Comparison
Overheid.io alternative
Overheid.io (OpenKvK) is the best-known self-service API for KVK data and sits close to Companize on price. The difference is what you get for that money: more requests at every price point, a free plan on the real dataset and enrichment on top of the register.
Pricing side by side
Overheid.io offers three subscriptions. Small costs €15 per month and includes 2,500 API calls, 1,000 suggestions and 1,000 geo lookups; Medium costs €40 and includes 25,000 of each; Large costs €130 and includes 100,000 of each. The maximum page size grows from 10 to 50 and data export is only included in Large.
Companize sits at comparable price points (€15, €45 and €135 per month) and includes more at every level. Starter comes with 5,000 autocomplete requests, 2,500 profiles and 200 enrichment credits; Growth with 30,000 autocomplete requests, 25,000 profiles and 1,500 credits; Pro with 120,000 autocomplete requests, 100,000 profiles and 6,000 credits. There is also a free plan with 1,000 autocomplete requests and 250 profiles per month.
Test for free on real data
With Overheid.io you develop against a limited test set of around 10,000 documents and only see the real behaviour after taking out a subscription. With Companize you build against the complete dataset of every Dutch company from day one: the free plan asks for no payment details and gives you 1,000 autocomplete requests and 250 profile lookups per month.
Enrichment on top of the register
OpenKvK serves register data: name, address, KVK number, SBI codes and legal form. Companize serves that same base plus enrichment in the same API: website, email addresses, phone numbers, social profiles, logo, employee count, revenue and total assets, officers and owners, registry publications and VAT validation through VIES.
Enrichment is metered in credits, separate from autocomplete and profiles. That keeps autocomplete cheap and generous, and you only pay for enrichment when you use it.
Fresh and fast
Freshness is where register APIs most often fall short: an address that changed months ago still ends up in your form and your CRM. Companize refreshes the data daily, so registrations and addresses stay current.
Speed is another place you will notice the difference. A purpose-built search index returns typo-tolerant suggestions in milliseconds, with low latency, where many register APIs take noticeably longer per request. Autocomplete feels instant, also in onboarding and checkout flows.
Frequently asked questions
- Is Companize more expensive than Overheid.io?
- No, the price points sit side by side: €15, €45 and €135 per month at Companize versus €15, €40 and €130 at Overheid.io. For that money Companize gives you more requests, a larger page size and enrichment credits.
- Can I try Companize for free?
- Yes. The free plan runs on the complete dataset and gives you 1,000 autocomplete requests and 250 profile lookups per month, with no payment details.
- Does Overheid.io offer enriched data too?
- No. Overheid.io only serves register data from the Handelsregister: name, address, KVK number, SBI codes and legal form. Website, contact details, social profiles, employee count and key financials are not available there. At Companize they are part of the same profile.
- How do I switch from Overheid.io to Companize?
- Create a free account, create an API key and replace your Overheid.io calls with Companize's autocomplete and profile endpoints. Both return JSON over REST; most teams switch within an afternoon.
Start building on Companize today
Create a free account, grab an API key and make your first call in minutes. Upgrade only when you need more volume.
Free plan included. No credit card required.