Europe × Tax & Compliance Software

Tax & Compliance Software in Europe

15 tax & compliance software providers across Europe, publishing 13 APIs.

15 providers 13 published APIs 27 indexed documents

Tax & Compliance Software across Europe — 15 providers on the APIs.io network sit in both cohorts, and between them they publish 13 indexed APIs.

9 of the 15 publish at least one machine-readable API; 6 publish nothing indexed at all. That split is the first thing worth reading here — a vertical can be well represented in a market and still have almost no programmable surface.

By Kin Score band: 4 developing, 4 minimal, 3 thin, 3 emerging, and 1 strong.

Leading by rating: flatin.pt, inFakt, HMRC UK Tax Authority, Vatstack, Aibidia, Hnry, and 9 more.

Region membership is derived from three explicit signals — a provider tag, a provider-name pattern, or a stated headquarters in the provider’s own description. This is a map of stated headquarters, not of markets served.

Providers (15)

Provider Description APIs Rating
flatin.pt Portuguese property-tax APIs providing keyless access to IMI rates for all 308 municipalities and IMT/stamp duty purchase-cost calculations, sourced from official Autoridade Tri... 1 strong
inFakt inFakt is a Polish fintech platform that combines invoicing software, online accounting, and dedicated bookkeeper services for sole proprietors (JDG), limited-liability companie... 1 developing
HMRC UK Tax Authority HM Revenue and Customs (HMRC) provides over 115 APIs through the HMRC Developer Hub for UK tax compliance including Making Tax Digital for VAT and Income Tax, PAYE, customs decl... 1 developing
Vatstack VAT number validation and EU tax rates REST API for validating European business VAT IDs via VIES and accessing current VAT rates for all EU member states. Vatstack provides aut... 1 developing
Aibidia Aibidia is a Helsinki-based transfer pricing technology company whose cloud platform lets multinational enterprises manage transfer pricing policy, intercompany transaction data... 5 developing
Hnry Hnry is a New Zealand-founded financial administration and accounting service for sole traders, contractors and freelancers, operating in New Zealand, Australia and the United K... 1 thin
Sage Accounting Sage Accounting (formerly Sage Business Cloud Accounting and Sage One) is Sage's cloud-based accounting software for UK and international small and medium businesses, covering i... 1 thin
Clear Books Clear Books is UK cloud accounting software with a REST API for managing invoices, expenses, bank transactions, contacts, reports, and tax submissions for small businesses. 1 thin
VAT API EU and UK VAT compliance REST API providing VAT rate retrieval, VAT number validation via the European Commission VIES system and UK HMRC, currency conversion, and VAT-compliant... 1 emerging
Taxfix Taxfix is a Berlin-based fintech that lets individuals and self-employed people in Germany prepare and file their annual income tax return from a mobile app or web browser. User... 0 emerging
Loctax Loctax is a collaborative tax compliance, risk, and governance platform built for global in-house tax teams. Founded in 2020 and based in Gent, Belgium, its Global Tax Intellige... 0 emerging
Taxdoo Taxdoo is a Hamburg-based fintech providing real-time e-commerce accounting software for online retailers and tax advisors. The platform automatically captures sales, fees, paym... 0 minimal
Taxscouts TaxScouts is a UK online tax-return and Self Assessment service that pairs individuals, sole traders, landlords and investors with accredited accountants to prepare, review and ... 0 minimal
ExpressSteuer (fka Express Group) ExpressSteuer (formerly Express Group) is a German tax-technology company, originally a Hamburg-based fintech backed by Insight Partners that offered an app-based, largely autom... 0 minimal
TrustWeaver TrustWeaver was a Stockholm-based provider of on-demand e-invoicing and e-signature compliance services, giving multinational enterprises legally compliant electronic invoicing ... 0 minimal

Indexed API documents (27)

Two numbers, both real: these providers publish 13 APIs as their own documents, which the catalog indexes split one-per-resource into 27 documents.

flatin.pt API

flatin.pt
Keyless REST API for Portuguese IMI rates and IMT/stamp duty calculations, with a remote MCP server exposing four agent tools and an llms...

inFakt API v3

inFakt
inFakt's REST API (v3) for automating invoicing and accounting. Resources are addressed with a .json extension under /api/v3/ and authent...

HMRC Self Assessment API

HMRC UK Tax Authority
The HMRC Self Assessment APIs enable software to submit and manage self assessment tax returns, income sources, and tax calculations for ...

