Matrix Partners
Matrix Partners (now branded simply "Matrix") is an early-stage venture capital firm founded in 1977 by Paul Ferri, investing from idea through Series A. Headquartered in San Francisco at 535 Mission Street with a long-standing East Coast office in Cambridge, Massachusetts, the firm is run by former founders and company builders who describe themselves as "contrarians who invest with conviction," backing founders with deep technical expertise and a specific vision of the future. Matrix is a generalist early-stage investor across AI / frontier tech, B2B and enterprise software, fintech, consumer, healthtech, infrastructure, and semiconductors, typically writing seed and Series A checks and leading rounds. Over nearly five decades the firm has backed foundational technology and consumer companies including Apple, HubSpot, Zendesk, Canva, Afterpay, Oculus, Fivetran, Flock Safety, Quora, Postmates, GOAT, and Suno, with a track record spanning semiconductors and networking through today's AI-native startups.
Matrix Partners has 130 portfolio companies tracked on the APIs.io network, of which 55 (42%) publish APIs indexed here. The remaining 75 are tracked as profiles without a published API on the network.
Its highest-rated API providers on the network are hubspot, Bugsnag, CloudBees, zendesk, canva.
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.
Strong 6 Solid coverage with minor gaps
Developing 11 Usable, with meaningful gaps to close
Thin 21 Limited public surface area
Emerging 10 Early or largely undocumented
Properties
Portfolio
Where the firm publishes its investments
Cohort brief
Auto-generatedThe 105 portfolio companies with APIs in the catalog, backed by Matrix Partners, 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 | 26.6 | 23.1 | +3.5 | 105 |
| Contract Quality | 20.4 | 17.6 | +2.8 | 105 |
| Operational Transparency | 15.6 | 13.6 | +2 | 105 |
| Contract Governance | 7.1 | 6.3 | +0.8 | 105 |
| Discoverability | 58.6 | 58.2 | +0.4 | 105 |
| Access Clarity | 26.6 | 26.4 | +0.2 | 105 |
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) | 14% | 15% | -1 |
| MCP server (first-party) | 12% | 12% | 0 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 10% | 11% | -1 |
| Security | 97% | 98% | -1 |
| Arazzo workflows | 4% | 2% | +2 |
| Governance rules | 17% | 13% | +4 |
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 Canva 63.3
- 2 Bugsnag 52.2
- 3 HubSpot 50.7
- 4 Lightspark 46.2
- 5 LogRocket 43.8
- 6 CloudBees 41.9
- 7 Rainforest 41.5
- 8 Relace 37.4
- 9 Flock Safety 36.5
- 10 Zendesk 35.9
Coverage caveat. 91 of 105 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 3 October 2026, across 28834 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.
Source (apis.yml)
Work with this as data
Every firm here is available over the APIs.io API and to AI agents over MCP.