Lean alternatives
Tools that could take the place of Lean, ranked by the stacks builders put them in rather than by stars alone.
Other frameworks in the runchr registry that do the work of Lean — a tool somebody pairs with it ranks above a more popular stranger. Read the Lean page or browse every frameworks.
Open-source commerce platform and framework for building custom e-commerce apps.
Open source platform to trace, evaluate, and monitor LLM apps and agents.
Open-source headless commerce platform with REST APIs, SDKs, and agent tooling.
Application framework for vertical AI SaaS: auth, billing, credits
Agent meta-harness for Claude Code and Codex with swarms and memory
Lightweight self-hosted Python framework for building personal AI agents.
Platform to programmatically author, schedule, and monitor workflows as code.
Python framework for building quantitative trading and AI factor strategies.
Automates building, testing, and releasing iOS and Android apps.
Python library that guarantees structured LLM outputs via types and schemas.
Build production AI agents and multi-agent workflows in Python and .NET.
Meta-harness orchestrating Claude Code, Codex, Cursor and custom agents.