Introducing G2.ai, the future of software buying.Try now

Postcoder Reviews & Product Details

Postcoder Overview

What is Postcoder?

Postcoder is an API with a fully integrated set of validation features for your customer onboarding forms. Add one or more features to your existing form and watch conversion rates and data quality improve. - Address lookup Use postcode lookup or autocomplete to capture addresses 5x faster with zero typos - Rooftop geocoding Get coordinates for addresses around the world - Bank validation Verify bank accounts for direct debits and money transfers - Email and mobile validation Capture valid email addresses and mobile phone numbers from customers and prospects - OTP verification Protect customer accounts with one-time password SMS verification Why use Postcoder? Postcoder helps over 9,000 organisations in the UK and worldwide achieve measurable improvements in their form conversions and data quality. After integrating Postcoder, many report increased onboarding numbers, faster form completion, and a surge in quality leads.

Postcoder Details
Product Website
Languages Supported
English
Show LessShow More
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.

How do you position yourself against your competitors?

As a 100% employee-owned company, the Allies team is uniquely dedicated to providing exceptional support to Postcoder customers and those interested in using Postcoder. From pricing questions to technical queries, we're ready to help.

Postcoder is trusted by over 9,000 organisations of all sizes to offer a flexible API with supreme reliability, offering:

- Address lookup and autocomplete for 244 countries worldwide
- Daily updates of Royal Mail PAF data
- Free support to all customers
- 700k+ API requests per average day
- 99.99% historical uptime
- Comprehensive dev docs
- One easy-to-use API that aggregates a vast array of global data sources


Seller

Allies Computing

Description

Allies is a leading provider of address and location technology with over 35 years of experience. Allies is a 100% employee-owned company with a 100% remote team, serving organisations worldwide.

Overview Provided by:

Postcoder Integrations

(1)
Verified by Postcoder

Recent Postcoder Reviews

Tim H.
TH
Tim H.Small-Business (50 or fewer emp.)
4.5 out of 5
"Been using Postcoder for years and it works great for us and our customers!"
Postcoder just reliably works in the background, giving our customers easy and reliable data so they can check out quickly and we get accurate data...
Verified User
A
Verified UserSmall-Business (50 or fewer emp.)
5.0 out of 5
"It just works for us!"
Postcoder is simple, reliable and cost effective. It just works. The only time I have to think about is, is to add credits :)
DH
Daniel H.Small-Business (50 or fewer emp.)
5.0 out of 5
"Quick and easy Address lookup"
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 t...

Postcoder Media

Postcoder Demo - Postcoder API
Postcoder API returning valid email, mobile number, and address autocomplete.
Postcoder Demo - Postcoder admin area
Admin area on mobile and desktop.
Postcoder Demo - Postcoder rooftop geocoding
Code sample returning rooftop coordinates.
Postcoder Demo - Email validation API
Email validation API javascript sample code from the Postcoder docs.
Postcoder Demo - Mobile validation API
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.
Answer a few questions to help the Postcoder community
Have you used Postcoder before?
Yes

47 Postcoder Reviews

4.7 out of 5
The next elements are filters and will change the displayed results once they are selected.
Search reviews
Hide FiltersMore Filters
The next elements are filters and will change the displayed results once they are selected.
The next elements are filters and will change the displayed results once they are selected.
47 Postcoder Reviews
4.7 out of 5
47 Postcoder Reviews
4.7 out of 5

Postcoder Pros and Cons

How are these determined?Information
Pros and Cons are compiled from review feedback and grouped into themes to provide an easy-to-understand summary of user reviews.
Pros
Cons
G2 reviews are authentic and verified.
Tim H.
TH
Director
Small-Business(50 or fewer emp.)
More Options
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review
What do you like best about Postcoder?

Postcoder just reliably works in the background, giving our customers easy and reliable data so they can check out quickly and we get accurate data then for our delivery partners. It was easy to set up and never seems to be out of action or need amendments from us leaving us free to get on with what we need to do in other areas of the business! Review collected by and hosted on G2.com.

What do you dislike about Postcoder?

Cant think of any to be honest! Maybe a small monthly fee option would be better than periodic top ups? Review collected by and hosted on G2.com.

What problems is Postcoder solving and how is that benefiting you?

It helps us by making checkout easier for our customers therefore increasing the likelyhood of spending with us. It also helps us get consistent address data for our delivery partners meaning they are less likely to have address issues meaning missed deliveries and upset customers and increased work load for our customer service team. Review collected by and hosted on G2.com.

Response from Rachel Potter of Postcoder

Hi Tim, thank you for your loyal support and for sharing such positive feedback — it’s great to hear Postcoder is making a real difference for both your customers and your team. We appreciate your suggestion about a monthly fee option for smaller use customers and I will pass this onto the team for consideration.

JG
Head of Engineering
Small-Business(50 or fewer emp.)
More Options
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review
What do you like best about Postcoder?

