NATS JetStream

Open-source · self-hostable · replaces 1 SaaS tool on os-alt

nats-io/nats-server · alive · ★ 19.8k · last commit today · 498 open issues

License: Apache-2.0

Good fit for Microservice meshes that want pub/sub + queue + key-value + object store from one binary, with sub-millisecond latency.

Weak at Less mature observability ecosystem than RabbitMQ; some advanced patterns require deeper NATS-specific knowledge.

In a terminal? npx -y github:SolvoHQ/os-alt-cli amazon-sqs prints the Amazon SQS comparison table including NATS JetStream. how the CLI works →

Replaces these SaaS

Amazon SQS · Message queue / async messaging
`docker run -p 4222:4222 -p 8222:8222 nats:latest -js -m 8222`. Client migration: NATS clients exist for 40+ languages; the JetStream API gives you durable streams + consumers (the SQS-equivalent). Map an SQS queue to a JetStream stream with a single durable consumer. DLQ via `MaxDeliver` + `republish` to a separate stream.

README badges for the SaaS this replaces

Maintainers and forks: drop a badge in your README to link readers from the SaaS-comparison page back to your repo.

/amazon-sqs/

FAQ

Is NATS JetStream actively maintained?

Yes — last commit today. The repository is alive (commit activity within the past 90 days).

What does NATS JetStream cost to self-host?

NATS JetStream is free and open source under Apache-2.0. Typical self-host VPS cost: $5-10/mo VPS — Go binary is light; clustering is straightforward.

Which SaaS does NATS JetStream replace?

NATS JetStream is listed as an open-source self-host alternative to: Amazon SQS.