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News, tutorials, and deep dives on synthetic financial data

privacyfingerprintsynthesis

Privacy-Preserving Synthesis: From Fingerprint to Dataset

VynFi's fingerprint-to-synthesis pipeline extracts differentially private statistical summaries from real data, then generates synthetic datasets that match those summaries without ever seeing the original records. This post walks through the full pipeline.

VynFi TeamApril 18, 20268 min read
GNNAMLnetworksgraph

GNN-Generated Vendor Networks for AML Detection

VynFi 3.0 uses graph neural networks to generate realistic entity relationship graphs — vendor networks, correspondent banking chains, shell company structures — for AML model training. This post covers the GNN edge predictor architecture and criminal network simulation.

VynFi TeamApril 18, 20269 min read
SOXcompliancecontrolaudit

SOX Compliance Testing with Simulated Material Weaknesses

VynFi 3.0 can simulate SOX-relevant control failures — segregation of duties violations, unauthorized journal entries, IT access control breakdowns — and generate datasets that exhibit the downstream financial statement impact. This post walks through the simulation pipeline.

VynFi TeamApril 17, 20268 min read
stress testrecessionmacroscenario

Stress Testing with Causal DAGs: A 2008 Recession Replay

Walk through VynFi's recession_2008_replay scenario pack step by step: the causal DAG structure, calibrated macro parameters, intervention sequence, and how to compare baseline vs. stressed portfolios in Python.

VynFi TeamApril 17, 20269 min read
neuraldiffusionAIgeneration

Neural Diffusion for Tabular Financial Data

VynFi 3.0 adds a score-based diffusion model for tabular financial data generation. This post covers the architecture — score networks, denoising score matching, classifier-free guidance — and shows how hybrid mode combines neural and rule-based generation.

VynFi TeamApril 17, 202610 min read
adversarialfraudONNXML

Training Fraud Models with Adversarial Synthetic Data

VynFi 3.0's adversarial mode takes an ONNX model, probes its decision boundary, and generates targeted synthetic examples where the model is least confident. This post covers the full pipeline from model upload to augmented retraining.

VynFi TeamApril 16, 20269 min read
counterfactualsimulationcausal

Counterfactual Simulation: What Would Happen If...?

VynFi 3.0's counterfactual engine lets you define a causal DAG, inject interventions, and generate paired baseline/counterfactual datasets. This post walks through the structural causal model, do-calculus semantics, and a complete Python example.

VynFi TeamApril 16, 20269 min read
announcementv3.0simulation

Introducing VynFi 3.0: From Generation to Simulation

VynFi 3.0 moves beyond data generation into full scenario simulation. Three new pillars — counterfactual simulation, adversarial ML augmentation, and neural diffusion — transform how teams stress-test models, audit controls, and train AI.

VynFi TeamApril 16, 20267 min read
pm4pyprocess miningOCELintegrationPythonconformance

pm4py + VynFi: Process Mining on Synthetic OCEL Event Logs

Generate OCEL 2.0 event logs with VynFi, load them into pm4py, discover process models, check conformance, and detect bottlenecks — no ERP data extraction needed.

VynFi TeamApril 13, 20268 min read
Celonisprocess miningIBCintegrationERPSAP

Celonis + VynFi: Load Synthetic Process Mining Data via IBC

Generate Celonis IBC-compatible event logs with VynFi, import them into Celonis Process Mining, and run analysis — without extracting from your ERP.

VynFi TeamApril 13, 20267 min read
AMLfraud detectionstreamingSIEMreal-timePythoncompliance

Real-Time Fraud Pipelines: From Synthetic Labels to SIEM Alerts

Build a back-pressured fraud alerting pipeline that streams AML labels from VynFi, classifies typologies, and dispatches to Slack/PagerDuty/SIEM without overwhelming downstream rate limits.

VynFi TeamApril 13, 202611 min read
streamingETLParquetpandasdata engineeringPythonScale tier

Streaming TB-Scale Financial ETL to Parquet

Stream journal entries from VynFi's NDJSON endpoint, flatten header+lines into one row per line item, and write chunk-batched Parquet files — all without loading the full dataset into memory.

VynFi TeamApril 13, 20269 min read
auditBenfordanomaly detectionanalyticsPythonjournal entries

Journal Entry Forensics: Benford's Law, Anomaly Detection, and Pre-Built Analytics

Use VynFi's pre-built analytics API to validate Benford's Law conformity, inspect amount distributions, and assess process variant entropy — without computing anything client-side.

VynFi TeamApril 13, 202610 min read
process miningOCELpm4pyvariant analysisPythonmanufacturing

Process Mining on OCEL 2.0 Financial Event Logs

Generate OCEL-compliant event logs from synthetic P2P/O2C/manufacturing processes, reconstruct case traces from document references, and run variant analysis — all from a single VynFi job.

VynFi TeamApril 13, 202610 min read
auditP2PO2Cthree-way matchingdocument flowPython

Document Flow Traceability: P2P/O2C Three-Way Matching

Every payment should trace back through an invoice, a goods receipt, and a purchase order. Here is how to reconstruct, validate, and audit those document chains with VynFi and Python.

VynFi TeamApril 13, 20269 min read
SDKdeveloper experiencepandasv2.3.1Python

Cleaner SDK Output: Native Decimals, Flat Layout, and DataSynth 2.3.1

DataSynth 2.3.1 fixes three output bugs and delivers two ergonomic wins: native JSON numbers and flat document layout. Here is what changed and how to use it.

