What it does
Sending WhatsApp messages at volume risks the one thing you can't get back: your number's standing with Meta. Send too fast, to the wrong list, with the wrong template, and quality drops, then throughput drops, then messages stop delivering at all.
Sendout sits between your contact list and Meta's rate limits. It paces sending automatically, warms a new number safely before it takes real volume, and watches quality in real time so one bad batch doesn't take the whole number down with it. None of this is a setting Meta gives you directly, it's logic built from watching what actually throttles accounts at scale.
Underneath: token-bucket rate limiting per number, idempotency keys on every send, circuit breakers that pause a queue automatically when error rates spike, and webhooks for delivery state instead of polling.
You're seeing messaging limits, number quality degradation, Meta restrictions, or poor delivery rates
A send has gone wrong before: throttled, flagged, or a number that stopped delivering
You're sending enough volume that a naive loop calling the API directly will eventually get you throttled or banned
You want queue depth, retries, and backoff handled, not hand-rolled
How it works
1
Connect your list
Upload contacts or connect your CRM. No code required.
2
Describe the campaign
Say who it's going to and what it should say, in plain English.
3
Send safely
Sendout paces delivery, respects the warming schedule, and slows down automatically if quality drops.
What is happening behind the hood: the audience gets resolved from the warehouse query, split into batches sized to your current tier, queued through the rate limiter, and dispatched with retry and idempotency handled automatically.
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Frequently asked questions
Can I use this for order and delivery notifications, not just marketing?
Yes, that's most of what runs through here day to day: order confirmations, delivery updates and appointment reminders at volume, with the same safeguards as a marketing campaign.
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What happens when I hit my tier limit?
Sends past your tier ceiling queue rather than fail. Once your tier goes up, quality rating stays healthy, or the 24-hour window resets, queued sends continue automatically.
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Do I need to know what a quality rating or a warming schedule is?
No. Describe who you're sending to and what it should say, and Sendout handles the pacing, the warming and the quality checks behind it.
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Why not just call the WhatsApp Business API directly, or use an unofficial library?
At low volume, you can. At real volume, you're rebuilding a token-bucket rate limiter, retry logic with idempotency, and quality-rating monitoring, the exact things that break silently at 2am and take a number down with them. Unofficial libraries carry the added risk of sitting outside Meta's terms of service entirely.
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Can I embed this into my own product instead of using it standalone?
Yes. The API is built to sit inside any product that needs to send WhatsApp at volume.
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