Upstash QStash

Deferred queue alternative — 500 msg/day free, held in reserve

Upstash QStash

Status

Deferred. Held in reserve as a documented swap target if Cloudflare Queues hits a quota cliff or a feature we need lands in QStash first.

QStash is an HTTP-first serverless message queue — producers POST to a URL, consumers receive a webhook callback. It works from any runtime (not just Workers), supports scheduling, retries, and dead-lettering, and the free tier (500 messages/day) is plenty for non-batched workloads but tighter than Cloudflare Queues’ 1M/month allowance. Email-only signup, no card.

Cross-refs

• Cloudflare Queues — primary
• Inngest — sibling deferred alternative
• Cloudflare-native queue decision

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