Sigma Prime Ventures is an early-stage venture capital firm based in Boston that invests in technology companies solving hard business problems with SaaS, cloud, mobile, disruptive technologies, and technology-enabled services. The firm was spun out of Sigma Partners and formally established in 2012, with its partners tracing their investing lineage back to 1984.
Average disclosed round size is $19.0M (across 37 rounds with reported amounts).
Portfolio
24
Fund Size
$115.6M
Top Stage
Series A
Last 12 Mo
0
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
45 investments
| Company | Round | Amount | Date |
|---|---|---|---|
| AaPriori | Series A | $20M | Jan 2025 |
 Nasuni | Growth | — | Jul 2024 |
| AaPriori | Series D | — | Jan 2024 |
| AaPriori | Series D | $30M | Sep 2021 |
| AaPriori | Series C | $5M | Apr 2021 |
 Ceros | Series D | $100M | Jan 2020 |
| Ceros | Series C | $14M | Feb 2019 |
| AaPriori Technologies | Series C | $26.8M | Jan 2019 |
| AaPriori | Series C | $26.8M | Jan 2019 |
| Ceros | Series C | $14M | Jan 2019 |
 Phenom People | Series B | $22M | May 2018 |
 Phenom | Series B | — | May 2018 |
| Phenom People | Seed | — | Jan 2018 |
| DDecibel Insight | Series A | $9M | May 2017 |
 CloudHealth Technologies | Series D | $46M | Jan 2017 |
| Nasuni | Series E | $17.5M | Dec 2016 |
 NS1 | Series B | $20M | Sep 2016 |
| CloudHealth Technologies | Series C | $20M | Jan 2016 |
 Tvision Insights | Seed | $2.5M | Dec 2015 |
 Codeship | Seed | $2.6M | Dec 2015 |
| Phenom People | Series A | $6M | Oct 2015 |
| BBarkly | Series A | $12.5M | Jun 2015 |
 Nsone | Series A | $5.3M | Apr 2015 |
| NnToggle | Series A | $5.6M | Feb 2015 |
| BBarkly | Series A | $12.5M | Jan 2015 |
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Top Co-Investors
Sigma9 shared
Flybridge Capital Partners6 shared
Sierra Ventures5 shared
Techstars4 shared
Founder Collective4 shared
Silicon Valley Bank4 shared
Grotech Ventures4 shared
StarVest Partners4 shared
Greycroft4 shared
Kleiner Perkins4 shared
.406 Ventures4 shared
Scale Venture Partners3 shared
Boston Seed Capital3 shared
Two Sigma Ventures3 shared
New Enterprise Associates3 shared
Gutbrain Ventures3 shared
PBJ Capital3 shared
Greenspring Associates3 shared
private angel investors2 shared
Lightbank2 shared
Last updated: 20 October 2026