Kiln-AI/Kiln

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

5034 stars · 375 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Kiln is a free desktop app and MIT-licensed Python library for the full AI development loop: evals, prompt optimization, RAG, agents, fine-tuning, synthetic data generation, and MCP tooling. It emphasizes team collaboration with git-based dataset versioning and lets non-engineers rate outputs and contribute data without code.

Use cases

• evaluate llm output quality with llm-as-judge evals
• build a rag pipeline over my pdf documents
• auto-optimize prompts against evals
• fine-tune a smaller model from gpt-4o outputs
• generate synthetic training data for fine-tuning
• build multi-agent systems with subagents and mcp tools
• collaborate with PMs and QA on rating ai outputs
• run ai models locally offline with ollama

When to choose

• you need an end-to-end workbench covering evals, RAG, agents, and fine-tuning in one tool
• non-technical teammates (PMs, QA, domain experts) must contribute ratings and datasets
• you want eval-driven prompt optimization or model comparison with cost/latency data
• you want local-first datasets versioned in git with no vendor lock-in

When to avoid

• you only need a lightweight programmatic library without a desktop app
• you require a fully permissive license for the app itself (the app is source-available, only the Python library is MIT)
• you need heavy custom infrastructure-level orchestration beyond Kiln's abstractions
• you depend on Kiln Pro features but cannot use hosted services

Facets

application · maturity active

machine-learning rag agent-framework prompt-engineering llm-training data-generation mcp chatbot developer-tools artificial-intelligence machine-learning large-language-models developer-tools data-science windows python cross-platform evals fine-tuning synthetic-data llm-as-judge prompt-optimization dataset-management collaboration desktop-app ollama rlhf ai-agents retrieval-augmented-generation macos linux desktop

Member repositories

For agents

markdown · JSON · MCP: product_card(name="Kiln-AI/Kiln")