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Postcoder enables you to add two-factor authentication to your customer workflows using SMS text messages. Reduce fake signups, impersonation and account takeovers by adding OTP verification to your website and app.
Illustration showing an OTP code being sent by SMS and entered to verify a user account.
Postcoder OTP verification provides a user-friendly way to add an extra layer of protection to your services using SMS.
Animated demo showing a user signing up, receiving an SMS one-time password, entering the code and seeing account verification succeed.
"60% of consumers intentionally provide incorrect information when submitting their details online."
Source: Verve Research
Postcoder instantly checks if a one-time password (OTP) is correct and within its expiry time.
Postcoder lets you set the code length, sender name and SMS message content to suit your application and brand.
Postcoder allows you to control how long each OTP remains valid, balancing user convenience with protection against misuse.
Prevent fake account creation and increase conversions by signing up and onboarding real customers only.
Secure your authentication flows against account takeovers to maintain the security of customer accounts.
Safeguard high-value transactions and purchases using one-time passwords to minimise payment fraud.
Verify password resets, personal detail updates and any other account changes to protect customer data.
Provide another way to recover accounts when customers lose access to the email address on their account.
Confirm customers have access to the phone number they provided to ensure you have a means to contact them.
Postcoder and its team of address and technology specialists meet the needs of high-demand applications and rapidly growing businesses.
Built on quality management best practices you can trust.
Seamlessly handles enterprise volumes and traffic spikes.
Designed for secure, privacy-first data handling.
Proven reliability to keep your integrations running smoothly.
Our engineers are on standby 24/7 to respond to service disruptions.
Fast, reliable API performance at all times, even under load.
Connect easily with your existing tech stack.
Simple, secure OTP verification via SMS without the need for apps.
Personalised setup and best-practice guidance.
Smooth transition from legacy systems or providers.
Get help via chat, email or phone - at no extra cost.
Businesses rate Postcoder 4.7 stars out of 5 on the world's most trusted software marketplace.
"Having a more simplified checkout page with the help of Postcoder has had two major benefits to our business. Faster checkouts by customers who haven't had to type in their full address, a much simpler customer journey and a major reduction in data errors; where we saw a big drop in incorrect details entered."Alex Woods Digital Marketing Executive / Victorian Plumbing
"We picked Postcoder because the API is simple to use and it supports many countries which we want to scale out to."David Annez Head of Engineering / loveholidays
"The reason we like Postcoder is that the rooftop lat/long coordinates have proven to be far more accurate than any other service and Postcoder has hugely increased our successful delivery rates."Laura Bailey E-commerce Product Manager / Pasta Evangelists
"Postcoder offers a seamless integration with our services. It is very popular with our customers."James Gutterson Commercial Manager / Signicat
"Postcoder has been great; there has been a noticeable quality increase in our campaigns. In some the pickup rate went from 30% to 60-70% and our appointment ratings for a campaign went from a 15% average to 40% for one client!"Daniel Jones IT Technician / Lead Pronto
"Postcoder is a single API that provides all the features we need... Rather than integrate several APIs, we only had to integrate one."Carl Horn Head of Digital Servicing & Customer Transformation / Capquest
"Postcoder ensures that all the address data, the mobile number and the email addresses that our customers give us are correct. It really speeds up the process for our customers."Julie Taylor Operations Director / Barrhead Travel
