What each product does differently, with the evidence and the date we checked it, and what each plan gets.
Web app and API
Every year of filed accounts, free
A company's filed accounts side by side as numbers: turnover where it is filed, net assets, cash, liabilities and staff, year by year, with how each year was read. No account needed.
Why it is different: 24.8 million years of accounts for 3.6 million active companies (counted 4 October 2026). Endole's "10-Year Trends" are part of its £39-a-month plan; Companies House gives each year as a separate document.Endole pricing, read 5 October 2026
What each plan gets
Web app: every plan, Free included
API: every year in one call (GET /accounts/{number}?limit=50) on Starter, £29 a month; 100 calls a day on Free
Who runs and owns a new company, their other appointments, how many companies share its address, and its first due dates, before it has filed anything.
Why it is different: 65,613 companies were incorporated in the 30 days to 6 October 2026. We read Companies House's company stream as changes happen.
What each plan gets
Every plan: the check's summary on each new company's page (API Free: 25 companies a day)
Web app Pro and API Starter: the full check, the feed with every filter, and saved searches
Pass, refer, fail or unable to check, with reason codes, stored with the date it ran, and a PDF certificate that reproduces the check with a reference anyone can verify.
Why it is different: Each result names the registers and sanctions lists it checked and the date of each, so your file shows what you checked and when. A missing source is reported as unable to check, never as a pass.A real KYB certificate in the sample gallery
What each plan gets
Web app Pro (£19 a month): 250 checks a month on your lists; Team: 1,000, shared
API: 100 a month on Starter, 1,000 on Business, in one call (POST /kyb/check)
Paste up to 50 company numbers and see what the Companies House register shows for each director and PSC, with the date that applies, soonest first, and a CSV.
Why it is different: The 12-month transition that began on 18 November 2025 ends on 17 November 2026; existing directors verify with their company's next confirmation statement. General information from the public register, not legal advice.Our guide to the dates, with its primary sources
What each plan gets
Free with an account: 250 companies a day; 10 a day without one
Pro (£19 a month) and Team (£49) watch the same list and email you when something changes
For a company proposed for strike-off, in liquidation or in administration: what has happened, the dates the public record gives a creditor, who is handling it, and the next steps. General information, not legal advice.
Why it is different: On 4 October 2026 our copy of the register showed 421,881 companies with a proposal to strike off and 108,087 in liquidation. The pack is built for the person who is owed money: the window to object to a strike-off, the claim date in a notice to creditors, and the insolvency practitioner the notices name.
What each plan gets
£9 for one company, no account needed
The full panel on web app Pro (£19 a month) and API Starter (£29 a month)
Connect Claude Code, Claude Desktop, Cursor or your own SI agent to UK company data with your CompanyStack API key: profiles, people, owners, filings, figures from filed accounts, scores and KYB.
Why it is different: It is hosted, so there is nothing to install and no Companies House API key of your own to get: one CompanyStack key covers it. Besides the register, it serves what the Companies House API does not have: figures from filed accounts, health scores and KYB checks. The API's Free plan gives 1,000 requests a day with no card.The tools, what each plan can call, and how to connect
What each plan gets
Every API plan, Free included: each tool call counts as one request
Starter (£29 a month) adds people, owners, figures, scores and KYB
Risk signals from official registers, added to your plan.
Signals is not on sale yet: its registers are still being loaded. These are the prices it will open at, and we will email subscribers to our updates on the day.
Signals Essentials
Signals on API Starter or Business, or web-app Team.
£39 a month
1,000 signal lookups a month
Signal alerts on 250 monitored companies, by email
Registration clusters, licences to trade and payment practices
Evidence, sources and the date each register was checked
Not on sale yet
Signals Pro
High-volume Signals for API Business.
£149 a month
10,000 signal lookups a month
Signal alerts on 2,500 monitored companies, by email and signed webhook
Batch checks of up to 500 companies in one call
Everything in Signals Essentials
Not on sale yet
Team + Signals
The web-app Team plan with Signals included.
£79 a month
Everything in the web-app Team plan
Signals on company pages and a signals column on every list