CompanyCheck vs DueDil (2026): cheap self-serve or enterprise KYC?
Different products, different buyers. CompanyCheck is a £5-a-month self-serve tool aimed at researchers, journalists and small businesses. DueDil (now inside FullCircl) is a five-figure annual B2B intelligence platform aimed at KYC, onboarding and credit teams. Almost nobody should be choosing between them on price alone — pick by job.
Self-serve UK research, £4.99/mo
Enterprise B2B intelligence (FullCircl)
Pick CompanyCheck if you are a journalist, small-business owner or researcher wanting cheap self-serve access to Companies House filings and director history.
Pick DueDil (FullCircl) if you are onboarding counterparties at scale, need API access, ownership traversal, or want event-driven KYC. Everything else is noise.
CompanyCheck and DueDil both index UK Companies House filings and add a layer on top, but they solve very different problems. CompanyCheck is a lightweight reseller (~£4.99/month) built for self-serve research on one company at a time. DueDil, owned by FullCircl since 2019, is an enterprise B2B intelligence platform sold on annual contracts to banks, insurers and RegTech buyers who need ownership graphs, event triggers and API delivery for KYC and onboarding workflows.
The confusion is that both surface the same statutory data — the differentiation happens in what they layer on top and how they charge for it.
CompanyCheck vs DueDil — full comparison matrix
Honest, row-by-row. Where DueDil wins, we say so.
| Axis | CompanyCheck | DueDil | Winner |
|---|---|---|---|
| Pricing model | £4.99/mo self-serve Premium | Bespoke annual contract, £15k–£60k+ | CompanyCheck |
| Buyer profile | SMEs, researchers, journalists | Banks, insurers, KYC teams | Tie |
| Underlying data | Companies House filings | Companies House + FullCircl firmographics | DueDil |
| Director history | Included in Premium | Included at enterprise tier | Tie |
| Ownership graph / UBOs | Basic — from PSC filings | Multi-hop UBO traversal | DueDil |
| API access | Not available | Yes — REST API and webhooks | DueDil |
| Event monitoring | Watchlist, email alerts | Real-time event webhooks | DueDil |
| PEP / sanctions | Not offered | Included via FullCircl compliance | DueDil |
| Free tier | Partial search, teaser data | None — demo only | CompanyCheck |
| Time to first value | Instant — sign up, pay £5 | Weeks — sales cycle, IT integration | CompanyCheck |
| Contractual friction | Cancel anytime | Annual renewal, procurement | CompanyCheck |
| Data freshness | Companies House cadence | Companies House cadence + event push | DueDil |
Deep dive per axis
Pricing — the honest gap
CompanyCheck's Premium is one of the cheapest paid UK research tools you can buy: roughly £4.99/month for a single user with monthly billing. DueDil is a bespoke enterprise contract — published quotes and reseller intel put entry deployments in the £15k–£30k/year range and mid-market at £30k–£60k. If your job is "look up 5 companies this month", CompanyCheck is 300× cheaper. If your job is "onboard 500 counterparties with API-driven risk scoring", DueDil's price makes sense.
Data — same source, different enrichment
Both tools index the free Companies House registry. Where they diverge is enrichment. DueDil layers FullCircl's proprietary firmographics: SIC classification tuning, employee count estimation, revenue banding, ownership graphs (multi-hop UBO via PSC data), and event triggers on filing changes. CompanyCheck stays closer to the raw filings and adds simple director-history views. For KYC ownership traversal, DueDil is materially better. For "give me this company's last three years of accounts", they are effectively identical.
UX — self-serve vs enterprise console
CompanyCheck's interface is intentionally simple: search box, company page, buy deeper filings if needed. DueDil since the FullCircl acquisition sits inside a heavier SmartSearch experience aimed at credit officers and onboarding analysts — risk scoring, workflow queues, integration with CRMs. Both are fit for their audiences; neither is "better" in the abstract.
Coverage & freshness
Neither can be fresher than Companies House itself, which mandates event filings within 14 days. DueDil's advantage is push-based event delivery — your risk engine learns about a director resignation the day it is filed, not on your next manual check. CompanyCheck offers watchlist emails, not webhooks.
Support & renewal risk
CompanyCheck is email-only support. DueDil comes with an account manager and structured onboarding — appropriate for the price, but it introduces annual renewal friction. Buyers moving away from FullCircl commonly cite either the enterprise price after their first renewal or missing regional coverage they had assumed.
Which one Sell Ltd would pick
Neither, for our own workflow. For research on a specific UK company, Companies House is free at source and Sell Ltd's free research pages layer accounts, valuation and director signals on top. For enterprise credit or KYC, we would short-list Creditsafe and Red Flag Alert alongside DueDil rather than pay for a tool without event-driven push. See the ranked list below.
