
WhatsApp Business Message Templates: How to Create and Get Approved
Templates get rejected for the smallest reasons. Learn the WhatsApp message categories, approval rules, and pricing before you submit your next one.

WhatsApp Broadcast Messages Explained: Limits, App vs API
Two ways to send WhatsApp broadcasts. The Business App caps you at 256 contacts with no analytics. The API removes both limits. Step-by-step guide.

WhatsApp Week: what Zernio shipped in 5 days
Five days, four WhatsApp releases: Workflows, phone numbers in 53 countries, Calling, and Flows. Here's what we shipped, why it mattered, and what happened when we put it on Product Hunt.

WhatsApp Business API vs WhatsApp Business App: Key Differences
WhatsApp Business App works for small businesses managing conversations manually. The API is built for teams that need automation, integrations, and scale. Here's how to choose, and how to skip the setup complexity.
Best WhatsApp Business API Providers in 2026
We ranked the best WhatsApp Business API providers for developers and SaaS teams — covering setup, pricing, automation, and multi-channel support.
WhatsApp Flows: build interactive forms with Zernio API
WhatsApp Flows let you collect structured data with native in-chat forms, surveys, and booking screens. Create, send, and track them through the Zernio API.
WhatsApp Calling API: route calls to AI voice agents or any number
WhatsApp Calling lets customers voice-call your business from inside the chat. Route each call to a phone line, SIP, or an AI voice agent through Zernio.

Buy a WhatsApp Business number in 50+ countries
Buy a WhatsApp Business number in 53 countries from $2/mo, then build your entire WhatsApp experience on Zernio and the official WhatsApp Business API.
WhatsApp Business API Pricing: How It Works & What's Better
See how WhatsApp Business API pricing works in 2026: template categories, country rates, volume tiers, and a simpler way to estimate your messaging costs.

Introducing WhatsApp Workflows: build chatbots and AI agents
WhatsApp Workflows is a visual builder for chatbots and AI agents. Build one no-code in the dashboard, through the API, or with an MCP agent.
Start building with Zernio.
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