SMS, WhatsApp, email, voice and OTP codes: one engine to send, track and bill, with cascade routing and a white-label reseller console.
SMS
True GSM-7/Unicode segmentation, per-segment billing and delivery reports.
WhatsApp Cloud
Official Meta API: templates, buttons, media and incoming conversations.
Paired WhatsApp
Your own WhatsApp numbers paired by QR, at reduced cost. Unofficial mode, outside Meta's WhatsApp Business API: WhatsApp may restrict or ban a paired number.
Transactional email with verified sender signatures: spoofing is blocked before send.
Voice
Text-to-speech voice calls: codes and alerts read out to the recipient.
Verification
The Verify API: one-time codes generated and checked by senndo, with fallback to a second provider.
Switch between channels without changing your API.
Automatic fallback between providers when a route fails.
Retry a request safely: the same message is never sent or billed twice.
Delivery events pushed to your endpoint, signed so you can verify their origin.
SMS billed per real segment, with delivery reports on every message.
Email sender signatures verified before anything leaves the platform.
Resell messaging under your own brand, with your own customers and prices.
senndo is a product of ZeroSuite, Inc., a Delaware C Corporation. Its use is governed by the ZeroSuite legal documents, including the Messaging Policy and, where senndo processes personal data on your behalf, the Data Processing Agreement.