Software Alternatives & Startups

Protocol Deviation VS The VAT API

Compare Protocol Deviation VS The VAT API and see what are their differences

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Protocol Deviation logo Protocol Deviation

eClinical platform for clinical trials

The VAT API logo The VAT API

Instant EU VAT number validation for seamless compliance and automation.
  • Protocol Deviation Landing page
    Landing page //
    2022-11-18
  • The VAT API
    Image date //
    2025-06-27

The VAT API is a fast and reliable solution for validating EU VAT numbers via a simple, developer-friendly API. Designed for businesses, SaaS platforms, and eCommerce sites operating across Europe, it automates VAT ID verification in real time—helping you stay compliant, reduce fraud, and streamline onboarding or invoicing processes. With a focus on speed, uptime, and simplicity, The VAT API eliminates the need to manually check VAT numbers via the VIES portal. Just plug in the API and start validating VAT numbers automatically from anywhere in your system.

Key Features: - Real-time EU VAT number validation via API - Supports all EU member states via VIES - JSON responses with clear status, name, and country info - Easy integration with PHP, Python, Zapier, and more - Lightning-fast response times and high reliability - Free tier available for testing and low-volume use

Best for: SaaS companies, invoicing tools, marketplaces, B2B platforms, eCommerce systems.

Use Cases: - Automate VAT checks during user sign-up - Validate customers before issuing reverse-charge invoices - Prevent fraudulent or incorrect VAT numbers

Pricing: Free tier available. Simple and affordable paid plans scale with your usage.

Compliance: Based on official EU VIES data, always up to date.

The VAT API

$ Details
freemium $7.99 / Monthly
Release Date
2025 March
Startup details
Country
United Kingdom
State
England
City
London
Founder(s)
Uwe Dreissigacker
Employees
1 - 9

Protocol Deviation features and specs

No features have been listed yet.

The VAT API features and specs

  • Real-time EU VAT
    Real-time EU VAT number validation via API
  • EU member states
    Supports all EU member states via VIES
  • JSON responses
    JSON responses with clear status, name, and country info

Analysis of Protocol Deviation

Overall verdict

  • Protocol Deviation appears to be a niche resource focused on clinical trial and research compliance topics, which can be valuable for those in the industry, though independent verification of its authority, accuracy, and update frequency is recommended before relying on it for critical decisions.

Why this product is good

  • Focuses on a specialized topic (protocol deviations in clinical research) that is often underserved by general resources
  • May offer practical guidance for handling deviations, documentation, and regulatory compliance
  • Can serve as a convenient reference point for clinical research professionals seeking quick information

Recommended for

  • Clinical research coordinators and associates managing trial compliance
  • Regulatory affairs and quality assurance professionals in life sciences
  • Sponsors, CROs, and site staff needing guidance on documenting and reporting protocol deviations
  • Students or newcomers learning about Good Clinical Practice (GCP) and trial management

Analysis of The VAT API

Overall verdict

  • The VAT API (thevatapi.com) is a solid, developer-friendly service for validating VAT numbers and handling EU VAT rate lookups, offering reliable data and straightforward integration that makes it a good choice for businesses needing tax compliance automation.

Why this product is good

  • Provides accurate, up-to-date EU VAT rates and reliable VAT number validation via VIES
  • Simple RESTful API with clear documentation that is easy to integrate into existing systems
  • Helps automate tax compliance, reducing manual errors in cross-border transactions
  • Offers price calculation features including VAT-inclusive and VAT-exclusive amounts
  • Typically supports fast response times and reasonable pricing tiers for various business sizes

Recommended for

  • E-commerce businesses selling across EU member states
  • SaaS companies needing automated VAT compliance and invoicing
  • Developers building billing or checkout systems requiring VAT validation
  • Accounting and fintech platforms handling tax calculations
  • Small to medium enterprises seeking to streamline cross-border tax reporting

Protocol Deviation videos

Protocol Deviations

More videos:

  • Review - What Is A Protocol Deviation?
  • Review - The Differences Between Protocol Deviations and Violations In Clinical Research Both Minor and Major

The VAT API videos

No The VAT API videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to Protocol Deviation and The VAT API)
Clinical Trial Management System
Tax Compliance
0 0%
100% 100
Healthcare
100 100%
0% 0
APIs
0 0%
100% 100

Questions & Answers

As answered by people managing Protocol Deviation and The VAT API.

Which are the primary technologies used for building your product?

The VAT API's answer:

Built on AWS (Amazon EC2/API Gateway), with Postman collection for docs, JSON/REST API architecture pulling VAT data from VIES and HMRC endpoints

Who are some of the biggest customers of your product?

The VAT API's answer:

businesses all over the world

How would you describe the primary audience of your product?

The VAT API's answer:

Digital businesses, SaaS and e-commerce platforms needing accurate, real-time VAT rate lookup, VAT number validation, and compliant invoice generation across EU & UK.

What's the story behind your product?

The VAT API's answer:

Launched in late 2014 for new EU VAT rules (TBE services). Version 2 released in April 2019 with rewritten core, better docs, infrastructure, pricing, and future-proofing (Brexit, EU changes)

What makes your product unique?

The VAT API's answer:

A UK-based, Amazon‑hosted service with real-time VAT rates, cross-border validation (EU/UK), compliant invoicing features, IP-based geolocation, currency conversion, audit-ready logs, and developer-friendly docs.

Why should a person choose your product over its competitors?

The VAT API's answer:

Offers mature, stable service since 2015, scalable AWS infrastructure, direct integration with official EU Commission and HMRC tools, and built-in VAT-compliant invoicing.

User comments

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What are some alternatives?

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