Foundry Group
Foundry Group is a Boulder, Colorado venture capital firm founded in 2007 by Brad Feld, Seth Levine, Ryan McIntyre, and Jason Mendelson. The firm invests in early-stage technology startups across the United States, organizing its work around long-lived, horizontal investment themes (such as "glue", "protocol", "distribution", and "human computer interaction") rather than narrow verticals, with a particular affinity for hardware, robotics, consumer internet, developer tools, and B2B SaaS. Foundry pioneered a "network-driven" model that operates both as a direct investor in startups and as a limited partner in a curated network of more than 40 partner venture funds. The firm manages more than $3.0B for its limited partners, has made 320+ investments and 70+ exits, and is known for radical transparency through the books, blogs, and podcasts of its partners. Notable investments include Fitbit, Zynga, SendGrid, MakerBot, Gnip, Mapbox, SeatGeek, and WHOOP. In 2022 the partners announced Foundry would not raise another fund, continuing to steward its existing funds and portfolio through their life.
Foundry Group has 110 portfolio companies tracked on the APIs.io network, of which 98 (89%) publish APIs indexed here.
Its highest-rated API providers on the network are SendGrid, Fitbit, Vendasta, WHOOP, HelloSign.
Portfolio on the Network
Portfolio companies that publish APIs indexed on APIs.io, grouped by their API Evangelist rating. Exemplar and Strong are expanded by default.
Developing 13 Usable, with meaningful gaps to close
Thin 15 Limited public surface area
Emerging 23 Early or largely undocumented
Minimal 42 Almost no public developer surface
Rest of Portfolio
12 further portfolio companies that don’t yet have a provider page on the network.
Scroll for all 12
Properties
Cohort brief
Auto-generatedThe 98 portfolio companies with APIs in the catalog, backed by Foundry Group, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Developer Ergonomics | 20.1 | 17.9 | +2.2 | 98 |
| Discoverability | 61.6 | 60.4 | +1.2 | 98 |
| Access Clarity | 23.2 | 22.3 | +0.9 | 98 |
| Contract Governance | 7.2 | 6.4 | +0.8 | 98 |
| Operational Transparency | 10.4 | 11.3 | -0.9 | 98 |
| Contract Quality | 16.2 | 17.5 | -1.3 | 98 |
A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 21% | 16% | +5 |
| MCP server (first-party) | 8% | 7% | +1 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 18% | 9% | +9 |
| Security | 95% | 88% | +7 |
| Arazzo workflows | 1% | 2% | -1 |
| Governance rules | 8% | 13% | -5 |
mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.
- 1 SendGrid 77
- 2 Fitbit 67.6
- 3 Vendasta 63.3
- 4 Dropbox Sign (HelloSign) 60.7
- 5 WHOOP 60.4
- 6 Spekit 54.5
- 7 AppDirect 53.3
- 8 Sovrn 49.3
- 9 SingleFile 49.2
- 10 Sofar Ocean 49.2
- 1 Dropbox Sign (HelloSign) 51.3
- 2 Spekit 50
- 3 Landing 46.9
- 4 AppDirect 41.5
- 5 SendGrid 41.2
- 6 Sovrn 37.6
- 7 NIFT 37.6
- 8 Vendasta 34.3
- 9 Sofar Ocean 32.7
- 10 WHOOP 31.7
Source (apis.yml)
Work with this as data
Every firm here is available over the APIs.io API and to AI agents over MCP.