Definition
An answer engine is any search product that responds to a user question with a synthesized answer rather than a ranked list of links. The category includes ChatGPT (with browsing), Perplexity, Google AI Overviews, Microsoft Copilot, Claude with web access, and voice assistants when they give spoken answers. Answer engines share a retrieval-then-generate architecture: they fetch candidate pages from an index (often Bing or Google), select relevant passages, and compose a single reply with optional source citations. For brands, the shift from link lists to synthesized answers changes the game: visibility is no longer about ranking position but about being retrieved, trusted and quoted. A brand that ranks on page one may still be invisible if its content lacks the quotable specifics — numbers, definitions, comparisons — that engines select for their answers. The term answer engine is increasingly used interchangeably with AI search engine, though purists reserve the latter for engines that also return traditional link results.