Incorporation, compliance, bookkeeping, and taxes for US startups — in one place.
Firstbase is a founder-focused platform for starting and running a US business from abroad or at home. It automates LLC and C-Corporation formation, then supports ongoing operations: registered agent and multi-state compliance (Agent), a premium US business address and virtual mailbox (Mailroom), accrual bookkeeping with books closed on a schedule (Accounting), and corporate or personal tax filing for US-based and international founders. Firstbase One bundles core back-office pieces so teams can replace a patchwork of vendors with one operating system from incorporation through tax season.
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