8 open-source Enterprise Search vendors
Open-source software for Enterprise Search that you can self-host, with auditable source code — regardless of the developer's headquarters.
- vendors scored
- 8
- European
- 3
- last checked
- 11 October 2026
Vendors, scored
Score per vendor: 0 = high exposure, 100 = sovereign
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- Sovereignty score 94 out of 100VespaNorway · Self-hosted / open sourceOpen-source search, recommendation and vector serving engine from Norway's Vespa.ai AS, with real-time updates.
- Sovereignty score 92 out of 100DatafariFrance · Self-hosted / open sourceFrench open-source enterprise search solution built on Apache Solr, maintained by France Labs; self-hosted deployment.
- Sovereignty score 82 out of 100ElasticsearchNetherlands · EU sovereignDistributed, open-source search engine and analytics platform with commercial enterprise features; Netherlands-headquartered with major US operations.
- Sovereignty score 77 out of 100Manticore SearchUnited Kingdom · Self-hosted / open sourceOpen-source search database from the United Kingdom, an Elasticsearch alternative with full-text and vector search via SQL.
- Sovereignty score 69 out of 100Apache SolrUnited States · Self-hosted / open sourceOpen-source (Apache 2.0) enterprise search platform from the Apache Software Foundation with full-text, vector and geospatial search.
- Sovereignty score 69 out of 100OnyxUnited States · Self-hosted / open sourceOpen-source platform from San Francisco for enterprise search and AI chat over company knowledge, self-hostable (Community Edition under MIT).
- Sovereignty score 69 out of 100OpenSearchUnited States · Self-hosted / open source100% Apache 2.0 licensed open-source search and analytics suite; community-driven fork of Elasticsearch, now governed under the Linux Foundation.
- Sovereignty score 69 out of 100TypesenseUnited States · Self-hosted / open sourceOpen-source (GPL-3.0) typo-tolerant search engine (Los Angeles) as an alternative to Algolia and Elasticsearch, with self-hosted and SaaS options.
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