Lowest Cost OTP alternative

Free OTPs via WhatsApp & Telegram Chatbots

Deliver safe, instant one-time passwords (OTPs) to your global users using ChatWorks verified chatbots. Zero carrier fees, zero SMS delivery failures. SEO optimized lowest cost OTPs and free OTP gateway services for global enterprises.

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"
  }'