aid: firstbase
name: Firstbase
description: >-
  Firstbase is an all-in-one startup operating system that helps founders form,
  run, and grow a US business from anywhere in the world. Its products cover
  incorporation (Firstbase Start for LLCs and C-Corps in Delaware, Wyoming, New
  York, Texas and more), ongoing compliance and registered-agent services
  (Firstbase Agent), bookkeeping, invoicing and tax-ready financials (Firstbase
  Accounting), tax filing, and a virtual business address (Firstbase Mailroom).
  Firstbase markets an embedded "Incorporation API" for platforms that want to
  offer company formation to their own users, but publishes no public developer
  documentation, OpenAPI specification, or self-serve developer portal for it.
  Firstbase is a venture-backed company (a16z portfolio) added to the API
  Evangelist network and enriched from its public web surface.
url: https://raw.githubusercontent.com/api-evangelist/firstbase/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
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: '2026-07-19'
tags:
- Company
- Incorporation
- Company Formation
- Compliance
- Accounting
- Bookkeeping
- Taxes
- Registered Agent
- Startups
- Fintech
image: https://cdn.prod.website-files.com/609486d2fafa37698a57db5b/66fc614f8036f0625a063de1_Hero-new.png
apis: []
common:
- type: Website
  url: https://www.firstbase.io/
- type: GettingStarted
  url: https://www.firstbase.io/guide
- type: Support
  url: https://help.firstbase.io/hc
- type: HelpCenter
  url: https://help.firstbase.io/hc
- type: Blog
  url: https://www.firstbase.io/blog
- type: Pricing
  url: https://www.firstbase.io/pricing
- type: SignUp
  url: https://onboarding.firstbase.io/
- type: Login
  url: https://app.firstbase.io/
- type: TermsOfService
  url: https://www.firstbase.io/terms
- type: PrivacyPolicy
  url: https://www.firstbase.io/privacy-policy
- type: StatusPage
  url: https://status.firstbase.io/
- type: Lifecycle
  url: lifecycle/firstbase-lifecycle.yml
- type: DomainSecurity
  url: security/firstbase-domain-security.yml
- type: LLMsTxt
  url: llms/firstbase-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence