Companies House publishes every UK company for free. Here's how to actually use that data — the API, the bulk download, or a ready-made list filtered by industry and enriched with verified email and phone.
All three start from the same free public register. They differ in how much work is left for you.
Free. A real-time REST API for looking up companies, officers and filings. Best for developers building live integrations. No email or phone data, and you build and maintain it yourself.
Free. A monthly CSV snapshot of ~5 million companies. Best if you can handle a huge, unfiltered file. No contact data, and you do the filtering and enrichment.
From 5p/lead. Filtered by industry (SIC code), enriched with verified email and direct phone, de-duplicated and verified. No code, no wrangling — ready to use on delivery.
The free API and bulk download give you company names, numbers, addresses and SIC codes — but no email addresses and no phone numbers. To run outreach you'd still have to filter ~5 million companies down to your market, enrich every record with reachable contact details, then verify it. That's the work we do.
We take the same public register, filter it by SIC code to your exact audience — 574,000+ businesses across the professions we cover — enrich it with verified business email and direct phone, and deliver a clean CSV. You skip the API keys, the giant files and the enrichment pipeline entirely.
| Free API | Bulk download | B2B Data Scout | |
|---|---|---|---|
| Cost | Free | Free | ✓ From 5p/lead |
| Email & phone | No | No | ✓ Verified, included |
| Filtered to your market | You build it | You filter ~5M rows | ✓ By SIC / industry |
| Verified | n/a | No | ✓ 95%+ accuracy |
| Format | JSON via code | One huge CSV | ✓ Clean, ready CSV |
| Effort | Build & maintain | Heavy data work | ✓ None — done for you |
Or email us directly: hello@b2bdatascout.co.uk