Letta Code alternatives

Letta's stateful coding-agent harness: agents rewrite their own memory blocks and skills, version context in git via MemFS (syncable to GitHub) and reflect via a periodic /sleeptime 'dreaming' process. from Letta (MemGPT) team. Full Letta Code 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 conflict handling (agent) · same memory unit (file) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ? MCP ✓ ★ 108k released 2026-10-21 Apache-2.0 Compare with Letta Code →

  2. 2 Aider Coding-agent memory

    also in Coding-agent memory · same storage (file) · same retrieval (injection) · same memory unit (episode) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed — MCP — ★ 41k released 2026-02-12 Apache-2.0 Compare with Letta Code →

  3. 3 Mistral Vibe (Remote Agents) + Mistral Medium 3.5 Coding-agent memory

    also in Coding-agent memory · same retrieval (injection) · same memory unit (episode) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 4.9k released 2026-10-20 Apache-2.0 (Vibe CLI); Modified MIT (Medium 3.5… Compare with Letta Code →

  4. 4 OpenAI Codex (cloud agent) Coding-agent memory

    also in Coding-agent memory · same storage (file) · same retrieval (injection) · same memory unit (episode) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 128k released 2026-10-27 Apache-2.0 (Codex CLI; cloud agent proprietary) Compare with Letta Code →

  5. 5 Bolt.new (StackBlitz) Coding-agent memory ⚠ stale — no commits since 2024-12

    also in Coding-agent memory · same storage (file) · same retrieval (injection) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ✓ MCP — ★ 17k MIT Compare with Letta Code →

  6. 6 Replit Agent Coding-agent memory

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

    OSS ? Self-host — Managed ✓ MCP ✓ Compare with Letta Code →

  7. 7 Khanmigo Vertical / domain-specific AI memory

    same storage (relational) · same retrieval (injection) · same memory unit (episode)

    OSS ? Self-host — Managed ✓ MCP ? Compare with Letta Code →

  8. 8 Lovable Coding-agent memory

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

    OSS ? Self-host — Managed ✓ MCP ✓ Compare with Letta Code →

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.