Bolt.new (StackBlitz) alternatives

In-browser WebContainer (Rust-backed shared memory) is the implicit state store. No dedicated memory abstraction — project files are the state. Team plan adds shared workspaces + GitHub integration. Full Bolt.new (StackBlitz) record →

  1. 1 Devin (Cognition) Coding-agent memory

    also in Coding-agent memory · same storage (file) · same retrieval (injection) · same memory unit (document) · also self-hostable · also offered managed

    OSS ? Self-host ✓ Managed ✓ MCP ✓ Compare with Bolt.new (StackBlitz) →

  2. 2 Replit Agent Coding-agent memory

    also in Coding-agent memory · same storage (file) · same retrieval (injection) · same memory unit (document) · also offered managed

    OSS ? Self-host — Managed ✓ MCP ✓ Compare with Bolt.new (StackBlitz) →

  3. 3 OpenAI Codex (cloud agent) Coding-agent memory

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

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

  4. 4 Lovable Coding-agent memory

    also in Coding-agent memory · same storage (file) · same retrieval (injection) · same memory unit (document) · also offered managed

    OSS ? Self-host — Managed ✓ MCP ✓ Compare with Bolt.new (StackBlitz) →

  5. 5 AGENTS.md File-backed / editor paradigms

    same storage (file) · same retrieval (injection) · same memory unit (document) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ? MCP ? ★ 25k MIT Compare with Bolt.new (StackBlitz) →

  6. 6 Aider Coding-agent memory

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

    OSS ✓ Self-host ✓ Managed — MCP — ★ 41k released 2026-02-12 Apache-2.0 Compare with Bolt.new (StackBlitz) →

  7. 7 Gemini CLI memory (save_memory / GEMINI.md) Coding-agent memory

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

    OSS ✓ Self-host ✓ Managed ? MCP ✓ ★ 108k released 2026-10-21 Apache-2.0 Compare with Bolt.new (StackBlitz) →

  8. 8 gbrain (Garry Tan) Dedicated memory layers

    same storage (file) · same retrieval (injection) · same memory unit (document) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ? MCP ✓ ★ 31k released 2026-10-22 MIT Compare with Bolt.new (StackBlitz) →

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.