Venture Capital

Mayfield Fund

Mayfield Fund is an early-stage venture capital firm founded in 1969 and headquartered on Sand Hill Road in Menlo Park, California, with a presence in Mumbai, India. One of the oldest continuously active Silicon Valley firms, Mayfield describes itself as "people first, from inception" and reports that roughly 70% of its investments begin at company inception, positioning it as the first institutional investor for early-stage founders. The firm invests primarily at the Seed, Series A, and Series B stages across artificial intelligence, enterprise software, cloud and cybersecurity infrastructure, semiconductors, consumer and social commerce, and human and planetary health. Mayfield reports approximately $3B in assets under management (and states it has committed $3B to AI investments), has backed more than 550 companies over its history, and counts 120+ IPOs and 225+ M&A exits including Genentech, Lyft, HashiCorp, Poshmark, Marketo, Couchbase, SolarCity, Intuitive Surgical, and Compaq. In 2023 the firm raised $955M across two new funds dedicated to early-stage investing.

143 portfolio companies 143 publish APIs here 14 properties
Venture CapitalEarly StageSeedSeries AArtificial IntelligenceEnterprise SoftwareInfrastructureSemiconductorsSilicon ValleyNorth America
Portfolio Strength across 143 profiled portfolio companies on the network
4 top-rated API companies 0 exemplar · 4 strong
12 agent-ready companies 0 agent-native · 12 agent-ready
Average quality of the book:
Composite emerging 20.0
Agent-Readiness human-only 10.5

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.

Mayfield Fund has 143 portfolio companies tracked on the APIs.io network, of which 143 (100%) publish APIs indexed here.

Its highest-rated API providers on the network are Crunchbase, Citrix, Couchbase, Tibco, Devrev.

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.

Strong 4 Solid coverage with minor gaps
Developing 18 Usable, with meaningful gaps to close
Thin 19 Limited public surface area
Emerging 33 Early or largely undocumented
Minimal 69 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

Source (apis.yml)

apis.yml Raw ↑
aid: mayfield
name: Mayfield Fund
description: >-
  Mayfield Fund is an early-stage venture capital firm founded in 1969 and
  headquartered on Sand Hill Road in Menlo Park, California, with a presence in
  Mumbai, India. One of the oldest continuously active Silicon Valley firms,
  Mayfield describes itself as "people first, from inception" and reports that
  roughly 70% of its investments begin at company inception, positioning it as
  the first institutional investor for early-stage founders. The firm invests
  primarily at the Seed, Series A, and Series B stages across artificial
  intelligence, enterprise software, cloud and cybersecurity infrastructure,
  semiconductors, consumer and social commerce, and human and planetary health.
  Mayfield reports approximately $3B in assets under management (and states it
  has committed $3B to AI investments), has backed more than 550 companies over
  its history, and counts 120+ IPOs and 225+ M&A exits including Genentech,
  Lyft, HashiCorp, Poshmark, Marketo, Couchbase, SolarCity, Intuitive Surgical,
  and Compaq. In 2023 the firm raised $955M across two new funds dedicated to
  early-stage investing.
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://www.mayfield.com/wp-content/uploads/2023/01/mayfield-logo.png
tags:
  - Venture Capital
  - Early Stage
  - Seed
  - Series A
  - Artificial Intelligence
  - Enterprise Software
  - Infrastructure
  - Semiconductors
  - Silicon Valley
  - North America
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.20'
apis: []
common:
  - type: Website
    url: https://www.mayfield.com/
  - type: Portfolio
    url: https://www.mayfield.com/meet-our-founders/
  - type: Portfolio
    url: portfolio/mayfield-portfolio.yml
  - type: Team
    url: https://www.mayfield.com/meet-our-team/
  - type: Team
    url: team/mayfield-team.yml
  - type: InvestmentThesis
    url: https://www.mayfield.com/read-our-perspectives/
  - type: Blog
    url: https://www.mayfield.com/read-our-perspectives/
  - type: News
    url: https://www.mayfield.com/news/
  - type: Newsletter
    url: https://www.mayfield.com/newsletter/
  - type: Podcast
    url: https://www.mayfield.com/cxo-of-the-future/
  - type: Jobs
    url: https://mayfield.getro.com/
  - type: Crunchbase
    url: https://www.crunchbase.com/organization/mayfield-fund
  - type: LinkedIn
    url: https://www.linkedin.com/company/mayfield-fund/
  - type: Twitter
    url: https://twitter.com/mayfieldfund
  - type: Features
    data:
      - 'Stage: Inception, Seed, Series A, Series B'
      - 'Focus: 70% of investments begin at inception'
      - 'Sectors: artificial intelligence, enterprise software, infrastructure, cybersecurity, semiconductors, consumer/social commerce, human & planetary health'
      - 'Geography: United States (Silicon Valley), India (Mumbai)'
      - 'AUM: ~$3B (self-reported); $3B committed to AI investments'
      - '2023 fundraise: $955M across two early-stage funds'
      - 'Track record: 550+ companies, 120+ IPOs, 225+ M&As'
      - 'Founded: 1969'
      - 'HQ: Menlo Park, CA (Sand Hill Road)'
    sources:
      - https://www.mayfield.com/
      - https://en.wikipedia.org/wiki/Mayfield_(company)
      - https://www.businesswire.com/news/home/20230508005525/en/Mayfield-Raises-$955-Million-Across-Two-New-Funds-Dedicated-to-Early-Stage-Investing
    updated: '2026-07-17'
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com
    url: https://apievangelist.com
  - FN: APIs.json
    url: http://apisjson.org
  - FN: Mayfield Fund
    url: https://www.mayfield.com/