Typesense is an open source, typo tolerant search engine that is optimized for instant sub-50ms searches, while providing an intuitive developer experience.

Features:

Typo Tolerance: Handles typographical errors elegantly, out-of-the-box.
Simple and Delightful: Simple to set-up, integrate with, operate and scale.
Blazing Fast: Built in C++. Meticulously architected from the ground-up for low-latency (<50ms) instant searches.
Tunable Ranking: Easy to tailor your search results to perfection.
Sorting: Sort results based on a particular field at query time (helpful for features like "Sort by Price (asc)").
Faceting & Filtering: Drill down and refine results.
Grouping & Distinct: Group similar results together to show more variety.
Federated Search: Search across multiple collections (indices) in a single HTTP request.
Scoped API Keys: Generate API keys that only allow access to certain records, for multi-tenant applications.
Synonyms: Define words as equivalents of each other, so searching for a word will also return results for the synonyms defined.
Curation & Merchandizing: Boost particular records to a fixed position in the search results, to feature them.
Raft-based Clustering: Setup a distributed cluster that is highly available.
Seamless Version Upgrades: As new versions of Typesense come out, upgrading is as simple as swapping out the binary and restarting Typesense.

Suggested keywords:

Trie - Data structure and relevant algorithms for extremely fast prefix/fuzzy string searching

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