Katalis API alternatives

UK company checks: payment practices, contracts won, registers, filed accounts, change feed. If it doesn't fit your project, here are the 10 best free Business APIs to use instead in 2026, out of 43 in the directory.

For reference, Katalis API: HTTPS.

1. 1

   Legal Sandbox Georgia API

   Online · 563 ms

   Find verified legal specialists in Georgia from natural-language queries.

   • No API key needed
   • Returns JSON at its URL
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
2. 2

   Verif Entreprise FR API

   Online · 699 ms

   French company checks by SIREN: status, insolvency (BODACC), VAT (VIES); free preview.

   • No API key needed
   • Returns JSON at its URL
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
3. 3

   KontragentPro API

   Online · 719 ms

   Russian company data from state registers by INN or OGRN: profile, finances, timeline.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
4. 4T

   TradeDataHub API

   Online · 1008 ms

   U.S. contractor datasets with a free discovery API for coverage, pricing and masked previews.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
5. 5

   Tomba email finder API

   Online · 532 ms

   Email Finder for B2B sales and email marketing and email verifier.

   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
6. 6I

   InvoiceIn API

   Online · 988 ms

   Parse and validate received e-invoices: XRechnung, ZUGFeRD, Peppol, FatturaPA, KSeF.

   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
7. 7

   UGC VZ API

   Online · 602 ms

   Directory of DACH user-generated-content creators with topics, cities, rates and contact requests.

   • No API key needed
   • HTTPS

   No authHTTPSNo CORS
8. 8

   EuroValidate API

   Online · 1433 ms

   EU VAT (VIES), IBAN and EORI validation with company name & address lookup.

   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
9. 9

   GlobalEntity API

   Online · 1254 ms

   Official company data from 56 European business registers as normalized JSON.

   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
10. 10

    Meirra API

    Online · 1634 ms

    SEO monitoring, email verification, lead generation, and marketing analytics.

    • Callable from the browser (CORS)
    • HTTPS

    apiKeyHTTPSCORS

Katalis API vs alternatives

Katalis API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
Katalis	Required	Yes	No	Up	777 ms	Not rated
Legal Sandbox Georgia	No	Yes	Yes	Up	563 ms	Not rated
Verif Entreprise FR	No	Yes	Yes	Up	699 ms	Not rated
KontragentPro	No	Yes	Yes	Up	719 ms	Not rated
TTradeDataHub	No	Yes	Yes	Up	1008 ms	Not rated
Tomba email finder	Required	Yes	Yes	Up	532 ms	Not rated
IInvoiceIn	Required	Yes	Yes	Up	988 ms	Not rated
UGC VZ	No	Yes	No	Up	602 ms	Not rated
EuroValidate	Required	Yes	Yes	Up	1433 ms	Not rated

See also: best Business APIs · all Business APIs