SendZen
WhatsApp API for developers
SendZen is a WhatsApp Business API platform for developers that provides direct access to the official WhatsApp Platform, handling infrastructure such as template management, webhook management, and opt-in management so teams can focus on their own product. It supports sending utility, marketing, and authentication messages, and is an official Meta Business Partner.
The platform offers SDKs for Node.js, Python, and other languages, predictable webhooks for delivery, read receipts, and inbound messages, and real-time request and response logging in the dashboard. Additional capabilities include a test mode, WhatsApp Embedded Signup, WhatsApp Business App number support, WhatsApp Voice API, and a partner/reseller program with a white-label toolkit for platforms and SaaS businesses.
SendZen is aimed at developers, product teams, and software partners or resellers. Pricing is packaged as monthly or yearly developer plans with a free tier for testing and prototypes, alongside paid tiers that bundle message credits and scale in included numbers, users, and support levels; whitelabel partner pricing is also available. Additional credits can be purchased as a top-up, and Meta's conversation fees are billed separately from the platform subscription.
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