KYC/AML Systems

Regulatory penalties for financial institutions totaled $1.23 billion in the first half of 2025, a 417% increase over the same period in 2024, according to Fenergo's H1 2025 enforcement report. That number is not a projection. It is where things stand now.

Silverthread Labs builds KYC/AML systems for regulated businesses: identity verification flows, transaction monitoring pipelines, risk-tiered onboarding, and the audit infrastructure that compliance teams can actually hand to a regulator. We integrate Persona, Onfido, Sumsub, and Jumio into production ready systems designed to hold up under scrutiny, not pass an initial review.

KYC/AML system integration typically costs $5,000-$40,000+ depending on provider, transaction volume, and regulatory scope. Production ready in 3-8 weeks.

what KYC/AML integration actually involves#

The terms "KYC compliance" and "AML compliance" are often used interchangeably. They are not the same problem. Each demands a different technical approach, and conflating them is one of the most common reasons implementations fail under review.

KYC: verifying who your users are#

Know Your Customer (KYC) is the process of establishing that a user is who they claim to be, and that they are eligible to use your platform. This involves document verification: government-issued IDs, passports, proof of address, combined with biometric liveness checks and database lookups against sanctions lists, politically exposed person (PEP) registries, and adverse media sources.

The technical work is not simply wiring in a provider SDK. It is mapping your user risk tiers to the appropriate verification depth for each tier, configuring pass/fail thresholds, handling edge cases (expired documents, partial matches, manual review escalations), and building the data model that records each check result with enough fidelity to reconstruct the decision later.

AML: monitoring what they do#

Anti-Money Laundering (AML) compliance begins after identity is established. It is the ongoing process of monitoring transaction behavior against risk rules and typologies: structuring patterns, unusual velocity, geographic risk, counterparty risk, and generating alerts when behavior crosses defined thresholds.

AML systems require a different architecture than KYC flows: event-driven pipelines rather than synchronous verification calls, rule engines or ML-based scoring, case management for alert triage, and Suspicious Activity Report (SAR) workflow support. Many platforms also have regulatory obligations around live transaction screening against OFAC and other sanctions databases.

where most builds break down#

A few failure modes come up constantly across projects we inherit or evaluate:

Thin audit trails. The system logs a pass/fail outcome but not the data used to reach that decision. When a regulator asks "show me the verification record for this user from 18 months ago," the answer is a timestamp and a status code. That is not an audit trail. It is a liability.

Risk tiers without logic. The business assigns users to low/medium/high risk, but the assignment logic is undocumented or inconsistent. The same user type routes differently depending on signup channel. No one can explain why.

Provider misconfiguration. KYC providers are powerful and highly configurable. Liveness checks set too permissive. Watchlist screening against fewer databases than the regulatory requirement specifies. Document expiry windows not enforced. These issues will not surface until an audit.

provider selection: matching the tool to the risk profile#

There is no single best KYC/AML provider. The right choice depends on your user geography, transaction volume, regulatory jurisdiction, and how much you need the provider to do versus what your platform handles internally. We have direct integration experience with all four major platforms and will recommend based on your specific profile, not familiarity.

Persona: modular, workflow-first#

Persona is built around visual workflow configuration. Its primary strength is composability: you assemble verification flows from modular components (document capture, selfie/liveness, database checks, custom data fields) and version-control those flows. That structure matters for platforms that need multiple onboarding paths (different flows for individual vs. business users, or different jurisdictions) where a single rigid integration would require significant custom logic to replicate. It is our default recommendation for US-market fintechs that want to own workflow logic without writing it from scratch.

Onfido (Entrust): AI-driven document and biometric checks#

Onfido's Atlas AI engine covers a wide range of global document types, which makes it useful when your user base is internationally diverse and coverage is the primary concern. It handles document authenticity checks and biometric verification well. Enterprise pricing typically runs approximately $65,000/year at scale, which matters for early-stage platforms still figuring out their volume.