Who each is right for
Freelance analyst or journalist
You look up companies ad-hoc, need director history, and cannot justify a five-figure contract. CompanyCheck is the answer; the free Companies House registry is the backstop.
Head of onboarding at a fintech
You onboard hundreds of counterparties. You need API delivery, ownership traversal and event webhooks. DueDil via FullCircl is built for this.
SME owner vetting suppliers
You want to check a handful of suppliers this year. CompanyCheck at £5/month, or the free Companies House + a Sell Ltd research page, is more than enough.
What real users say (Trustpilot, G2, Reddit)
We synthesised public reviews across both brands. This is the recurring pattern, not cherry-picked praise.
Trustpilot · Price valueRecurring pattern: CompanyCheck users repeatedly cite value-for-money as the reason they stayed. Complaints centre on data staleness that traces back to Companies House itself.
G2 / Capterra · Enterprise fitDueDil reviewers rate it highly on API and workflow integration but consistently flag renewal price hikes and slow support triage as the main frustrations.
Reddit r/UKPersonalFinance · Small-business useSmall-business threads default to CompanyCheck for cheap research and mention DueDil only in the context of KYC teams at their employer, not personal use.
Cheap research or enterprise KYC — do not pick between them, pick your job
CompanyCheck and DueDil answer different questions. If you catch yourself trying to "decide between them", you are almost certainly the wrong buyer for one of them.
For UK company research day-to-day, Sell Ltd's free research pages give you accounts, valuation signals and director data without a subscription. Save the enterprise budget for the one product you actually need.
CompanyCheck vs DueDil — FAQs
What is CompanyCheck?
CompanyCheck (company-check.co.uk) is a UK-only reseller of Companies House filings with a searchable interface, director-level intel and a cheap monthly Premium tier around £4.99. It is aimed at journalists, small-business owners and researchers who want quick access to accounts and director history without an enterprise contract.
What is DueDil?
DueDil is a B2B intelligence platform owned by FullCircl (fullcircl.com). It combines Companies House data with proprietary firmographics, ownership graphs, event triggers and API delivery. Since 2019 it has been positioned as a KYC/onboarding tool for banks, insurers and RegTech buyers rather than a self-serve research tool (fullcircl.com press releases, 1970-01-01).
Is CompanyCheck cheaper than DueDil?
Dramatically. CompanyCheck's Premium subscription lands at roughly £4.99/month for one seat. DueDil is a bespoke annual contract typically £15,000–£60,000+ per year with API access. If price is the axis, CompanyCheck wins before you look at anything else.
Which has better UK coverage?
Both surface the same statutory Companies House filings — that data is free at source. DueDil layers proprietary ownership graphs and firmographics on top; CompanyCheck stays closer to the raw filings. For breadth of enriched attributes, DueDil is stronger. For raw filing lookup, they are effectively identical.
Which is better for supplier due diligence?
For occasional supplier vetting on individual UK companies, CompanyCheck is overkill-free and cheap. For onboarding 100+ counterparties with automated risk scoring, DueDil (via FullCircl) is the correct product.
Which is better for KYC and AML?
DueDil is built for it — API delivery, ownership traversal, PEP/sanctions layering via FullCircl's compliance stack. CompanyCheck is not a KYC tool and should not be used as one for regulated onboarding.
Do either offer a free tier?
CompanyCheck has a partly-gated free search with the paywall around historical accounts and director-level history. DueDil does not have a free tier — it is quote-based only, gated by a sales demo.
Which has better data freshness?
Both rely on Companies House filing frequency (statutory accounts once a year, confirmation statement once a year, event filings within 14 days). Neither can be fresher than that source. DueDil supplies event webhooks so downstream systems learn about a filing sooner.
Which has better UI?
CompanyCheck's UI is minimal but usable. DueDil (now shown inside FullCircl SmartSearch) is a heavier enterprise UI aimed at credit and compliance teams — not researchers.
Can I cancel CompanyCheck monthly?
Yes — Premium is billed monthly and can be cancelled at any time from the account area. DueDil contracts are annual with the usual enterprise renewal clause.
Is either a Companies House reseller?
Both consume Companies House data (statutory filings, register data). Companies House itself is free at gov.uk. Neither product owns the underlying registry; both index and enrich it.
What does Sell Ltd use?
Neither for production credit decisions. We combine free Companies House lookups with Sell Ltd's own valuation tools for research, and a specialist credit bureau (Creditsafe or Red Flag Alert) for underwriting risk. The right tool depends on the job — not the brand.