Venture Capital

Atomico

Atomico is a London-headquartered European venture capital firm founded in 2006 by Niklas Zennstrom, co-founder of Skype and Kazaa. Atomico partners with Europe's most ambitious technology founders from the earliest stages to pre-IPO across two dedicated teams: a Venture team that invests predominantly at Series A alongside occasional Seed opportunities, and a Growth team that invests from Series B to pre-IPO. In September 2024 the firm closed its largest ever fundraise, $1.24 billion across two funds - a $754M Atomico Growth VI vehicle and a $485M Atomico Venture VI vehicle - bringing total capital raised across seven funds to more than $5 billion. Growth-stage checks typically range from roughly $10M to $50M+. Atomico invests broadly across enterprise software, fintech, consumer, health, AI, developer tools, infrastructure, industrial and climate technology, with an explicit thesis that European technology has come of age. The firm operates offices in London, Paris, Berlin and Stockholm and is known for backing category-defining companies including Klarna, Stripe, Supercell, Graphcore, DeepL, Pipedrive, Truecaller, Wellhub, Lilium, Compass, Hinge Health and Sorare. Atomico also publishes the annual State of European Tech report, the definitive data-driven analysis of the European technology ecosystem.

35 portfolio companies 35 publish APIs here 14 properties
Venture CapitalSeries ASeedGrowth EquityEnterpriseFintechArtificial IntelligenceDeveloper ToolsConsumerHealthClimateEuropeLondon
Portfolio Strength across 35 profiled portfolio companies on the network
4 top-rated API companies 3 exemplar · 1 strong
10 agent-ready companies 2 agent-native · 8 agent-ready
Average quality of the book:
Composite thin 30.0
Agent-Readiness agent-aware 15.2

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.

Atomico has 35 portfolio companies tracked on the APIs.io network, of which 35 (100%) publish APIs indexed here.

Its highest-rated API providers on the network are Stripe, Attentive, Klarna, Corti, Factorial.

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 3 Complete, well-documented, and agent-ready
Strong 1 Solid coverage with minor gaps
Developing 10 Usable, with meaningful gaps to close
Thin 3 Limited public surface area
Emerging 12 Early or largely undocumented
Minimal 6 Almost no public developer surface

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

Providers
35
all scored
Mean Kin Score
30.6
+9.9 vs catalog 20.7
Mean Agent Readiness
16
+6.3 vs catalog 9.7
Spread
5.2–83.2
median 22.2 · σ 20.4
How the 35 split by band
Exemplar 2Strong 1Developing 10Thin 4Emerging 12Minimal 6
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Access Clarity 34.2 22.3 +11.9 35
Contract Quality 27.8 17.5 +10.3 35
Developer Ergonomics 27.2 17.9 +9.3 35
Operational Transparency 19.7 11.3 +8.4 35
Discoverability 66.3 60.4 +5.9 35
Contract Governance 11.5 6.4 +5.1 35

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) 26% 16% +10
MCP server (first-party) 9% 7% +2
Agent Skills 0% 0% 0
OAuth scopes 31% 9% +22
Security 100% 88% +12
Arazzo workflows 3% 2% +1
Governance rules 23% 13% +10

