langchain alternatives

langchain-ai/langchain (148k stars, +161 this week): The agent engineering platform. Why it matters: useful plumbing for shipping LLM-powered features.

Below are 12 other LLM tooling repos tracked by OSS Radar that share at least two GitHub topics with langchain, ordered by how many topics overlap, then by stars gained in the last 7 days. Topic overlap means a similar problem space, not a drop-in replacement, so check each project's README.

1. 1. langchain-ai/langgraph

   +119/wkest.

   Build resilient agents. Why it matters: useful plumbing for shipping LLM-powered features.

   43k stars · Python · shared topics: agents, ai, ai-agents, chatgpt, deepagents, enterprise, framework, gemini, generative-ai, langchain, langgraph, llm, multiagent, open-source, openai, pydantic, python, rag

2. 2. headroomlabs-ai/headroom

   +266/wkest.

   Compress tool outputs, logs, files, and RAG chunks before they reach the LLM. Why it matters: useful plumbing for shipping LLM-powered features.

   75k stars · Python · shared topics: ai, anthropic, langchain, llm, openai, python, rag, typescript

3. 3. asgeirtj/system_prompts_leaks

   +77/wkest.

   Documented system prompts from Anthropic - Claude Fable 5.1, Opus 5.5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Why it matters: useful plumbing for shipping LLM-powered features.

   70k stars · Python · shared topics: ai, ai-agents, anthropic, chatgpt, gemini, generative-ai, llm, openai

4. 4. rohitg00/ai-engineering-from-scratch

   +889/wkest.

   Learn AI Engineering! Learn it. Build it. Ship it for others. Why it matters: useful plumbing for shipping LLM-powered features.

   69k stars · Python · shared topics: agents, ai, ai-agents, generative-ai, llm, python, typescript

5. 5. f/prompts.chat

   +154/wkest.

   f.k.a. Awesome ChatGPT Prompts. Share, discover, and collect prompts from the community. Why it matters: useful plumbing for shipping LLM-powered features.

   173k stars · HTML · shared topics: ai, chatgpt, gemini, llm, open-source, openai, typescript

6. 6. code-yeongyu/oh-my-openagent

   +63/wkest.

   OmO: Just type "mass ulw" keyword with your prompt. Now you are the master of graph engineering. Why it matters: useful plumbing for shipping LLM-powered features.

   70k stars · TypeScript · shared topics: ai, ai-agents, anthropic, chatgpt, gemini, openai, typescript

7. 7. mem0ai/mem0

   +56/wkest.

   The Memory Layer for AI Agents - Drop-in memory infrastructure for AI agents and apps. Context that persists. Built for production. Why it matters: useful plumbing for shipping LLM-powered features.

   67k stars · Python · shared topics: agents, ai, ai-agents, chatgpt, llm, python, rag

8. 8. NousResearch/hermes-agent

   +539/wkest.

   The agent that grows with you. Why it matters: useful plumbing for shipping LLM-powered features.

   254k stars · Python · shared topics: ai, ai-agents, anthropic, chatgpt, llm, openai

9. 9. unclecode/crawl4ai

   +140/wkest.

   Open-source web crawler and scraper for LLMs and AI agents: any website into clean, LLM-ready Markdown. Why it matters: useful plumbing for shipping LLM-powered features.

   85k stars · Python · shared topics: ai, ai-agents, llm, open-source, python, rag

10. 10. trailhq/Trail-Code

    +119/wkest.

    Turbocharge Claude Code, Cursor, Codex, Gemini & every coding agent: faster, cheaper, with contextual understanding specific to your… Why it matters: useful plumbing for shipping LLM-powered features.

    10k stars · TypeScript · shared topics: ai-agents, anthropic, gemini, llm, open-source, openai

11. 11. AstrBotDevs/AstrBot

    +98/wkest.

    AI Agent Assistant & development framework that integrates lots of IM platforms, LLMs, plugins and AI feature, and can be your openclaw… Why it matters: useful plumbing for shipping LLM-powered features.

    42k stars · Python · shared topics: ai, chatgpt, gemini, llm, openai, python

12. 12. lidge-jun/opencodex

    +84/wkest.

    Universal provider proxy for OpenAI Codex & Claude Code — use any LLM (Claude, Gemini, Grok, DeepSeek, Ollama…) with Codex CLI, App, SDK… Why it matters: useful plumbing for shipping LLM-powered features.

    17k stars · TypeScript · shared topics: anthropic, chatgpt, gemini, llm, openai, typescript

More: all trending LLM tooling repos · compare langchain with the top 2