VynFi TeamApril 13, 20267 min read
AMLbankingmoney launderingfraud detectionv2.3synthetic identitysanctions

Multi-Party AML Networks, Cross-Layer Fraud Propagation, and 14 Typologies

DataSynth 2.3 rebuilds the banking module from the ground up: synthetic identity, trade-based ML, crypto integration, sanctions evasion, real-estate integration, Barabási-Albert network topology, Payment ↔ BankTransaction bridging, velocity features, device fingerprints. Here is what changes for AML model training.

VynFi TeamApril 12, 202612 min read
streamingAzure BlobSASscalearchitecturev2.3

Streaming TB-Scale Synthetic Datasets Without Disk Hell

Customers hit OOM kills and disk-full errors generating terabyte datasets. We rebuilt the output pipeline around Azure Blob, per-file SAS URLs, BYO storage, and rate-controlled NDJSON streaming — so a 1 TB job now ships end-to-end with zero buffering.

VynFi TeamApril 12, 20269 min read
fraud detectionmachine learningPythontutorialscikit-learn

Build a Fraud Detector in 30 Minutes with Python

Generate fully labeled fraud data, engineer features, train a RandomForest classifier, and compare it against rule-based audit analytics — all in one notebook session.

VynFi TeamApril 11, 202610 min read
auditdocument flowP2PO2Cthree-way matchingPython

Audit Trail Analytics: Tracing P2P and O2C Document Flows

Every payment should trace back through an invoice, a goods receipt, and a purchase order. Here is how to reconstruct, validate, and audit those document chains with Python.

VynFi TeamApril 11, 20269 min read
process miningOCELmanufacturingbottleneck detectionPython

Process Mining with Synthetic Manufacturing Data and OCEL 2.0

Before Six Sigma consultants spend months mapping your processes, let process mining show you where the bottlenecks are. Here is how to do it with VynFi's manufacturing event logs.

VynFi TeamApril 11, 20269 min read
ESGsustainabilityCSRDGRITCFDPythonanalytics

ESG Data Analytics: From Carbon Footprint to Materiality Matrix

CSRD is now mandatory for large EU companies. Here is how to generate and analyze a full ESG data package — 14 files across all three pillars — with VynFi and Python.

VynFi TeamApril 11, 202610 min read
AMLKYCcompliancebankingPythonfinancial crime

AML Compliance Testing with 697K Synthetic Banking Transactions

AML-labeled transaction data is the most expensive and legally restricted dataset in financial services. Here is how to build and test a complete compliance program without it.

VynFi TeamApril 11, 202610 min read
auditcompliancePCAOBSOC 2synthetic data

Synthetic Audit Data for PCAOB and SOC 2 Testing

Auditors need realistic test data to validate tools and train teams, but real client data is off limits. Here is how synthetic data solves the compliance testing problem.

VynFi TeamApril 10, 20269 min read
SAPERPtest datatutorialintegration

How to Generate SAP-Compatible Test Data with VynFi

SAP implementations need realistic test data but getting it is painful. VynFi generates journal entries, trial balances, and subledgers in SAP-importable formats.

VynFi TeamApril 10, 20268 min read
machine learningAItraining dataPythondata science

Building Financial AI Models? Here's Your Training Data Pipeline

Synthetic financial data beats anonymized real data for ML training. Benford compliance, balanced entries, ground-truth labels, and unlimited scale via API.

VynFi TeamApril 10, 202610 min read
announcementlaunchsynthetic data

Introducing VynFi: Synthetic Financial Data for Everyone

Today we are launching VynFi, a cloud-native API that generates realistic synthetic financial data at 100K+ rows per second. Here is why we built it and what you can do with it.

VynFi ResearchApril 9, 20266 min read
audittraininguse casesynthetic data

Why Synthetic Financial Data Matters for Audit Training

Audit teams train on flat, unrealistic data. Synthetic financial data changes that by providing configurable complexity, labeled anomalies, and unlimited scale.

VynFi ResearchApril 7, 20268 min read
tutorialquickstartgetting started

Getting Started with VynFi in 5 Minutes

A quick walkthrough: sign up, create an API key, generate your first dataset, and inspect the results. All in under 5 minutes.

VynFi ResearchApril 5, 20265 min read
researchauditground-truth

The Ground Truth Problem in Enterprise Audit Analytics

Why you cannot use production data to build audit knowledge systems. The inverse problem is computationally infeasible, systematic errors propagate undetected, and internal consistency does not imply correctness.

VynFi ResearchApril 9, 202610 min read
statisticsdata-qualitymethodology

How VynFi Generates Statistically Rigorous Financial Data

Inside the three-layer knowledge model, Benford compliance, copula-based dependencies, and calibration against 155 real-world datasets that power VynFi's generation engine.

VynFi ResearchApril 9, 20268 min read
fraud-detectionmachine-learningcompliance

130+ Fraud Scenarios: Building Better Fraud Detection Models

How VynFi generates labeled fraud training data with 130+ anomaly subtypes, multi-stage fraud schemes, and ground-truth labels across all five knowledge dimensions.

VynFi ResearchApril 9, 20269 min read
privacydifferential-privacydata-governance

Privacy-Preserving Data Sharing with Differential Privacy Fingerprints

How VynFi enables cross-firm analytics without data exposure using epsilon-differential privacy fingerprints that separate the privacy boundary from data generation.

VynFi ResearchApril 9, 20267 min read