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RxDB

Freemium#19 of 30 in Embedded DatabasesMobile Databases

RxDB: A strong fit for offline-first JavaScript apps that need local data and synchronization. Ranked #19 of 30 in Embedded Databases by our editors (6.9/10); pricing: Free plan; best for offline-first apps needing synchronization.

6.9/10Editor score
Visit RxDB
RxDB6.9 Visit RxDB

At a glance

  • Editor score
    6.9 / 10
  • Pricing
    Free plan
  • Best for
    Offline-first apps needing synchronization
  • Free plan
    Yes
  • Paid from
    $99/mo
  • Facts checked
    22 Sep 2026
RxDB screenshot

  • Where it wins

    • Reactive queries, replication, conflict handling, and schema migrations
    • Open-source Free plan with multiple storage engines
    • Integrates with GraphQL, Firebase, Supabase, MongoDB, and CouchDB

  • Where it doesn't

    • Self-hosted deployment requires a separate backend or service
    • No transactions or dedicated vector-search plugin
    • Paid plans start at $99 per month billed annually

Our verdict on RxDB

RxDB is an open-source, local-first NoSQL database for JavaScript applications. It stores JSON documents in browsers, mobile apps, desktop environments, and servers, making it suited to offline-capable products that need local persistence and synchronization. Its core capabilities include reactive observable queries, JSON Schema validation, schema migrations, conflict handling, revisions, encrypted fields and attachments, and JSON import and export. RxDB supports web, iOS, and Android applications, with storage options that include IndexedDB, SQLite, Dexie, and LocalStorage.

The Free plan provides the open-source core, schemas, queries, hooks, replication, realtime sync, schema validation, migrations, and Dexie, Memory, and LokiJS storage. It supports up to 13 open collections in parallel. Pro costs $99 per month billed annually and adds OPFS, IndexedDB, SQLite, and Filesystem storage, plus WebCrypto encryption, Fulltext Search, and unlimited developers. Pro Plus costs $239 per month billed annually and adds Worker and Shared Worker storage, sharding, memory-mapped storage, a Query Optimizer, and Fastify and Koa server adapters. Enterprise adds a custom commercial license and MSA, support SLA, architecture review and onboarding, and source code access.

Integration breadth is a major consideration: RxDB can replicate through RxServer, GraphQL, Firebase, Supabase, MongoDB, NATS, HTTP, CouchDB, WebRTC, Appwrite, Google Drive, Microsoft OneDrive, or custom servers. The trade-off is that deployment is self-hosted rather than a managed RxDB cloud service, so teams choose and operate the synchronization backend or service. RxDB also does not provide transactions or a dedicated vector-database plugin. Choose it for offline-first applications where local data, reactive access, and synchronization are central. Consider an alternative when managed hosting, transactions, or dedicated vector search is a primary requirement.

Your product? Our editors can test RxDB in depth and publish a review, labelled as paid · from $149/mo →

RxDB pricing

Plans Free planFreemium A usable free plan; paid tiers unlock the limits above. Prices checked 22 Sep 2026.
See plans on rxdb.info

All 4 RxDB plans and prices →

RxDB fact sheet

Free planYes
Paid from$99/mo
Supported platformsNot verified
Database modelNot verified
Query interfaceNot verified
EncryptionNot verified
Data synchronizationNot verified
Maximum database sizeNot verified
DeploymentDesktop, Mobile
PlatformsWeb, Windows, macOS, Linux, iOS, Android
SupportCommunity, Docs
Built forSolo, Small business, Mid-market, Enterprise (editorial estimate)
Integrations11 integrations: GraphQL, Firebase, Supabase, MongoDB, NATS, HTTP …
PricingFree plan (source)
Websiterxdb.info
Facts checked22 Sep 2026

RxDB integrations

RxDB lists 11 integrations on its own site.

  • GraphQL
  • Firebase
  • Supabase
  • MongoDB
  • NATS
  • HTTP
  • CouchDB
  • WebRTC
  • Appwrite
  • Google Drive
  • Microsoft OneDrive

Alternatives to RxDB

See all RxDB alternatives →

Also Ranked In

RxDB is ranked in 2 of our directories.

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Featured on iTechGuides

Featured on iTechGuides — RxDB 6.9/10

RxDB is listed in our Embedded Databases directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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