Long-term memory layers for AI agents — vector stores, episodic recall, semantic compression, and persistent context across sessions.
Agent Memory tools are AI-powered software designed to help developers and teams tackle agent memory-related tasks more efficiently. These tools are typically published as open-source projects on GitHub and can be integrated into existing workflows via MCP (Model Context Protocol), Claude Skills, or standalone agent frameworks. On Agent Skills Hub, we index 30 quality-scored agent memory tools across languages including Python, Go, JavaScript.
In 2026, the AI agent ecosystem is maturing rapidly. Agent Memory tools can significantly boost development efficiency by automating repetitive tasks, reducing human error, and providing intelligent suggestions. The top 3 tools — mem0, letta, mcp-memory-service — have earned an average of 4,171 GitHub stars, reflecting strong community validation. 26 of the listed tools come with clear open-source licenses, ensuring freedom to use and modify.
When choosing a agent memory tool, consider these factors: 1) Community activity — GitHub stars and recent commit frequency indicate reliability; 2) Integration method — check if it supports MCP, Claude, or your preferred agent framework; 3) Language compatibility — the most common language in this list is Python; 4) Quality score — Agent Skills Hub's composite score evaluates code quality, documentation completeness, and maintenance activity. Our recommendation: start with mem0 — it ranks highest in both star count and quality score.
Platform for stateful agents: AI with advanced memory that can learn and self-improve over time.
Open-source persistent memory for AI agent pipelines (LangGraph, CrewAI, AutoGen) and Claude. REST API + knowledge graph + autonomous consolidation.
Coding agent skill for Tensorlake. Routes Claude Code, OpenAI Codex, and other AI agents to live Tensorlake docs for sandboxes, orchestration, and SDK usage.
A lightweight, rollbackable, and visual Long-Term Memory Server for MCP Agents. Say goodbye to Vector RAG and amnesia. Empower your AI with persistent, graph-like structured memory across any model, session, or tool. Drop-in replacement for OpenClaw.
LLM-supervised persistent memory for AI agents — graph-based recall, cross-session knowledge, single binary. Works with Claude Code, OpenClaw, and any CLI agent.
Structural memory for AI coding agents. Bi-temporal graph, MCP-native, zero LLM calls. Cursor · Claude Code · Codex · Hermes · VS Code · Windsurf.
Make AI actually work for you - A personal agent that writes its own tools and repairs itself.
Open-source cognitive coprocessor with active memory for AI agents. Persistent recall, semantic search, trajectory learning, overnight consolidation. Works with any LLM.
Xmem is a India's First open source multi-modal, multi-agentic long‑term memory layer for AI agents.
The memory your AI should have had from the start. Automatic capture, automatic recall, 100% local. One SQLite file, zero cloud. Works with Claude Code, Claude CLI, Cursor, Codex CLI, Gemini CLI.
MCP server with persistent memory + FTS5 search for Claude Code conversation history. Index your ~/.claude/projects/, expose 10 MCP tools, browse via web UI. MIT-licensed.
Human-like memory for AI agents — semantic, episodic & procedural. Experience-driven procedures that learn from failures. Free API, Python & JS SDKs, LangChain, CrewAI & OpenClaw integrations.
One portable memory layer for every AI agent: local-first, Markdown-native, user-owned, and self-evolving across apps, tools, and workflows.
TeleMem is a high-performance drop-in replacement for Mem0, featuring semantic deduplication, long-term dialogue memory, and multimodal video reasoning.
✨ mem0 MCP Server: A memory system using mem0 for AI applications with model context protocl (MCP) integration. Enables long-term memory for AI agents as a drop-in MCP server.
Local-first AI memory you can see, edit, and override — portable across Claude Code, Codex, Cursor, Windsurf, and other MCP coding tools.
TencentDB Agent Memory delivers fully local long-term memory for AI Agents via a 4-tier progressive pipeline, with zero external API dependencies.
TencentDB Agent Memory delivers fully local long-term memory for AI Agents via a 4-tier progressive pipeline, with zero external API dependencies.
MCP memory server for AI coding assistants. Works with Claude Code, Cursor, Codex, Gemini CLI, Cline, Continue, Cherry Studio, Zed, Hermes, OpenClaw, and any MCP client. Local, encrypted, verbatim recall. MIT.
Agentic AI memory with Ebbinghaus forgetting curve decay. +16pp better recall than Mem0 on LoCoMo.
The best-benchmarked open-source memory system for AI coding assistants
Durable, file-based long-term memory for AI agents. Five-package plugin family: SDK, CLI, MCP server, Hermes adapter, and a LangGraph BaseStore. No vector database, no embeddings.
A memory OS that makes your OpenClaw agents more personal while saving tokens.
Neo.mjs is a self-evolving software organism: a professional end-to-end AI engineering team whose cross-model swarm inhabits live apps via Neural Link, Active Hybrid GraphRAG, DreamService, and self-healing loops.
