Couchbase Lite

Couchbase Lite embeds a NoSQL database in applications, providing local reads and writes when a network is unavailable. When connectivity returns, synchronization catches up automatically. It supports cloud-to-edge sync through Sync Gateway or App Services, as well as peer-to-peer synchronization over Wi-Fi and Bluetooth with auto-discovery and mesh support. SQL++ extends SQL for JSON and supports joins, aggregations, and complex filters. Full-text and on-device vector search support hybrid semantic queries and RAG, while the Predictive Query API can run local AI models for inference. Security options include AES-256, TLS, customer-provided keys, field-level encryption, and automatic purge after access revocation. Supported environments include native iOS, Android, and Windows, .NET and Java desktop or server apps, C/C++ IoT applications, and browser JavaScript; React Native, Ionic, and Flutter are community-supported. Couchbase Mobile includes Lite, Sync Gateway licensing, peer sync, SQL++ and search, vector search, and Silver or Gold support. Pricing is available by request, and no data syncing fees are listed. There is no free plan.

Couchbase Lite is designed for applications that need local data access and later synchronization. Pricing is by request, and there is no free plan.

It suits mobile, IoT, and web applications that need local storage and synchronization while offline. It may also fit teams that need peer syncing, local search, or locally run model inference.

Couchbase Lite is an embedded NoSQL database for apps that need local data access and synchronization across devices and cloud services. It suits teams building offline-first mobile, IoT, and web software. Its combination of local queries, peer sync, and on-device search is compelling, though custom pricing and a specialized use case make it a poor fit for general-purpose database needs.

Overview

Reads and writes happen locally, so an app can keep working without a network; synchronization catches up when connectivity returns. Couchbase Lite can sync cloud-to-edge through Sync Gateway or App Services, or peer-to-peer over Wi-Fi and Bluetooth. That architecture is useful when connectivity is intermittent or devices need to exchange data directly. It also means the product is aimed at applications built around local data and synchronization, rather than serving as a drop-in choice for every database workload.

Key features

SQL++ extends SQL to JSON and supports local joins, aggregations, and complex filters. Full-text search and on-device vector search support both conventional lookup and hybrid semantic queries, including retrieval-augmented generation. The Predictive Query API can run local AI models for inference at the point of interaction. These capabilities let an app query and act on local data without making each operation depend on a round trip to the cloud.

Peer-to-peer sync supports automatic discovery, mesh connections, and cross-platform iOS and Android communication. The JavaScript SDK brings offline synchronization to web apps. Security features include AES-256, TLS, customer-provided keys, field-level encryption, and automatic data purge after access is revoked. The supported document size tops out at 20 MB, a relevant constraint for apps that store large individual records.

Pricing

Couchbase Mobile has custom pricing. Its package includes Couchbase Lite, a Sync Gateway license, peer-to-peer sync, SQL++, full-text and vector search, and Silver- or Gold-level support. The pricing model has no free plan, and the package is positioned with no data-syncing fees. Teams evaluating it should weigh the included sync and support against a price that depends on a request, rather than a published self-serve tier. There are no cheaper published plans with reduced features or quotas to compare.

Platforms

Official support covers native iOS, Android, and Windows; .NET and Java desktop or server apps; C and C++ IoT apps; and browser JavaScript. React Native, Ionic, and Flutter have community support. The broader platform reach helps teams share an offline data strategy across application types, while community-supported frameworks may require more ownership from the development team.

Who it's for

Couchbase Lite is best suited to product and engineering teams building mobile, IoT, or web applications that must remain useful offline and synchronize later. Its local SQL++ querying, peer mesh sync, and on-device vector search are especially relevant when applications need rich data access close to the user or device. Teams that need a conventional centralized database without offline behavior or synchronization have less reason to choose it.

Pros and cons

• Pros: Local reads and writes keep apps operational offline, with synchronization resuming automatically when connectivity returns.
• Pros: SQL++ joins and aggregations, full-text search, and vector search provide substantial query capability on-device.
• Pros: Peer sync works across iOS and Android over Wi-Fi or Bluetooth, with discovery and mesh support.
• Pros: Encryption options include field-level protection and automatic purge after access revocation.
• Cons: There is no free plan, and pricing is custom, making the cost harder to assess before contacting Couchbase.
• Cons: React Native, Ionic, and Flutter are community-supported rather than officially supported.
• Cons: Individual documents are limited to 20 MB, which may not suit workloads centered on very large records.

Alternatives

For a broader comparison, browse Mobile Databases, Document Databases, Data Replication Software, Database Software, Columnar Databases, or Spatial Databases.

SymmetricDS is a freemium option with a free Community plan and a free trial; consider it if free entry and its listed Android, iOS, Linux, macOS, web, Windows, API, and self-hosted platforms better match your needs. MySQL has a free Community Edition and a free trial, with SQL and NoSQL applications plus replication and high-availability components; it is an alternative for teams seeking that database offering. Debezium is a free, Apache-licensed distributed change data capture platform, suited to readers whose main requirement is CDC.

Estuary offers a free tier and a $100 a month pay-as-you-go plan, making it an option for readers comparing a free or published monthly tier. Fivetran Database Replication has a free plan capped at 500,000 monthly active rows for connections, 3,500 for activations, and 5,000 monthly model runs for transformations; consider it when those quotas suit the workload. PeerDB has a free open-source plan for individuals with Docker setup, CDC, streaming query, and query layer features, for readers who want that starting point. Striim is another data movement option. Amazon Database Migration Service has an AWS Free Tier offering with $100 in credits and up to another $100 for activating foundational AWS services, subject to the stated credit validity of up to 12 months; consider it when that credit-based tier fits.

Verdict

Choose Couchbase Lite when your app must keep reading and writing offline, then synchronize across devices or with cloud services, and you need capable local queries or on-device search. The main reason to look elsewhere is its paid, custom-priced model, especially if your project does not need offline-first behavior or requires a free starting plan.