Finno

Finno overview

About Finno Finno is a self-hosted revenue infrastructure platform for API businesses. It unifies proxying, usage metering, billing, and double-entry accounting in one atomic flow. Unlike typical API gateways, Finno is the financial layer where digital consumption becomes accountable revenue — built into infrastructure, not stitched together after the fact. In traditional architectures, requests are served, events are emitted, and billing runs hours or days later. A structural gap between service delivery and accounting leads to lost revenue, financial disputes, and reconciliation teams. Finno closes that gap: every API request is charged and recorded before the response returns. Finno is built for organizations whose product is API consumption — from AI and LLM platforms and API resellers to usage-based SaaS and marketplaces. Instead of gateway + Kafka + Stripe + custom billing + a reconciliation team, you deploy one product on your own infrastructure. Written in Rust, Finno runs as a 3–5 node Raft-replicated cluster with sub-300ms automatic failover and under 250µs system overhead per request. Three billing models — quota, prepaid wallet, and postpaid credit — can coexist on a single API key. A double-entry ledger with six accounts (Float, Receivable, Wallet, Owed, Deferred Revenue, Revenue) enforces balance after every command. Finno supports full self-hosting and air-gapped deployment on AWS, GCP, Azure, or on-prem data centers — with built-in financial reports, Stripe integration, and an extensible payment gateway interface for regional markets.

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