Glasswing Ventures is an early-stage venture capital firm based in Boston that invests in AI-native and frontier technology startups transforming enterprise B2B and cybersecurity markets. The firm acts as a first-capital-in investor at the pre-seed and seed stages.
Deal activity increased 300% year-over-year (8 deals in the last 12 months). Their most common stage is seed (50% of deals). Average disclosed round size is $9.3M (across 62 rounds with reported amounts).
Portfolio
45
Fund Size
$203M
Top Stage
Seed
Last 12 Mo
8
Team
Ellen Rubin
Operating Partner
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
66 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Enlaye | Seed | $5M | Jun 2026 |
 Krane | Seed | $9M | Mar 2026 |
 Allure Security | Series B | $17M | Mar 2026 |
| GGenFlux | Seed | $4.2M | Mar 2026 |
 Cydelphi | Seed | $3M | Feb 2026 |
 Sigma Automate | Unknown | $2.8M | Jan 2026 |
 Realm.Security | Seed | $2M | Dec 2025 |
| Realm.Security | Series A | $15M | Oct 2025 |
 Iris | Seed | $6.2M | Sep 2025 |
 Infinity Loop | Seed | $5M | Aug 2025 |
 Basetwo | Series A | $11.5M | Jan 2025 |
| Realm.Security | Series A | $15M | Jan 2025 |
 Dannce | Pre-Seed | $2.6M | Nov 2024 |
| Allure Security | Series A | $10M | Apr 2024 |
 Kusari | Seed | $8M | Jan 2024 |
 Ship Angel | Unknown | $5M | Jan 2024 |
 Retrocausal | Seed | $5.3M | Nov 2023 |
 Telmai | Seed | $5.5M | Jun 2023 |
 Labviva | Series B | $20M | Mar 2023 |
 Trustle | Seed | $6M | Jan 2023 |
 AskFora | Pre-Seed | $1.5M | Jan 2023 |
| RRetrocausal.ai | Unknown | $5.3M | Jan 2023 |
 FeatureByte | Seed | $5.7M | Jul 2022 |
 Atlantic Quantum | Seed | — | Jul 2022 |
 Atlantic Quantum | Seed | $9M | Jul 2022 |
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Top Co-Investors
Gutbrain Ventures7 shared
Plug and Play Tech Center7 shared
Argon Ventures6 shared
Zetta Venture Partners4 shared
Greycroft4 shared
PBJ Capital4 shared
Inovia Capital4 shared
.406 Ventures4 shared
Moore Strategic Ventures3 shared
Data Point Capital3 shared
Techstars3 shared
Differential Ventures3 shared
Ascend Vietnam Ventures3 shared
Portage Ventures3 shared
Future Fund3 shared
HPA3 shared
Curql3 shared
TCA Venture Group3 shared
Senator Investment Group3 shared
Global Brain Corporation3 shared
Last updated: 7 October 2026