Comparison · OpenCorporates

OpenCorporates Alternative

An multi-country-focused alternative to OpenCorporates with daily-fresh data, official-source attribution, and sanctions screening (beta) included on Professional. 14-day free trial, public pricing.

TL;DR

OpenCorporates is a brilliant open-data project covering 140+ jurisdictions — invaluable for research, journalism, and exploring corporate networks across many countries. If your scope is the 36 countries Prometiam covers and you need daily-fresh data with predictable production-grade access, sanctions screening, and structured corporate-event timelines, Prometiam fits the API workflow more cleanly. If you need the breadth of jurisdictions OpenCorporates offers, that’s where it wins.

Why teams compare them

1. Freshness varies by jurisdiction. OpenCorporates’ wide coverage is uneven — some jurisdictions are daily, many are quarterly or annual. Check the source page before relying on it for KYB.
2. No sanctions screening. OpenCorporates focuses on registry data. KYB workflows that need sanctions need a separate tool.
3. Commercial licensing. Free tier is non-commercial. Bulk and production access requires a paid licence.
4. Corporate-event timeline. OpenCorporates exposes filings; structured event types are less normalised across jurisdictions.

Prometiam in one paragraph

REST API over official multi-country company-registry data — Spain (BORME), France (BODACC), United Kingdom (Companies House) — daily-fresh, with normalised corporate events, director-network expansion, and sanctions and US export-control screening (beta; EU + UN + OFAC + UK + Australia (DFAT) + FR gels, plus the US Consolidated Screening List), plus Norway (Brønnøysundregistrene) with companies and directors, and Ireland (CRO), Poland (KRS), Finland (PRH/YTJ), Sweden (Bolagsverket), Belgium (KBO/BCE), Denmark (CVR), Estonia (e-Business Register), Slovakia (RPO), Switzerland (Zefix), Latvia (Register of Enterprises), Cyprus (DRCOR), Romania (ONRC), Croatia (Sudski registar) and the United States at company level. €9.99/month entry, 14-day free trial, EU data residency.

At a glance

Built for the API-native workflow

The comparison above is about registries. This is about the call a developer actually writes: 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 identifier, one parameter. SIREN or SIRET, NIF/CIF, the Companies House number, the CRO number, the KRS number, the organisasjonsnummer and each other registry's own number all go in the same parameter — ?country= picks the register, the parameter doesn't change.
• Name search built for a form field. ?name= is a normalised, partial match — call it on every keystroke and wire it into a type-ahead field.
• One schema, every registry. The same response shape for every ?country= value.
• Auth and rate limits. A single bearer key (Authorization: Bearer rk_live_...); limits scale 10 to 600 requests/minute by tier.
• A typed client, if you want one. prometiam-risk-api on npm — TypeScript types, retries on 429/5xx, cursor pagination, typed errors. The same client for Python: prometiam-risk-api on PyPI.
• From an agent, not just a form. The MCP server (prometiam-risk-mcp on npm) puts the same lookups in Claude Desktop, Cursor or any MCP client.
• Try an identifier before signing up. Free SIREN, NIF, Companies House number, KRS, CRO number and organisasjonsnummer lookup tools run the same call with a shared key.

Who should pick OpenCorporates

• You need company data across many jurisdictions (Asia, Africa, LATAM, US states) where Prometiam doesn’t cover
• Your use case is research, journalism, or one-off exploration — not production KYB
• You’re comfortable handling jurisdiction-by-jurisdiction freshness differences
• You don’t need sanctions screening included in the same API

The price comparison, from both published pages

Both companies publish their prices, so this is checkable rather than asserted. OpenCorporates lists Essentials at £225/month for 500 API calls (£2,250/year), Starter at £660/month for 2,500, and Basic at £1,200/month for 5,000 (opencorporates.com/pricing, re-verified 27 September 2026, unchanged since 25 July 2026). Prometiam Starter is €9.99/month for 1,000 credits(or EUR 99.90/year, ten months' price for twelve), and Starter begins with a 14-day trial — 500 credits, nothing charged for 14 days (a card is required), not an ongoing plan.

