# AI answer engines

A guide to notable AI answer engines and search assistants, spanning general web search, academic research, and developer-focused Q&A, grouped by use case.

Canonical URL: https://globalaiproductindex.com/guides/best-ai-answer-engines/

## General AI search

- [Perplexity](https://globalaiproductindex.com/products/perplexity/) (Perplexity AI) — Answer Engines, Freemium, launched 2022-12. AI answer engine that combines web search with cited, conversational answers.
- [You.com](https://globalaiproductindex.com/products/you-com/) (You.com) — Answer Engines, Freemium, launched 2021-11. AI search and answer platform, now focused on enterprise AI agents and a web search API for grounding LLMs.
- [Genspark](https://globalaiproductindex.com/products/genspark/) (Genspark) — Answer Engines, Freemium, launched 2024-06. AI answer engine that has grown into an all-in-one 'Super Agent' workspace for search, slides, docs, and task automation.
- [Felo](https://globalaiproductindex.com/products/felo/) (Felo) — Answer Engines, Freemium, launched 2024-07. Multilingual AI search engine that generates sourced answers and mind-map style summaries.

## Research and academic search

- [Consensus](https://globalaiproductindex.com/products/consensus/) (Consensus) — Answer Engines, Freemium, launched 2022. AI answer engine that finds and summarizes findings from peer-reviewed scientific research papers.
- [Elicit](https://globalaiproductindex.com/products/elicit/) (Elicit) — Answer Engines, Freemium, launched 2022. AI research assistant that finds, screens, and summarizes academic papers to help answer research questions.
- [Liner](https://globalaiproductindex.com/products/liner/) (Liner) — Answer Engines, Freemium, launched 2015. AI search and research assistant that answers questions with cited sources and lets users highlight and organize findings.

## Q&A and specialized search

- [iAsk](https://globalaiproductindex.com/products/iask/) (iAsk.Ai) — Answer Engines, Free, launched 2023. AI search engine that returns direct, sourced answers to natural-language questions.
- [Andi](https://globalaiproductindex.com/products/andi/) (Andi) — Answer Engines, Free, launched 2022. Conversational AI search engine that answers questions and summarizes pages instead of showing ad-driven links.
- [Exa](https://globalaiproductindex.com/products/exa/) (Exa) — Answer Engines, Paid, launched 2021. Neural web search API built for AI applications, returning meaning-based results and page content.

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Data from the [Global AI Product Index](https://globalaiproductindex.com/), licensed CC BY 4.0.