Mercury was founded in 2019 to solve a specific problem: legacy banks were too slow, too fee-heavy, and too disconnected from the way modern digital businesses actually operate. The platform built a software layer on top of FDIC-insured partner banks to deliver business banking that feels like a product rather than a compliance exercise.
The core offering is free business checking and savings with no monthly fees, no minimum balance, and no overdraft charges. Wire transfers in USD — both domestic and international — are free. This is unusual. Most business banking platforms charge $15 to $35 per outbound wire. For businesses paying overseas contractors or suppliers regularly, this alone justifies opening an account.
FDIC coverage extends to $5 million through a sweep network that distributes deposits across multiple partner institutions. The standard single-bank limit is $250,000, so this is a meaningful advantage for any business holding significant cash.
The developer API is a genuine differentiator. Unlike most business banks where API is an enterprise add-on, Mercury includes read-write access on all accounts. This lets finance and engineering teams build custom dashboards, automate bulk payments, and reconcile transactions without manual data exports.
In December 2025 Mercury applied for its own national bank charter, signalling a shift toward direct regulatory oversight rather than relying entirely on partner institutions. That process is ongoing as of April 2026.
The paid plans starting at $35/mo add advanced invoicing workflows, NetSuite enriched automations, and expense reimbursement for teams with more than five active users. Most early-stage businesses will not need these features.