At the entry tier that is 500 API calls a month versus 1,000 credits (a company record costs 1) — a difference in allowance of about 2×, before any exchange-rate argument. There is also no commercial free tier on the OpenCorporates side: free at-scale access is reserved for journalists, NGOs and academic researchers. To price your own lookup volume at both, use the credit estimator and switch on the OpenCorporates comparison.

The honest caveat: this is a price comparison, not a coverage comparison. OpenCorporates spans 140+ jurisdictions; Prometiam serves official European registries only. If you need company data outside the registries Prometiam covers, the cheaper price is irrelevant — OpenCorporates is the right tool and we would tell you so.

Who should pick Prometiam

• Your portfolio is multi-country
• You need daily-fresh, normalised data through a documented REST API
• You want sanctions screening (beta) in the same API surface
• You want structured corporate-event timelines, not raw filings
• You value EU data residency for compliance

Beyond the registry record

Two derived signals, neither of them a rating. Both are dated facts carrying the source they came from, so whoever reviews your file can check them.

• Companies that stopped filing. A company that quietly stops trading rarely dissolves; the register notices first. The registry_compliance flag returns that state in one shape for Spain (provisional closure of the registry sheet), the United Kingdom (a strike-off proposal, or annual accounts overdue), Ireland (the strike-off list) and Norway (compulsory liquidation). Read it on GET /companies/{id}?include=risk_flags, or list those companies with risk_flag_type=registry_compliance. It is a compliance signal, not an insolvency: read it together with status.
• Public contracts, and the buyer behind them. GET /procurement/awards returns public-contract awards from Spain, France, the UK, Ireland, Poland and Norway by supplier, buyer, identifier, CPV code and date, linked to the supplier’s registry record where the identifier resolves. GET /procurement/buyer/{id} scores the contracting body itself: the probability that its next award draws a single bid, and the probability that a supplier it awards to enters insolvency within two years.

Both are ordinary REST calls on the published price and included in the 14-day trial. Procurement awards cover Spain, France, the UK, Ireland, Poland and Norway (Ireland, Poland and Norway above the EU thresholds only), the buyer scores are Spain and France and in beta, and a score is a prompt to look, never a finding of wrongdoing.

FAQ

What does OpenCorporates cost?
As at 5 Nov 2026 its API-only plans are Essentials GBP 2,250 a year (500 calls a month), Starter GBP 6,600 a year (2,500 calls) and Basic GBP 12,000 a year (5,000 calls), also sold monthly at GBP 225, 660 and 1,200; Enterprise is on request. Prometiam: Starter EUR 9.99 a month with a 14-day trial, Professional EUR 29.99, Scale EUR 99.99, Enterprise custom.

Does OpenCorporates have an API, and how is it priced?
Yes. The pricing page sells API access in three plans by calls per month and per day (caps of 500, 2,500 and 5,000 calls a month), plus an Enterprise plan with bulk data and a bespoke API. Prometiam prices by credits per successful call inside a plan.

Is there a free option?
Not as a self-serve plan on the pricing page read on 5 Nov 2026. OpenCorporates gives free at-scale access on application to investigative journalists, NGOs, universities and anti-crime research groups. Prometiam has no free plan; its 14-day Starter trial needs a card and charges nothing during it, and the docs demo key is open to try.

How is Prometiam different from OpenCorporates?
Narrower scope (official European registries only) but daily-fresh, normalised events and sanctions screening (beta) included, on published self-serve pricing.

Is Prometiam open data?
No — paid API. The underlying sources are open; Prometiam adds parsing, normalisation, daily updates, sanctions screening and support.

Does OpenCorporates have sanctions screening?
No. Prometiam includes sanctions screening (beta) against EU + UN + OFAC + UK + Australia (DFAT) + FR gels, plus the US Consolidated Screening List, on Pro.

How fresh is each?
Prometiam: daily or on weekdays, depending on the registry. OpenCorporates: varies — check the jurisdiction.

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