The ease of use and their documentation is superb. Allowing me to hook up to the service very easily. They also have a wide offering of services that I haven't taken full advantage of yet, but nice to see they have a good ecosystem. Review collected by and hosted on G2.com.

What do you dislike about Postcoder?

Not clear how to add other members of my team there, it'd be good to allow other members of my organisation to manage it. Could just be something I've missed though Review collected by and hosted on G2.com.

What problems is Postcoder solving and how is that benefiting you?

We needed an address lookup provider. Initially just via postcode, but Postcoder unlocked the ability for us to search via address autocomplete as well which allows us to suggest addresses to the customer. Review collected by and hosted on G2.com.

Response from Rachel Potter of Postcoder

HI Joshua, thank you so much for your review. We're especially pleased to hear that you value our wide range of features and found the setup and documentation so easy to work with! In terms of adding a new user to your account, this is something we are working on to give customers control of, but for the time being if you would like to add new users then please just email into sales@alliescomputing.com with the name and email address of the person you'd like to add and we will be more than happy to set that straight up for you!

Verified User in Consumer Services
UC
Small-Business(50 or fewer emp.)
More Options
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review
What do you like best about Postcoder?

We've been using Postcoder.com for many years and have had a fantastic experience. Originally we just used it for address lookup, the platform has evolved significantly, offering much more than just postcode validation.

The additional features help create a more detailed profile of customers and verify key details, improving data accuracy and customer insights. The service is fast, efficient, and integrates seamlessly into our systems. Their continued innovation and excellent support make them a valuable partner. If you're looking for address verification and customer data enrichment solution, Postcoder.com is a top choice. Highly recommended! Review collected by and hosted on G2.com.

What do you dislike about Postcoder?

It would be great if the pricing on other items was for rounded credit not like 2.4 credits for a mobile look up. other than that its great. Review collected by and hosted on G2.com.

What problems is Postcoder solving and how is that benefiting you?

quick address look up, good an easy integration into our systems Review collected by and hosted on G2.com.

Response from Rachel Potter of Postcoder

Hi, thanks so much for your positive feedback; we're really pleased you're taking advantage of some of our additional features and that you have found our support to be as helpful as we intend it to be. We appreciate the comment regarding the credit pricing; we did consider rounding certain credits to the nearest whole or half credit, but by keeping them rounded to the nearest decimal place it allows us to keep our prices as cost-effective for our customers as possible. We will bear it in mind for future price changes though!

DH
Senior Software Engineer
Insurance
Small-Business(50 or fewer emp.)
More Options
Validated Reviewer
Review source: Seller invite
Incentivized Review
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.

What problems is Postcoder solving and how is that benefiting you?

Postcoder is helping us have a address lookup solution that is easy for customers to use. It has multiple options to search for an address and this allows us to A/B which works best for our UI/UX. Review collected by and hosted on G2.com.

Response from Rachel Potter of Postcoder

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.

MB
Director
Information Technology and Services
Small-Business(50 or fewer emp.)
More Options
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review
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.

What problems is Postcoder solving and how is that benefiting you?

Postcoder allowed me to integrate a postcode/address lookup tool on my client's site Review collected by and hosted on G2.com.

Response from Rachel Potter of Postcoder

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
AA
Small-Business(50 or fewer emp.)
More Options
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review
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.

What problems is Postcoder solving and how is that benefiting you?

When we wanted to add eircode search support to our systems, postcoder had the best API and was more reasonable than other providers in Ireland. Review collected by and hosted on G2.com.

Response from Rachel Potter of Postcoder

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
UR
Mid-Market(51-1000 emp.)
More Options
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review
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.

What problems is Postcoder solving and how is that benefiting you?

Getting Latitude Longitude for customer addresses, so delivery drivers can deliver better Review collected by and hosted on G2.com.

Response from Rachel Potter of Postcoder

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.

RC
MD
Small-Business(50 or fewer emp.)
More Options
Validated Reviewer
Review source: Seller invite
Incentivized Review
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.

What problems is Postcoder solving and how is that benefiting you?

Mistakes when entering delivery details for clients orders. Review collected by and hosted on G2.com.

Response from Rachel Potter of Postcoder

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!

SB
Technical Lead
Renewables & Environment
Small-Business(50 or fewer emp.)
More Options
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review
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.

What problems is Postcoder solving and how is that benefiting you?

Finding addresses for our customers based on postcode.

Locating a user against GIS data map to identify client region (built but not in use due to lack of GIS data files from a number of business partners) Review collected by and hosted on G2.com.

Response from Jasmine Robinson Madden of Postcoder

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.
CP
Technical Director
Small-Business(50 or fewer emp.)
More Options
Validated Reviewer
Verified Current User
Review source: Seller invite
Incentivized Review
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.

What problems is Postcoder solving and how is that benefiting you?

Cleansing data for our customers - see verify-it.co.uk Review collected by and hosted on G2.com.

Response from Jasmine Robinson Madden of Postcoder

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!