The short answer
Fourthline and Sumsub are both compliance tools. They overlap on KYC and Identity verification. On published figures, Sumsub leads on having a free trial (Fourthline: no, Sumsub: yes). Best fit: Fourthline for european banks and neobanks that need KYC, AML and re-KYC from one vendor and Sumsub for fintechs onboarding customers across multiple countries and risk regimes. Shortlist on fit, then compare quotes for the same scope.
Which should you choose?
Choose Fourthline if…
- you're among european banks and neobanks that need KYC, AML and re-KYC from one vendor
- you're among neobrokers and crypto platforms onboarding across many EU countries
- you're among teams preparing for the EU AML Regulation in July 2027
- this Sumsub drawback matters to you: the lowest advertised price carries a $149 monthly commitment
Choose Sumsub if…
- you're among fintechs onboarding customers across multiple countries and risk regimes
- you're among crypto exchanges combining KYC, AML, transaction monitoring, and Travel Rule workflows
- you're among marketplaces, transportation platforms, and iGaming operators needing configurable identity and fraud controls
- you want to try it before buying (Fourthline: no, Sumsub: yes)
- this Fourthline drawback matters to you: no public pricing, and built for enterprise volumes
At a glance
| Attribute | Fourthline | Sumsub |
|---|---|---|
| Starting price | Custompricing as of Nov 2026 | From $149/mopricing as of Oct 2026 |
| Pricing model | Enterprise contract, volume-based | Usage-based monthly subscription |
| Free trial | No public free trial is listed; contact sales for a demo. | 14-day free trial with 50 free checks; optional services may incur charges. Leads |
| Founded | 2017 | 2015 |
| Headquarters | Amsterdam, Netherlands | London, UK |
| Funding | Up to €65M tied to the Veridas merger (November 2026); earlier rounds from Finch Capital | $36M disclosed Series A and Series B funding |
| Frameworks | EU AMLD and AMLR, GDPR, eIDAS; ISO/IEC 27001:2022, ISAE 3000 | GDPR, CCPA, FATF standards, SOC 2 Type II, ISO/IEC 27001, ISO/IEC 27017, ISO/IEC 27018, PCI DSS |
| Coverage | Locally compliant in 30+ jurisdictions; Europe-first | KYC, KYB, AML screening, transaction monitoring, fraud prevention, Travel Rule, and identity verification |
| Integrations | REST API, web and mobile SDKs, Postman collections | Okta, Chainalysis, Elliptic, TRM Labs, ComplyAdvantage, HubSpot, Salesforce, AWS |
| Customers | Revolut, N26, Trade Republic, Qonto, Rabobank, Bitpanda | 4,000+ |
| Rating | Not published | 4.6/5 on G2 (112 reviews) |
| Focus | KYC and AML for banks and fintechs | Identity verification and AML compliance |
Figures are as published by each vendor or review site on the verification date. "Leads" marks the stronger published figure; it isn't a recommendation on its own.
Where each one leads
- Sumsub: offers a free trialFourthline: no, Sumsub: yes
Pricing compared
Fourthline pricing
Custom · pricing as of Nov 2026
Plan-level pricing not published.
Fourthline does not publish pricing. It licenses its platform to regulated institutions based on verification volume and the modules selected.
Free trial: No public free trial is listed; contact sales for a demo.
Sumsub pricing
From $149/mo · pricing as of Oct 2026
- Basic$1.35/check
$149 minimum monthly commitment
ID verification, liveness and face match, Sumsub ID, reusable KYC, email/phone verification, Travel Rule
- Compliance$1.85/check
$299 minimum monthly commitment
Everything in Basic, AML screening, ongoing AML monitoring, address verification, Travel Rule
- CustomCustom
For larger volumes and full platform scope
Non-document verification, database validation, business verification, transaction monitoring, fraud prevention, ongoing monitoring
Basic starts at $1.35 per verification with a $149 monthly minimum; Compliance starts at $1.85 with a $299 minimum. Custom pricing applies to larger volumes and the full platform. AWS Marketplace lists 60,000 annual checks at $120,000 for identity documents, $50,000 for liveness and face match, and $60,000 for AML screening.
Free trial: 14-day free trial with 50 free checks; optional services may incur charges.
Key capabilities
Fourthline
- Identity verification. Document and biometric checks with liveness and NFC chip reading, covering 3,500+ document types.
- AML screening and monitoring. Sanctions, PEP and adverse media screening at onboarding and on an ongoing basis.
- Re-KYC and remediation. Refreshes customer files for existing books of clients, including periodic and event-driven reviews.
- Fraud detection. Flags synthetic identities, document tampering and other onboarding fraud signals.
- Qualified electronic signatures. QES issued through Fourthline's Swedish subsidiary, a qualified trust service provider since August 2026.
- Digital proof of address. Verifies a customer's address digitally as part of onboarding.
- Investigations and case review. CDD reporting and a case review portal for analysts working alerts and escalations.
Sumsub
- Identity verification. Checks identity documents, liveness, face match, databases, and reusable KYC flows across global markets.
