Trusted by 50,000+ developers A Zernio alternative
for WhatsApp developers
Add WhatsApp to the app you already have. Run your own code, embed a ready-made inbox, and get AI help as you build.
- Free plan to start
- Unlimited AI agents and workflows
- First message in 2 minutes
Build less infrastructure
Hosted code, a ready-made inbox, and AI help in one project.
What’s included
with Kapso
See which features come with each plan.
See all features and plan limits →| Feature | Plan |
|---|---|
| Kapso Agent, CLI, MCP server, and Skills | Every plan |
| Unlimited AI agents and workflows | Every plan |
| Unlimited team members | Every plan |
| Embedded inbox | Every plan |
| Sandbox and unlimited API requests | Every plan |
| Serverless functions and logs | Every plan |
| Customer onboarding | Every plan |
| Branded customer onboarding | Platform and Enterprise |
What you pay for
Kapso charges
Start free. Upgrade for more messages, numbers, and features. Sent and received messages count toward your plan.
See pricing →Meta message fees
Meta charges separately for messages based on their type and the recipient’s country. Use the calculator to estimate these fees.
Calculate your costs →Move from Zernio to Kapso
Try your conversation flow in the sandbox. Before moving your production number, check migration eligibility and plan your API and webhook changes.
Frequently asked
questions
Yes. Send messages from your backend and receive replies through webhooks. Keep your customer data and business logic in your app. Add Kapso workflows, AI agents, or a shared inbox when you need them.
Connect a production number and create an API key. Send a template approved for your WhatsApp Business Account, then set up a webhook for delivery updates and replies. Use the message ID to match each update to the message you sent. A successful API request does not mean the message was delivered.
It depends on your setup and Meta’s rules. Check who owns the number and account, and make sure you have admin access. Eligible WhatsApp Business App numbers can stay in the app while using Kapso through coexistence. If your number uses another provider, ask Kapso to check how to move it first.
Check who owns your account and number, whether the number can move, and which templates you can keep. Review billing and update your API and webhook code. Test messages, replies, and handoff to your team before switching. Moving is not automatic, and there may be downtime.
Your Kapso plan includes a set number of messages and other usage limits. Meta message fees are separate. Depending on your account setup, you pay those fees with Kapso credits or directly to Meta. Check the pricing page and billing docs for current rates and any extra fees.
Yes. Every plan, including Free, has a shared sandbox. Register your phone and send the activation code to start testing messages, webhooks, workflows, and agents. Sending and syncing templates need a production number, so test those before launch.
Add WhatsApp
to your app
Create a project and try the sandbox with your phone. Connect a production number when you are ready to test templates and go live.