How is Prometiam different from OpenCorporates?

Scope: Prometiam covers Spain, France, and the United Kingdom in depth, with daily-fresh updates and structured corporate-event timelines, plus Norway (Brønnøysundregistrene) with companies and directors, and Ireland (CRO) and Poland (KRS) at company level. OpenCorporates covers 140+ jurisdictions but with variable freshness and depth — some sources updated yearly or quarterly. Prometiam also includes sanctions screening; OpenCorporates does not.

Is Prometiam open data?

No — Prometiam is a paid API. The underlying source (BORME, BODACC, Companies House, Brønnøysundregistrene, CRO, KRS) is open data, but Prometiam adds parsing, normalisation, daily updates, sanctions enrichment, and a documented REST API with published pricing.

Can I use OpenCorporates free for my workflow?

OpenCorporates is free for non-commercial use with limited rate caps. Commercial bulk access requires a paid licence. Prometiam’s free tier is a 14-day trial for commercial use, up to 1,000 calls/month, no card — subscribing keeps the same key working.

Does OpenCorporates have sanctions screening?

No. OpenCorporates focuses on company-registry data only. Sanctions screening requires a separate tool. Prometiam includes EU + UN + OFAC + UK OFSI + FR gels, plus the US Consolidated Screening List, on Professional.

Prometiam: daily across ES, FR, GB. OpenCorporates: varies — some jurisdictions daily, many quarterly or annual. Check the jurisdiction’s freshness page on OpenCorporates before relying on it for KYB.

OpenCorporates Alternative

An EU + UK-focused alternative to OpenCorporates with daily-fresh registry data, official-source attribution, and sanctions screening included on the Professional tier. This comparison is honest about where each tool wins.

TL;DR

OpenCorporates is a respected open-data project spanning 140+ jurisdictions — excellent for research, journalism, and exploring corporate networks worldwide. If your scope is EU + UK and you need daily-fresh data, predictable production access, sanctions screening, and structured corporate-event timelines, Prometiam fits an API workflow more cleanly. If you need broad global jurisdiction coverage, OpenCorporates wins.

Why teams compare them

OpenCorporates freshness varies by jurisdiction — some daily, many quarterly or annual.
OpenCorporates has no sanctions screening; KYB workflows need a separate tool.
Its free tier is non-commercial; production/bulk access needs a paid licence.
Corporate-event types are less normalised across its jurisdictions.

What Prometiam covers

A REST API over official EU + UK registry data — Spain (BORME), France (BODACC), United Kingdom (Companies House), Norway (Brønnøysundregistrene, companies and directors) — daily-fresh, with normalised corporate events, director-network lookup, and sanctions plus US export-control screening across six sources (EU, UN, OFAC, UK OFSI, French gels, and the US Consolidated Screening List / BIS Entity List, Denied Persons, ITAR) covering 44,000+ active entities. Ireland (CRO) and Poland (KRS) are company-level only. UK beneficial ownership is PSC-based. Public pricing from EUR 9.99/month, monthly or annual (ten months' price for twelve), with a 14-day free trial (1,000 calls/month, no card — not an ongoing plan) and EU data residency.

Built for the API-native workflow

Every registry identifier is one parameter — SIREN/SIRET (France), NIF/CIF (Spain), company number (UK), CRO number (Ireland), KRS number (Poland), organisasjonsnummer (Norway) — and ?name= is a normalised partial match a type-ahead field can call on every keystroke, across one schema for all six 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. Free SIREN, NIF, Companies House number, KRS, CRO number and organisasjonsnummer lookup tools run the same call without a key.

Beyond the registry record

Two derived signals on the Prometiam side, neither of them a rating: registry_compliance, which marks companies still on the register that stopped meeting their filing duties (Spain, the United Kingdom, Ireland and Norway), and public procurement — contract awards from Spain, France, the UK, Ireland, Poland and Norway by supplier, buyer, identifier, CPV code and date, plus a beta score for the contracting body itself in Spain and France. Both are dated facts with their source, on the published price and in the free tier; a score is a prompt to look, never a finding of wrongdoing. Public-buyer risk · Procurement screening

At a glance

	Prometiam	OpenCorporates
Coverage	ES + FR + GB + IE + PL + NO live	140+ jurisdictions (uneven depth)
Freshness	Daily across covered countries	Daily for some, quarterly/annual for others
Pricing	Public — €0 / €9.99 / €29.99 / €99.99 / Custom	Public — Essentials £225/mo (500 calls), Starter £660/mo (2,500), Basic £1,200/mo (5,000), Enterprise on quote
Free tier	14-day trial — 1,000 API calls/month, no card	No commercial free tier — free at-scale access is for journalists, NGOs and academics
Sanctions screening	Included on Pro	Not available
Director network	Cross-company lookup	Officer search
Corporate-event timeline	Normalised endpoint	Filings; less structured
SLA	SLA on paid tiers	Best-effort
EU data residency	Default (Frankfurt)	UK-hosted

Frequently asked questions

How is Prometiam different from OpenCorporates?: Scope: Prometiam covers Spain, France, and the United Kingdom in depth, with daily-fresh updates and structured corporate-event timelines, plus Norway (Brønnøysundregistrene) with companies and directors, and Ireland (CRO) and Poland (KRS) at company level. OpenCorporates covers 140+ jurisdictions but with variable freshness and depth — some sources updated yearly or quarterly. Prometiam also includes sanctions screening; OpenCorporates does not.
Is Prometiam open data?: No — Prometiam is a paid API. The underlying source (BORME, BODACC, Companies House, Brønnøysundregistrene, CRO, KRS) is open data, but Prometiam adds parsing, normalisation, daily updates, sanctions enrichment, and a documented REST API with published pricing.
Can I use OpenCorporates free for my workflow?: OpenCorporates is free for non-commercial use with limited rate caps. Commercial bulk access requires a paid licence. Prometiam’s free tier is a 14-day trial for commercial use, up to 1,000 calls/month, no card — subscribing keeps the same key working.
Does OpenCorporates have sanctions screening?: No. OpenCorporates focuses on company-registry data only. Sanctions screening requires a separate tool. Prometiam includes EU + UN + OFAC + UK OFSI + FR gels, plus the US Consolidated Screening List, on Professional.
How fresh is each?: Prometiam: daily across ES, FR, GB. OpenCorporates: varies — some jurisdictions daily, many quarterly or annual. Check the jurisdiction’s freshness page on OpenCorporates before relying on it for KYB.