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OTP & Verification SMS

One code.
Verified in seconds.

Deliver one-time passwords, login codes and verification messages reliably at scale. Direct routes, smart retries and full delivery visibility.

Explore the conversation ↓
One-time passwordsVerification codesSecure delivery

One message.
A useful next step.

A considered message, a natural reply and a clear handoff. Explore three ways the platform can support your business.

Message workspaceLocal preview

Transactional SMS

Make the message
feel considered.

Messageotp_login
Message body

Your MyApp verification code is 847291. Valid for 5 minutes. Do not share this code.

Login OTPs are time-limited, single-use and never shared. Retry logic handles delivery gaps.

NorthlineIllustrative business
Conversation preview

Your MyApp verification code is 847291. Valid for 5 minutes. Do not share this code.

10:24

I didn't receive the code.

10:25

A new code has been sent. Please check your messages.

10:25
Context ready for your team

No phone number, account or live message is connected.

Keep the conversation.
Carry the context.

A shared inbox and connected tools give people a useful place to step in. Automation supports the handoff.

Alex / Customer enquiry
Customer

I’d like to discuss a new project. Can your team help?

Prepared context

A conversation with a next step.

Interest
New project enquiry
Source
WhatsApp conversation
Next action
Team review

Context attached.Ready for the team.

Messaging starts
with the foundations.

Account setup, useful message design and the right integration. The scope follows your business and your tools.

SMS Delivery Platform
Number provisioning & routing

Select and configure the right sender type—long code, short code or alpha sender—for your region and use case, with direct carrier routes for reliability.

Template & compliance management

Prepare message templates within regulatory requirements. Agree DND compliance, consent handling and applicable local messaging rules before sending.

Delivery tracking & receipts

Monitor delivery status, failed attempts and carrier feedback in real time. Webhook callbacks or dashboard access based on your integration preferences.

Smart retry logic

Configure retry intervals and fallback routes for undelivered messages. Balance delivery speed with carrier policies and user experience.

API & platform integration

Connect your authentication or payment platform via REST API, SDK or webhook. Standard integration patterns and clear documentation agreed during setup.

Analytics & reporting

Track delivery rates, latency and failure reasons by route and region. Use the data to optimise performance and inform infrastructure decisions.

Different businesses.
Useful conversations.

Design the journey around the people you serve and the work your team needs to do.

Order confirmations, shipment updates and a straightforward route to product support.

A considered route
to going live.

Set the foundation.

Review your use case, account, number and onboarding requirements.

Connect the workflow.

Prepare messages, integrations and the handoff your team needs.

Test, then launch.

Validate the flow, check access and agree ownership before activation.

What is OTP & Verification SMS?

OTP SMS is a high-priority messaging service designed to deliver time-sensitive verification codes — one-time passwords, PINs and auth tokens — to users in seconds. Unlike standard bulk SMS, OTP routes bypass promotional queues and use direct carrier connections to guarantee near-instant delivery. This makes OTP SMS the standard method for two-factor authentication (2FA) and transaction verification.

What you get

Priority Routing

OTP messages bypass standard queues for delivery in under 5 seconds.

Expiry & Retry Logic

Set code expiry windows and automatic retry if the first attempt fails.

API Integration

Simple REST API with SDKs for all major languages and frameworks.

Failover to Voice OTP

If SMS delivery fails, the system can escalate to a voice OTP call automatically.

Global Reach

Send OTP to numbers in 180+ countries with local routing for best delivery.

Delivery Receipts

Confirm delivery at the carrier level for audit and compliance requirements.

How businesses use it

SaaS PlatformsTwo-factor authentication for login and sensitive account changes.
E-commercePayment confirmation codes, address verification and order authentication.
Banking & FintechTransaction authorisation codes and account recovery verification.
Healthcare PortalsPatient portal login, prescription authorisation and record access.

How to get started

01

Integrate

Add the OTP API to your app with a single endpoint — 15-minute integration.

02

Generate

Your system triggers the OTP request; we generate and deliver the code.

03

Verify

The user enters the code; your system confirms against the API response.

Clear answers.
Before we connect.

Which countries do you support?

Coverage depends on the selected routes and providers. We review your target markets and recommend the appropriate sender types and routes before implementation.

How fast is delivery?

Delivery speed varies by carrier, country and route. Direct carrier connections typically achieve faster delivery times. We agree expected SLAs during setup.

Do you handle DND and consent compliance?

Yes. We review local regulatory requirements and configure the appropriate compliance controls before you send. Ongoing compliance is your team's responsibility with our initial guidance.

Can we use a branded sender name?

Alpha sender IDs are available in supported markets. Some markets require pre-registration. We review eligibility for your use case and target countries.

What happens if a code isn't delivered?

Retry logic and fallback routes can be configured around your requirements. We agree the retry strategy, maximum attempts and fallback channel during setup.

Make your next conversation
work better.

Tell us what you need

Let's connect.

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