20 open-source agents tracked · Ranked by trust score · Updated 2026-05-30 20:03 UTC
HVTracker independently evaluates 20 open-source memory & knowledge using daily signals from GitHub, package registries, and security databases. Each agent is scored on activity, adoption, transparency, safety, and identity. The top-ranked memory & knowledge is LanceDB with a trust score of 87.1/100 (Grade B). Other leading projects include Vespa and Open WebUI.
| # | Agent | Trust | Stars | Language |
|---|---|---|---|---|
| 1 | LanceDB B Developer-friendly OSS embedded retrieval library for multimodal AI. Search More; Manage Less. | 87.1 | 10.4k | HTML |
| 2 | Vespa B The AI search platform | 86.1 | 6.9k | Java |
| 3 | Open WebUI B User-friendly AI Interface (Supports Ollama, OpenAI API, ...) | 86.0 | 139.3k | Python |
| 4 | Mem0 B Universal memory layer for AI Agents | 85.9 | 57.1k | Python |
| 5 | Graphiti C Build Real-Time Knowledge Graphs for AI Agents | 78.7 | 26.7k | Python |
| 6 | Weaviate B Weaviate is an open-source vector database that stores both objects and vectors, allowing for the combination of vector | 72.1 | 16.3k | Go |
| 7 | Qdrant B Qdrant - High-performance, massive-scale Vector Database and Vector Search Engine for the next generation of AI. Also av | 70.4 | 31.7k | Rust |
| 8 | Milvus B Milvus is a high-performance, cloud-native vector database built for scalable vector ANN search | 68.5 | 44.5k | Go |
| 9 | Chroma B Search infrastructure for AI | 68.5 | 28.1k | Rust |
| 10 | RAGFlow C RAGFlow is a leading open-source Retrieval-Augmented Generation (RAG) engine that fuses cutting-edge RAG with Agent capa | 68.3 | 81.6k | Python |
| 11 | LibreChat C Enhanced ChatGPT Clone: Features Agents, MCP, DeepSeek, Anthropic, AWS, OpenAI, Responses API, Azure, Groq, o1, GPT-5, M | 67.4 | 37.7k | TypeScript |
| 12 | Cognee C Memory control plane for AI Agents in 6 lines of code | 65.3 | 17.6k | Python |
| 13 | Khoj B Your AI second brain. Self-hostable. Get answers from the web or your docs. Build custom agents, schedule automations, d | 64.7 | 34.8k | Python |
| 14 | txtai B 💡 All-in-one AI framework for semantic search, LLM orchestration and language model workflows | 59.3 | 12.6k | Python |
| 15 | Letta B Letta is the platform for building stateful agents: AI with advanced memory that can learn and self-improve over time. | 52.6 | 23.0k | Python |
| 16 | pgvector C Open-source vector similarity search for Postgres | 52.2 | 21.5k | C |
| 17 | AnythingLLM C The all-in-one AI productivity accelerator. On device and privacy first with no annoying setup or configuration. | 47.0 | 60.8k | JavaScript |
| 18 | PrivateGPT C Interact with your documents using the power of GPT, 100% privately, no data leaks | 45.6 | 57.2k | Python |
| 19 | Quivr C Opiniated RAG for integrating GenAI in your apps 🧠 Focus on your product rather than the RAG. Easy integration in exis | 43.7 | 39.2k | Python |
| 20 | Leon D 🧠 Leon is your open-source personal assistant. | 42.1 | 17.3k | TypeScript |