Tanso Core: Open-Source Monetization Engine for B2B AI Products Launched

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A team has open-sourced Tanso Core, a self-hosted monetization engine built on Spring Boot and designed specifically for B2B AI products. The platform combines usage metering, prepaid credits, entitlements, and Stripe billing in a single service, while also recording inference costs alongside billing data for each event. This allows developers to calculate margin per customer, per feature, or per model directly from the system rather than reconstructing figures in spreadsheets. Unlike existing billing platforms or LLM observability tools, Tanso keeps both revenue and cost data in one ledger, enabling real-time enforcement of credit limits and usage caps at the point of ingestion. The project is released under the AGPL-3.0 license and is available on GitHub at tansohq/tanso-oss.

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