, Biotech, Deep Tech · Latest activity: New deal, Aug 2026 · Fund size on file: $300M (SEC Form D, 2023)
Dated new deal in Aug 2026; $300M fund on file (SEC Form D, 2023); backs seed; names the US as where it invests; 3 named decision-makers on file.
Building Ventures
Type: VC firm · HQ: Boston, MA · Stages: Seed · Focus: Proptech, AI, Climate Tech, Energy · Latest activity: New deal, Sep 2026 · Fund size on file: $100M (SEC Form D, 2021)
Dated new deal in Sep 2026; $100M fund on file (SEC Form D, 2021); backs seed; names the US as where it invests; 8 named decision-makers on file.
NextView Ventures
Type: VC firm · HQ: Boston, MA · Stages: Pre-seed, Seed · Focus: AI, Marketing Tech, Robotics, Industrial Tech · Latest activity: New deal, Oct 2026 · Fund size on file: $135M (SEC Form D, 2025)
Dated new deal in Oct 2026; $135M fund on file (SEC Form D, 2025); backs pre-seed, seed; names the US as where it invests; 6 named decision-makers on file.
Inflection
Type: VC firm · HQ: Framingham, MA · Stages: Pre-seed, Seed · Focus: AI, Space, Defense Tech, Crypto and Web3 · Latest activity: New fund, Sep 2026 · Fund size on file: $50M (SEC Form D, 2026)
Latest fund filing dated Sep 2026; $50M fund on file (SEC Form D, 2026); backs pre-seed, seed; names the US as where it invests; 3 named decision-makers on file.
Cybernetix Ventures
Type: VC firm · HQ: Boston, MA · Stages: Pre-seed, Seed, Series A · Focus: Robotics, Industrial Tech, Logistics, AI · Latest activity: New fund, Aug 2026 · Fund size on file: $100M (SEC Form D, 2025)
Latest fund filing dated Aug 2026; $100M fund on file (SEC Form D, 2025); backs pre-seed, seed, Series A; names the US as where it invests; 2 named decision-makers on file.
First 25 of 60 seed investors in Massachusetts
| Investor | Type | HQ | Stagesour research | Focusour research | Latest fund or deal | Fund sizeas filed or stated | Checked | Contacts |
|---|---|---|---|---|---|---|---|---|
| Safar Partners | VC firm | Cambridge, MA | Seed | Healthtech, Industrial Tech, Biotech, Deep Tech | New deal, Aug 2026 | $300M (SEC Form D, 2023) | 4 Nov 2026 | 3 names, firm email · Unlock |
| Building Ventures | VC firm | Boston, MA | Seed | Proptech, AI, Climate Tech, Energy | New deal, Sep 2026 | $100M (SEC Form D, 2021) | 5 Nov 2026 | 8 names · Unlock |
| NextView Ventures | VC firm | Boston, MA | Pre-seed, Seed | AI, Marketing Tech, Robotics, Industrial Tech | New deal, Oct 2026 | $135M (SEC Form D, 2025) | 4 Nov 2026 | 6 names · Unlock |
| Inflection | VC firm | Framingham, MA | Pre-seed, Seed | AI, Space, Defense Tech, Crypto and Web3 | New fund, Sep 2026 | $50M (SEC Form D, 2026) | 4 Nov 2026 | 3 names, firm email · Unlock |
| Cybernetix Ventures | VC firm | Boston, MA | Pre-seed, Seed, Series A | Robotics, Industrial Tech, Logistics, AI | New fund, Aug 2026 | $100M (SEC Form D, 2025) | 4 Nov 2026 | 2 names · Unlock |
| Catalyst Health Ventures | VC firm | Braintree, MA | Seed | Healthtech, Medtech | Portfolio news, Jun 2026 | $125M (SEC Form D, 2022) | 5 Nov 2026 | 3 names · Unlock |
| Ignia | VC firm | Boston, MA | Seed | Fintech, AI, Ecommerce, Healthtech | Portfolio news, May 2026 | $10M (SEC Form D, 2022) | 5 Nov 2026 | 8 names, firm email · Unlock |
