Postcoder Reviews & Product Details

Postcoder is a powerful API that brings fully integrated validation features to your customer onboarding forms, helping you capture accurate customer data while boosting form completion rates. Features include: - Address lookup: Capture addresses 5x faster with zero typos - Bank validation: Verify bank accounts for direct debits and money transfers - Email and mobile validation: Capture valid contact details from your customers - OTP verification: Protect customer accounts with one-time password SMS verification Over 9,000 organisations across the UK and globally trust Postcoder to enhance customer onboarding by improving data quality while reducing friction at critical touchpoints. Postcoder provides everything your business needs: - Enterprise-grade performance - ISO 9001 certified - PCI-DSS and GDPR compliant - Dedicated specialist for onboarding - 24/7 response for critical issues - Free multi-channel support Start capturing clean, verified customer data effortlessly while reducing drop-offs and errors. Add Postcoder to your forms today and transform your onboarding journey.

Product Website

Seller

Allies Computing

Discussions

Postcoder Community

Languages Supported

English

Product Description

Postcoder is the API for address lookup and form validation. Create a quick and accurate data capture experience for your websites and apps.

Overview by

Jasmine Robinson Madden

Pricing

Pricing provided by Postcoder.

Free trial

Free Trial

View More Pricing Information

Postcoder Integrations

(1)

Verified by Postcoder

Postcoder Media

Postcoder API returning valid email, mobile number, and address autocomplete.

Admin area on mobile and desktop.

Postcoder Demo - Postcoder rooftop geocoding

Code sample returning rooftop coordinates.

Email validation API javascript sample code from the Postcoder docs.

Mobile validation API javascript sample code from the Postcoder docs.

Postcoder Demo - Address autocomplete API

Address autocomplete API javascript sample code from the Postcoder docs.

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paul W.

Principal Consultant

Small-Business (50 or fewer emp.)

11/7/2024

"PW Digital - Postcoder"

4.5/5

What do you like best about Postcoder?

Loved the ease of use API - also the European country support worked well Review collected by and hosted on G2.com.

What do you dislike about Postcoder?

previous website was a bit clumsy but is now much improved Review collected by and hosted on G2.com.

Response from Jasmine Robinson Madden of Postcoder

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Hi Paul, thank you for the positive feedback on the ease of API use and the quick support you received. We understand your concerns about the website navigation and will work on improving the user experience. Many thanks for taking the time to leave us a review.

Daniel H.

Senior Software Engineer

Insurance

Small-Business (50 or fewer emp.)

5/21/2025

"Quick and easy Address lookup"

5/5

What do you like best about Postcoder?

Postcoder is super straightforward to use and does exactly what I need it to—quick and accurate address lookup. The API is fast and reliable, and the setup was simple. Theres multiple options for address search and we are able to experiment with different options. The documentation was easy to follow and included everything I needed Review collected by and hosted on G2.com.

What do you dislike about Postcoder?

Only thing to raise would be making it easier to do admin things like managing users. Review collected by and hosted on G2.com.

Response from Rachel Potter of Postcoder

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Thanks so much for your review; we're really pleased you've found Postcoder reliable, easy to use and flexible to your needs. We also appreciate your feedback on managing users - our developer team are already actively working on improvements in that area but in the meantime if you have anything you need assistance with then please just get in touch and we'd be happy to help.

Mark B.

Director

Information Technology and Services

Small-Business (50 or fewer emp.)

5/20/2025

"Simple, cheap and just works"

5/5

What do you like best about Postcoder?

It has an API that's easy to use and implement, and it just works. I like the notifications that are sent so you can keep an eye on usage amount and credits remaining. Support (the couple of times I've needed it) has been great. Review collected by and hosted on G2.com.

What do you dislike about Postcoder?

I can't think of anything negative at the moment Review collected by and hosted on G2.com.

Response from Rachel Potter of Postcoder

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Hi Mark, thank you very much for your review. It’s great to know the usage notifications are helping you stay in control, and that support has been there when needed!

Verified User in Accounting

Small-Business (50 or fewer emp.)

5/27/2025

"It just works for us!"

5/5

What do you like best about Postcoder?

Postcoder is simple, reliable and cost effective. It just works. The only time I have to think about is, is to add credits :) Review collected by and hosted on G2.com.

What do you dislike about Postcoder?

We're using postcoder for a long time now, i'd like that if we ever run into an insufficient credit issue - it will add some to keep us going until it gets resolved. This has only happened once in 5 years. Review collected by and hosted on G2.com.

Response from Rachel Potter of Postcoder

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Hi, thank you for the great review — we’re delighted to hear Postcoder has been a reliable and cost-effective solution for you over the years. Just so you know, we do offer an auto top-up feature to help prevent credit issues, and we’d be happy to help you get that set up so please just get in touch.

Verified User in Retail

Mid-Market (51-1000 emp.)

2/18/2025

"Postcoder delivers accurate data, great support, and a smooth experience"

5/5

What do you like best about Postcoder?

We tried a number of different address lookup services before deciding to go with Postcoder.

Not only did we receive the most accurate address and location data from postcoder, but the help we received from the support team (especially Kit) and the easy to navigate admin portal made it an easy decision.

The API is fast to respond to requests. We haven't had any issues since switching to Postcoder Review collected by and hosted on G2.com.

What do you dislike about Postcoder?

