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VATComply Alternative — TaxID
VATComply is a free, open-source EU VAT validation API — a thin wrapper over the EU's VIES system that needs no API key and no sign-up. That makes it the fastest thing in the world to drop into a prototype: one GET request, no auth. The honest question is what happens when the prototype becomes production. VATComply is a best-effort community service with no SLA, no support, no caching layer, and a ~2 request/second per-IP limit — every call hits VIES live, so it inherits VIES's downtime and latency directly. TaxID is the commercial counterpart: keyed, cached with sub-10ms responses, and covering GB, AU, NO and CH on top of the 27 EU states. Here's the honest trade-off.
Disclosure: TaxID is our product. Competitor data is sourced from public pricing pages and documentation, accurate as of May 2026. We link to source pages where possible. Pricing may have changed — always verify on the vendor's site.
Feature comparison
| Feature | TaxID | VATComply |
|---|---|---|
| EU countries supported | — | 27 |
| VIES-backed validation | ||
| Response caching | Redis 24h | None |
| Free tier requests/mo | 100 | 2 req/sec |
| Max paid requests/mo | 1,000,000 | Free only |
| Batch validation | — | — |
| Webhook notifications | — | — |
| SLA guarantee | — | — |
| Company name in response | ||
| Cached response time | 10ms | VIES-live |
| Starting price | $0/mo (Free) | Free ↗ |
Why developers switch from VATComply
VATComply limitations
- No SLA, no support, no uptime guarantee — best-effort community service
- ~2 requests/second per-IP limit, with no way to raise it
- No caching layer — every call hits VIES live, inheriting its downtime and latency
- EU/VIES only — no GB, AU, NO or CH coverage
- No batch endpoint, webhooks, per-account analytics or commercial accountability
TaxID advantages
- 24h Redis caching with sub-10ms cached responses — VATComply calls VIES live on every request
- Commercial reliability: per-account API keys, usage analytics and support vs a best-effort community service
- Higher throughput — no hard ~2 request/second per-IP cap
- Coverage beyond the EU: GB (HMRC), Australia (ABR), Norway (Brønnøysund) and Switzerland (BFS)
- Explicit service_unavailable status when VIES is down, instead of a raw upstream failure
When to choose VATComply instead
VATComply is genuinely the right call in three cases. If your budget is zero and your volume is low — a hobby project, an internal script, a one-off backfill — a free, no-key endpoint is unbeatable. If you would rather self-host or audit the code than depend on any SaaS, VATComply is open source (github.com/madisvain/vatcomply) and you can fork it. And if you are just prototyping and don't yet need reliability, support, or non-EU coverage, there is no reason to pay. You only outgrow it when you need uptime guarantees, higher throughput, a caching layer, GB/AU/NO/CH coverage, or someone to call when it breaks.
Switching from VATComply to TaxID
The core change is the endpoint URL and authentication header. Both APIs return company_name, valid, and company address — no downstream code changes needed for the core validation logic.
GET https://api.vatcomply.com/vat?vat_number=DE123456789 (no authentication)
GET https://www.taxid.dev/api/v1/validate/DE/DE123456789 (Header: Authorization: Bearer)
VATComply needs no key and takes the VAT number as a query parameter, returning a top-level name field. TaxID uses a Bearer token and RESTful path parameters — move the country code into the URL path — and returns company_name. Both return the registered address and a valid boolean.
Start with TaxID free
100 validations/month free. No credit card. API key in two minutes.
Frequently asked questions
Is VATComply really free?
Yes — VATComply is completely free and needs no API key or account. It is an open-source (github.com/madisvain/vatcomply) wrapper over the EU VIES system, rate-limited to roughly 2 requests per second per IP. There are no paid tiers. The trade-off is that it is a best-effort community service with no SLA, no support and no uptime guarantee, so it suits prototypes and internal tools better than a production checkout flow.
What does TaxID add over a free VIES wrapper like VATComply?
Reliability, performance and coverage. TaxID caches validated results for 24 hours in Redis, so cached lookups return in under 10ms instead of waiting on VIES every time; it is a keyed commercial service with usage analytics and support; and it validates GB (HMRC), Australia (ABR), Norway and Switzerland in addition to the 27 EU states. VATComply is EU/VIES only and calls VIES live on every request.
How do I migrate from VATComply to TaxID?
Change the endpoint from api.vatcomply.com/vat?vat_number=DE123456789 to taxid.dev/api/v1/validate/DE/DE123456789, add an Authorization: Bearer YOUR_KEY header, and move the country code into the URL path. Map the response: VATComply's top-level name becomes TaxID's company_name; both return the registered address and a valid boolean.
Can I self-host VATComply?
Yes — VATComply is open source, so you can run your own instance rather than depend on the public endpoint. That is a real advantage if you want full control. If you would rather not operate infrastructure and want caching, an SLA path, analytics and non-EU coverage out of the box, a managed API like TaxID handles that for you.