Tax & Compliance Software in Europe
16 tax & compliance software providers across Europe, publishing 29 APIs.
16 providers
29 published APIs
29 indexed documents
Tax & Compliance Software across Europe — 16 providers on the APIs.io network sit in both cohorts, and between them they publish 29 indexed APIs.
10 of the 16 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: 5 developing, 4 minimal, 3 emerging, 2 thin, and 1 strong.
Leading by rating: flatin.pt, inFakt, Co-Legal, Aibidia, Vatstack, HMRC UK Tax Authority, and 10 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 (16)
| 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 |
| Co-Legal | Co-Legal B.V. is a Dutch company (KvK 42135345, Delft) building AI-native legal software and dossier support for Belgian and cross-border Belgium–Netherlands matters — wealth pl... | 2 | developing |
| Aibidia | Aibidia is a Helsinki-based transfer pricing technology company whose cloud platform lets multinational enterprises manage transfer pricing policy, intercompany transaction data... | 6 | 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... | 7 | 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... | 8 | 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 |
| 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 |
| 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 | 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 | minimal |
| 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 |
Indexed API documents (29)
Two numbers, both real: these providers publish 29 APIs as their own documents, which the catalog indexes split one-per-resource into 29 documents.
flatin.pt Public API
flatin.pt
Keyless public endpoints: IMI rates and IMT calculation.
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...
Co-Legal Public Assistant (A2A Agent)
Co-Legal
Agent2Agent 1.0 surface of Co-Legal's public legal/fiscal assistant. The agent card at https://agent.co-legal.be/.well-known/agent-card.j...
Co-Legal Legal Lookup MCP Server
Co-Legal
Remote Model Context Protocol server at https://agent.co-legal.be/mcp (Streamable HTTP, POST only, negotiated protocol version 2025-06-18...
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.
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.
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
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...
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...
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...
Other industries in Europe
Artificial Intelligence 304
Financial Technology 238
Payments & Money Movement 196
Data & Analytics 182
Climate & Sustainability 156
Banking & Open Banking 155
Education & EdTech 145
Financial Services 143
Government & Public Sector 136
Healthcare 130
Digital Health & Telehealth 125
E-Commerce Platform 125
All of Europe →
Tax & Compliance Software elsewhere
North America 13
Latin America 9
United Kingdom & Ireland 6
DACH (Germany · Austria · Switzerland) 3
Australia & New Zealand 2
Benelux 2
India & South Asia 2
Nordics 2
Africa 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.