Answer Engines
Explore 8 options alongside Exa (Exa), a product in Answer Engines.
Candidates share an existing guide group, a comparison, or specific tags within the same category. This shortlist is not a ranking or a test result.
Listed together in guide “AI answer engines”
Conversational AI search engine that answers questions and summarizes pages instead of showing ad-driven links.
Free
Pricing: Andi is free to use, with no advertising.
This record was last reviewed on 2026-09-10.
Listed together in guide “AI answer engines”
AI search engine that returns direct, sourced answers to natural-language questions.
Free
Pricing: iAsk.Ai is free for standard use; the Pro subscription unlocks premium models, unlimited usage, and extra tools.
This record was last reviewed on 2026-09-10.
Listed together in guide “Research Q&A with verifiable sources”
AI research assistant suite for search, academic research, and writing that answers questions with cited sources.
Freemium
Pricing: Liner has a free plan with ads and daily limits on some features; Pro subscriptions apply across Liner, Liner Scholar, and Liner Write and add higher limits and access to major AI models.
This record was last reviewed on 2026-10-09.
Listed together in guide “Research Q&A with verifiable sources”
AI answer engine that finds and summarizes findings from peer-reviewed scientific research papers.
Freemium
Pricing: A free tier is available; paid plans add unlimited searches and advanced analysis features.
This record was last reviewed on 2026-09-10.
Listed together in guide “Research Q&A with verifiable sources”
AI research assistant that finds, screens, and summarizes academic papers to help answer research questions.
Freemium
Pricing: A free tier is available; paid plans add higher usage levels and advanced extraction.
This record was last reviewed on 2026-09-10.
Related: shares the task Research with citations, Search
AI-powered web browser from Perplexity with a built-in assistant that answers questions and performs tasks across pages.
Freemium
Pricing: Comet is free to use; higher usage limits and premium features come with paid Perplexity subscriptions.
This record was last reviewed on 2026-09-10.
Related: shares the task Research with citations, Search
Berlin-based search engine that pairs web search with AI overviews, an AI chat, and an option to turn AI off.
Free
Pricing: Ecosia does not publish paid plans; the company states that it uses 100% of its profits for climate action and publishes monthly financial reports.
This record was last reviewed on 2026-09-10.
Related: shares the task Research with citations, Search
Multilingual AI search engine that generates sourced answers and mind-map style summaries.
Freemium
Pricing: Felo is free for a limited number of daily advanced searches; the Pro plan unlocks more searches and premium models.
This record was last reviewed on 2026-09-10.
Editorial suggestion — not a checked fact
Choose it when: A person needs to read the answer, not your agent.
What changes: Use the chat surface directly instead of the search API.
What you give up: You give up programmatic control over which sources are retrieved.
Editorial suggestion — not a checked fact
Choose it when: You want search plus a hosted answer layer you do not have to build.
What changes: Call the search API and use its answer endpoints instead of composing answers yourself.
What you give up: Your product's answer formatting becomes dependent on the provider's response shape.