aid: 01-advisors
name: 01 Advisors
description: '01 Advisors (01A) is an early-growth venture capital and advisory firm
  founded in 2018 by former Twitter CEO Dick Costolo and former Twitter COO Adam Bain,
  with former Facebook Chief Revenue Officer David Fischer as a third general partner.
  Headquartered in San Francisco with a New York office, the firm positions itself
  as "venture coaches" that deliberately avoid taking board seats, focusing on Series
  B companies with product-market fit that need help building professional sales organizations
  and revenue operations. It manages roughly $920M across multiple funds. Added to
  the API Evangelist network as a venture-capital portfolio lead surfaced via foundry-group;
  the firm runs a corporate marketing website (Squarespace) and publishes no public
  API, developer portal, or machine-readable surface.'
url: https://raw.githubusercontent.com/api-evangelist/01-advisors/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- foundry-group
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-17'
image: https://static1.squarespace.com/static/5d7687bc1df12933dc7edbc6/t/6601aefcde16691387cd6fa3/1765839789329/01A_Main_Logo_Black.png?format=1500w
tags:
- Company
- Venture Capital
- Venture Firm
- Investor
- Startups
- Series B
- San Francisco
- New York
- Advisory
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/01-advisors-domain-security.yml
- type: Website
  url: https://01a.com
- type: About
  url: https://01a.com/about
- type: Portfolio
  url: https://01a.com/featured
- type: Careers
  url: https://jobs.01a.com
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence