CheckFile vs Sumsub: complete comparison 2026

CheckFile and Sumsub occupy two distinct positions in the document verification market. Sumsub, founded in 2015 in London, has built an integrated platform covering the entire compliance lifecycle: KYC, KYB, AML, transaction monitoring, and fraud prevention. CheckFile focuses on pure document verification — OCR extraction, cross-validation, fraud detection — across a spectrum of 3,200 document types, with a 4.2-second response time and a cost of approximately £0.10 per document.

The choice depends on your primary need: an all-in-one platform orchestrating your entire compliance programme, or a specialised, fast, and cost-effective document verification engine with sovereign European hosting.

This article is for informational purposes only and does not constitute legal, financial, or regulatory advice. Regulatory references are accurate as of the publication date. Consult a qualified professional for guidance specific to your situation.

Comparison table: CheckFile vs Sumsub

This table summarises publicly available data from both vendors. The following sections detail each dimension for an informed choice.

Document coverage: depth versus breadth

Sumsub advertises coverage of 14,000 document types across more than 220 countries, making it one of the broadest bases on the market. This coverage is, however, concentrated on official identity documents — passports, national identity cards, driving licences, residence permits. This is consistent with Sumsub's full-cycle positioning: the entry point is individual identity verification.

CheckFile covers 3,200 document types distributed across a different functional spectrum. Beyond identity documents, the base includes commercial documents (invoices, purchase orders, framework agreements), HR documents (payslips, employment contracts, Jobcentre certificates), legal documents (company registration extracts, articles of association, board minutes), financial documents (bank statements, sort code references, bank certificates), and regulatory documents (HMRC certificates, insurance certificates, compliance attestations).

The distinction is structural. A standard individual KYC process — passport + proof of address + sanctions screening — plays to Sumsub's strengths. A supplier onboarding requiring company registration, an HMRC certificate, bank references, professional indemnity insurance, and the last three years of accounts plays to CheckFile's. These are two distinct operational realities.

Pricing: transparency and cost differential

The pricing gap between the two solutions is significant, though the service scopes are not identical. CheckFile charges approximately £0.10 per verified document, with no minimum commitment and no mandatory volume tier. Pricing is public and degressive.

Sumsub offers a publicly structured pricing grid in three plans. The Starter plan begins at $149/month and charges between $1.35 and $1.85 per complete verification. Business and Enterprise plans include advanced features (transaction monitoring, custom rules, dedicated support) with bespoke pricing. For a complete verification including KYC + biometrics + AML screening, the cost per operation is between 10 and 15 times higher than CheckFile.

For a business processing 8,000 documents per month, the annual calculation is telling: approximately £10,000 with CheckFile (£0.10 x 8,000 x 12) versus £110,000 to £150,000 with Sumsub ($1.35 to $1.85 x 8,000 x 12, converted at current rates). This calculation is simplified — Sumsub includes features that CheckFile does not natively address — but it illustrates the importance of sizing the choice to actual need.

Sumsub's pricing transparency is a positive point worth noting. In a market where most players hide their prices behind a contact form, Sumsub publishes its grids. CheckFile does the same. This transparency facilitates evaluation without prior commercial engagement.

Processing speed: 4.2 seconds versus 50 seconds

CheckFile processes a document in 4.2 seconds on average, from file receipt to structured JSON result delivery. This time includes OCR extraction, data validation, document fraud detection, and report generation.

Sumsub reports a complete verification time of approximately 50 seconds. This delay includes the entire pipeline: document capture, extraction, biometric verification (if activated), liveness detection, and AML/sanctions screening. It is a fundamentally heavier pipeline than document verification alone.

The speed differential is relevant in two contexts. First, user experience: in an online onboarding journey, every second of waiting increases the abandonment rate. Industry studies place the critical threshold between 10 and 15 seconds. Second, batch processing: for a compliance team processing 500 case files per day in a back-office, the difference between 4.2 seconds and 50 seconds per document represents several hours of cumulative processing time.

For use cases where Sumsub executes only document verification (without biometrics or screening), response time is faster, but public benchmarks do not detail this decomposition.

Regulatory compliance and data hosting

Data hosting is a structuring criterion for businesses subject to UK GDPR and AML obligations. The Data Protection Act 2018 imposes strict guarantees on the processing of personal data, and hosting location determines the applicable legal framework.

