Claude Code (Anthropic) alternatives

Anthropic's agentic coding tool: Claude as a coding agent in the terminal, IDEs (VS Code, JetBrains), desktop app, web/mobile, GitHub and Slack. Context via CLAUDE.md, skills, hooks, subagents and MCP servers. Full Claude Code (Anthropic) record →

  1. 1 Zed (Agentic Editing) Agent IDEs & coding harnesses

    also in Agent IDEs & coding harnesses · same storage (file) · same retrieval (injection) · same conflict handling (human-arbitrate) · same memory unit (document) · also self-hostable · also offered managed

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 89k released 2026-08-12 GPL-3.0-or-later (primary), with Apache-2.0… Compare with Claude Code (Anthropic) →

  2. 2 Opencode (SST) Agent IDEs & coding harnesses

    also in Agent IDEs & coding harnesses · same storage (file) · same retrieval (injection) · same conflict handling (human-arbitrate) · same memory unit (document) · also self-hostable · also offered managed

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 222k released 2026-10-22 MIT Compare with Claude Code (Anthropic) →

  3. 3 Cline (harness) Agent IDEs & coding harnesses

    also in Agent IDEs & coding harnesses · same storage (file) · same retrieval (injection) · same conflict handling (human-arbitrate) · same memory unit (document) · also self-hostable · also offered managed

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 68k released 2026-09-02 Apache-2.0 Compare with Claude Code (Anthropic) →

  4. 4 Goose (Block) Agent IDEs & coding harnesses

    also in Agent IDEs & coding harnesses · same storage (file) · same retrieval (injection) · same conflict handling (human-arbitrate) · same memory unit (document) · also self-hostable · also offered managed

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 56k released 2026-10-23 Apache-2.0 Compare with Claude Code (Anthropic) →

  5. 5 Kiro Agent IDEs & coding harnesses

    also in Agent IDEs & coding harnesses · same storage (file) · same retrieval (injection) · same conflict handling (human-arbitrate) · same memory unit (document) · also self-hostable · also offered managed

    OSS ? Self-host ✓ Managed ✓ MCP ✓ released 2026-10-22 Compare with Claude Code (Anthropic) →

  6. 6 Charm Crush Agent IDEs & coding harnesses

    also in Agent IDEs & coding harnesses · same storage (file) · same retrieval (injection) · same conflict handling (human-arbitrate) · same memory unit (document) · also self-hostable · also offered managed

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 28k released 2026-08-31 FSL-1.1-MIT (source-available; converts to MIT… Compare with Claude Code (Anthropic) →

  7. 7 Aider (harness) Agent IDEs & coding harnesses

    also in Agent IDEs & coding harnesses · same storage (file) · same retrieval (injection) · same conflict handling (human-arbitrate) · same memory unit (document) · also self-hostable · also offered managed

    OSS ✓ Self-host ✓ Managed ✓ MCP — ★ 50k released 2026-02-12 Apache-2.0 Compare with Claude Code (Anthropic) →

  8. 8 GitHub Copilot (Agent Mode) Agent IDEs & coding harnesses

    also in Agent IDEs & coding harnesses · same storage (file) · same retrieval (injection) · same conflict handling (human-arbitrate) · same memory unit (document) · also offered managed · also has MCP

    OSS ? Self-host — Managed ✓ MCP ✓ Compare with Claude Code (Anthropic) →

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.