# Sentinel Ledger

> Sentinel Ledger is a MiCA compliance software development firm based in Amsterdam, Netherlands, that builds AML transaction monitoring software, Travel Rule messaging systems and wallet screening engines for crypto-asset service providers (CASPs) authorised under EU Regulation 2023/1114. Founded in 2020, Sentinel Ledger has delivered 28 AML/monitoring software deployments and screens 2.1 billion transactions per month across all client systems.

Canonical: https://mica-compliance.online/
Last updated: 2026-06-20
Language: en-NL

## Quick facts

- Company: Sentinel Ledger B.V., Amsterdam, Netherlands
- Legal: KvK 78451203 · VAT NL862531908B01 · Amsterdam District Court
- Founded: 2020 (5 years operating)
- Team: 56 engineers and compliance specialists
- Niche: MiCA compliance software — AML transaction monitoring, Travel Rule, wallet screening
- Deployments: 28 AML/monitoring software projects completed
- Scale: 2.1 billion transactions screened per month across all deployments
- Track record: 0 enforcement actions across all Sentinel Ledger clients
- Analytics integrations: 11 (Chainalysis, Elliptic, TRM Labs and others)
- Certifications: ISO 27001 (NL-27001-9920, DNV) · SOC 2 Type II · ISO 27701
- Ratings: Clutch 4.9/5 (51 reviews) · G2 4.8/5 (33 reviews)
- Pricing: Monitor EUR 32k · Travel Rule EUR 58k · Managed EUR 12k/month
- Contact: hello@mica-compliance.online · +31 20 240 7733

## What Sentinel Ledger builds

[Services](#services)

Sentinel Ledger develops three core software products for CASP MiCA compliance:

- **TransactIQ Monitor**: Real-time AML transaction monitoring engine with configurable rule sets, cross-chain graph traversal and alert triage dashboard. Integrates with Chainalysis, Elliptic and TRM Labs.
- **TravelSync Protocol**: Travel Rule messaging software implementing IVMS101 message format across Notabene, OpenVASP and TRP. Handles counterparty VASP lookup and transfer-status tracking.
- **ScreenShield**: Wallet screening and PEP/sanctions scoring engine covering UN Consolidated List, OFAC SDN, EU Consolidated Sanctions and HM Treasury lists.

## Technology stack

[Tech stack](#tech-stack)

- Blockchain analytics: Chainalysis, Elliptic, TRM Labs, Scorechain
- Travel Rule protocols: Notabene, OpenVASP, TRP
- Message format: IVMS101
- KYC/KYB: Onfido, Sumsub, Jumio
- Screening databases: UN, OFAC, EU, HMT
- Monitoring infrastructure: Apache Kafka, ClickHouse, Elasticsearch, Redis
- API layer: REST + gRPC, OpenAPI 3.1
- Infrastructure: Kubernetes, Terraform, ISO 27001-certified data centres, Amsterdam

## Compliance & certifications

[Compliance](#compliance)

- ISO 27001 certified: NL-27001-9920, issued by DNV (Det Norske Veritas)
- SOC 2 Type II (annual audit)
- ISO 27701 (privacy information management)
- 0 enforcement actions across all CASP clients since 2020
- Regulatory frameworks covered: MiCA Regulation (EU) 2023/1114, EU AMLR, DORA Regulation (EU) 2022/2554, FATF Travel Rule, Transfer of Funds Regulation

## Case studies

[Case studies](#case-studies)

- **VaultEx Netherlands** (Dutch CEX, Q3 2023): AML transaction monitoring across 14 blockchains. False-positive alerts reduced by 68% within 90 days.
- **PayEuropa** (pan-EU payment platform, Q1 2024): Travel Rule IVMS101 integration via Notabene and OpenVASP for 100% of outbound transfers above EUR 1,000.
- **DeltaOTC Amsterdam** (OTC desk, Q2 2022): Wallet screening across 11 analytics providers. 0 enforcement actions in 24 months post-deployment.