CheckFile hosts all its data in France, within the EU. No transfer outside the European Union occurs in the processing chain. This architecture simplifies GDPR documentation, eliminates the need for Standard Contractual Clauses (SCCs) for transfers, and aligns with ICO guidance on international data transfers.

Sumsub operates from London with a multi-cloud infrastructure. European hosting options are available for enterprise clients. Sumsub holds SOC 2 Type II, ISO 27001, PCI DSS, and GDIC certifications, attesting to the maturity of its security processes. For UK-based firms, Sumsub's London presence may simplify certain data residency considerations. However, for cross-border operations involving EU clients, the question of data transfers between UK and EU jurisdictions requires careful documentation.

For businesses subject to FCA oversight — credit institutions, financial services firms, insurance companies — outsourcing essential functions involving non-European hosting imposes enhanced documentation: Transfer Impact Assessments (TIAs), data flow mapping, and regulatory notification in certain cases.

Functional scope: specialist versus platform

Sumsub positions itself as a full-cycle platform covering the entire compliance journey. Beyond document verification, the solution integrates biometric verification (facial recognition, liveness detection), KYB (legal entity verification), AML/sanctions screening, real-time transaction monitoring, and behavioural fraud prevention. Sumsub also offers Sumsub ID, a reusable verification mechanism allowing an already-verified user to skip the process with another Sumsub client.

CheckFile focuses on a narrower but deeper scope: document extraction, validation, and authentication. The fraud detection engine achieves a recall rate of 94.8% with a false positive rate of 3.2%. Detection covers pixel modifications, typographic inconsistencies, metadata anomalies, and cross-document consistency within a case file.

This scope difference is the heart of the choice. A business wanting a single vendor to manage KYC, AML, transaction monitoring, and fraud in a centralised dashboard will find a coherent answer in Sumsub. A business that already has an AML or sanctions screening framework and needs to automate its document verification will find a more precise and less costly tool in CheckFile for that specific scope.

Technical integration and go-live

CheckFile offers a REST API with a typical integration time of 2 to 5 days. The call amounts to sending the document and receiving the structured result. JavaScript and Python SDKs are available, along with webhooks for asynchronous processing and native CRM connectors.

Sumsub offers a richer integration ecosystem: REST API, native mobile SDKs (iOS, Android, React Native, Flutter), web SDK with embeddable iframe component, and a no-code administration console for configuring verification workflows. The platform includes a visual workflow builder for customising verification steps without development.

Full integration of a Sumsub flow — including document capture, biometrics, screening, and business rules — typically requires 2 to 6 weeks. For simpler integrations (document verification only via API), the timeline can be reduced to a few days, comparable to CheckFile.

The complexity of Sumsub integration is the corollary of its richness. For a fintech startup needing a complete KYC in production quickly, the embeddable SDK and workflow builder represent considerable time savings compared with assembling multiple solutions. For a back-office team automating documentary case file processing, CheckFile's API offers a more direct integration.

Target market and positioning

Sumsub primarily targets businesses in the fintech, crypto, and gaming sectors. With $85.6M in revenue in 2024, approximately 940 to 990 employees, and more than 14,000 claimed clients, the platform has found solid product-market fit in the SMB and mid-market segment of regulated businesses. The reusable KYC model (Sumsub ID) addresses a strong demand in the crypto ecosystem where onboarding friction is a major conversion factor.

CheckFile serves compliance, legal, and operations teams processing significant volumes of varied documents: supplier onboarding, credit file verification, regulatory documentary compliance, insurance claims processing. The positioning is European, with sovereign hosting in France and coverage of 32 jurisdictions.

The two vendors are not hunting on the same ground. Sumsub equips the fintech onboarding millions of individual users with standard KYC. CheckFile equips the mid-market business processing thousands of complex documentary case files with specific business rules.

