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AX

Ax

DSPy-inspired framework for building typed LLM programs

Self-Hosted AI ★ 3k stars Medium setup Apache-2.0

Ax is a TypeScript framework for building reliable LLM applications using signatures, automatic prompt optimization and agents. It can be self-embedded into Node applications and works with many model providers.

Official siteSource code

Key features

  • Typed LLM signatures
  • Automatic prompt tuning
  • Agent support
  • Multi-provider

Strengths

  • Released under the Apache-2.0 license
  • Active community (3k GitHub stars)
  • Written in TypeScript
  • Tiny footprint — runs in 256 MB RAM

Is Ax secure?

OSV.dev has no published security advisories for Ax's repository. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

Source: OSV.dev, checked 2026-10-14. How this is measured.

Ax replaces

Self-hosted DSPy alternatives

Health badge

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SelfHostIndex: 87 · excellent

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