OpenGrok - Fast and usable source code search and cross reference engine, written in Java

•    Java

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OpenGrok is a fast and usable source code search and cross reference engine, written in Java. It helps you search, cross-reference and navigate your source tree. It can understand various program file formats and version control histories of many source code management systems.

opengrok source-code search-engine code-search-engine

Sourcegraph - Code search and intelligence, self-hosted and scalable

•    Go

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Sourcegraph is a fast, open-source, fully-featured code search and navigation engine. It provides Fast global code search with a hybrid backend that combines a trigram index with in-memory streaming, Code intelligence for many languages via the Language Server Protocol.

code-search code-intelligence code-search-engine source-code

Tantivy - Full-text search engine library inspired by Lucene and written in Rust

•    Rust

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Tantivy is a full text search engine library written in rust. It is closer to Lucene than to Elastic Search and Solr in the sense it is not an off-the-shelf search engine server, but rather a crate that can be used to build such a search engine.

search-engine searchengine full-text-search lucene library

searchcode server - The offical home of searchcode-server where you can run searchcode locally

•    Java

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searchcode server is a powerful code search engine with a sleek web user interface. searchcode server works in tandem with your source control system, indexing thousands of repositories and files allowing you and your developers to quickly find and reuse code across teams.

searchcode-server search code-search search-engine code-search-engine

Sourcetrail - The interactive source code browser

•    C++

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Sourcetrail, the lightweight code visualizer specifically crafted for fast and comprehensive navigation within your source code. Sourcetrail utilizes software visualization to dynamically generate interactive code maps of any selected type, function, variable, etc. and shows all their dependencies to the rest of the codebase.

code-search code-browser visualization code-search-engine source-code-search source-code

Code Search - Fast, indexed regexp search over large file trees

•    Go

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Code Search is a tool for indexing and then performing regular expression searches over large bodies of source code. It is a set of command-line programs written in Go.

code-search code-search-engine source-code

Zoekt - Fast trigram based code search

•    Go

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This is a fast text search engine, intended for use with source code. (Pronunciation: roughly as you would pronounce "zooked" in English)

code-search search-engine searchengine

quark - Stay happy while offline | World's first offline search engine.

•    C++

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This is the World's first Offline code Search Engine presented by OpenGenus Foundation. You can, now, search code for any algorithm or data-structure in your favorite language even when you are not connected to the internet. We are on a mission to bring the best parts of the Internet Offline, enable people to work offline for a longer period of time and revolutionize the way people interact with the web.

search-engine opengenus code-search offline

CodePilot.ai - The code search service to rule them all and in a dark theme, bind them

•    Javascript

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CodePilot.ai is the Search Tool for Software Developers. Search multiple sources like Github, Stackoverflow, Searchcode at once and find solutions to your coding problems.

code-search code-search-engine aggregation source-code

Jumper - Collaborative search engine in PHP

•    PHP

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Jumper 2.0 is a collaborative community search platform that revolutionizes search by crowdsourcing knowledge management powered by a shared bookmarking engine. It is easily and quickly deployed into a community of practice that benefits users with complex and specialized search requirements. Jumper delivers universal search of any databases, flat files, fileshares, content systems, web pages, blogs and wikis, even people - through one simple search box.

searchengine search-engine full-text-search collaborative community bookmarking-engine

Manticore Search - High performance full-text search engine with SQL and JSON support

•    C++

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Manticore Search is an open source high performance full-text search oriented engine. It is a fork of Sphinx Search. Manticore Search is written in C++. It means speed and low resource consumption, it means you don’t have to worry about a garbage collector that suddenly makes a trouble.

searchengine search-engine full-text-search geo-search

OpenSearch - Open source distributed and RESTful search engine

•    Java

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OpenSearch is a community-driven, open source search and analytics suite derived from Apache 2.0 licensed Elasticsearch 7.10.2 & Kibana 7.10.2. It consists of a search engine daemon, OpenSearch, and a visualization and user interface, OpenSearch Dashboards. OpenSearch enables people to easily ingest, secure, search, aggregate, view, and analyze data. These capabilities are popular for use cases such as application search, log analytics, and more.

search-engine searchengine full-text-search realtime-analytics analytics log-aggregation aggregation clickstream-analytics

algoliasearch-client-php - Algolia Search API Client for PHP

•    PHP

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Algolia Search is a hosted full-text, numerical, and faceted search engine capable of delivering realtime results from the first keystroke. The Algolia Search API Client for PHP lets you easily use the Algolia Search REST API from your PHP code.

search-engine algolia-search algolia faceted-search search-synonyms geo-search search api-client

Constellio - Enterprise Search engine

•    Java

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Constellio Open Source Enterprise Search is based on Apache Solr and using Google Search Appliances connectors architecture, it allows, with a single click, to find all relevant content in your organization (Web, email, ECM, CRM etc.).

search-engine searchengine full-text-search enterprise-search enterprise

Typesense - Fast, typo tolerant search engine for building delightful search experiences

•    C++

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

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Carrot2 - Search Results Clustering Engine

•    Java

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Carrot2 is an Open Source Search Results Clustering Engine. It could cluster the search results from various sources and generates small collection of documents. Carrot2 offers ready-to-use components for fetching search results from various sources including YahooAPI, GoogleAPI, Bing API, eTools Meta Search, Lucene, SOLR, Google Desktop and more.

cluster result-cluster searchengine-cluster

Seeks - An Open Decentralized Platform for Collaborative Search, Filtering and content Curation

•    C++

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Seeks acts as a personalizing Web server or proxy between you and your data feeds. Connect most search engines, RSS/ATOM feeds, Twitter / Identica, Youtube / Dailymotion, Wikis, and basically any source of data, and Seeks will produce a fused personalized batch / stream of results to your queries. Its specific purpose is to regroup users whose queries are similar so they can share both the query results and their experience on these results.

search-engine searchengine meta-search-engine p2p-search-engine social

Xapian - Search Engine Library

•    C++

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Xapian is an Open Source Search Engine Library. It is written in C++, with bindings to allow use from Perl, Python, PHP, Java, Tcl, C# and Ruby. Xapian is a highly adaptable toolkit which allows developers to easily add advanced indexing and search facilities to their own applications. It supports the Probabilistic Information Retrieval model and also supports a rich set of boolean query operators.

searchengine search-engine full-text-search lucene-alternative

Yioop - Open Source Search Engine Software

•    PHP

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Yioop is an open source, PHP search engine capable of crawling, index, and providing search results for hundred of millions of pages on relatively low end hardware. It can index a variety of text formats HTML, RSS, PDF, RTF, DOC and images GIF, JPEG, PNG, etc. It can import data from ARC, WARC, Media-Wiki, Open Directory RDF. It is easily localized to many languages. It has built-in support for new feeds, discussion groups, blogs, and wikis. It also supports mixing indexes to create mash ups.

searchengine search-engine crawler spider search

Strus - Full text Search Engine in C++

•    C++

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The open source project strus provides a collection of C++ (C++98) libraries and command line tools for building a full-text search engine. The strus search engine can be build using any key value store database that provides an upper bound seek function for the stored key/value pairs. Currently there exists an implementation based on the LevelDB library.

searchengine search-engine full-text-search library