Open Diffix vs Tonic Fabricate

Open Diffix is a free, open-source project for anonymizing structured data, available through APIs and self-hosted deployments on Linux, macOS, and Windows. Its SynDiffix Python package generates statistically accurate synthetic data with strong anonymity. It is aimed especially at descriptive analysis, including histograms, heatmaps, column correlations, counts, averages, and standard deviations. You can generate a separate synthetic table for each analytic task and distribute a blob from which others create tables after installing SynDiffix. The project says this approach can preserve anonymity across many column combinations, but blobs currently do not scale well beyond about 10 columns. SynDiffix installs with pip and requires Python 3.10 or later. It can also support machine learning, though the maker says ML use is somewhat less easy. For data containing multiple rows per protected entity, provide the entity identifier separately or anonymity may be compromised. Open Diffix also includes pg_diffix, a PostgreSQL extension for aggregate anonymized answers to a very limited SQL subset; development is paused.

Tonic Fabricate uses a conversational AI agent to create synthetic data for databases, APIs, and files. It targets product development, software testing, AI model training, reinforcement learning environments, and sales demos. Generated content can include relational records, JSON, PDFs, DOCX files, and emails, with domain details and relationships preserved. An optional Validation Agent reviews output and prompts refinements. Fabricate can create mock APIs from uploaded specifications and define workflows callable through an API; its MCP supports generation from compatible clients such as Claude and Cursor. Listed connections and formats include PostgreSQL, MySQL, Oracle, Databricks, Snowflake, SQL Server, MongoDB, Amazon S3, Avro, Iceberg, and Parquet. Free costs nothing and lists $5 in monthly credits; Plus costs $29 a month with $25 in credits. Enterprise has custom pricing and offers Tonic Cloud or self-hosting. Tonic says synthetic records can reduce exposure to real sensitive data and support GDPR and HIPAA compliance.