OpenAccountants is an open platform that creates a trust layer for AI systems handling tax and accounting. Licensed accountants worldwide collaboratively write, review, and attest to source-cited Guides that AI agents can read and follow. Users can browse existing guides, build new ones with AI assistance, and integrate them into their own AI applications in minutes. The project aims to prevent AI from guessing on complex regulatory topics by grounding it in verified professional knowledge across multiple countries.
In the Business & Operations space, OpenAccountants takes a focused approach. It focuses on ensuring AI systems have accurate, verified tax and accounting knowledge instead of guessing or hallucinating rules. OpenAccountants is a B2B product aimed at AI developers and accountants. OpenAccountants costs nothing to use. OpenAccountants is available on the web.
Behind OpenAccountants is OpenAccountants, and the product first shipped in 2026. The project is developed in the open on GitHub with 270 stars and 180 commits in the last 90 days. Among its 5 catalogued features are Tax Guides, Accountant Attestation, and AI Integration. It exposes integrations via a public API.
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