Side by side

OpenCorporates vs Vainu

Both stand on b2b contact data providers. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

OpenCorporates

Free plan APIWeb

OpenCorporates combines a broad company dataset with API, bulk delivery and OpenRefine reconciliation options. Its Essentials plan has a defined call limit, while organizations needing more capacity can review higher tiers or Enterprise pricing.

Visit OpenCorporates

Vainu

Free trial APILinuxMac+2

Vainu combines broad Nordic company coverage with CRM, API, and file-delivery options. Its paid plans target structured prospecting and data workflows, but buyers should account for annual auto-renewal terms and onboarding fees.

Visit Vainu

The facts

	OpenCorporates	Vainu
Free plan	Yes	A free trial
Open source	Not published	Not published
Runs on	API, Web	API, Linux, Mac, Web, Windows
Lowest paid plan	See the plans	Vainu for Prospecting: €3,500 a year
Plans published	4	3
Maker	OpenCorporates	Not published
Website	opencorporates.com	vainu.com
On b2b contact data providers	#42 of 77	#46 of 77

OpenCorporates: what it does well

Records cover more than 200 million companies in 140 jurisdictions.
API returns results in JSON or XML.
Bulk delivery supports selected jurisdictions and delivery frequency.
OpenRefine users can reconcile names with legal entities.
Listed ISO/IEC 27001:2022 and ISO/IEC 27701:2025 certifications.

What to know first

Essentials is £2,250/year.
No free trial is listed.
SOC 2 attestation is not held.
Essentials allows up to 500 API calls monthly.

Vainu: what it does well

Covers over 5 million Nordic companies
Supports Salesforce, HubSpot, Pipedrive, and Dynamics
Offers API, Excel, and CSV delivery
Includes live chat support on all plans
Free trial available

What to know first

No free plan
Subscriptions renew automatically
Cancellation requested 60 days before renewal
Availability varies by country

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