Firstbase.io

Firstbase.io operates a software platform that handles the formation and ongoing back-office administration of US companies. Its core formation product lets founders register an LLC or C-Corp through an automated workflow, and is complemented by modules for compliance, accounting, tax filing and business mail. The company positions the offering as a single "startup operating system" intended to replace multiple separate vendors and manual paperwork.

The product line includes Firstbase Start (LLC or C-Corp formation), Mailroom (a premium physical US address and virtual mailbox), Agent (registered agent services, franchise tax and annual report filings across states), Accounting (a bookkeeping platform with full-service accrual bookkeeping and accrual-basis financial statements), Tax Filing (state and federal corporate and personal returns for both US-based and international founders), plus Loop, Payroll, Sales Tax and an Incorporation API. Firstbase One bundles the accounting, compliance, virtual address and tax products into one package, marketed with a stated saving of $1,950 versus separate purchases. Post-formation tooling includes equity assignment with one-click cap table creation in Carta and 83(b) filing.

Alongside the paid products, Firstbase offers a rewards and perks marketplace stated to be worth up to $350,000, including a banking marketplace for US bank account approval, waived Stripe processing fees on a customer's first $20,000 in transactions, and up to $6,000 in law firm credits. The company also publishes free founder resources such as a VC database, incorporation checklist, compliance guide, business name check and various generators.

Business model

Firstbase sells company formation and recurring back-office services directly to founders. Individual products (formation, registered agent, mailbox, accounting, payroll, sales tax, tax filing) are sold separately or bundled as Firstbase One, and an Incorporation API is offered for programmatic use. A promotional offer waives the formation fee so customers pay only the state fee.

Product and subscription fees for incorporation, registered agent and compliance filings, virtual address/mailroom, bookkeeping, payroll and tax filing services, with a bundled package (Firstbase One) advertised at a discount to the sum of individual products.

Traction

The company reports more than 30,000 companies started through its platform, customers in 191 countries, and roughly $3 billion in aggregate funding raised by its customers.