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Alternatives · Key-Value & Cache

Upstash alternatives (2026)

Upstash: Redis that fits the serverless model perfectly.

Its Catch: HTTP adds latency compared to native Redis protocol.

Below: 4 free or free-tier tools from the same category (key-value stores and caches), free and open source first, then the closest match by shared tags. Each keeps its own Catch.

  1. 1.RedisThe in-memory data store everyone uses

    Free / OSS · RSALv2/SSPLv1/AGPLv3 · 77k GitHub stars

    VerdictThe default choice for caching and session storage.

    CatchLicense: not MIT. Since Redis 8 the server is tri-licensed RSALv2 / SSPLv1 / AGPLv3 at your choice — AGPLv3 is the only OSI option and carries network copyleft; 7.4–7.x was RSALv2/SSPLv1 only. If you need BSD-3 Redis-protocol, look at Valkey. Memory-bound storage is expensive at scale. Persistence options have tradeoffs. Clustering adds complexity.

  2. 2.ValkeyBSD-3-Clause forever-OSS Redis-protocol KV after the license fork

    Free / OSS · BSD-3-Clause · 27.5k GitHub stars

    VerdictBSD-3 forever-OSS Redis protocol. Fork lane, not a speed upgrade.

    CatchForever-OSS Redis-protocol fork lane, not Redis but faster. Valkey is the license/governance fork, not a performance twin. Don’t assume a managed free tier.

  3. 3.etcdApache-2.0 Raft key-value store underneath Kubernetes

    Free / OSS · Apache-2.0 · 52.4k GitHub stars

    VerdictThe proven store for cluster coordination and config — keep it small and run it as a proper cluster.

    CatchIt is built for small, strongly consistent data, not as a message queue, cache or bulk store: values and total database size are meant to stay small, and every write goes through consensus. Production means running a cluster of three or five nodes on fast disks and handling backups, compaction and defragmentation yourself. For an app database, use Postgres; reach for etcd when you need coordination.

  4. 4.GarnetMIT Redis-protocol cache-store from Microsoft Research

    Free / OSS · OSS/MIT · 12.1k GitHub stars

    VerdictA serious MIT alternative to Redis when throughput per box matters — test your command set first.

    CatchRESP compatibility is not full Redis: check your exact commands and modules against Garnet's API docs before swapping it in. Custom extensions are written in C#/.NET, so this fits best in a .NET team. The headline latency numbers come from the project's own benchmarks on Azure VMs. The managed Azure Cosmos DB Garnet Cache is a separate paid service; the OSS server is free.

FAQ

What are the best free alternatives to Upstash?
Redis, Valkey, etcd, Garnet. All are reviewed on Stack Gems in the same category (key-value stores and caches); 4 free or open source.
What is the catch with Upstash?
HTTP adds latency compared to native Redis protocol.
Is there an open-source alternative to Upstash?
Yes: Redis (RSALv2/SSPLv1/AGPLv3), Valkey (BSD-3-Clause), etcd (Apache-2.0), Garnet (OSS/MIT).

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