Overview

One API brings together VAT-number validation, VAT and GST rates, currency conversion, country data, and VAT-compliant invoicing. It also supports VAT calculation across 179 jurisdictions. This breadth suits integrations that need more than a standalone number check, though the product is an API rather than a finished user-facing application.

Validation checks live records in the UK, EU, Australia, Norway, Switzerland, South Africa, and Brazil. Currency conversions to GBP and EUR use HMRC and European Central Bank rates. Include the requester’s own VAT number and a validation can return an official government consultation number, useful as an audit reference.

Key features

Tax and country data: EU VAT rates and VAT and GST rates from other countries sit alongside country data and VAT calculation. The reach across 179 VAT jurisdictions is useful for internationally oriented workflows; validation itself covers the named live-record jurisdictions.
Developer integration: Official libraries support Python, Node.js, PHP, Go, Ruby, C#/.NET, and Java, with Postman collections linked from the documentation. Teams using these tools have a practical starting point for integration.
Server-side security: Requests require HTTPS and HTTP Basic Auth; the service uses 256-bit SSL. Client-side CORS requests are not supported because exposing account API keys is a security risk. That is a sensible constraint for credential protection, but it rules out direct browser-based calls and requires a server-side layer.
Request throughput: General limits are 300 requests per minute, while UK VAT validation is limited to 3 requests per second. Applications with bursty UK checks need to account for the stricter endpoint limit.

Pricing

VAT Sense has a free plan and paid tiers. All plans include the full API, so the main distinction is monthly request capacity, not access to different features. Prices are exclusive of VAT; payment can be made in GBP, USD, or EUR.

Plan	Monthly allowance	Published billing
Free	100 requests	€0.00/mo
Starter	500 requests	€5.99/mo or €57.50/yr
Basic	2,000 requests	€11.99/mo or €115.10/yr
Standard	10,000 requests	€34.99/mo or €335.90/yr
Plus	25,000 requests	€69.99/mo or €671.90/yr
Premium	50,000 requests	€119.99/mo or €1,151.90/yr

The free tier can support a small integration or low-volume checks, but 100 requests per month is a tight production allowance. Starter is the entry paid step for modest usage; Basic and Standard provide more room for growing workloads, while Plus and Premium target higher-volume integrations. The annual amounts are lower than paying monthly for twelve months, but commit the buyer to annual billing. The broader pricing note gives paid pricing from $6.99/mo; the plan schedule also publishes euro billing amounts.

Platforms

VAT Sense is offered as an API. It fits software teams that can make authenticated server-side requests, not users looking for a native desktop or mobile app.

Who it's for

Choose VAT Sense when a product or internal system needs validation, rates, currency conversion, or invoicing data through one integration, especially when an audit reference or official-rate conversion matters. It is less suitable for nontechnical businesses wanting a standalone filing workflow, or for browser-only implementations that cannot keep credentials server-side.

Pros and cons

Pro: The full API is included on every tier, so upgrading increases quota without changing feature access.
Pro: Live VAT validation across several named regions, broad tax-rate coverage, and official-rate GBP/EUR conversions make the API useful for cross-border workflows.
Pro: The optional government consultation number adds an audit reference when the requester supplies its VAT number.
Con: The free plan’s 100 monthly requests will not stretch far for routine production traffic.
Con: Server-side authentication is mandatory in practice because client-side CORS calls are unsupported; teams without a backend face an architectural obstacle.
Con: UK validation has a lower per-second limit than the general API limit, which can constrain bursts.

Alternatives

VAT Software is a useful directory starting point for comparing products across the category.

LOVAT is worth considering if you want a broader Android, iOS, web, and API presence, a free option, and a free trial; its listed free plan includes one data-import integration.
VAT Direct may suit UK businesses seeking free bridging for VAT and Income Tax Self Assessment, with digital records for businesses below the VAT threshold up to 500 transactions per period.
VATlayer is another API option with a free tier, but that tier is limited to 100 monthly requests, non-commercial use, and limited functionality.
Vatstack is an API and web alternative whose free Developer plan focuses on unlimited quotes and dummy validations and supplies.
Kintsugi is an API alternative with a free tier centered on nexus monitoring, exposure and historical-liability audits, and risk assessment.
BTCHub is a paid desktop and web option for buyers who need MTD VAT filing to HMRC, group and consolidated VAT, and spreadsheet or bookkeeping imports.
VAT MTD is an iOS and macOS alternative with a free trial and single-VAT-number plans billed monthly or quarterly.
hellotax is an API alternative with seller-oriented plans, including a New Seller tier with 500 transactions yearly and one integration.

Verdict

VAT Sense is a strong fit for developers who want validation, tax rates, conversions, and invoicing data through one server-side API. Its broad functions and consistent feature access across plans are compelling; look elsewhere if you need browser-only access, a turnkey filing product, or materially more than 100 requests a month without moving to a paid tier.

	Taxually	VAT Sense
Free plan	No	Yes
Free trial	No	No
Paid from	€12.50/mo	Free
Open source	No	No
Platforms	api, Web	api
Free plan	—	Yes
Paid from	—	6.99 /mo
VAT calculation	—	Yes
VAT jurisdictions	—	179 countries
E-invoicing support	—	basic

Taxually vs VAT Sense

Taxually

VAT Sense