ISON is an open-source, token-efficient data format designed for AI and LLM workflows. It reduces token usage compared to JSON, making it ideal for RAG pipelines, multi-agent systems, and cost-effective AI integrations. ISON is supported in multiple languages and is aimed at AI developers and data engineers.
ISON is an Infrastructure & Backend product. It reduces token usage and increases context efficiency for AI and LLM workflows by providing a compact data format. It is built as an open-source project for AI developers and data engineers. ISON is open source under the MIT license. The product ships for the command line and API.
Behind ISON is ISON-format community, and the product first shipped in 2025. Development happens publicly on GitHub with 126 stars and 5 commits in the last 90 days. Key capabilities include token-efficient format, JSON alternative, and multi-language support.
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