Codebase context and code search tools for agent memory
Context layers and code search that help agents understand large codebases with fewer tokens. Of the 114 tools on our memory for agents page, 8 fit this narrower job. By pricing: 5 open source, 1 source-available, 1 free or freemium, 1 paid, usage-based or enterprise. The most-starred open repos here are Codebase Memory MCP (46,717 stars), Cognee (32,405 stars), Graphiti (31,819 stars). Most come from the memory & RAG (5), coding (2), MCP servers (1) categories.
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Codebase Memory MCP
MCP server that indexes codebases into a persistent knowledge graph so coding agents can look up structure quickly.
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Cognee
Open-source memory platform that builds knowledge graphs so agents keep long-term memory.
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Graphiti
Builds real-time, temporal knowledge graphs that serve as memory for AI agents.
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Context Mode
Context window optimizer for coding agents that sandboxes tool output and persists session memory.
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Zep
Context layer that unifies business data, documents and conversations into memory so agents complete tasks correctly.
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LazyCodex
Agent harness for Codex that adds project memory, planning, execution and verified completion for complex codebases.
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ktx
An open-source context layer for data and analytics agents that gives Claude Code, Codex and other agents a self-improving map of your warehouse, metrics and business definitions.
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Tulimoa Memory
Tulimoa Memory is a hosted, shared memory store for AI agents and agent swarms. Agents write what they learn into it during the day; overnight a separate model sorts those notes into a knowledge graph with associative recall, and each agent starts the morning with a short briefing so it reads less and knows more. It is billed per call, with starting credit to try it.
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GitHub repos (7)
| Repo | GitHub stars | Licence | Last push |
|---|---|---|---|
| Codebase Memory MCP ↗ | 46,717 | MIT | 2026-10-22 |
| Cognee ↗ | 32,405 | Apache License 2.0 | 2026-10-16 |
| Graphiti ↗ | 31,819 | Apache License 2.0 | 2026-10-23 |
| Context Mode ↗ | 30,192 | Elastic License 2.0 (source-available) | 2026-10-23 |
| Zep ↗ | 4,969 | Apache 2.0 for the examples and integrations repo; Zep Cloud itself is a managed service | 2026-10-20 |
| LazyCodex ↗ | 3,792 | — | 2026-10-23 |
| ktx ↗ | 1,620 | — | 2026-07-07 |
7 repos. Stars and licence come from each repo, checked when the listing was last verified.
FAQ
What are the best AI tools for memory for agents focused on codebase context and code search?
We list 8. The first three by GitHub stars and featured status are Codebase Memory MCP: MCP server that indexes codebases into a persistent knowledge graph so coding agents can look up structure quickly.; Cognee: Open-source memory platform that builds knowledge graphs so agents keep long-term memory.; Graphiti: Builds real-time, temporal knowledge graphs that serve as memory for AI agents.
Are there free or open-source options?
Yes: 5 open source, 1 source-available, 1 free or freemium, 1 paid, usage-based or enterprise. Pricing is as each maker states it.
More from memory for agents
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