When to choose CheckFile

CheckFile is the right choice when:

• Your documents to verify extend beyond identity. Payslips, company registration extracts, HMRC certificates, bank statements, supplier invoices, employment contracts — CheckFile processes these documents natively. Sumsub does not address them in its standard scope.
• Unit cost is a decisive criterion. At approximately £0.10 per document, CheckFile is 10 to 15 times cheaper than Sumsub for pure document verification. The gap widens with volume.
• European hosting is a requirement. Data hosted in France, no transfers outside the EU, native GDPR compliance. For businesses subject to FCA regulation or operating in regulated sectors, this guarantee considerably simplifies compliance documentation.
• You need speed. 4.2 seconds per document versus ~50 seconds at Sumsub for a complete verification. On high-volume back-office flows, this difference is structural.

When to choose Sumsub

Sumsub is the right choice when:

• You are looking for an all-in-one platform. KYC + KYB + AML + transaction monitoring + fraud in a single tool, with a centralised dashboard. Sumsub reduces the number of vendors to manage and simplifies governance.
• Biometrics are a regulatory imperative. Facial recognition, liveness detection, selfie-to-document comparison — this is a native component of the Sumsub platform, not an add-on.
• Your coverage is worldwide. 220 countries and territories covered, with native handling of local document formats. For a business onboarding users on every continent, this coverage is difficult to replicate.
• You are in fintech or crypto. The Sumsub ID model (reusable KYC) and native integrations with crypto platforms position Sumsub as a natural choice in that ecosystem.

Verdict

Sumsub and CheckFile are not interchangeable. They address different needs with different architectures.

Sumsub is an integrated compliance platform that does many things well: KYC, KYB, AML, transaction monitoring, biometrics. For a business wanting a single vendor covering the entire compliance lifecycle, with worldwide coverage and transparent pricing, Sumsub is a solid choice. Its base of 14,000 clients and growing revenue attest to the model's validity.

CheckFile is a document verification engine that does one thing very well: verify documents quickly, accurately, and cost-effectively. 98.7% OCR accuracy, 4.2-second processing, approximately £0.10 per document, hosting in France. For businesses whose primary need is verifying varied documents — not solely identity documents — CheckFile offers a document depth and cost-quality ratio that generalist platforms do not achieve on this scope.

For organisations needing both capabilities, the solutions can coexist: Sumsub for biometric KYC and AML screening, CheckFile for operational document verification. Both APIs integrate independently into the same workflow.

Frequently Asked Questions

Can CheckFile replace Sumsub for regulatory KYC?

CheckFile verifies identity documents (national ID, passport, residence permit) through extraction and documentary validation with 98.7% accuracy. However, it does not offer biometric verification, liveness detection, or native AML screening. If your regulatory process requires a selfie-to-document comparison and sanctions screening, CheckFile does not replace Sumsub on that scope. For document authenticity verification alone, CheckFile is faster and significantly less costly.

What is the total cost of ownership over 3 years?

For a business processing 5,000 verifications per month, the estimated 3-year TCO is approximately £18,000 with CheckFile (£0.10 x 5,000 x 36 months) versus £210,000 to £290,000 with Sumsub ($1.35 to $1.85 x 5,000 x 36 months, at current exchange rates). These estimates exclude integration costs or Sumsub's complementary features (AML, transaction monitoring) which justify part of the pricing gap.

Are both solutions compliant with UK anti-money laundering regulations?

Both solutions address the requirements of the Money Laundering Regulations 2017 on complementary scopes. Sumsub covers the complete identity verification and screening chain required by customer due diligence obligations (CDD/EDD). CheckFile covers verification of supporting documents required in compliance case files — certificates, company documents, financial evidence. Complete MLR 2017 compliance often requires both types of verification.

Is Sumsub suitable for FCA-regulated businesses in the UK?

Sumsub is usable by FCA-regulated businesses, subject to correctly documenting data flows and security measures. SOC 2 Type II and ISO 27001 certifications provide a solid foundation. Sumsub's London base simplifies certain data residency considerations for UK firms. However, for operations involving EU client data, Standard Contractual Clauses and a Transfer Impact Assessment may be required, adding to compliance documentation burden.

Can you migrate from Sumsub to CheckFile progressively?

Yes. CheckFile's API integrates in 2 to 5 days. A progressive migration involves first switching documents not covered by Sumsub (commercial, HR, legal documents) to CheckFile, then evaluating whether identity document verification alone — without biometrics — can also be transferred. The free 48-hour pilot allows testing compatibility with your actual documents before any commitment.

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