What are the best free alternatives to etcd?

Redis, Valkey, Garnet, Upstash. All are reviewed on Stack Gems in the same category (key-value stores and caches); 3 free or open source, 1 hosted with a real free tier.

Is there an open-source alternative to etcd?

Yes: Redis (RSALv2/SSPLv1/AGPLv3), Valkey (BSD-3-Clause), Garnet (OSS/MIT).

Alternatives · Key-Value & Cache

etcd alternatives (2026)

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

Its Catch: It 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.

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.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.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.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.
4.UpstashServerless Redis and Kafka
Free tier · Freemium
VerdictRedis that fits the serverless model perfectly.
CatchHTTP adds latency compared to native Redis protocol. High-throughput workloads get expensive. Some Redis features are not available.

FAQ

What are the best free alternatives to etcd?: Redis, Valkey, Garnet, Upstash. All are reviewed on Stack Gems in the same category (key-value stores and caches); 3 free or open source, 1 hosted with a real free tier.
What is the catch with etcd?: It 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.
Is there an open-source alternative to etcd?: Yes: Redis (RSALv2/SSPLv1/AGPLv3), Valkey (BSD-3-Clause), Garnet (OSS/MIT).

etcd alternatives (2026)

FAQ

More