A persistent, unified memory layer for all your AI agents (e.g. Claude Code, Codex), backed by Markdown and Milvus.
User Profile-Based Long-Term Memory for AI Chatbot Applications.
Local-first persistent agentic memory powered by Recursive Memory Harness (RMH). Open source must win.
Own your AI memory — import ChatGPT, Claude and Gemini exports, see what each AI knows about you. Checkpoint/restore and cross-model continuity for agents.
| Tool | Stars | Language | License | Score |
|---|---|---|---|---|
| mem0 | ★ 60.4k | Python | Apache-2.0 | 78 |
| letta | ★ 23.6k | Python | Apache-2.0 | 81 |
| mcp-memory-service | ★ 1.9k | Python | Apache-2.0 | 66 |
| tensorlake-skills | ★ 176 | Python | MIT | 68 |
| nocturne_memory | ★ 1.2k | Python | MIT | 72 |
| mnemon | ★ 371 | Go | Apache-2.0 | 66 |
| memtrace-public | ★ 219 | Python | — | 62 |
| Agenvoy | ★ 234 | Go | Apache-2.0 | 68 |
| mnemo-cortex | ★ 142 | Python | MIT | 64 |
| XMem | ★ 228 | Python | BSD-3-Clause | 52 |
| TrueMemory | ★ 358 | Python | AGPL-3.0 | 66 |
| claudex | ★ 90 | JavaScript | MIT | 63 |
| mengram | ★ 178 | Python | Apache-2.0 | 60 |
| EverOS | ★ 10.5k | Python | Apache-2.0 | 80 |
| telemem | ★ 470 | Python | Apache-2.0 | 65 |
| mem0-mcp | ★ 97 | TypeScript | MIT | 76 |
| piia-engram | ★ 170 | Python | AGPL-3.0 | 68 |
| TencentDB-Agent-Memory | ★ 6.2k | TypeScript | — | 83 |
| TencentDB-Agent-Memory | ★ 4.5k | TypeScript | — | 69 |
| iai-personal-memory-engine | ★ 325 | Python | MIT | 73 |
| YourMemory | ★ 251 | Python | — | 63 |
| iai-mcp | ★ 119 | Python | MIT | 69 |
| Sibyl-Memory | ★ 91 | Python | MIT | 63 |
| EverMemOS | ★ 3.5k | Python | Apache-2.0 | 69 |
| neo | ★ 3.2k | JavaScript | MIT | 68 |
| memsearch | ★ 2.2k | Python | MIT | 76 |
| memobase | ★ 2.8k | Python | Apache-2.0 | 56 |
| LycheeMem | ★ 1.1k | Python | Apache-2.0 | 63 |
| Ori-Mnemos | ★ 311 | TypeScript | Apache-2.0 | 63 |
| agentkeeper | ★ 119 | Python | MIT | 68 |
The top agent memory tools in 2026 are mem0, letta, mcp-memory-service. Agent Skills Hub ranks 30 options by GitHub stars, quality score (6 dimensions including completeness, examples, and agent readiness), and recent activity. The list is rebuilt every 8 hours from live GitHub data.
mem0 (60.4k stars) is the most adopted choice for general agent memory workflows, written in Python. letta (23.6k stars) is a strong alternative. Pick by your existing stack: match the language and runtime your team already uses to minimize integration cost. If unsure, start with mem0 — it has the deepest community and the most examples online.
Avoid pre-built agent memory tools when (1) your use case requires deep customization that the tool's plugin system doesn't support, (2) you have strict compliance requirements that ban third-party dependencies, (3) the tool's maintenance is inactive (last commit >6 months ago), or (4) your data volume is small enough that a 50-line custom script is cheaper than learning the tool. For most production workflows above 100 requests/day, the time savings from a maintained tool outweigh the customization loss.
Agent Memory focuses specifically on long-term memory layers for ai agents — vector stores, episodic recall, semantic compression, and persistent context across sessions. Knowledge Base & RAG is a related but distinct category — see https://agentskillshub.top/best/knowledge-base/ for those tools. The two often appear in the same agent pipeline but solve different problems: choose agent memory when your primary goal is the specific task, and knowledge base & rag when the workflow is broader.
For most teams, yes. mem0 has 60.4k stars worth of community testing, handles edge cases you haven't thought of, and ships with documentation. Build your own only when (1) your requirements are deeply non-standard, (2) you have a security/compliance reason to avoid OSS dependencies, or (3) the maintenance burden is small enough (<200 lines of code) that you'll save time long-term. The break-even point is usually around 2-3 weeks of dev time saved.
Most agent memory tools listed are open source under permissive licenses (MIT, Apache 2.0). A handful offer paid managed/cloud versions on top of free self-hosted core. Always check the LICENSE file on each tool's GitHub repository before commercial use — some use AGPL or non-commercial restrictions that may not fit your deployment model.