App comparison
Add up to 4 apps below to see how they compare. You can also use the "Compare" buttons while browsing.
GetApp offers objective, independent research and verified user reviews. We may earn a referral fee when you visit a vendor through our links.
Our commitment
Independent research methodology
Our researchers use a mix of verified reviews, independent research, and objective methodologies to bring you selection and ranking information you can trust. While we may earn a referral fee when you visit a provider through our links or speak to an advisor, this has no influence on our research or methodology.
Verified user reviews
GetApp maintains a proprietary database of millions of in-depth, verified user reviews across thousands of products in hundreds of software categories. Our data scientists apply advanced modeling techniques to identify key insights about products based on those reviews. We may also share aggregated ratings and select excerpts from those reviews throughout our site.
Our human moderators verify that reviewers are real people and that reviews are authentic. They use leading tech to analyze text quality and to detect plagiarism and generative AI.
How GetApp ensures transparency
GetApp lists all providers across its website—not just those that pay us—so that users can make informed purchase decisions. GetApp is free for users. Software providers pay us for sponsored profiles to receive web traffic and sales opportunities. Sponsored profiles include a link-out icon that takes users to the provider’s website.
Postio
UK address email and phone validation APIs
Table of Contents
Postio - 2026 Pricing, Features, Reviews & Alternatives
All user reviews are verified by in-house moderators and provider data by our software research team. Learn more
Last updated: October 2026
Postio overview
What is Postio?
Postio is a UK address API built for developers who value speed and cost-efficiency. Lookups run on official Royal Mail PAF data — Postio is an official Royal Mail Address Data PAF Solutions Provider — returning postally correct UK addresses for forms, checkouts and back-office tools.
Setup is designed to be easy: a plain REST API with an OpenAPI specification, clear documentation and live published response-time latency. Pricing is flat and transparent — from as little as 1p — with no contracts, no minimums and pay-as-you-go billing; full detail is on the pricing page, postio.co.uk/pricing.
Every new account gets 100 lookups on signup — enough to integrate and test a real form before paying anything.
Postio is operated by Onno Group Limited.
Do you work for Postio? Manage this product listing
Postio’s user interface
Postio reviews
Overall rating
No reviews
- Value for money
- Ease of use
- Features
- Customer support
- Likelihood to recommend0/10
5
4
3
2
1
0
0
0
0
0
Postio's key features
Most critical features, based on insights from Postio users:
All Postio features
Postio alternatives
Postio
Starting from
0.02
One-time payment
Smarty
Starting from
17
Per month
Melissa Data Quality Suite
Starting from
Free
Prospeo
Starting from
49
/user
Per month
Postio pricing
Value for money rating:
Starting from
0.02
One-time payment
Usage Based
User opinions about Postio price and value
Value for money rating:
Postio integrations (5)
Top integrations
Postio support options
Typical customers
Platforms supported
Support options