Meilisearch
Meili SAS · Vector databases
Rust search engine for application search-as-you-type with typo tolerance, faceting and hybrid semantic search; MIT core plus BSL enterprise parts
MIT AND BUSL-1.1Open sourceFreeSelf-hostedNov 2, 2026
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MongoDB
MongoDB, Inc. · NoSQL & key-value stores
Document database storing BSON documents with a rich aggregation pipeline, available as a source-available Community Server or the managed Atlas service
SSPL-1.0FreeFreemiumSelf-hostedBroken
OpenSearch
OpenSearch Software Foundation (Linux Foundation) · Vector databases
Apache-2.0 search and analytics suite forked from Elasticsearch and Kibana, governed by the OpenSearch Software Foundation
Apache-2.0Open sourceFreeSelf-hostedBroken
Pinecone
Pinecone Systems, Inc. · Vector databases
Fully managed, proprietary vector database service with serverless indexes, namespaces, metadata filtering and integrated embedding and reranking
ProprietaryFreemiumUsage-basedNov 2, 2026
Supabase
Supabase Inc. · Relational databases
Open-source backend platform built around a dedicated PostgreSQL database with auto-generated APIs, authentication, file storage, realtime subscriptions and edge functions
Apache-2.0Open sourceFreemiumSelf-hostedNov 2, 2026
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