The Insight Partners API Portfolio

About this paper

I read Insight Partners’ portfolio the way a machine reads it — not the growth-equity pitch, the evidence. Insight’s public portfolio resolves to a large book of software companies in my catalog, and 214 of them ship a public API I could pull, parse, and score on the same rubric I apply to Stripe. This report is about those 214, because the interface is the part of a growth-stage software company an integrator, an acquirer, or an agent can actually inspect before the diligence memo catches up — and a fund’s book of APIs is a truer signal of its bet than its thesis page.

The headline is a growth-equity story. Insight holds the second-largest and second-most-decorated API book of any fund I can measure — 214 scored providers and 10 exemplars, behind only a16z on both — and it is at the same time the least agent-native fund in the entire deep-harvest set, at 35%. Every deeply-harvested peer ships a higher share of agent-native APIs. This is the signature of a mature estate: broad, well-documented REST surfaces that discover better than almost anyone (discoverability 81.5), on top of an agent-plumbing layer barely laid — idempotency at 5%, examples at 8%, governance averaging 37.9 with 70 upper-band companies at a flat zero. The book contracts decently and discovers beautifully; it has not yet governed itself or made itself agent-safe. And yet the one crown jewel — Qonto, with a real hosted MCP server, authored skills, a 39-scope catalog, and the full security triad — is the best-governed, most agent-native asset in this entire series, standing almost alone. This report reads that whole signal company by company: the decomposition, the Kin Score facet-by-facet, the twelve-dimension agent-readiness table, the head-to-head against ten rival funds, and the punch-list of what even the crown jewels have not shipped.

What's inside

1. Executive summary — the second-largest estate, and the lowest agent-native rate in the set
2. The firm, and the book — the 214 API-bearing companies
3. Portfolio decomposition — a dev-tools estate, not a frontier bet
4. The composite Kin Score of the book — and why the exemplar count is inflated
5. Agent-readiness of the portfolio — where the estate falls behind
6. The peer-fund benchmark — Insight vs. ten rival funds, apples to apples
7. The crown jewels — provider-by-provider, led by Qonto
8. Standards and the agentic turn — why the gaps stop being pedantry
9. Security, auth, scopes, and compliance posture across the book
10. The Enterprise/Dev-tools question, and the whitespace for the fund and its rivals
11. The investable thesis — for Insight, and for everyone reading it

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