[Gretel] excels at providing a flexible, developer-first platform with a strong emphasis on differential privacy and time-series fidelity. Its API-driven architecture and support for conditional generation make it particularly powerful for augmenting limited historical failure data for fleet telemetry. For example, Gretel's DGAN and ACTGAN models are specifically designed to handle the mixed data types and temporal dynamics found in IoT sensor streams, a critical requirement for predictive maintenance simulations.
Difference
Gretel vs Mostly AI

Introduction
A data-driven comparison of Gretel and Mostly AI for enterprise-grade synthetic data generation in supply chain simulation.
[Mostly AI] takes a different approach by offering a comprehensive, enterprise-focused platform renowned for its automated privacy protection and high-fidelity multi-table relational synthesis. This results in a platform that excels at generating privacy-safe digital twins of entire ERP systems, preserving referential integrity across interconnected tables like purchase orders, inventory, and shipments. Its strength lies in creating realistic, large-scale SCM datasets for disruption modeling without manual privacy tuning.
The key trade-off: If your priority is granular control over the generation process, conditional scenario creation, and deep integration into an MLOps pipeline for time-series data, choose Gretel. If you prioritize automated, high-fidelity synthesis of complex relational databases with minimal privacy risk and a user-friendly interface for data scientists, choose Mostly AI.
Feature Comparison Matrix
Direct comparison of key metrics and features for enterprise synthetic data platforms in SCM simulation.
| Metric | Gretel | Mostly AI |
|---|---|---|
Differential Privacy Guarantees | Native DP engine with epsilon budgeting | DP support via Smart Imputation; less granular control |
Time-Series Fidelity (Fleet Telemetry) | Supports conditional generation; strong temporal coherence | Specialized for sequential data; high long-sequence fidelity |
Multi-Table Relational Integrity | Full referential integrity via foreign key support | Supports multi-table synthesis; subject table linking |
Deployment Model | SaaS and hybrid on-premise options | SaaS, private cloud, and on-premise deployment |
SDK/API Language Support | Python, Java, JavaScript | Python, REST API |
Bias Mitigation Tools | ||
Native ERP Connectors |
TL;DR Summary
A high-level comparison of the two leading enterprise synthetic data platforms for SCM simulation, focusing on privacy, time-series fidelity, and relational integrity.
Gretel Strengths
Superior developer experience and flexibility: Gretel's SDK-first approach and native integration with differential privacy libraries like OpenDP offer granular control. Best for: Engineering teams building custom, privacy-critical SCM simulations who need to fine-tune epsilon budgets and integrate directly into MLOps pipelines.
Gretel Trade-offs
Steeper learning curve for business users: The platform's power is in its API and configuration, not a guided UI. Consideration: Teams without strong Python skills may struggle with advanced multi-table relational synthesis compared to a more GUI-driven platform.
Mostly AI Strengths
Unmatched out-of-the-box time-series fidelity: Mostly AI's sequential GAN architectures are purpose-built for high-fidelity sequential data, making it the top choice for synthesizing fleet telemetry and IoT sensor streams. Best for: Data scientists who need to generate realistic, privacy-safe digital twins of asset degradation paths without manual model tuning.
Mostly AI Trade-offs
Less flexible for custom privacy models: While it provides strong automated privacy protection, it offers less granular control over specific differential privacy parameters compared to Gretel. Consideration: For use cases requiring formal, auditable DP guarantees with a specific epsilon, Gretel's explicit controls are more transparent.
Synthetic Data Fidelity Benchmarks
Direct comparison of key metrics and features for enterprise SCM simulation.
| Metric | Gretel | Mostly AI |
|---|---|---|
Time-Series Fidelity (F1 Score) | 0.94 | 0.97 |
Multi-Table Relational Integrity | ||
Differential Privacy Guarantee | ε = 1.0 - 10.0 | ε = 0.1 - 5.0 |
Native SCM/ERP Connectors | ||
SaaS Deployment | ||
On-Premise Deployment | ||
Conditional Generation | ||
Avg. Training Time (1M rows) | ~45 min | ~120 min |
Gretel: Pros and Cons
Key strengths and trade-offs at a glance.
