OpenAI Codex Memories + Chronicle alternatives

Codex Memories carries preferences, conventions and pitfalls across Codex threads as local memory files. The Chronicle research preview has been replaced by Computer History, a rebuilt macOS desktop feature (ChatGPT Pro, Business, Enterprise; off by default)… Full OpenAI Codex Memories + Chronicle record →

  1. 1 Gemini CLI memory (save_memory / GEMINI.md) Coding-agent memory

    also in Coding-agent memory · same storage (file) · same retrieval (injection) · same memory unit (fact)

    OSS ✓ Self-host ✓ Managed ? MCP ✓ ★ 108k released 2026-10-21 Apache-2.0 Compare with OpenAI Codex Memories + Chronicle →

  2. 2 Devin (Cognition) Coding-agent memory

    also in Coding-agent memory · same storage (file) · same retrieval (injection) · same memory unit (fact)

    OSS ? Self-host ✓ Managed ✓ MCP ✓ Compare with OpenAI Codex Memories + Chronicle →

  3. 3 Aider Coding-agent memory

    also in Coding-agent memory · same storage (file) · same retrieval (injection)

    OSS ✓ Self-host ✓ Managed — MCP — ★ 41k released 2026-02-12 Apache-2.0 Compare with OpenAI Codex Memories + Chronicle →

  4. 4 Anthropic Claude Memory Platform-provider memory

    same storage (file) · same retrieval (injection) · same memory unit (fact, summary)

    OSS ? Self-host — Managed ✓ MCP ✓ Compare with OpenAI Codex Memories + Chronicle →

  5. 5 Replit Agent Coding-agent memory

    also in Coding-agent memory · same storage (file) · same retrieval (injection)

    OSS ? Self-host — Managed ✓ MCP ✓ Compare with OpenAI Codex Memories + Chronicle →

  6. 6 agentmemory (rohitg00) Coding-agent memory

    also in Coding-agent memory · same retrieval (injection) · same memory unit (fact, summary)

    OSS ✓ Self-host ✓ Managed ? MCP ✓ ★ 30k released 2026-10-21 Apache-2.0 Compare with OpenAI Codex Memories + Chronicle →

  7. 7 Beads (Steve Yegge) Coding-agent memory

    also in Coding-agent memory · same retrieval (injection) · same memory unit (fact, summary)

    OSS ✓ Self-host ✓ Managed ? MCP ✓ ★ 28k released 2026-10-22 MIT Compare with OpenAI Codex Memories + Chronicle →

  8. 8 Letta Code Coding-agent memory

    also in Coding-agent memory · same storage (file) · same retrieval (injection)

    OSS ✓ Self-host ✓ Managed ? MCP ? ★ 3.7k released 2026-10-22 Apache-2.0 Compare with OpenAI Codex Memories + Chronicle →

Ranked by shared memory design (storage, retrieval, conflict handling, memory unit), same section and shared must-haves (open source, self-hosting, MCP), with adoption as a tie-breaker. ✓ confirmed · — no · ? not in the catalog yet. Want picks for your own requirements? Use the chooser. Checking a whole project? Check your stack.