Venture Capital

Index Ventures

Index Ventures is a global venture capital firm founded in Geneva in 1996 by Neil Rimer, David Rimer and Giuseppe Zocco, and headquartered in London with offices in San Francisco, New York, Geneva and Jersey. The firm invests across the full startup lifecycle through dedicated vehicles: Origin (seed), Venture (early-stage) and Growth funds, backing companies from seed to IPO. It focuses on artificial intelligence and machine learning, business applications, data, fintech, security, healthcare, entertainment, media, mobility, retail, open source and the future of work. Index has raised roughly $15B in total capital, including $2.3B announced in 2024 ($800M early-stage, $1.5B later-stage). Notable investments include Adyen, Figma, Datadog, Discord, Revolut, Wise, Robinhood, Roblox, Confluent, Anthropic, Scale AI and Wiz. Its philosophy emphasizes backing founders on character and vision — 'we invest in who you are, not just what you do.'

317 portfolio companies 315 publish APIs here 13 properties
Venture CapitalSeedEarly StageGrowthFintechArtificial IntelligenceDeveloper ToolsInfrastructureEuropeNorth America
Portfolio Strength across 142 profiled portfolio companies on the network
25 top-rated API companies 8 exemplar · 17 strong
55 agent-ready companies 13 agent-native · 42 agent-ready
Average quality of the book:
Composite thin 40.3
Agent-Readiness agent-aware 26.0

Firms are ranked by cumulative portfolio strength — how many highly-rated API companies they've backed, weighted by tier across composite quality and agent-readiness. The averages below are a secondary read on the typical company in the book.

Index Ventures has 317 portfolio companies tracked on the APIs.io network, of which 142 (45%) publish APIs indexed here. The remaining 173 are tracked as profiles without a published API on the network.

Its highest-rated API providers on the network are Confluent, Anthropic, Squarespace, Outbrain, Iterable.

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 8 Complete, well-documented, and agent-ready
Strong 17 Solid coverage with minor gaps
Developing 51 Usable, with meaningful gaps to close
Thin 43 Limited public surface area
Emerging 20 Early or largely undocumented
Minimal 3 Almost no public developer surface

Rest of Portfolio

2 further portfolio companies that don’t yet have a provider page on the network.

Cockroach LabsSeedcamp

Scroll for all 2

Properties

Portfolio

Where the firm publishes its investments

Team

Partners and investing staff

Content

Blog, podcast, newsletter, and research

Firm

The firm itself

Cohort brief

Auto-generated

The 281 portfolio companies with APIs in the catalog, backed by Index Ventures, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
281
of 315 on the roster
Mean Kin Score
26.8
+2.4 vs catalog 24.4
Mean Agent Readiness
14.1
+1.4 vs catalog 12.7
Spread
3.1–79.1
median 19.9 · σ 18.3
How the 281 split by band
Exemplar 8Strong 17Developing 51Thin 45Emerging 96Minimal 64
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Access Clarity 33.2 27.2 +6 281
Operational Transparency 17.6 14.4 +3.2 281
Developer Ergonomics 25.5 23.8 +1.7 281
Contract Quality 21.9 20.4 +1.5 281
Discoverability 62.2 61.5 +0.7 281
Contract Governance 6.2 6.6 -0.4 281

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.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 15% 11% +4
MCP server (first-party) 21% 13% +8
Agent Skills 0% 0% 0
OAuth scopes 12% 12% 0
Security 100% 96% +4
Arazzo workflows 2% 2% 0
Governance rules 16% 13% +3

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.