Sumsub: full compliance stack for crypto and fintech#

Sumsub bundles KYC, business verification (KYB), AML transaction monitoring, and travel rule compliance into a single platform. It is the provider we reach for with crypto exchanges, Web3 platforms, and fintechs operating across multiple jurisdictions. Pricing starts at $1.35 per verification with a $149/month minimum. For platforms that need a full compliance stack rather than point solutions stitched together, Sumsub reduces integration surface area significantly.

Jumio: high-volume, fast onboarding#

Jumio is designed for scale: high-throughput identity verification with sub-second decision latency on document checks, covering over 5,000 document types across 200+ countries. The infrastructure is materially different from lower-volume alternatives, which matters for payment processors and financial platforms where onboarding latency at volume is a hard requirement.

how we select the right provider for your use case#

Our provider selection process starts with your regulatory requirements, not the provider catalog. We map your jurisdictions, applicable regulations (FinCEN, FCA, MiCA, DORA, state-level MSB requirements), user risk profile, and transaction volume before recommending a stack. In many cases the answer is a single provider. For platforms operating across multiple jurisdictions with different risk tiers, a hybrid architecture with different providers handling different check types is often the right approach.

We document the rationale for every configuration decision. When your compliance team is asked why a particular provider was selected, that answer should be in your system documentation, not in someone's memory.

what we build#

identity verification integration#

We integrate your chosen KYC provider's API into your onboarding flow: document capture, liveness checks, watchlist screening, and the result handling logic (pass, fail, manual review, retry). The data model captures the full verification record: evidence fields, decision rationale, and the pass/fail outcome, so the decision can be reconstructed at any future point.

risk-tiered onboarding flows#

Most regulated platforms need more than one onboarding path. A retail user, a business customer, and a high-value individual each have different due diligence requirements. We build the routing logic that assigns users to the correct verification tier based on your risk classification criteria, and configure each tier with the appropriate check depth.

transaction monitoring pipelines#

Once a user is onboarded, compliance does not stop. We build the event pipelines that capture transaction data, apply your rule set or scoring model, and surface alerts for review. This includes rule configuration (velocity, structuring, geographic risk, counterparty screening), alert management workflows, and the logging infrastructure required for regulatory reporting.

suspicious activity flagging and SAR workflow support#

When a transaction monitoring alert escalates, your compliance team needs a structured process to investigate and, where required, file a Suspicious Activity Report. We build the case management workflow: alert triage, evidence collection, escalation routing, and SAR documentation, to a standard that supports the filing process and creates a defensible record of the investigation.

audit trail and reporting infrastructure#

Every check, decision, escalation, and configuration change should be logged with enough detail to reconstruct the decision at any future point. We build audit trail infrastructure that records the underlying data behind each decision, with versioned workflow configurations so you can show what your compliance system looked like on any given date.

regulated environments we build for#

fintech and neobanks#

Neobanks typically operate under bank partner agreements that layer KYC/AML standards on top of direct regulatory requirements. We build for both: the compliance requirements your banking partner imposes and the scale demands your user volume creates.

crypto exchanges and Web3 platforms#

FATF Travel Rule obligations, MiCA requirements in Europe, and FinCEN enforcement in the US mean that crypto platforms need ongoing transaction monitoring, wallet screening, and demonstrable AML controls. A basic identity check at signup is not enough.

payment processors and marketplace platforms#

Payment platforms face KYC requirements at both the user level (payers and payees) and the business level (merchant onboarding). We build verification flows for both sides, including KYB, beneficial ownership checks, and the transaction monitoring required for platforms operating under money services business licenses.

lending and credit platforms#

Lending platforms carry compliance obligations beyond identity verification: adverse action requirements, credit decision audit trails, and in some cases state-specific data retention standards. We build for the full regulatory surface, onboarding and beyond.