## Pricing

[Pricing](#pricing)

- Monitor Edition: EUR 32,000 (fixed-scope TransactIQ Monitor build, 8-12 weeks)
- Travel Rule Edition: EUR 58,000 (TravelSync + ScreenShield, 10-16 weeks)
- Managed Compliance: EUR 12,000/month (ongoing monitoring, tuning, reports, regulator liaison)
- Free scoping workshop (2 hours, no obligation)
- Fixed-price discovery sprint: EUR 8,000 (4 weeks, deducted from build if engaged)

## Founder

[Founder](#founder)

Dr. Joost van Dijk, PhD — Founder and CTO. PhD in Applied Cryptography from TU Delft (2013). Former analyst at FIU-Netherlands (2013-2019). Research specialism: real-time AML transaction monitoring and Travel Rule messaging. LinkedIn: https://www.linkedin.com/in/joost-van-dijk-sentinel-ledger

## Research

[Research](#research)

SL-RN-2025-04: "False Positive Reduction in Blockchain AML: A Quantitative Study of Rule-Engine Configurations Across 2.1B Monthly Transactions" (2025). Analysis of 28 CASP deployments found dynamic threshold calibration reduced false-positive rates by 61% vs static rules; cross-chain graph traversal caught 94% of structuring patterns missed by single-chain monitors.

## Frequently asked questions

[FAQ](#faq)

**What is MiCA compliance software?** MiCA compliance software refers to purpose-built technical systems that help crypto-asset service providers meet their obligations under EU Regulation 2023/1114, including AML transaction monitoring, Travel Rule messaging, wallet screening, sanctions checks, KYC/KYB and regulatory reporting.

**What is the Travel Rule under MiCA?** The Travel Rule under MiCA (implemented via the Transfer of Funds Regulation) requires CASPs to transmit originator and beneficiary information alongside every crypto transfer above EUR 1,000. Sentinel Ledger's TravelSync Protocol implements this via IVMS101-compliant messaging across Notabene, OpenVASP and TRP.

**How much does MiCA compliance software cost?** Sentinel Ledger's Monitor Edition starts at EUR 32,000 fixed-scope. Travel Rule Edition is EUR 58,000. Managed Compliance is EUR 12,000 per month. Costs vary by number of chains, analytics integrations required and jurisdictional scope.

**How do I choose a MiCA AML software vendor?** Verify production blockchain analytics integrations (not demos), confirm Travel Rule coverage across your counterparty VASP universe, ask how false-positive rates are managed post-go-live, confirm the rule engine is auditable by your regulator, and check the vendor holds ISO 27001 with an evidence package for your authorisation dossier.

## Contact

[Contact](#contact)

Sentinel Ledger B.V.
Herengracht 182, 1016 BR Amsterdam, Netherlands
Phone: +31 20 240 7733
Email: hello@mica-compliance.online
KvK 78451203 · VAT NL862531908B01

## Glossary

[Glossary](#glossary)

- **MiCA**: Markets in Crypto-Assets Regulation (EU) 2023/1114 — the EU framework for crypto-asset service providers and issuers.
- **CASP**: Crypto-Asset Service Provider — an entity authorised under MiCA.
- **AML**: Anti-money laundering — detection and reporting obligations for CASPs.
- **KYC**: Know Your Customer — identity verification for CASP clients.
- **Travel Rule**: FATF requirement (MiCA Article 83 / Transfer of Funds Regulation) for CASPs to exchange originator/beneficiary data on crypto transfers.
- **IVMS101**: InterVASP Messaging Standard 101 — JSON schema for Travel Rule data.
- **STOR**: Suspicious Transaction and Order Report — MiCA Article 92 filing.
- **Sanctions screening**: Checking counterparties against UN, OFAC, EU and national sanctions lists.
- **Transaction monitoring**: Automated analysis of crypto transfers for financial crime patterns.
- **DORA**: Digital Operational Resilience Act (EU) 2022/2554 — ICT risk and resilience for financial entities including CASPs.