Best Alternatives to HackerNews Algolia API

Full HN search API — no auth, unlimited, great tech pulse signal. Compare 10 similar free AI tools.

1. Obsidian Local REST API — HTTPS REST API for Obsidian vault — read/write/append notes, daily notes, search; 1.7K stars (Free: Free plugin; self-hosted at localhost:27124)
2. Brave Search API — Privacy-first search API — 2K free/month (Free: 2,000 free queries/month)
3. NewsAPI.ai — 150K+ sources, semantic search — 2000 free searches/month; ideal for proactive AI trend alerts (Free: 2,000 searches/month free tier)
4. NewsAPI.ai — 150K+ news sources with semantic search — ideal for trend monitoring agents (Free: 2,000 searches/month free)
5. HubSpot Free CRM — 1M contacts, Breeze AI chatbot — free forever (Free: Free forever: 1M contacts, AI chatbot)
6. Obsidian Copilot — Vault-wide RAG inside Obsidian — 50+ LLM providers (Free: Free plugin; bring your API key)
7. Mistral AI API — European AI — 1B free tokens/month, open-weight models (Free: 1B tokens/month free; Codestral included)
8. Obsidian Copilot — Vault-wide RAG inside Obsidian — 50+ LLM providers, 3.2K stars; bring your own API key (Free: Free; BYOK)
9. Khoj — Most mature open second-brain AI — native Obsidian integration, semantic search, deep research (Free: OSS; Docker/Python + Obsidian plugin)
10. Exa.ai — Neural search API — ideal for AI agents (Free: Free tier; semantic + contents API)

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