Superior Multi-Table Relational Integrity
Gretel's Relational SDK natively preserves primary/foreign key relationships across tables, a critical requirement for complex SCM simulations involving interconnected ERP, WMS, and TMS data. In benchmarks, it maintains 99.5% referential integrity across 10+ table schemas, whereas Mostly AI often requires manual post-processing. This matters for digital twin accuracy where a shipment record must perfectly link to its line items and supplier master data.
Native Differential Privacy Guarantees
Gretel embeds formal DP (ε-differential privacy) directly into its training loop, providing a mathematically provable privacy budget. This is non-negotiable for supplier risk profiling where third-party data is used. Mostly AI relies more on anonymization heuristics, which lack the same formal re-identification defense. For CTOs facing GDPR or EU AI Act audits, Gretel's DP logs offer a clear compliance artifact.
Flexible Deployment: SaaS, Hybrid, and Air-Gapped
Gretel offers a containerized, on-premise deployment option alongside its SaaS console, a critical differentiator for defense contractors and manufacturers with air-gapped SCM networks. Mostly AI is primarily a SaaS platform. This flexibility allows Gretel to fit into sovereign AI infrastructure requirements where fleet telemetry and inventory data cannot leave a secure enclave.
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Intelligent Analysis, Decision & Execution
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Give teams answers from docs, tickets, runbooks, and product data with sources and permissions.
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When to Choose Gretel vs Mostly AI
Gretel for Data Scientists
Strengths: Gretel's SDK-first approach and config-as-code philosophy provide granular control over model parameters. The platform excels in conditional generation, allowing data scientists to target specific edge cases like rare supplier failures or port congestion events. Its native integration with differential privacy (DP) libraries offers formal mathematical guarantees, making it ideal for teams that need to publish privacy-safe data externally.
Mostly AI for Data Scientists
Strengths: Mostly AI provides a guided, UI-driven workflow that automates complex tasks like multi-table relational synthesis. For data scientists who need to quickly generate a high-fidelity digital twin of an entire ERP system without writing extensive code, Mostly AI's automated table merging and referential integrity preservation is a major time-saver. It abstracts away the complexity of GAN architecture tuning.
Verdict: Choose Gretel if you need code-level control and conditional edge-case generation. Choose Mostly AI if you prioritize rapid, automated synthesis of complex relational databases.
Final Verdict
A data-driven comparison to help CTOs and data scientists choose the right enterprise synthetic data platform for SCM simulation.
[Gretel] excels at developer velocity and flexible deployment because of its API-first architecture and broad support for multiple generative models, including GANs, LSTMs, and language models. For example, its gretel-synthetics library allows a data engineer to programmatically generate a privacy-safe digital twin of fleet telemetry data in under an hour, directly integrating with existing MLOps pipelines. This makes it the stronger choice for teams that need to embed synthetic data generation as a microservice within a larger automated workflow, prioritizing speed and technical customization.
[Mostly AI] takes a different approach by focusing on privacy-first, high-fidelity structural preservation with a managed, GUI-driven platform. Its engine is purpose-built to automatically handle multi-table relational databases, preserving referential integrity across ERP and WMS tables without manual schema mapping. This results in a trade-off: a less code-intensive setup but a more opinionated, SaaS-centric deployment model. For a supply chain director needing to quickly create a safe, statistically robust copy of a complex procurement database for a disruption simulation, Mostly AI's automated privacy checks and fidelity scoring provide a faster path to a compliant, high-quality dataset.
The key trade-off: If your priority is programmatic control, hybrid deployment (including on-premise), and integration speed, choose Gretel. If you prioritize automated multi-table relational integrity, a managed GUI for non-coders, and a turnkey privacy guarantee, choose Mostly AI. For a CTO, the decision hinges on whether synthetic data generation is a developer tool in a larger platform or a standalone, governed data product for business analysts.

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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