| Founder Collective | VC firm | Cambridge, MA | Pre-seed, Seed | AI, Ecommerce, Healthtech, Generalist | New deal, Jul 2026 | $95M (SEC Form D, 2023) | 5 Nov 2026 | 8 names, firm email · Unlock |
| Link Ventures | VC firm | Cambridge, MA | Pre-seed, Seed, Series A | AI, Robotics, Industrial Tech, Space | New deal, Jun 2026 | $200M (SEC Form D, 2021) | 5 Nov 2026 | 8 names, firm email · Unlock |
| Winter Street Ventures | VC firm | Boston, MA | Seed, Series A | Healthtech, AI, Medtech | New fund, Jun 2026 | $75M (SEC Form D, 2026) | 4 Nov 2026 | 2 names, firm email · Unlock |
| Will Ventures | VC firm | Boston, MA | Seed | Media, Consumer, Healthtech | New fund, Mar 2026 | $87M (SEC Form D, 2025) | 4 Nov 2026 | 1 name · Unlock |
| Timescale Ventures | VC firm | Marblehead, MA | Pre-seed, Seed | Energy, Industrial Tech, AI, Space | New fund, Sep 2026 | $50M (SEC Form D, 2025) | 4 Nov 2026 | 2 names, firm email · Unlock |
| Thirdrockventures | VC firm | Boston, MA | Pre-seed, Seed | Healthtech, Biotech, Medtech | New fund, Jun 2026 | $1.1B (SEC Form D, 2022) | 4 Nov 2026 | 8 names · Unlock |
| Clean Energy Ventures | VC firm | Boston, MA | Seed, Series A | Energy, Climate Tech, Fintech, Deep Tech | New deal, May 2026 | $306M (SEC Form D, 2022) | 5 Nov 2026 | 8 names, firm email · Unlock |
| Oui Capital | VC firm | Millbury, MA | Pre-seed, Seed | Fintech, B2B, Mobility, Ecommerce | Portfolio news, Sep 2026 | $9M (SEC Form D, 2022) | 5 Nov 2026 | 7 names · Unlock |
| Underscore VC | VC firm | Boston, MA | Pre-seed, Seed | AI, Fintech, Healthtech, SaaS | New deal, Apr 2026 | $58M (SEC Form D, 2023) | 5 Nov 2026 | 8 names, firm email · Unlock |
| Parallel Venture Capital | VC firm | Boston, MA | Pre-seed, Seed | Defense Tech, AI, Cybersecurity, Quantum | New fund, Mar 2026 | $25M (SEC Form D, 2025) | 4 Nov 2026 | 4 names · Unlock |
| Azolla Ventures | VC firm | Cambridge, MA | Seed | Climate Tech, Energy, Industrial Tech, Agritech | New fund, Mar 2026 | $130M (SEC Form D, 2021) | 4 Nov 2026 | 3 names, firm email · Unlock |
| Companyon Ventures | VC firm | Boston, MA | Seed | AI, Future of Work, Fintech, SaaS | New fund, Mar 2026 | $100M (SEC Form D, 2026) | 4 Nov 2026 | 8 names · Unlock |
| Castle Island Ventures | VC firm | Boston, MA | Seed | Crypto and Web3, Fintech, AI, SaaS | New deal, Jun 2026 | 4 Nov 2026 | 8 names, firm email · Unlock | |
| Cure Ventures | VC firm | Boston, MA | Pre-seed, Seed | Biotech, Healthtech | New fund, Dec 2025 | $350M (SEC Form D, 2021) | 4 Nov 2026 | 8 names, firm email · Unlock |
| One Way Ventures | VC firm | Boston, MA | Pre-seed, Seed, Growth | AI, SaaS, Fintech, Deep Tech | New fund, Jan 2026 | $60M (SEC Form D, 2025) | 4 Nov 2026 | 8 names, firm email · Unlock |
| Boston Seed | VC firm | Wellesley Hills, MA | Pre-seed, Seed | AI, Developer Tools, Fintech, Gaming | New deal, Jul 2025 | $60M (SEC Form D, 2024) | 5 Nov 2026 | 6 names · Unlock |
| Kepha | VC firm | Waltham, MA | Seed | $182M (SEC Form ADV) | 5 Nov 2026 | 3 names · Unlock | ||
| milemark•capital | VC firm | Cambridge, MA | Seed | AI, Generalist | New fund, Jun 2024 | $70M (SEC Form D, 2024) | 5 Nov 2026 | 4 names, firm email · Unlock |
You are seeing 25 of 60. The full list adds 35 more investors and 324 named decision-makers.
