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Inbox OSS

Use case · Notifications

System alerts, daily digests, and product nudges — at scale

High-volume, low-latency, well-categorized notifications with per-user frequency caps and unsubscribe groups baked in.

Category-aware sends

Per-category unsubscribe means one mute won't silence everything.

High throughput

Burst rates of 100k+/min on Pro. Backpressure stays our problem, not yours.

Frequency caps

Set a max-per-day / max-per-week per recipient to protect your reputation.

Digest batching

Coalesce 30 events into one daily digest using templated lists.

Live observability

Real-time queue depth, accept latency, and per-tenant rate visualizations.

Open/click signal

Feed engagement back into your product to trim noisy notifications automatically.

Start sending email in under 5 minutes.

Free plan includes 3,000 emails/month forever. No credit card required.