Instead of RxDB
RxDB alternatives
RxDB places a JavaScript NoSQL database inside an application, keeping data on the client for offline operation and allowing an app to run without a backend. Its Sync Engine connects with services such as GraphQL, Firebase, Supabase, MongoDB, CouchDB, WebRTC, and others. Observable queries react to data changes, while JSON Schema validation, migrations, and encrypted local documents support app development across browsers, mobile, desktop, and server runtimes. Storage choices include IndexedDB, SQLite, OPFS, MongoDB, and several filesystem options.
- 1
Chroma
Free plan Open source AndroidAPIiPhone+5AI embeddings, metadata, and multimodal vector retrieval — Chroma centers on dense, sparse, hybrid, full-text, regex, and metadata search for AI data, unlike RxDB’s general app database.
Free plan · paid from $250/mo Visit site - 2
LadybugDB
Free plan AndroidAPIiPhone+5Analytical graph workloads and agentic applications — LadybugDB is an embedded columnar graph database using Cypher, vectorized execution, and parallel analytical queries rather than RxDB’s document model.
Free plan Visit site - 3
SQLite
by SQLiteFree plan Open source AndroidAPIiPhone+5Self-contained transactional SQL databases — SQLite provides a serverless SQL engine storing a complete database in one cross-platform file, instead of RxDB’s synchronized NoSQL documents.
Free plan Visit site - 4
bbolt
Free plan AndroidiPhoneLinux+3Pure Go embedded key-value storage — bbolt stores byte-sorted bucketed key/value data in one file with serializable ACID transactions, rather than RxDB’s JavaScript documents and sync engine.
Open source Visit site - 5
EJDB2
Free plan APIiPhoneLinux+3Embeddable JSON databases with REST access — EJDB2 is a C-library JSON engine with JQL joins, projections, indexes, online backups, and optional REST or WebSocket endpoints.
Open source Visit site - 6
ObjectBox
Free plan AndroidAPIiPhone+4Offline mobile and IoT object data — ObjectBox offers native object APIs, relationships, reactive observers, schema migration, vector search, and device-backend sync for embedded applications.
- 7
PouchDB
Free plan AndroidiPhoneLinux+4JavaScript apps syncing local data with CouchDB — PouchDB is a local JavaScript database focused on CouchDB-compatible replication, with IndexedDB or LevelDB storage and optional Mango queries.
Free plan Visit site - 8
CloudKit
Free plan APIiPhoneMac+1 - 9
Ditto
Free plan AndroidiPhoneLinux+2 - 10
Firestore
Free plan AndroidAPIiPhone+1 - 11
Drift
Free plan AndroidExtensioniPhone+4 - 12
GRDB.swift
Free plan iPhoneLinuxMac - 13
LiteDB
Free plan AndroidAPIiPhone+3 - 14
EMBA
Free plan LinuxSelf-hosted - 15
FMDB
Free plan iPhoneMac - 16
Isar
Free plan AndroidiPhoneWeb - 17
GUN
Free plan AndroidAPIiPhone+5 - 18
Realm
Free plan AndroidiPhoneLinux+3 - 19
Sparksee
Free plan AndroidAPIiPhone+4 - 20
Parse Platform
Free plan AndroidAPIiPhone+3 - 21
WatermelonDB
Free plan AndroidAPIiPhone+2 - 22
WCDB
Free plan AndroidiPhoneLinux+2 - 23
SQLite.swift
Free plan iPhoneLinuxMac - 24
- 25
Mimer SQL Mobile
Free trial AndroidAPILinux+2 - 26
- 27
AWS Amplify DataStore
Paid AndroidiPhoneWeb - 28
Room
Paid AndroidiPhoneLinux+2
Alternatives make sense when RxDB’s 13-collection free-tier limit, annual paid plans from $99 per month, or app-local JavaScript focus do not fit. LocalStorage is intended for simple browser setups and very small datasets, which may also affect a design with heavier writes. Compare each option’s data model, query style, language APIs, deployment model, transaction behavior, and synchronization approach. Some products below concentrate on vector retrieval, graph analytics, SQL, embedded key-value storage, or JSON, while ObjectBox and PouchDB stay closer to offline application data use.