Top by Kin Score
  1. 1 Confluent 79.1
  2. 2 Anthropic 77.8
  3. 3 Squarespace 73.9
  4. 4 Outbrain 73.4
  5. 5 Iterable 73
  6. 6 Plaid 71.6
  7. 7 ClickHouse 70.5
  8. 8 Adyen 69.5
  9. 9 Common Room 65
  10. 10 Parallel 65
Top by Agent Readiness
  1. 1 Parallel 65
  2. 2 Common Room 63.8
  3. 3 Goody 63.1
  4. 4 Duvo Ai 63.1
  5. 5 ClickHouse 61.8
  6. 6 Ando 59.2
  7. 7 Anrok 56.5
  8. 8 Figma 54.7
  9. 9 Notion 52.3
  10. 10 Plain 51.1
This roster declares 315 members; 296 resolve to a provider in the catalog and 281 carry a score (95%). The figures above describe the scored members only.Generated from the catalog build of 22 September 2026, across 27674 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)

apis.yml Raw ↑
aid: index-ventures
name: Index Ventures
description: 'Index Ventures is a global venture capital firm founded in Geneva in 1996 by Neil Rimer,
  David Rimer and Giuseppe Zocco, and headquartered in London with offices in San Francisco, New York,
  Geneva and Jersey. The firm invests across the full startup lifecycle through dedicated vehicles: Origin
  (seed), Venture (early-stage) and Growth funds, backing companies from seed to IPO. It focuses on artificial
  intelligence and machine learning, business applications, data, fintech, security, healthcare, entertainment,
  media, mobility, retail, open source and the future of work. Index has raised roughly $15B in total
  capital, including $2.3B announced in 2024 ($800M early-stage, $1.5B later-stage). Notable investments
  include Adyen, Figma, Datadog, Discord, Revolut, Wise, Robinhood, Roblox, Confluent, Anthropic, Scale
  AI and Wiz. Its philosophy emphasizes backing founders on character and vision — ''we invest in who
  you are, not just what you do.'''
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://logo.clearbit.com/indexventures.com
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.23'
x-type: venture-capital
x-category: Venture Capital
tags:
- Venture Capital
- Seed
- Early Stage
- Growth
- Fintech
- Artificial Intelligence
- Developer Tools
- Infrastructure
- Europe
- North America
tags_raw:
- Venture Capital
- Seed
- Early Stage
- Growth
- Fintech
- AI
- Developer Tools
- Infrastructure
- Europe
- North America
apis: []
common:
- type: Website
  url: https://www.indexventures.com/
- type: Portfolio
  url: https://www.indexventures.com/companies/
- type: Portfolio
  url: portfolio/index-ventures-portfolio.yml
- type: Team
  url: https://www.indexventures.com/team/
- type: Team
  url: team/index-ventures-team.yml
- type: InvestmentThesis
  url: https://www.indexventures.com/philosophy/
- type: Blog
  url: https://www.indexventures.com/perspectives/
- type: News
  url: https://www.indexventures.com/index-press/
- type: Jobs
  url: https://www.indexventures.com/startup-jobs
- type: Contact
  url: https://www.indexventures.com/contact-us/
- type: Crunchbase
  url: https://www.crunchbase.com/organization/index-ventures
- type: LinkedIn
  url: https://www.linkedin.com/company/index-ventures
- type: Twitter
  url: https://x.com/indexventures
- type: Features
  data:
  - 'Stage: Seed (Origin), Early-stage (Venture), Growth'
  - 'Sectors: AI/ML, business applications, data, fintech, security, healthcare, entertainment, media,
    mobility, retail, open source, future of work'
  - 'Geography: Global (Europe, North America)'
  - 'Total capital raised: ~$15B'
  - '2024 funds: $2.3B ($800M early-stage, $1.5B later-stage)'
  - 'Founded: 1996 (Geneva)'
  - 'HQ: London (offices in San Francisco, New York, Geneva, Jersey)'
  - 'Founders: Neil Rimer, David Rimer, Giuseppe Zocco'
  sources:
  - https://www.indexventures.com/
  - https://en.wikipedia.org/wiki/Index_Ventures
  updated: '2026-07-17'
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
  url: https://apievangelist.com
- FN: APIs.json
  url: http://apisjson.org
- FN: Index Ventures
  url: https://www.indexventures.com/
  email: info@indexventures.com

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Tools for venture capital

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  • find_investorsThe reverse edge — which firms back a given provider.
  • cohort_statsPRO — the portfolio as a scored cohort.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
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