If you need a powerful search engine with autocomplete and spell check, HeyDay is a great option. It delivers fast and relevant results with AI, with features like more than 100 million autocomplete suggestions, automatic spelling correction and search analytics. The service is geared for e-commerce sites, with instant search results that include summaries, attribute filtering and customizable search results.
Another option is SearchIQ. The service combines AI-powered search logic and real-time analytics with features like cross-site search, customizable result ranking and spell check. It's easy to integrate with sites like WordPress, and it can help improve engagement and business results by lowering bounce rates and boosting conversions.
If you prefer an open-source option, Meilisearch delivers fast and relevant results with search-as-you-type and typo tolerance. It offers a variety of integrations and flexible pricing, so it can be used for site and app search. Its strong security features and active community ensure high availability and active development.