HMRC PAYE (Pay As You Earn) API

HMRC UK Tax Authority
The HMRC PAYE APIs enable payroll software to submit employer payroll data, retrieve tax codes and employee records, and manage PAYE subm...

HMRC Customs Declarations API

HMRC UK Tax Authority
The HMRC Customs Declarations APIs enable customs software to submit import and export declarations, manage authorizations, and integrate...

HMRC Corporation Tax API

HMRC UK Tax Authority
The HMRC Corporation Tax APIs enable accounting software to submit corporation tax returns, retrieve liabilities, manage payments, and ac...

HMRC UK Tax Authority Liabilities API

HMRC UK Tax Authority
VAT financial liabilities

HMRC UK Tax Authority Obligations API

HMRC UK Tax Authority
VAT return filing obligations

HMRC UK Tax Authority Payments API

HMRC UK Tax Authority
VAT payments made to HMRC

HMRC UK Tax Authority Returns API

HMRC UK Tax Authority
VAT return submission

Vatstack Batches API

Vatstack
The Batches API from Vatstack — 2 operation(s) for batches.

Vatstack Evidences API

Vatstack
The Evidences API from Vatstack — 2 operation(s) for evidences.

Vatstack Hits API

Vatstack
The Hits API from Vatstack — 1 operation(s) for hits.

Vatstack Quotes API

Vatstack
The Quotes API from Vatstack — 2 operation(s) for quotes.

Vatstack Rates API

Vatstack
The Rates API from Vatstack — 2 operation(s) for rates.

Vatstack Supplies API

Vatstack
The Supplies API from Vatstack — 2 operation(s) for supplies.

Vatstack Validations API

Vatstack
The Validations API from Vatstack — 2 operation(s) for validations.

Aibidia Aibidia TP AI API

Aibidia
The Aibidia TP AI API API from Aibidia — 1 operation(s) for aibidia tp ai api.

Aibidia Authorize API

Aibidia
The Authorize API from Aibidia — 1 operation(s) for authorize.

Aibidia Create Session API

Aibidia
The Create Session API from Aibidia — 1 operation(s) for create session.

Aibidia Data Injections API

Aibidia
The DataInjections API from Aibidia — 1 operation(s) for datainjections.

Aibidia Extract Types API

Aibidia
The ExtractTypes API from Aibidia — 1 operation(s) for extracttypes.

Aibidia Health API

Aibidia
The Health API from Aibidia — 1 operation(s) for health.

Hnry Platform API

Hnry
The REST API behind the Hnry app. It backs the Hnry iOS/Android clients and the published Hnry Zapier integration, which exposes create/f...

Sage Accounting v3.1 REST API

Sage Accounting
REST API for Sage Business Cloud Accounting providing access to contacts, sales invoices, sales credit notes, purchase invoices, purchase...

Clear Books REST API

Clear Books
RESTful API for integrating with Clear Books accounting software to manage invoices, payments, contacts, bank transactions, and expenses.

VAT API v2

VAT API
REST API for EU and UK VAT compliance including VAT rate lookups by country, VAT number validation against VIES and HMRC, currency conver...

Other industries in Europe

Artificial Intelligence 272 Financial Technology 229 Payments & Money Movement 196 Data & Analytics 175 Climate & Sustainability 152 Banking & Open Banking 151 Education & EdTech 144 Financial Services 140 Government & Public Sector 135 Healthcare 125 Digital Health & Telehealth 122 E-Commerce Platform 118 All of Europe →

Tax & Compliance Software elsewhere

Latin America 10 North America 10 United Kingdom & Ireland 6 DACH (Germany · Austria · Switzerland) 3 Australia & New Zealand 2 India & South Asia 2 Nordics 2 Africa 1 Benelux 1 Central & Eastern Europe 1 France & Iberia 1 Japan & Korea 1 All of Tax & Compliance Software →

This page is the intersection of two independently computed cohorts: Europe and Tax & Compliance Software. A provider appears here only when it is already a member of both. Europe membership is matched on tag, name pattern, stated HQ, so this is a floor rather than a census — coverage gaps show up here as small numbers, not as absent pages.

Work with this as data

Every region here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for regions

6 MCP tools reach this
  • find_regionsBrowse and filter every region in the catalog.
  • get_region_leadersPRO — top-rated providers in this region.
  • cohort_statsPRO — the distribution across the region.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This region 
curl "https://apis.io/api/v1/regions/europe-tax-compliance-software"
All regions 
curl "https://apis.io/api/v1/regions?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/region/europe-tax-compliance-software"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/region/europe-tax-compliance-software/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.