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56 seed investors in Boston
29 of the 56 have a fund filing or a dated deal in the last 12 months; the median fund size on file is $100M (SEC Form D, 39 firms); the most recent fund filings are from Branch Venture Partners (Nov 2026), BCV Emerge (Oct 2026) and Inflection (Sep 2026); of the 56 with a stage on file, seed (56), pre-seed (28) and Series A (17); the count covers the metro area, by city: Boston (30), Cambridge (11) and Wellesley Hills (3); the paid file holds 309 named decision-makers for them.
The first 5 in list order: Safar Partners, Building Ventures, NextView Ventures, Inflection and Cybernetix Ventures. They are ranked with the rest of the list, by the same rule.
How these 60 break down
By city
| City | On this list | Share |
|---|---|---|
| Boston | 30 | 50% |
| Cambridge | 11 | 18% |
| Wellesley Hills | 3 | 5% |
| Waltham | 3 | 5% |
| Wellesley | 2 | 3% |
| Lincoln | 2 | 3% |
By sector
| Sector | On this list | Share |
|---|---|---|
| AI | 38 | 63% |
| SaaS | 32 | 53% |
| Healthtech | 28 | 47% |
| Industrial Tech | 15 | 25% |
| Fintech | 15 | 25% |
| Biotech | 14 | 23% |
| Medtech | 14 | 23% |
| Deep Tech | 13 | 22% |
| Climate Tech | 13 | 22% |
| Hardware | 13 | 22% |
| Energy | 11 | 18% |
| Robotics | 9 | 15% |
Sector is our research. A firm can carry more than one sector.
By type
| Type | On this list | Share |
|---|---|---|
| VC firm | 59 | 98% |
| Corporate VC | 1 | 2% |
Method and limits
- Source
- All 60 rows carry an SEC filing (Form D or Form ADV). All 60 have a website we checked. Filing date and fund size are SEC data where a filing exists. Stage, sector and check size are our research.
- Inclusion rule
- Organizations that back startups. Individuals, buyout funds and firms we found to be inactive are left out. Stage: the firm states that it invests at seed. Place: head office in Massachusetts.
- Order
- Firms with a published profile come first. Activity score out of 100: recency of the latest fund filing or dated deal (40: full marks within 3 months, then stepping down at 6, 12 and 24 months), stage focus (15: all of it when seed is the only stage the firm states, split evenly when it states more), stated focus on the US (15: full marks when the firm names the US as where it invests, half when it says global), size of the fund on file on a log scale (20) and completeness of the public record (10). Stage and regional focus are our research, not an SEC figure. It is a measure of activity and fit, not of quality or returns.
- Last refreshed
- November 2026. Rows on this list were checked between 4 Nov 2026 and 6 Nov 2026.
- Fill rates
- Of 60 rows: stage 60, sector 58, fund size 54, website 60. In the paid file: named decision-makers on 59 rows, firm email on 24, LinkedIn page on 30, check size on 4.
- Corrections
- Email [email protected] or use the update form. We act within 5 working days.
Questions
How many seed investors in Massachusetts are there?
We list 60 as of November 2026. 32 of the 60 have a fund filing or a dated deal in the last 12 months. The cities with the most are Boston (30), Cambridge (11) and Wellesley Hills (3).
Which seed investors in Massachusetts raised a new fund in the last 12 months?
20 of the 60 have a fund filing dated in the last 12 months. The most recent on this list are Branch Venture Partners (Nov 2026), BCV Emerge (Oct 2026) and Timescale Ventures (Sep 2026).
What is the typical fund size of seed investors in Massachusetts?
The median fund size on file for this list is $95M, across the 43 firms with a size on an SEC Form D. The fund on file is each firm's main fund, which is not always its newest. The other 17 do not disclose a size there.
How do I contact seed investors in Massachusetts?
The paid file holds 324 named decision-makers across 59 of these 60 and a firm email for 24. We publish the address a firm lists itself, never a personal email. Each free row links to a profile with the firm's website.
Where does the data on seed investors in Massachusetts come from?
All 60 rows have an SEC filing on file (Form D or Form ADV). Filing date and fund size come from the filing. Stage, sector and check size are our research. Rows on this list were last checked on 6 Nov 2026 at the latest. The whole file is re-verified twice a year.
Related lists
Seed investors in California (415)Seed investors in New York (128)Seed investors in Florida (64)Seed investors in Texas (49)Pre-seed investors in Massachusetts (48)Seed investors in Illinois (33)Seed investors in Colorado (22)Seed investors in Washington (21)Seed investors in Pennsylvania (19)Series A investors in Massachusetts (18)Growth-stage investors in Massachusetts (18)Seed investors in Connecticut (17)
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