Which search engines don't have content moderation?

Short answer: none of the mainstream public search engines completely lack content moderation. All major search engines apply some form of moderation, filtering, ranking policies, legal takedowns and safety controls.

Why: search engines must remove or de-prioritize content for multiple reasons:

• Legal compliance (copyright, defamation, child sexual abuse material, hate speech in some jurisdictions, court orders).
• Platform policies (to remove malware, scams, violent extremism, adult content in certain contexts).
• Quality and relevance (spam, low-quality or malicious pages are demoted).
• Safety features (safe-search settings, family filters).

Examples:

• Google and Bing use extensive automated and human-moderated systems, plus legal takedown processes.
• DuckDuckGo emphasizes privacy but still filters illegal content, spam and follows DMCA takedowns.
• Ecosia (searches via Bing) and other privacy-focused engines inherit moderation from their backend providers.
• Smaller or niche search engines (meta-searches, academic indexes, self-hosted crawlers) may apply lighter moderation, but they still must obey laws and often implement filters for spam/malware.

If your goal is:

• Privacy-preserving search: use DuckDuckGo, Startpage, or Searx (self-hosted instance) — these reduce tracking but still enforce some content rules.
• Minimal ranking moderation: running your own crawler/index (e.g., open-source search engines like Apache Nutch + Elasticsearch or building a Searx instance) gives you control over what gets indexed and what is filtered — but you remain legally responsible for hosted content and should implement malware/illegal-content protections.

Caveats:

• Avoiding content moderation entirely can expose you and others to illegal material, malware and harmful content and may be unlawful.
• Hosted public services will comply with legal takedowns; only fully self-hosted/private indexes can avoid third‑party moderation, and those carry legal and ethical risks.

If you tell me why you want a search engine without moderation (privacy, avoiding censorship, academic research, etc.), I can suggest safer, lawful alternatives or technical approaches.