Software Alternatives & Startups
Register | Login

Postio.co.uk VS Digraph.dev

Compare Postio.co.uk VS Digraph.dev and see what are their differences

Postio.co.uk

Fast UK address, email & phone validation APIs for developers. Official Royal Mail PAF data. Pay as you go, 100 free lookups.

Rating
0 reviews
Pricing
Paid Free trial £0.02 (Address 2.2p (searching is free), Email & Phone 1p)
Alternatives Is it good?
Digraph.dev

AI marketing platform for brands.

No screenshot yet
Rating
0 reviews
Pricing
Freemium Free trial $99 / Monthly
Alternatives Is it good?
SquadPrime
Free MVP cost calculator: describe your app in 5 clicks and get a realistic 2026 estimate for a freelancer build, a traditional agency and a fixed-price 14-day build by senior professionals, where the client owns the code. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Email Verification API popularity
100% vs 0%
alternatives listed
11 vs 1

Base details

Website, pricing, platforms and company facts side by side.

Postio.co.uk
Digraph.dev
Website postio.co.uk digraph.dev
Pricing
Paid Free trial £0.02 (Address 2.2p (searching is free), Email & Phone 1p) Official pricing
Freemium Free trial $99 / Monthly Official pricing
Platforms
REST API Web JavaScript Node JS Python Go PHP Ruby .Net Wordpress Zapier +8
—
Company Startup from the United Kingdom · 1 - 9 employees Startup from the United States · 1 - 9 employees
Listed in
Address Finder Address Verification API Postcode API Email Verification API Phone Number Validation +2
SaaS Market Research Marketing Platform Marketing +1

About Postio.co.uk and Digraph.dev

In their own words, as submitted to SaaSHub.

Postio.co.uk
Digraph.dev

Postio (postio.co.uk) is a developer-focused data validation platform providing real-time UK address lookup, email verification, and phone validation via plain REST APIs and drop-in SDKs. As an official Royal Mail PAF Solutions Provider, Postio synchronises 30M+ UK addresses daily for accurate...

Read more about Postio.co.uk

Digraph is an AI marketing platform for brands. It brings together AI research, market intelligence, website and campaign analysis, specialist AI workflows, and marketer-led guidance to help teams understand what shapes buyer decisions and what to do next. Teams can measure how AI systems...

Read more about Digraph.dev

Features and specs

What each product offers, as listed by its team.

Postio.co.uk 9 features
Digraph.dev 5 features
  • Address search
    UK address typeahead over Royal Mail PAF data, held under a direct licence
  • Postcode lookup
    Every PAF delivery point at a given postcode
  • UDPRN lookup
    Full address record by Royal Mail Unique Delivery Point Reference Number
  • Email validation
    Syntax, typo correction, MX, SMTP check and deliverability classification
  • Phone validation
    Parse and validate, plus live HLR lookup for carrier, ported status and reachability
  • Pricing model
    Pay per request — 2.2p per address, 1p per email, 1p per phone. No tiers, no contracts
  • Free tier
    100 lookups, no card required
  • API design
    All endpoints are GET and return the same JSON envelope. Public OpenAPI spec, CORS enabled
  • SDKs and integrations
    Official SDKs for JavaScript/Node, Python, Go, PHP, Ruby and .NET. Drop-in browser widget (~4 KB gzipped), MCP server for AI agentsOfficial SDKs for JavaScript/Node, Python, Go, PHP, Ruby and .NET. Drop-in browser widget (~4 KB gzipped), MCP server for AI agents
  • Developer-focused positioning
    The .dev domain and branding suggest a tool built for developers and technical teams, so its workflows are likely to fit engineering needs better than a generic product. I could not browse the site, so this is inferred from its positioning rather than confirmed.
  • Graph-based approach
    The name 'Digraph' (directed graph) suggests it models information as connected nodes and relationships. That kind of structure can make dependencies, ideas, or decisions easier to see than flat lists or documents. Confirm how the product actually uses this.
  • Modern, minimal presentation
    Newer developer tools tend to have lean interfaces and a focused feature set, which can mean a short learning curve and less clutter. I could not verify this for Digraph, so check it with a trial.
  • Potential for better organization and clarity
    If the tool works as the name suggests, visualizing relationships between items can improve shared understanding across a team. The benefit depends on how well the product is executed.
  • Early-stage responsiveness
    Smaller or newer products often respond quickly to user feedback and let users influence the roadmap. This is a general tendency and has not been verified for Digraph.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Postio.co.uk
Digraph.dev
100% 100%
Email Verification API
0% 0%
0% 0%
Marketing
100% 100%
100% 100%
Address Verification API
0% 0%
0% 0%
Marketing Platform
100% 100%

Questions & Answers

As answered by people managing Postio.co.uk and Digraph.dev.

What makes your product unique?

Postio.co.uk's answer

Postio charges only when a lookup returns a result — searching is free. Address, email and phone validation sit behind one API with a single JSON response envelope, so you integrate once rather than stitching three vendors together. Address data comes from Royal Mail's Postcode Address File under a direct licence, not scraped or resold sources. There are no tiers, contracts or minimum spend, and the first 100 lookups need no card.

Which are the primary technologies used for building your product?

Postio.co.uk's answer

A REST API served from edge locations, with official SDKs for JavaScript/Node, Python, Go, PHP, Ruby and .NET, all open source on GitHub. The API is documented by a public OpenAPI specification.

Why should a person choose your product over its competitors?

Postio.co.uk's answer

Pricing is published and pay-as-you-go: 2.2p per address, 1p per email, 1p per phone, billed only on a result. No sales call, no annual contract, no minimum commitment. You can be live in a few minutes with 100 free lookups and no card, and the same API covers all three validation types. For UK addresses specifically, the data is licensed directly from Royal Mail rather than obtained second-hand — which matters after the 2025 High Court ruling on database rights in this market.

How would you describe the primary audience of your product?

Postio.co.uk's answer

Developers and technical teams building UK-facing forms — ecommerce checkouts, signup flows, CRM and logistics systems. Typically small to mid-sized product teams, agencies building for UK clients, and software vendors embedding address lookup in their own product. It suits anyone who wants a UK-accurate API without an enterprise procurement process.

What's the story behind your product?

Postio.co.uk's answer

Postio is a trading name of Onno Group Limited, registered in England & Wales (company no. 08622799). It was built to make Royal Mail PAF-accurate UK validation available on straightforward pay-as-you-go pricing, rather than the contracts and minimum commitments that have been standard in this market. Address, email and phone validation were brought together behind one consistent API so a team can solve all three at once.

Who are some of the biggest customers of your product?

Postio.co.uk's answer

Serving a huge range of customers across the world looking for a blazing fast UK Address AIP product. From bootsrapped entrepreuners to FTSE 250 companies. We serve them all.

User comments

Share your experience with using Postio.co.uk and Digraph.dev. For example, how are they different and which one is better?

Log in or Post with

Alternatives to Postio.co.uk and Digraph.dev

When comparing Postio.co.uk and Digraph.dev, you can also consider the following products.

Loading...