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 Stripe 83.2
  2. 2 Attentive 73.4
  3. 3 Corti 62.4
  4. 4 SmartNews 53.3
  5. 5 Factorial 52.8
  6. 6 DeepL 49.9
  7. 7 Wellhub 48.8
  8. 8 Truecaller 48
  9. 9 Strise 47.5
  10. 10 Pipedrive 45.7
Top by Agent Readiness
  1. 1 Stripe 47.8
  2. 2 Strise 45.5
  3. 3 Klarna 37.3
  4. 4 Attentive 34.2
  5. 5 Factorial 34.2
  6. 6 SmartNews 33.6
  7. 7 Truecaller 33.1
  8. 8 Corti 32.9
  9. 9 Wellhub 31.5
  10. 10 Aiven 29.6
All 35 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 25 August 2026, across 26891 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: atomico
name: Atomico
description: >-
  Atomico is a London-headquartered European venture capital firm founded in 2006 by Niklas Zennstrom,
  co-founder of Skype and Kazaa. Atomico partners with Europe's most ambitious technology founders from
  the earliest stages to pre-IPO across two dedicated teams: a Venture team that invests predominantly at
  Series A alongside occasional Seed opportunities, and a Growth team that invests from Series B to pre-IPO.
  In September 2024 the firm closed its largest ever fundraise, $1.24 billion across two funds - a $754M
  Atomico Growth VI vehicle and a $485M Atomico Venture VI vehicle - bringing total capital raised across
  seven funds to more than $5 billion. Growth-stage checks typically range from roughly $10M to $50M+.
  Atomico invests broadly across enterprise software, fintech, consumer, health, AI, developer tools,
  infrastructure, industrial and climate technology, with an explicit thesis that European technology has
  come of age. The firm operates offices in London, Paris, Berlin and Stockholm and is known for backing
  category-defining companies including Klarna, Stripe, Supercell, Graphcore, DeepL, Pipedrive, Truecaller,
  Wellhub, Lilium, Compass, Hinge Health and Sorare. Atomico also publishes the annual State of European
  Tech report, the definitive data-driven analysis of the European technology ecosystem.
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://atomico.com/favicon.ico
x-type: venture-capital
x-category: Venture Capital
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.23'
tags:
  - Venture Capital
  - Series A
  - Seed
  - Growth Equity
  - Enterprise
  - Fintech
  - Artificial Intelligence
  - Developer Tools
  - Consumer
  - Health
  - Climate
  - Europe
  - London
apis: []
common:
  - type: Website
    url: https://atomico.com/
  - type: Portfolio
    url: https://atomico.com/companies
  - type: Portfolio
    url: portfolio/atomico-portfolio.yml
  - type: Team
    url: https://atomico.com/team
  - type: Team
    url: team/atomico-team.yml
  - type: InvestmentThesis
    url: https://atomico.com/our-approach
  - type: InvestmentThesis
    url: https://atomico.com/how-we-invest
  - type: InvestmentThesis
    url: https://atomico.com/areas-of-interest
  - type: Blog
    url: https://atomico.com/insights
  - type: News
    url: https://atomico.com/insights
  - type: Jobs
    url: https://atomico.com/careers
  - type: Crunchbase
    url: https://www.crunchbase.com/organization/atomico
  - type: LinkedIn
    url: https://www.linkedin.com/company/atomico/
  - type: Twitter
    url: https://twitter.com/atomico
  - type: Features
    data:
      - "Stage: Seed, Series A (Venture VI), Series B to pre-IPO (Growth VI)"
      - "Typical check: growth-stage checks roughly $10M-$50M+"
      - "Sectors: enterprise software, fintech, consumer, health, AI, developer tools, infrastructure, industrial, climate"
      - "Geography: Europe (global scale-up ambition)"
      - "AUM: ~$1.24B latest fundraise (2024); $5B+ raised across seven funds"
      - "Funds: Atomico Growth VI ($754M) + Atomico Venture VI ($485M)"
      - "Founded: 2006"
      - "HQ: London, UK (offices in Paris, Berlin, Stockholm)"
    sources:
      - https://atomico.com/insights/dollar124-billion-as-european-technology-comes-of-age
      - https://en.wikipedia.org/wiki/Atomico
      - https://techcrunch.com/2024/09/08/european-vc-atomico-closes-1-24b-across-two-funds-for-early-and-growth-stage-startups/
    updated: '2026-07-17'
maintainers:
  - FN: Kin Lane
    email: info@apievangelist.com
    url: https://apievangelist.com
  - FN: APIs.json
    url: http://apisjson.org
  - FN: Atomico
    url: https://atomico.com/

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