keyv.org

What It Is

Keyv is a simple key-value storage library for JavaScript/Node.js, designed to connect multiple storage backends through a consistent interface. By default, it stores data in memory, but it can switch to backends such as Redis, Mongo, SQLite, Postgres, MySQL, Memcache, etcd, Valkey, and Dynamo via a connection URI or storage adapter. With TTL expiration support, it works well both as a caching layer and as a lightweight persistent key-value store.

Core Features and Ecosystem

Based on the documentation, Keyv’s core API is very straightforward: after creating a Keyv instance, you can use methods such as set, delete, and clear, and specify millisecond-level TTL when calling set. Options include namespace, ttl, compression, serialize, deserialize, store, adapter, and more. namespace helps prevent key collisions when multiple modules share the same database; compression supports gzip, brotli, and lz4, while also allowing custom compression adapters that can be tested with @keyv/test-suite. In terms of ecosystem, the official documentation lists many @keyv/* storage adapters and also supports third-party modules that implement the Map API, such as quick-lru.

Pricing and Open-Source Status

The main content does not mention commercial pricing, subscription plans, or payment methods. The site shows GitHub PRs, Contributors, Full Changelog, and npm installation instructions, indicating that the project is maintained through open-source collaboration. However, the main content does not specify the license or commercial support terms. It can therefore be treated as a free development library, but enterprises that require an SLA or long-term version support should verify those details themselves.

Pros and Cons

The advantages are its simple interface, broad backend coverage, and complete set of common caching features. The documentation includes installation guidance, parameter tables, connection URIs, third-party adapters, namespaces, compression, and examples for embedding modules, making it fairly practical. The downside is that the crawled content shows many breaking changes in the v6 alpha/beta releases, including changes to the API, memory adapter, storage adapter, and key prefixing. Upgrade cost and compatibility therefore need careful evaluation. In addition, service support information is limited.

Who It’s For and Access from China

Keyv is suitable for Node.js backend developers, framework plugin authors, and teams that need to flexibly switch caching implementations between in-memory storage and backends such as Redis, Mongo, and SQL databases. The main content does not directly describe access from China. Since the domain and GitHub/npm-related resources may perform differently across network environments, the access status is marked as unknown. Alternatives to consider include cache-manager, node-cache, lru-cache, ioredis, or using the specific database client directly.