Best Memory Plugins

The best memory plugins for AI coding agents, ranked: persistent memory for Claude Code, Codex, Cursor, OpenCode, Cline and more.

Best Memory Plugins ranks 24 plugins and extensions that give a coding agent persistent memory between sessions: what it decided, what failed, what the codebase looks like. If you are looking for a Claude Code memory plugin, this list puts claude-mem, Supermemory, Hindsight, Mem0 and 19 others side by side, along with how each one captures memory (hooks on every turn, or a tool the agent has to remember to call), where it stores it, and whether it also covers Codex, Cursor and other agents. The memory each agent ships on its own (Claude Code auto memory, Codex memories, Copilot Memory and others) is compared separately, because it is what every plugin here builds on or replaces.

Short answer. For a team that wants one memory across everyone's agents, Glen. For a solo Claude Code user who wants automatic local capture, claude-mem (switch its observer to local). For hook-driven recall on every prompt across four agents, Supermemory. For no LLM and no cloud at all, deja-vu or projectmem.

Disclosure: this list is maintained by the Glen team, and Glen is ranked first. Every other entry is ranked on the published criteria, and its facts link to their sources.

Contents

• At a glance
• How we ranked
• The ranked list
• Built-in agent memory (not ranked)
• Deprecated or not recommended
• FAQ
• Related
• Contributing
• License

At a glance

Star badges are live. Where a plugin lives inside a larger monorepo, the badge counts the whole repo; the entry says so.

#	Plugin	Hosted or local	Memory stored as	Capture	Team sharing	License	Stars
1	Glen	Hosted	Shards and observations on Glen's servers	Hooks every turn; recall every prompt (on demand in Cursor, Grok)	Org-wide, access checked per observation	Plugin MIT; hosted service	site
2	claude-mem	Local; hosted observer by default	SQLite FTS5 + Chroma	Six lifecycle hooks	Opt-in TeamBrain	Apache-2.0
3	Supermemory	Hosted; self-host option	Supermemory cloud container	Hooks; search on every prompt	Team-named namespace	MIT (README badge)
4	Hindsight	Cloud default; self-host or local daemon	Per-repo bank (Postgres + pgvector)	Hooks; synthesis on first prompt	One bank for all agents; Cloud teams	MIT
5	agentmemory	Local	Local data dir, BM25 + optional embeddings	Hooks (12 in Claude Code)	One server for your agents	Apache-2.0
6	Mem0 plugin	Hosted	Mem0 Platform + local queue	Hooks; recall on first prompt	Shared project pool	Apache-2.0
7	Cognee memory	Local default; Cognee Cloud	Cognee graph + vector	Hooks; inject on prompt submit	Not documented	Apache-2.0
8	Claude Subconscious	Letta Cloud or self-hosted Letta	Letta agent memory	Async hooks feed a background agent	Not documented	MIT
9	mcp-memory-service	Local or self-hosted	SQLite + local ONNX embeddings	Hooks (Claude Code, Codex)	Self-hosted HTTP sync	Apache-2.0
10	deja-vu	Local	Index of transcripts already on disk	Hooks; no LLM calls	None described	MIT
11	MemPalace	Local; team server option	Verbatim text	Auto-save hooks + transcript mining	Team server compose file	MIT
12	Episodic Memory	Local	SQLite + sqlite-vec	Hooks archive transcripts; search on demand	None described	MIT
13	memsearch	Local	Daily Markdown files + Milvus index	Every turn captured; recall by skill	Not documented	MIT
14	Basic Memory	Local; paid cloud	Markdown files + SQLite index	Agent writes notes; briefing hooks	Basic Memory Teams (paid)	AGPL-3.0
15	Engram	Local	SQLite + FTS5	Tool calls; plugins	Git Sync	MIT
16	Beads	Local; Dolt remotes	Dolt version-controlled SQL	bd remember, injected by bd prime	Dolt remotes	MIT
17	projectmem	Local, in the repo	.projectmem/ files	Git hooks + file watcher	Distilled files committed to git	MIT
18	LongMemory	Local	SQLite + embeddings	Session porter imports logs; plugins	Not documented	Apache-2.0
19	Nowledge Mem	Nowledge Mem app	Not documented	Hooks	Not documented	No license file
20	memU	Local or memU Cloud	Writes into CLAUDE.md / AGENTS.md	Adapters read session JSONL	Not documented	Not detected
21	Zep Context plugin	Hosted	Temporal knowledge graph	Tool calls guided by a skill	Shared Context Graphs	Plugin Apache-2.0; cloud proprietary
22	Serena	Local	Not documented	Agent calls a tool	Not documented	GPL-3.0-or-later (app)
23	Pieces	Local (desktop app)	PiecesOS on-device store	OS-level capture; recall over MCP	Enterprise plan	Proprietary	closed source
24	Cline Memory Bank	Local, in the repo	Six Markdown files in memory-bank/	You ask Cline to update	Through git	Docs pattern

How we ranked

Glen's first place is the maintainer's pick. Entries 2 to 24 are ordered on these criteria, read from each project's README, docs, pricing page and the GitHub API in early November 2026:

1. Maintained. A commit or release in the last 6 months. Archived, retired and stale plugins go to Deprecated or not recommended.
2. Ships a memory plugin for a coding agent. A plugin, extension, hook set or documented rules pattern that installs into the agent. Projects that reach coding agents only through a generic MCP connection (MemOS, Memori) or index code rather than conversations (DeusData/codebase-memory-mcp, zilliztech/claude-context) are left out. The Best Agent Memory MCP list covers MCP-only servers.
3. Capture model. Hooks that capture every turn and inject on every prompt rank above hooks that inject only at session start, which rank above a store the agent has to remember to call.
4. Retrieval quality evidence. Benchmarks and toke