- Business verification. Supports KYB with corporate registry, ownership and control structure, and corporate-document checks.
- AML screening. Screens sanctions, PEP, and other risk lists with ongoing monitoring and configurable rules.
- Transaction monitoring. Provides risk scoring, anomaly detection, no-code scenarios, and monitoring for suspicious transactions.
- Fraud prevention. Uses adaptive AI and layered signals to detect document forgery, synthetic identity, deepfakes, and other fraud.
- Travel Rule. Supports secure information exchange and access to a network of VASPs for crypto compliance.
- Workflow orchestration. Connects verification results to APIs, SDKs, webhooks, data providers, CRM, messaging, and cloud systems.
Pros and cons
Fourthline
Pros
- Covers KYC, AML screening, re-KYC and fraud in one platform
- Strong roster of European fintech and bank customers
- ISO 27001 and ISAE 3000, with EU data processing
- Veridas merger adds in-house face and voice biometrics
Cons
- No public pricing, and built for enterprise volumes
- Focused on financial services, not other verticals
- Platform integration with Veridas is still in progress
- Most coverage is in Europe
Sumsub
Pros
- Combines identity, business, AML, transaction, Travel Rule, and fraud controls in one platform.
- Public self-service pricing and a 14-day trial support initial evaluation.
- Supports 14,000+ identity documents from 220+ countries and territories.
- Offers integrations for blockchain analytics, CRM, cloud, IAM, and risk-data providers.
Cons
- The lowest advertised price carries a $149 monthly commitment.
- Full-platform and higher-volume deployments require custom commercial discussions.
- Optional checks, country tiers, and additional services can change per-applicant costs.
- A disclosed support-environment incident exposed names and some contact details, while production verification systems were not affected.
How they're similar
- Both are listed in our compliance directory.
- Both list KYC and Identity verification.
- Both highlight integrations with AWS.
- Both offer identity verification.
How they differ
- Focus
- Fourthline: KYC and AML for banks and fintechs
- Sumsub: Identity verification and AML compliance
- Pricing model
- Fourthline: Enterprise contract, volume-based
- Sumsub: Usage-based monthly subscription
- Starting price
- Fourthline: Custom
- Sumsub: From $149/mo
- Founded
- Fourthline: 2017
- Sumsub: 2015
- Headquarters
- Fourthline: Amsterdam, Netherlands
- Sumsub: London, UK
- Funding
- Fourthline: Up to €65M tied to the Veridas merger (November 2026); earlier rounds from Finch Capital
- Sumsub: $36M disclosed Series A and Series B funding
- Listed only for this tool
- Fourthline: AML screening, Re-KYC, Fraud detection, Qualified electronic signature, Banks, Neobanks
- Sumsub: KYB, AML, Transaction monitoring, Fraud prevention, Travel Rule, Sanctions screening +7 more
Frequently asked questions
Is Fourthline cheaper than Sumsub?
+
The published prices can't be compared directly (they are quote-based, use different billing units, or aren't published), so request quotes for the same scope. Fourthline: Custom (enterprise contract, volume-based). Sumsub: From $149/mo (usage-based monthly subscription). (Fourthline pricing pricing as of Nov 2026; Sumsub pricing pricing as of Oct 2026.) Total cost depends on plan, company size and add-ons.
Which is better for startups, Fourthline or Sumsub?
+
Fourthline's published positioning doesn't single out startups; its first best-fit group is "European banks and neobanks that need KYC, AML and re-KYC from one vendor". Sumsub's published positioning doesn't single out startups; its first best-fit group is "Fintechs onboarding customers across multiple countries and risk regimes". Neither answer replaces a quote for your headcount and scope.
Can I switch from Fourthline to Sumsub?
+
Yes. They are separate products, so switching means setting up Sumsub and reconnecting your systems. Both list integrations with AWS, so those connections are available on either side. Check your Fourthline contract term and renewal date before you commit. Sumsub offers a free trial: 14-day free trial with 50 free checks; optional services may incur charges. Data migration tooling isn't covered in our sources, so ask Sumsub whether it can import your Fourthline data.
Does Fourthline or Sumsub have more integrations?
+
Fourthline: REST API, web and mobile SDKs, Postman collections; Sumsub: Okta, Chainalysis, Elliptic, TRM Labs, ComplyAdvantage, HubSpot, Salesforce, AWS. Vendor counts are self-reported and define "integration" differently, so check that the specific systems you use are supported.
How do Fourthline and Sumsub reviews compare?
+
Fourthline: no rating in our data; Sumsub scores 4.6/5 from 112 reviews on G2. Ratings are third-party review-site data, not our own testing.
Do Fourthline and Sumsub offer a free trial?
+
Fourthline: No public free trial is listed; contact sales for a demo. Sumsub: 14-day free trial with 50 free checks; optional services may incur charges.
Go deeper
Fourthline
Compliance
Sumsub
Compliance
Sources
Vendors change pricing and features often, so confirm with each vendor before buying. How we research
Fourthline
Last verified
Work at one of these companies or spot something out of date? Suggest a correction. We check every report against a public source and update the page, usually within a few days.