Mostly AI excels at automated, high-fidelity synthesis of complex, multi-relational datasets because of its proprietary deep learning engine. For example, its platform consistently achieves high scores on statistical utility metrics like Train on Synthetic, Test on Real (TSTR) and Kolmogorov-Smirnov tests, making its outputs reliable for training accurate machine learning models in banking and insurance. This focus on end-to-end automation and robust referential integrity positions it as a strong choice for enterprises needing to scale synthetic data production across diverse use cases while maintaining compliance with regulations like GDPR.
Comparison
Mostly AI vs Hazy

Introduction
A head-to-head comparison of Mostly AI's automated enterprise engine and Hazy's financial services specialization for generating compliant synthetic data.
Hazy takes a different approach by specializing in synthetic data generation explicitly for the financial services sector. This strategy results in a platform finely tuned for financial data schemas, transaction patterns, and specific regulatory frameworks like Basel III and model risk management (MRM) guidelines. The trade-off is a potentially narrower scope outside its core domain, but within finance, it offers deep integrations and compliance features that address sector-specific privacy and utility challenges head-on.
The key trade-off: If your priority is a scalable, automated engine for high-quality multi-relational data across various regulated industries, choose Mostly AI. If you prioritize deep, native specialization for financial services data structures and regulations, choose Hazy. Your decision hinges on whether you need a broad-spectrum enterprise solution or a domain-specific expert. For a broader view of the synthetic data landscape, explore our comparisons of K2view vs Gretel and the fundamental choice between a Synthetic Data Platform vs Custom In-House Solution.
Mostly AI vs Hazy: Feature Comparison
Direct comparison of key metrics and features for synthetic data generation in regulated industries.
| Metric / Feature | Mostly AI | Hazy |
|---|---|---|
Primary Industry Focus | Cross-sector (Banking, Insurance, Healthcare) | Financial Services & Banking |
Core Synthesis Method | Proprietary Deep Learning (GAN/VAE hybrid) | Specialized GANs for financial data |
Multi-Relational Data Support | ||
Built-in Differential Privacy | ||
Automated Fidelity & Privacy Scoring | ||
Referential Integrity Enforcement | ||
Compliance Certifications (e.g., ISO 27001) | ||
Deployment Model | SaaS & On-Premises | SaaS |
TL;DR Summary
Key strengths and trade-offs at a glance for two leading synthetic data platforms in regulated finance.
Mostly AI's Key Strength
Superior data utility and automation: Its engine is optimized for statistical fidelity, often outperforming in benchmarks for maintaining column-wise distributions and correlations. Offers a fully managed, low-code platform, reducing the data science lift. Ideal for enterprises needing to rapidly scale synthetic data generation across multiple use cases.
Hazy's Key Strength
Deep financial domain expertise and control: Provides granular control over synthesis to adhere to financial regulations (e.g., Basel III) and includes features for simulating specific economic scenarios. Its models are designed for the sparsity and temporal patterns inherent in transaction data, offering high utility for time-series forecasting.
When to Choose Which Platform
Mostly AI for Banking & Finance
Verdict: The superior choice for high-stakes financial modeling and regulatory compliance. Strengths: Mostly AI excels in generating multi-relational datasets (e.g., customer-account-transaction) with strict referential integrity, which is non-negotiable for testing core banking systems. Its automated fidelity scoring provides defensible metrics for model risk management (MRM) under frameworks like SR 11-7 and Basel III. The platform's focus on high-quality, statistically identical data minimizes the risk of privacy violation sanctions. Considerations: Implementation may require more upfront configuration for complex financial schemas compared to simpler tools.
Hazy for Banking & Finance
Verdict: A strong specialist for specific financial data types, particularly transactional data. Strengths: Hazy is built with financial services in mind, offering optimized models for time-series and transactional data generation. It can be effective for creating synthetic market data or payment streams. Its architecture can sometimes offer faster generation for these specific formats. Considerations: May lack the breadth of multi-relational synthesis and the automated, comprehensive audit trails required for the most stringent enterprise compliance scenarios in 2026. For a deeper dive into financial data synthesis, see our guide on Synthetic Data for Banking vs Healthcare.
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Final Verdict
Choosing between Mostly AI and Hazy hinges on prioritizing automated, high-fidelity data utility versus specialized financial services compliance.
Mostly AI excels at automated, high-fidelity synthesis for complex, multi-relational datasets. Its core strength is delivering high data utility, measured by metrics like Train on Synthetic, Test on Real (TSTR) scores, which are critical for training accurate machine learning models. For example, its platform is designed to preserve referential integrity across linked tables—a necessity for testing enterprise banking applications. This makes it a powerful choice for organizations needing robust, general-purpose synthetic data that mirrors real-world statistical distributions while ensuring privacy.
Hazy takes a different approach by specializing in synthetic data generation explicitly for the financial services sector. This strategy results in a platform deeply attuned to regulations like Basel III and model risk management (MRM) frameworks. Its trade-off is a narrower, more focused feature set compared to broader platforms, but it offers tailored compliance assurances and data structures (e.g., for transaction sequences) that directly address auditor and regulator expectations in banking and fintech.
The key trade-off: If your priority is maximizing data utility and automation for complex, multi-table datasets across various regulated industries (banking, insurance, healthcare), choose Mostly AI. Its high-fidelity engine is ideal for AI training and application testing. If you prioritize specialized, compliance-by-design synthesis for financial services data with a focus on meeting specific financial regulatory scrutiny, choose Hazy. For a broader look at the synthetic data landscape, explore our comparisons of K2view vs Gretel and the debate between Open-Source SDG Libraries vs Commercial SDG Platforms.

About the author
Prasad Kumkar
CEO & MD, Inference Systems
Prasad Kumkar is the CEO & MD of Inference Systems and writes about AI systems architecture, LLM infrastructure, model serving, evaluation, and production deployment. Over 5+ years, he has worked across computer vision models, L5 autonomous vehicle systems, and LLM research, with a focus on taking complex AI ideas into real-world engineering systems.
His work and writing cover AI systems, large language models, AI agents, multimodal systems, autonomous systems, inference optimization, RAG, evaluation, and production AI engineering.
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