Databases for Session store

The in-memory data structure server that became the default cache, now with search, JSON and vectors built in.

AWS's serverless key-value and document store with single-digit-millisecond reads at any scale.

The Linux Foundation's BSD-licensed fork of Redis, now the default engine on AWS and Google Cloud.

The original multi-threaded, dead-simple distributed memory cache for key-value blobs.

Flash-optimized distributed key-value and document database for predictable sub-millisecond latency at scale.

A Java in-memory data grid and stream processor that embeds in your app or runs as a cluster.

AWS's managed Valkey, Redis OSS and Memcached service, provisioned or serverless.

Red Hat's open-source distributed cache and key-value store, embeddable or as a RESP-compatible server.

In-memory database and Lua application server in one process, with an optional disk engine.

A multi-threaded, shared-nothing in-memory store that speaks Redis and Memcached on one big box.

Serverless, per-request-priced Redis with an HTTP API built for edge and serverless functions.

Erlang-based, Dynamo-style key-value store built to stay up through ugly failures.

Oracle's long-running Java data grid, with a UPL-licensed Community Edition on GitHub.

Oracle's sharded key-value and JSON store, available as Apache-licensed software or an OCI service.

Snap's multi-threaded Redis fork with active-active replication and FLASH storage, now dormant.

The open-source core of GemFire: a consistent, partitioned in-memory data grid for Java.

A Redis-protocol database on RocksDB that trades a little latency for disk-sized capacity.

Managed Valkey and serverless cache/pub-sub from ex-DynamoDB engineers, plus self-hosted Valkey tooling.

Microsoft Research's .NET cache-store that speaks RESP and scales across cores and storage tiers.

A native .NET distributed cache and data grid for Windows and Linux, with an Apache-licensed edition.

Single-threaded stateful actors at the edge, each with its own strongly consistent SQLite store.

Tencent's mmap-backed key-value store for mobile apps, built as a faster SharedPreferences/NSUserDefaults.

Qihoo 360's Redis-compatible, RocksDB-backed store for datasets too big for memory.

Google Cloud's managed in-memory family: Valkey, Redis, Redis Cluster and Memcached.

Broadcom's commercial in-memory data grid, the enterprise build of Apache Geode.

Globally cached, eventually consistent key-value store for read-heavy data at Cloudflare's edge.

Redis-protocol NoSQL server that keeps strings, hashes, sorted sets and lists on disk in LevelDB.

Netflix's memcached-based distributed cache with zone-aware replication, built for AWS microservices.

Netflix's Dynamo-style proxy layer that adds sharding and multi-datacenter replication to Redis and Memcached.

A durable, Valkey/Redis-compatible in-memory database on AWS backed by a multi-AZ transaction log.

Redis Ltd.'s own managed Redis on AWS, Azure and GCP, with Active-Active geo-replication and tiering.

Hosted key-value store driven by plain HTTP calls, with scoped access tokens, TTLs and Lua bucket scripts.

A copyleft (LGPL) fork of Redis 7.2.4, now limited to security backports.

Small Java key/value API for JSON objects over LevelDB, RocksDB, LMDB or MySQL; abandoned in 2014.

Microsoft's managed Redis built on Redis Enterprise, replacing the retiring Azure Cache for Redis.

Distributed JCache and memcached-compatible key-value cache built into Caucho's Resin Pro app server.

Commercial in-memory data grid for .NET and Java with parallel query, Redis support and in-cache code.

IBM's Java in-memory data grid for caching, HTTP sessions and partitioned object storage; still patched.

Microsoft's globally distributed, multi-API NoSQL and vector database with SLA-backed latency.

Memory-first distributed JSON database with SQL++, search, vector indexes and mobile sync.

Firebase's original JSON-tree database that syncs every change to connected clients in milliseconds.

Shared-nothing, auto-sharded in-memory MySQL engine built for telecom-grade availability.

SQL Server's built-in lock-free, memory-optimized OLTP engine with natively compiled T-SQL.

Couchbase's managed DBaaS: Couchbase Server clusters plus App Services sync and AI tooling.