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Which OTP service to choose

First define the task class — the rest follows from it.

Quick Answer

Need a code on your user’s number → outbound OTP API (Cascade). Need a temporary number for a third-party site → SMS-activation marketplace.

Summary

Choosing an OTP service starts with: are you sending a code to your user or renting a virtual number? Cascade covers the first scenario.

Key Takeaways

  • Task class matters more than the brand.
  • Check API, channels, DX and price.
  • We do not invent competitor prices.

Related Questions

Contents

  1. Quick Answer
  2. Checklist of 6 questions
  3. When Cascade
  4. When not Cascade

Quick Answer

Do not compare “everything with everything”. First the product class, then the vendor.

Checklist of 6 questions

  1. Whose number? Your user’s or a rented one?
  2. Direction? Outbound OTP / link or inbound SMS from another service?
  3. Channels? WhatsApp, Telegram, SMS, cascade?
  4. API? REST, Bearer, OpenAPI, clear errors?
  5. Price? Transparent model in ₸/tokens, subscription fee?
  6. DX? Cabinet, history, start in minutes?

If the answers lead to outbound OTP — see Cascade : /docs, /api, /pricing.

When Cascade

  • SaaS login / invite / reset
  • Store / fintech: phone confirmation
  • Messengers cheaper than SMS needed

When not Cascade

  • Disposable / virtual numbers
  • Catching SMS from third-party sites

Next: KZ overview, vs SMS-Activate, vs 5sim.

FAQ

Where to start choosing?
Answer: whose number and which direction the message goes. Then look at channels and API.
Where are Cascade facts?
/docs, /api, /pricing and OpenAPI.
Documentation API Pricing FAQ