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Top 23 Python langchain Projects
- Project mention: Agents 101 — Build and Deploy AI Agents to Production using LangChain | dev.to | 2025-11-25
LangChain makes this possible. It offers a framework that blends language models, Python functions, prompts, and memory into a single workflow.
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
- Project mention: Show HN: MarkdownConverters – Convert any file format to clean Markdown | news.ycombinator.com | 2025-10-20
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litellm
Python SDK, Proxy Server (AI Gateway) to call 100+ LLM APIs in OpenAI (or native) format, with cost tracking, guardrails, loadbalancing and logging. [Bedrock, Azure, OpenAI, VertexAI, Cohere, Anthropic, Sagemaker, HuggingFace, VLLM, NVIDIA NIM]
[BerriAI/litellm]: LiteLLM - A simple library to call any LLM API
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deer-flow
DeerFlow is a community-driven Deep Research framework, combining language models with tools like web search, crawling, and Python execution, while contributing back to the open-source community.
View the Project on GitHub
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opik
Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.
Project mention: Opik Agent Optimizer – Open-Source Prompt Optimization Framework | news.ycombinator.com | 2025-12-14 -
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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swarms
The Enterprise-Grade Production-Ready Multi-Agent Orchestration Framework. Website: https://swarms.ai
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agentops
Python SDK for AI agent monitoring, LLM cost tracking, benchmarking, and more. Integrates with most LLMs and agent frameworks including CrewAI, Agno, OpenAI Agents SDK, Langchain, Autogen, AG2, and CamelAI
Project mention: Tune self-correct SQL agent with RL: AgentLightning+verl+vLLM+AgentOps+LangGraph | news.ycombinator.com | 2025-08-11- AgentOps for collecting training data (telemetry): https://github.com/AgentOps-AI/agentops
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LEANN
RAG on Everything with LEANN. Enjoy 97% storage savings while running a fast, accurate, and 100% private RAG application on your personal device.
Project mention: First lightweight local semantic search MCP for Claude Code | news.ycombinator.com | 2025-08-15@Berkeley SkyLab, we’re the first to bring semantic search to Claude Code with a fully local index in a novel, lightweight structure — check it out at LEANN(https://github.com/yichuan-w/LEANN).
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argilla
Argilla is a collaboration tool for AI engineers and domain experts to build high-quality datasets
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- Project mention: LazyLLM, Easiest and laziest way for building multi-agent LLMs applications | news.ycombinator.com | 2025-11-05
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Ask-Anything
[CVPR2024 Highlight][VideoChatGPT] ChatGPT with video understanding! And many more supported LMs such as miniGPT4, StableLM, and MOSS.
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InternGPT
InternGPT (iGPT) is an open source demo platform where you can easily showcase your AI models. Now it supports DragGAN, ChatGPT, ImageBind, multimodal chat like GPT-4, SAM, interactive image editing, etc. Try it at igpt.opengvlab.com (支持DragGAN、ChatGPT、ImageBind、SAM的在线Demo系统)
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api-for-open-llm
Openai style api for open large language models, using LLMs just as chatgpt! Support for LLaMA, LLaMA-2, BLOOM, Falcon, Baichuan, Qwen, Xverse, SqlCoder, CodeLLaMA, ChatGLM, ChatGLM2, ChatGLM3 etc. 开源大模型的统一后端接口
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RasaGPT
💬 RasaGPT is the first headless LLM chatbot platform built on top of Rasa and Langchain. Built w/ Rasa, FastAPI, Langchain, LlamaIndex, SQLModel, pgvector, ngrok, telegram
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openlit
Open source platform for AI Engineering: OpenTelemetry-native LLM Observability, GPU Monitoring, Guardrails, Evaluations, Prompt Management, Vault, Playground. 🚀💻 Integrates with 50+ LLM Providers, VectorDBs, Agent Frameworks and GPUs.
OpenLIT is an OpenTelemetry-native observability tool built for AI Engineering and LLM applications. It focuses on easy, vendor-neutral instrumentation for LLMs, vector databases, and other AI stack components. OpenLIT is ideal for teams already heavily invested in OpenTelemetry and GPU monitoring but offers fewer features for LLM prompt evaluation and experimentation.
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DemoGPT
🤖 Everything you need to create an LLM Agent—tools, prompts, frameworks, and models—all in one place.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).
Python langchain discussion
Python langchain related posts
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Opik Agent Optimizer – Open-Source Prompt Optimization Framework
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MemState – transactional memory for AI agents (SQL and vector DB)
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Agents 101 — Build and Deploy AI Agents to Production using LangChain
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LazyLLM, Easiest and laziest way for building multi-agent LLMs applications
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All Data and AI Weekly #210: 6 Oct 2025
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Local-deepthink – perform ultra long thinking using a society of agents (QNN)
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A new RAG algorithm to self-heal damaged datasets and query them on a graph
- A note from our sponsor - InfluxDB www.influxdata.com | 22 Dec 2025
Index
What are some of the best open-source langchain projects in Python? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | langchain | 122,246 |
| 2 | markitdown | 84,406 |
| 3 | litellm | 32,631 |
| 4 | deer-flow | 18,761 |
| 5 | opik | 16,821 |
| 6 | awesome-chatgpt-zh | 11,361 |
| 7 | chainlit | 11,211 |
| 8 | GPTCache | 7,876 |
| 9 | swarms | 5,504 |
| 10 | TaskingAI | 5,352 |
| 11 | agentops | 5,133 |
| 12 | LEANN | 5,028 |
| 13 | argilla | 4,786 |
| 14 | codeinterpreter-api | 3,858 |
| 15 | LazyLLM | 3,577 |
| 16 | Ask-Anything | 3,328 |
| 17 | InternGPT | 3,219 |
| 18 | api-for-open-llm | 2,456 |
| 19 | RasaGPT | 2,447 |
| 20 | autolabel | 2,295 |
| 21 | openlit | 2,107 |
| 22 | DemoGPT | 1,880 |
| 23 | Chrome-GPT | 1,749 |
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InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
www.influxdata.com