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Top Open Source NoSQL & Document Databases Tools in 2026

A curated collection of the 4 best free and open-source NoSQL & Document Databases tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.

  • Instant

    Instant is a database solution for building real-time and offline-enabled applications, simplifying the development of collaborative products.

    Stars
    10,493
    Last commit
    12d ago
    License
    Apache-2.0

  • undb

    Private first self-hosted no-code database & BaaS

    Stars
    2,975
    Last commit
    14mo ago
    License
    AGPL-3.0

  • AITable

    Visual database and workflow automation tool with AI-powered features and 6,000+ app integrations

    Stars
    15,576
    Last commit
    10mo ago
    License
    AGPL-3.0

  • Elasticsearch

    Distributed search & analytics engine

    Stars
    77,869
    Last commit
    10d ago
    License
    Open Source
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Showing 4 of 4 open-source tools