Lowest Cost OTP Alternative

Free OTPs via WhatsApp & Telegram Chatbots

Deliver safe, instant one-time passwords to your global users using ChatWorks verified chatbots. Zero carrier fees, zero SMS delivery failures.

Register for Free OTPs

Developer API Integration

Deliver free OTPs programmatically with a simple POST query. Integrate using your preferred language wrapper.

curl -X POST https://www.chatworks.chat/api/free-otps/send \
  -H "Content-Type: application/json" \
  -d '{
    "email": "partner@company.com",
    "to": "+254700000000",
    "channel": "WhatsApp",
    "code": "123456"
  }'