If I had to point out a downside, it would be that we didn't have enough credits to for our testing, so we had to request more. However the support team was quick to fix this issue for us Review collected by and hosted on G2.com.

Response from Rachel Potter of Postcoder

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Hi, we're delighted to hear that you're pleased with the accuracy of our data and the level of service we provide. And thank you for your feedback about the credits available for testing; we will take that into consideration when we review this process.

Jim F.

CEO & Founder

Small-Business (50 or fewer emp.)

11/11/2024

"Really easy to implement with strong coverage and data quality"

5/5

What do you like best about Postcoder?

Ease of use of their APIs, was simple to implement. Review collected by and hosted on G2.com.

What do you dislike about Postcoder?

Find the billing challenging (lots of prompts to top up), but its all good. Review collected by and hosted on G2.com.

Response from Jasmine Robinson Madden of Postcoder

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Hi Jim, we're delighted to hear that you found Postcoder easy to use and you're achieving better conversion rates because of it. Thanks for your feedback about billing prompts, we'll take that into consideration as we review the billing processes. Our Sales team are always happy to help if you think that you could benefit from being on a different billing package, feel free to get in touch with them on sales@alliescomputing.com. Thank you for taking the time to leave a review.

Richard C.

Small-Business (50 or fewer emp.)

5/20/2025

"Great product which integrates into our Orderwise system and saves time and improves efficiency !"

5/5

What do you like best about Postcoder?

Ease of use & Price. Great system that integrates well. Review collected by and hosted on G2.com.

What do you dislike about Postcoder?

There's really nothing we dislike about the software. Review collected by and hosted on G2.com.

Response from Rachel Potter of Postcoder

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Hi Richard, thanks for your review. We're really glad you are pleased with Postcoder; it's nice to receive a review which is clear and concise!

Stephen B.

Technical Lead

Renewables & Environment

Small-Business (50 or fewer emp.)

6/14/2024

"99.99% reliable service, short term caching recommended."

5/5

What do you like best about Postcoder?

Works well, response is fast and in at least 5 years of use I think there has only been 1 issue which prevented postcode lookups from the service.

UI is clear and easy to use, and recently been improved.

There is also an api endpoint which you can connect your moniotoring system to so you can track remaining credits along with your other key system metrics.

Lots of extra info like latitude, longtittude, udprn, etc. Review collected by and hosted on G2.com.

What do you dislike about Postcoder?

1. The json endpoint for monitoring required contacting suport to find out about, after an incident when we ran out of credits. Docs have been updated, it's part of the /status request.

2. When you need to change payment method you have to purchase a new pack and set it up as auto top up, and then delete the original auto top package - rather than just being able to update you card details.

3. Not sure if there is a caching mechanism meaning that if you are not proactive a single user, or bad bit of code, can burn your credits down quite a bit on the same lookup.

4. Some postcodes have more addresses than the max response, another little gotcha. Be sure to check for the paging key which only appears when this is the case! Review collected by and hosted on G2.com.

Response from Jasmine Robinson Madden of Postcoder

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Hi Stephen, thank you for your review and taking the time to share your thoughts. Glad to hear you find the UI easy to use and the response fast, and that you've seen improvement over the last 5 years. We're always working to improve our documentation too, and we take all user feedback into account. I've included a link below to the pagination section of our docs in case anyone else has a similar issue. We are also currently working to simplify the process of updating payment methods - I appreciate it's a current pain point! Many thanks again for your review.

See how Postcoder improved

Chris P.

Technical Director

Small-Business (50 or fewer emp.)

8/27/2024

"Postcoder works well"

4.5/5

What do you like best about Postcoder?

The most important reason to use any address, bank or email checking service is it's reliability in giving you the correct answer. We have found Postcoderweb to be the gold standrad for this.

We needed to integrate Postcoderweb and othere APIs into our Oracle Apex based product (verify-it.co.uk) and found that Postcoderweb made that easy for us to do. Review collected by and hosted on G2.com.

What do you dislike about Postcoder?

Nothing really, everything works well. When we have had issues we get quick answers from their helpdesk. Review collected by and hosted on G2.com.

Response from Jasmine Robinson Madden of Postcoder

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Hi Chris, thanks so much for your review. We're thrilled to hear that Postcoder has been the gold standard for reliability and ease of integration for your product. We also appreciate hearing that our support team were efficient in responding to your issue. Thanks for choosing Postcoder for verify-it.co.uk!

Verified User in Insurance

Small-Business (50 or fewer emp.)

11/7/2024

"Exactly what we needed"

5/5

What do you like best about Postcoder?

Simple to integrate, clean verified addresses, easy to use for our end users. Helpful and quick responses from the support team. Review collected by and hosted on G2.com.

What do you dislike about Postcoder?

Certain datasets like the Eircode directory have limitations as to their trial usage that limits the amount of time development teams can have to integrate and test. There really should be a means to have unlimited development access to data and APIs without credit usage for those that have a production license. Review collected by and hosted on G2.com.

Response from Jasmine Robinson Madden of Postcoder

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We're glad to hear that you find Postcoder simple to integrate and easy to use for your end users. We strive to provide helpful and quick support to all our customers. We do understand your concerns about limitations on trial usage for certain datasets. Some datasets have licensing requirements that prevent us from offering unlimited trial or development usage. We will take your feedback on this into consideration as we continue to improve our services, particularly for users in the development phase. Many thanks for taking the time to leave a review.