Cloud//Upstash

Serverless Redis and Kafka. External API — your app calls Upstash via HTTP, it doesn't run inside your server.

Serverless Redis and Kafka. External API — your app calls Upstash via HTTP, it doesn't run inside your server.

Redis-compatible: caching, rate limiting, session storage, pub/sub — all via REST API or native Redis protocol

Designed for serverless: scales to zero, pay-per-request, no persistent connection needed (works over HTTP, ideal for Vercel Functions and Workers)

Also offers QStash (message queue) and Workflow (durable execution) — overlaps with Inngest/Trigger.dev territory