Firstbase
Firstbase provides integrated US business formation, compliance, payroll, accounting, and banking services for international entrepreneurs and startups…
Proven Score
Emerging. Ranked #2 of 2 researched vendors in Incorporation & legal docs. Checked 2026-10-21.
Evidence
| Founded | 2019 (7 years) source |
| Market standing | Private company. YC W21; $3M seed (Jul 2021); no valuation found source |
| Clients named by the vendor | 2, of which 1 are public companies or major institutions |
| Clients verified on Proven | 5 (CRM sync or Crossbeam) |
| Trusted networks | 5 investor, bank and government networks (shown, not scored) |
Clients named by the vendor
| Client | Caliber | Source |
|---|---|---|
| AWS (Amazon) | Public company or major institution | vendor page |
| Brex | $1B+ private company or top investor | vendor page |
Discounts for Proven network members
Get Incorporated · $40 value
Firstbase.io handles the incorporation process - paperwork, government registration, compliance, and more.
Use code "PARTNER10" for the Start product to get a 10% discount
Business Insurance · $30 value
Comprehensive protection for your enterprise. Get recommended limits, choose a plan tailored to your business, and build your company with confidence
Registered Agent- Autopilot · $30 value
Automated peace of mind. View all compliance documents and official mail in a centralized dashboard. We eliminate stashed drawers full of loose papers and overdue fees. All your information is at your fingertips as soon as it's available. State mail processing . State compliance reminders . Compliance tracking . Dashboard to manage accounts . State annual reports . State franchise tax filing . Self-serve tax form tool for Form 5472 & Form 1120
See Firstbase deals on Proven Deals
Members redeem through their investor or bank's Proven marketplace. Terms vary by network.
Competitors in Incorporation & legal docs
| Clerky | 46 |
| Firstbase | 32 |
| SixFifty | Score in progress |
| SimpleClosure | Score in progress |
| LAZO | Score in progress |
| Acclime Australia | Score in progress |
| Treeline | Score in progress |
| CSC | Score in progress |
| Hawksford Corporate Services Hong Kong Ltd | Score in progress |
| SeedLegals | Score in progress |
| MarqVision | Score in progress |
| Patlytics | Score in progress |
| Digip | Score in progress |
Source: Proven platform data, public records and vendor websites. Vendors cannot pay to change a score. Methodology. Updated 2026-10-21.