An honest comparison for teams weighing Companyweb against Prometiam for Belgian company data by API. Companyweb is a Belgian business-information platform whose site describes company information (a health barometer, a credit limit, financial statements, key figures and payment behaviour), monitoring alerts, prospecting, international search and compliance reports, with standard integrations for CRM, ERP and accounting software and a documented API that is available by contacting Companyweb. Prometiam is the register-record API: an enterprise number, a Belgian VAT number or a name in, the KBO/BCE record out. All Companyweb facts on this page were read on its own site (companyweb.be) on 2026-09-30.
Breadth of data. Its site lists, for Belgian companies, annual accounts and key figures, a health barometer, a credit limit, payment behaviour, the people who control a company and their other mandates, a timeline of events and official publications updated daily, where the Belgian record on Prometiam is the register record only. It states that it processes data from the National Bank of Belgium, the Belgian Official Gazette and the Crossroads Bank for Enterprises daily. Product surface: alerts on a monitored customer base, prospecting lists, KYC reports with PEP and sanction checks, international reports, mobile apps and an integration team, for people as well as for code.
A price you can see and an API key you can start on. Prometiam publishes every tier from a 14-day trial (1,000 API calls per month, no credit card) through Starter at €9.99 a month to Scale at €99.99, monthly or annual, each with its call allowance and rate limit. Companyweb's order page lists subscriptions billed annually with optional add-ons, its integrations page asks you to contact Companyweb for API access, and we did not find an API price on its public pages. The official record, validated: the enterprise number's mod-97 check digits and the BE VAT alias, in the same response shape as Spain, France, the UK, Ireland, Poland, Norway, Finland, Sweden and Croatia.
Company records from the Crossroads Bank for Enterprises (KBO/BCE): legal name, legal form, status, registered address, activity code and dates; no officers, no corporate-event stream, no monitoring, no registry-compliance signal and no insolvency notices, and enterprises of natural persons (eenmanszaak / entreprise individuelle) are never served.
If your workflow is a lookup, resolving a customer's identifier or a few typed letters into a company record for an onboarding form, an invoice or a CRM row: every registry identifier is one parameter — NIF/CIF (Spain), SIREN/SIRET (France), company number (UK), CRO number (Ireland), KRS number (Poland), organisasjonsnummer (Norway), Y-tunnus (Finland), organisationsnummer (Sweden), MBS or OIB (Croatia), enterprise number (Belgium) — and ?name= is a normalised partial match a type-ahead field can call on every keystroke, across one schema for all live countries. Auth is one bearer key; rate limits scale 10 to 600 requests/minute by tier. A TypeScript SDK (prometiam-risk-api on npm) and an MCP server (prometiam-risk-mcp, also at /mcp) are both published; no Python SDK yet. Pricing is monthly or annual (ten months' price for twelve). Free — 14-day trial. 1,000 API calls per month, 10 requests/minute, no credit card. Subscribing keeps the same key working. The free plan is not an ongoing one. Free identifier lookup tools, including an enterprise number lookup, run the same call without a key.
| Prometiam | Companyweb (read 2026-09-30) | |
|---|---|---|
| What it is | A register-record API: lookup, validation, one schema across the live registries | A Belgian business-information platform with company information, monitoring, prospecting, international search and compliance reports, a web app, mobile apps and an API |
| Belgium | Company records from the Crossroads Bank for Enterprises (KBO/BCE): legal name, legal form, status, registered address, activity code and dates; no officers, no corporate-event stream, no monitoring, no registry-compliance signal and no insolvency notices, and enterprises of natural persons (eenmanszaak / entreprise individuelle) are never served. | Company information built on data it says it processes daily from the National Bank of Belgium, the Belgian Official Gazette and the Crossroads Bank for Enterprises, with a health barometer, a credit limit, annual accounts, payment behaviour and controlling persons (its product and order pages) |
| Other markets | Every live country under one schema; corporate insolvency across nine markets | International reports and, as an extension, alerts for France and the Netherlands (its monitoring and order pages) |
| Financials, credit, ownership | Not for Belgium | Yes, per its product and order pages |
| API | REST, bearer key at signup, TypeScript SDK, MCP server | A documented API with guidelines and test cases; access by contacting Companyweb (its integrations page) |
| Free access | 14-day trial: 1,000 API calls per month, no credit card, key at signup | A free trial without payment details; no free API tier is described on the pages read |
| Pricing | Public — 14-day trial, then €9.99 to €99.99, plus custom, monthly or annual | Annual subscriptions with optional add-ons, priced excluding taxes; no API price on the pages read |
| Commitment | None; monthly or annual | Subscriptions billed annually, per its order page |