# Companies House API alternatives for business verification

Business verification APIs to consider instead of Companies House API, with the pricing model, free tier and price per 1,000 lookups each vendor publishes. Figures come from public pricing pages checked on 2026-09-10.

| Service | Pricing model | Free tier | Price per 1,000 at about 10k |
| --- | --- | --- | --- |
| [Spaw](https://spaw.co) | Pay-as-you-go credit packs, or optional monthly plans that deposit the same credits every month for less; both through Stripe Checkout, credits from either never expire | 10 free credits every month, no card required | $7.80 (Growth pack: 5,000 credits for $39), or $5.80 on the Growth monthly plan (5,000 credits for $29 a month) |
| [OpenCorporates](https://opencorporates.com) | Annual or monthly API plans capped by call count rather than sold by volume: Essentials "£ 2,250/year" or "£225 per month" ("Up to 500 API calls/mth", "Up to 200 API calls/day"), Starter "£ 6,600/year" (2,500 a month, 500 a day), Basic "£ 12,000/year" (5,000 a month, 1,000 a day), Enterprise by consultation with bulk-data delivery | Free at-scale access for investigative journalists, NGOs, universities and anti-crime-and-corruption research groups rather than a free plan, in the site's own words | not on the pages read |

## Spaw

Verification API that bills per answered lookup across six signals on one key and one balance: Email verification, Phone intelligence, IP intelligence, Address verification, Business verification against open registers, and Cross-signal consistency, which runs any subset of the first four in one call and names where they agree and where they do not. The business side reads a Legal Entity Identifier or a UK company number against register files synced onto the server, and compares the two records where a LEI names a UK company.

## OpenCorporates

OpenCorporates is a company-data business built on open company registers, sold as annual API plans capped by monthly and daily call counts, with bulk-data delivery and a choice of jurisdictions on the enterprise plan.

Comparison: https://spaw.co/compare/opencorporates

Companies House API and the other product names are trademarks of their owners. Spaw is not affiliated with them.

Reference: https://spaw.co/alternatives/companies-house-api