OTP Verification Service. Verify your customers via messengers and SMS with savings of up to 40%
Use messengers and SMS to send one-time passwords and confirmation codes. For authentication, user authorization, and other tasks. Save up to 40% with Telegram Gateway (OTP) and multichannel messages.
Why do technical directors and CRM managers choose OTP Messaggio?
99,9% delivery rate
Messages sent via messengers are delivered instantly, with near 100% delivery success.
Savings of up to 40%
Messages in instant messengers are cheaper than SMS, with savings of up to 40% — especially noticeable for international messages.
Enhanced fraud protection
Limits on sending messages per hour/day/month by destination. Flexible settings for TTL, rate limits, etc.
Multichannel messages
Ability to select channel and scenario priority based on user country.
Additional benefits of OTP messages for businesses
Enhanced security
OTPs protect against account hacking, password guessing, and fraud attacks. This contributes to user safety and protects your business reputation.
Saving development team resources
Messaggio’s OTP can be deployed and used immediately. You don’t need to spend months and hundreds of thousands of pounds creating and maintaining your own OTP system.
Increased user loyalty
Guaranteed delivery of codes through various channels means that users will not ‘drop out’ at the authorization, payment confirmation, etc. stages. This increases their loyalty to the company and reduces your financial losses.
Save up to 40% of your budget on OTP messages with Messaggio
Current Cost (Excluding VAT)
| Channel | Channel Share | Minimum Fee / Subscription, € | Cost per Message, €* | Number of Messages | Total, € |
|---|---|---|---|---|---|
| SMS | 100% | 0 | 0,1129 | 50 000 | 5 643 |
Cascading OTP Cost Calculation (Excluding VAT)
| Channel | Channel Share | Minimum Fee / Subscription, € | Cost per Message, €* | Number of Messages | Total, € |
|---|---|---|---|---|---|
 Viber | 35% | 200 | 0,0022 | 17 500 | 200 |
| Whatsapp | 15% | 50 | 0,0757 | 7 500 | 568 |
| SMS | 50% | 0 | 0,1129 | 25 000 | 2 822 |
| Total | 100% | — | — | — | 3 390 |
| * The average massage prices for Eastern Europe have been taken as a reference. | |||||
| Total Messages per Month | 50 000 |
|---|---|
| Savings, € | 2 253 |
| Savings, % | 39,9% |
Calculate the benefits of implementing OTP Messaggio for your project
A Messaggio manager will calculate the cost of OTP messages for your messages volumes at a more favourable price than your current one. The manager will show you where you are losing money and how you can save with Telegram OTP and multichannel messages.
Everything you need to work with OTP in one plan
We have gathered everything you need to work with OTP messages in our service. For €49 per month, you get unlimited functionality for working with technical messages, up to 40% savings on OTP, and minimization of financial and reputational risks due to undelivered messages or spam attacks.
+ message cost from €0.008
Only for new customers until 31 March 2026
- built-in Telegram Gateway (OTP)
- OTP code generation and storage
- code validity check
- setting limits/restrictions on requests from spam and bots
- separate channel configuration scenarios by country
- TTL and rate limit configuration
- multichannel messages (Viber, SMS, Telegram, etc.)
Two options for OTP integration: self-implementation or with Messaggio
Self-implementation
Your team will need to handle:
- OTP code generation and storage
- Code lifecycle management (TTL)
- Code invalidation
- User session creation and management
- Code verification and retry requests
- Anti-fraud measures (tracking delivery by country/user, managing limits)
For multi-channel cascade delivery:
- Research and integrate with providers for each channel
- Develop cascade delivery logic
- Maintain multiple API integrations
With Messaggio, it’s easy
We handle all processes for you. Simply use our API key
- Easy-to-use API
- SDK for seamless integration
- Ready-to-use authentication forms
Who benefits from OTP with Messaggio?
- Online schools: for access to online lessons and registration confirmation
- Travel services: to verify bookings and check-in
- Logistics companies: for package delivery confirmations and courier authentication
- E-commerce platforms: to confirm orders and authenticate loyalty programs
- Social media & dating apps: to verify user identities
- Banks: to prevent unauthorized account access
- SaaS products: to activate critical features or update sensitive user data
Frequently Asked Questions
A one-time password or OTP is a special security code consisting of symbols and numbers. The user automatically receives and enters it when attempting to log into their personal account, when making a transaction, and when performing other important actions. This ensures a high level of user security and minimizes the risk of fraudulent schemes.
There are several integration options. The simplest one for you is to do everything through Messaggio. We generate OTP messages on our end, send them as a cascade mailing, etc. All you need to do is connect to our service and provide us with the phone numbers of users for whom we will generate OTPs.
The second option is for more experienced users and those who already have their own security system on their website, web service, or application. You send Messaggio the phone numbers of users for OTP and your ready-generated code. Messaggio will only send the code, but will not participate in its verification.
We support sending one-time passwords to users via SMS, Viber, and Telegram. WhatsApp will be added soon. You can change the order of channels for cascading distribution.
The price consists of the monthly Messaggio plan of €49 and the cost of OTP messages at the rates of mobile operators and your chosen messengers. We will calculate the price based on your message volumes and selected channels.
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