Northzone
Northzone is a multi-stage venture capital firm founded in 1996 in Oslo and now headquartered in London, with additional offices in New York, Stockholm, Berlin and Amsterdam. The firm partners with founders across the United States and Europe from Seed through Growth, positioning itself as a single long-term partner from the first check all the way to IPO, with check sizes ranging from roughly $1M to $50M. Over nearly three decades Northzone has raised 13 funds, backed more than 250 companies, produced 18 unicorns and 14 IPOs, and reports $3.1bn+ in assets under management; its most recent flagship vehicle raised approximately €1bn. Northzone invests broadly across AI, enterprise software, fintech, consumer, healthcare, climate and energy, and infrastructure and developer tools, and is known for early backing of category creators including Spotify, Klarna, Trustpilot, Kahoot!, Personio, TrueLayer, Avito and iZettle. The firm supports portfolio companies through a Platform team and a network of 500+ operators drawn from companies such as OpenAI, Anthropic and Stripe.
Northzone has 139 portfolio companies tracked on the APIs.io network, of which 139 (100%) publish APIs indexed here.
Its highest-rated API providers on the network are Klarna, Openzeppelin, Kota, Jasper, Sourcepoint.
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.
Exemplar 1 Complete, well-documented, and agent-ready
Strong 4 Solid coverage with minor gaps
Developing 28 Usable, with meaningful gaps to close
Thin 14 Limited public surface area
Emerging 39 Early or largely undocumented
Minimal 53 Almost no public developer surface
Properties
Portfolio
Where the firm publishes its investments
Firm
The firm itself
Cohort brief
Auto-generatedThe 139 portfolio companies with APIs in the catalog, backed by Northzone, 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 | 20.9 | 17.9 | +3 | 139 |
| Access Clarity | 25.2 | 22.3 | +2.9 | 139 |
| Discoverability | 62.3 | 60.4 | +1.9 | 139 |
| Contract Governance | 6.4 | 6.4 | 0 | 139 |
| Operational Transparency | 11.1 | 11.3 | -0.2 | 139 |
| Contract Quality | 16.4 | 17.5 | -1.1 | 139 |
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) | 23% | 16% | +7 |
| MCP server (first-party) | 8% | 7% | +1 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 11% | 9% | +2 |
| Security | 96% | 88% | +8 |
| Arazzo workflows | 2% | 2% | 0 |
| Governance rules | 6% | 13% | -7 |
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.
Source (apis.yml)
Work with this as data
Every firm here is available over the APIs.io API and to AI agents over MCP.