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KontragentPro API vs TradeDataHub API

Two free Business APIs compared on access, reliability and developer ratings, using data from our daily health checks.

The verdict

  • Choose KontragentPro API if its data fits your use case better; on access and reliability it's level with TradeDataHub API.
  • Choose TradeDataHub API if its data fits your use case better; on access and reliability it's level with KontragentPro API.

Side by side

KontragentPro APITradeDataHub API
What it doesRussian company data from state registers by INN or OGRN: profile, finances, timeline.U.S. contractor datasets with a free discovery API for coverage, pricing and masked previews.
ProviderKontragentPro API v2TradeDataHub
API keyNot neededNot needed
HTTPSYesYes
CORS (browser calls)YesYes
Status todayOnline · 719 msOnline · 1008 ms
Uptime (30 days)UpUp
Developer ratingNot rated yetNot rated yet
PriceFree / free tierFree / free tier
KontragentPro docs ↗TradeDataHub docs ↗

About each API

KontragentPro logoKontragentPro API

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

Strengths

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

Ratings, reviews and FAQ →

TradeDataHub API

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

35,113-record contractor database with 34,238 phone numbers (97.5%) and 30,373 websites (86.5%) across 10 live states. Preview exact counts free, then download CSV datasets from $9.99. Latest source verification: 2026-09-13.

Strengths

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

Ratings, reviews and FAQ →

How to choose between them

  • Prototyping or a tutorial? Pick the one that needs no API key (both qualify).
  • Calling from a web page? You need CORS. Otherwise route requests through your own server or a serverless function.
  • Going to production? Favour HTTPS, a strong uptime record and a provider with clear rate limits and terms. Check each API's docs before you commit.
  • Still unsure? Both are free to try: send one request to each and compare the data you get back.

KontragentPro vs TradeDataHub FAQ

Do KontragentPro API and TradeDataHub API need an API key?

Neither needs an API key; you can call both straight away.

More comparisons

KontragentPro API alternatives · TradeDataHub API alternatives · best Business APIs