Venture Capital

Addition

Addition is a New York City-based venture capital firm founded in 2020 by Lee Fixel, the former head of Tiger Global Management's private equity business. The firm invests in founder-led, technology-enabled companies across multiple stages, allocating roughly one-third of its capital to early-stage investments and the remainder to growth-stage opportunities. Sectors of focus include software and SaaS, fintech and payments, artificial intelligence and machine learning, developer tools and infrastructure, cybersecurity, consumer, logistics, and clean energy. Typical checks range from about $10M to $200M, with a reported sweet spot near $30M-$50M. Addition operates a streamlined solo-GP model with Fixel as sole managing partner making final investment decisions, enabling fast conviction. Across Addition One through Addition Five (2020-2023) the firm raised roughly $7B-$7.3B in committed capital. Notable investments include Stripe, Snyk, Hugging Face, Chainalysis, Navan, dLocal, Delhivery, Airwallex, Freshworks, Warby Parker, and Lyra Health.

24 portfolio companies 24 publish APIs here 5 properties
Venture CapitalEarly StageGrowth StageFintechArtificial IntelligenceDeveloper ToolsSoftwareNew York
Portfolio Strength across 24 profiled portfolio companies on the network
2 top-rated API companies 1 exemplar · 1 strong
5 agent-ready companies 2 agent-native · 3 agent-ready
Average quality of the book:
Composite emerging 29.9
Agent-Readiness agent-aware 20.0

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.

Addition has 24 portfolio companies tracked on the APIs.io network, of which 24 (100%) publish APIs indexed here.

Its highest-rated API providers on the network are Stripe, Airwallex, Stedi, Groq, dLocal.

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
Stripe 159 APIs 84.7
Strong 1 Solid coverage with minor gaps
Airwallex 14 APIs 64.3
Developing 7 Usable, with meaningful gaps to close
Stedi 21 APIs 50.3 Groq 9 APIs 47.3 dLocal 17 APIs 46.0 Freshworks 44 APIs 44.4 Delhivery 3 APIs 43.3 Alchemy 12 APIs 43.0 Snyk 48 APIs 42.7
Thin 4 Limited public surface area
Navan 7 APIs 41.8 SuperOps 2 APIs 41.1 Snorkel AI 4 APIs 34.4 Chronosphere 33 APIs 31.5
Emerging 4 Early or largely undocumented
Allbirds 1 API 19.6 Adept AI 5 APIs 19.3 Chainalysis 12 APIs 19.0 Base Power 16.4
Minimal 7 Almost no public developer surface
Chapter 11.4 Hugging Face 11.0 Lyra Health 9.8 Warby Parker 8.9 OctoAI 5 APIs 8.5 Xscape Photonics 7.5 Zap Energy 5.5

Properties

Portfolio

Where the firm publishes its investments

Portfolio
Portfolio
 Portfolio
Portfolio

Team

Partners and investing staff

Team
Team

Firm

The firm itself

Website
Website
 Crunchbase
Crunchbase

Source (apis.yml)

apis.yml Raw ↑ 
aid: addition
name: Addition
description: >-
  Addition is a New York City-based venture capital firm founded in 2020 by Lee
  Fixel, the former head of Tiger Global Management's private equity business.
  The firm invests in founder-led, technology-enabled companies across multiple
  stages, allocating roughly one-third of its capital to early-stage
  investments and the remainder to growth-stage opportunities. Sectors of focus
  include software and SaaS, fintech and payments, artificial intelligence and
  machine learning, developer tools and infrastructure, cybersecurity,
  consumer, logistics, and clean energy. Typical checks range from about $10M to
  $200M, with a reported sweet spot near $30M-$50M. Addition operates a
  streamlined solo-GP model with Fixel as sole managing partner making final
  investment decisions, enabling fast conviction. Across Addition One through
  Addition Five (2020-2023) the firm raised roughly $7B-$7.3B in committed
  capital. Notable investments include Stripe, Snyk, Hugging Face, Chainalysis,
  Navan, dLocal, Delhivery, Airwallex, Freshworks, Warby Parker, and Lyra
  Health.
x-type: venture-capital
x-category: Venture Capital
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://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/addition.png
tags:
  - Venture Capital
  - Early Stage
  - Growth Stage
  - Fintech
  - Artificial Intelligence
  - Developer Tools
  - Software
  - New York
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.20'
apis: []
common:
  - type: Website
    url: https://addition.com
  - type: Portfolio
    url: https://addition.com
  - type: Portfolio
    url: portfolio/addition-portfolio.yml
  - type: Crunchbase
    url: https://www.crunchbase.com/organization/addition-7af4
  - type: Team
    url: team/addition-team.yml
  - type: Features
    data:
      - 'Stage: Early stage and growth stage (multi-stage)'
      - 'Typical check: ~$10M-$200M (sweet spot ~$30M-$50M)'
      - 'Sectors: software/SaaS, fintech, AI/ML, developer tools, cybersecurity, consumer, logistics, clean energy'
      - 'Geography: United States and global'
      - 'Committed capital: ~$7B-$7.3B across five funds (2020-2023)'
      - 'Founded: 2020'
      - 'HQ: New York City, NY (Park Avenue Tower)'
      - 'Founder / sole managing partner: Lee Fixel (ex-Tiger Global)'
    sources:
      - https://en.wikipedia.org/wiki/Addition_(investment_firm)
      - https://www.crunchbase.com/organization/addition-7af4
      - https://techcrunch.com/2023/06/14/lee-fixel-addition-fund/
    updated: '2026-07-17'
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com
    url: https://apievangelist.com
  - FN: APIs.json
    url: http://apisjson.org
  - FN: Addition
    url: https://addition.com