Best Alternatives to Obsidian Local REST API

HTTPS REST API for Obsidian vault — read/write/append notes, daily notes, search; 1.7K stars. Compare 10 similar free AI tools.

1. Obsidian — Local-first knowledge base — AI daemon-friendly via REST API (Free: Free personal use; plain markdown)
2. Obsidian Copilot — Vault-wide RAG inside Obsidian — 50+ LLM providers (Free: Free plugin; bring your API key)
3. Obsidian Copilot — Vault-wide RAG inside Obsidian — 50+ LLM providers, 3.2K stars; bring your own API key (Free: Free; BYOK)
4. Smart Connections — Local-first AI embeddings for Obsidian (Free: Free; bge-micro-v2 locally)
5. HackerNews Algolia API — Full HN search API — no auth, unlimited, great tech pulse signal (Free: Unlimited; no auth required)
6. Smart Connections — Local-first AI embeddings — bge-micro-v2 model runs entirely in Obsidian; vectors stored alongside vault (Free: Free plugin; 100% local)
7. Khoj — Most mature open second-brain AI — native Obsidian integration, semantic search, deep research (Free: OSS; Docker/Python + Obsidian plugin)
8. Khoj — Most mature open-source second-brain AI — Obsidian integration, semantic search, deep research, scheduled automations (Free: Full OSS; Docker or pip install + Obsidian plugin)
9. Brave Search API — Privacy-first search API — 2K free/month (Free: 2,000 free queries/month)
10. aidaemon — Rust personal AI daemon — Telegram interface, 40+ tools, SQLite+vectors, cron scheduling, ~10MB idle (Free: Open source; runs as background service)

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