how we engage#

scope and compliance mapping#

Before any code is written, we map your regulatory requirements to your current architecture and identify the gaps: jurisdiction coverage, applicable regulations, current state of any existing KYC/AML implementation, and the risk tiers your business needs to support. The output is a compliance scope document that drives all subsequent build decisions.

provider integration and workflow build#

We integrate your selected provider(s), build the onboarding flows, configure the rule sets, and wire up the data model. All configuration decisions are documented during build, not after. The build process includes periodic reviews with your compliance stakeholders to confirm the implementation matches regulatory intent, not the technical spec alone.

testing against real regulatory scenarios#

Before delivery, we test against realistic regulatory scenarios: edge cases in document verification, alert thresholds under simulated transaction patterns, manual review escalation paths, and audit trail reconstruction. We review against the questions a compliance examiner would ask, to find gaps before they become findings.

handoff with documentation your team can own#

We deliver with documentation built for handoff: system architecture docs, data flow diagrams, configuration references, compliance rationale, and runbooks covering alert triage, SAR workflow, and periodic review processes. Your team should be able to operate the system and hand that documentation to a regulator without our involvement.

FAQ#

How long does a KYC/AML integration typically take?

Three to eight weeks for a production ready system, depending on provider complexity, the number of onboarding tiers, and whether transaction monitoring is in scope. Projects that include both identity verification and a full transaction monitoring pipeline with SAR workflow support typically run toward the eight-week end. We scope each engagement during compliance mapping before committing to a timeline.

Which KYC provider is the best choice for a fintech startup?

It depends on your geography, regulatory requirements, and expected volume. Persona is the strongest default for US-market fintechs that want flexible, workflow-configurable onboarding. Sumsub is better suited for crypto-adjacent fintechs or those operating across multiple jurisdictions. Onfido is worth considering when international document coverage is the primary requirement. We do provider selection as part of the compliance mapping phase.

What is the difference between KYC and AML as technical systems?

KYC handles identity verification at onboarding: confirming who a user is before they access your platform. AML handles ongoing behavioral monitoring after identity is established, watching transaction patterns for indicators of financial crime and generating alerts when activity crosses risk thresholds. They require different architectures, and in most regulated platforms both are required.

Can KYC/AML compliance workflows be automated?

Yes, substantially. Document verification, database screening, risk scoring, and alert generation are all automatable. Manual review is still required for edge cases: document quality failures, partial matches, high-risk alert escalations. A well-built system minimizes the volume that reaches human review.

How much does it cost to build a KYC/AML integration?

$5,000-$40,000+ depending on provider, onboarding tier complexity, whether transaction monitoring is in scope, and your existing infrastructure. Provider costs are separate: Sumsub starts at $1.35 per verification with a $149/month minimum; Onfido enterprise pricing averages approximately $65,000/year at scale. We provide a fixed-scope estimate after the compliance mapping phase.

Does Silverthread Labs guarantee regulatory compliance?

No. We build compliance infrastructure to a professional standard and document every configuration decision. But compliance is an ongoing organizational commitment, not a property of software. What we deliver is a system that is well-designed, well-documented, and auditable. Your legal and compliance team retains responsibility for regulatory interpretation and ongoing oversight.

Do you handle ongoing maintenance after delivery?

Yes. Regulatory requirements change, provider APIs update, and risk rules need tuning as your platform matures. We offer ongoing support engagements after the initial build and can provide technical input during periodic compliance reviews.

work with us#

If you are building in a regulated environment and need a KYC/AML system that holds up under audit, contact Silverthread Labs to discuss your compliance scope.

We bring direct build experience across fintech, crypto, payments, and lending, along with the documentation practices that compliance teams need when regulators come asking. Tell us about your regulatory requirements and current architecture, and we will scope the work from there.

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• Self Hosted AI for Financial Services -- private, on-premises AI for compliance sensitive workflows
• Technical Audit -- assessment of an existing system against compliance and engineering standards