Feature checklists rarely decide anything. What decides it is the pricing metric, who has to write the tests, and which limitation you can live with.
Entry price
Quote on request
Quote onlyFree and open source
Open sourceWhat drives the bill
The metric that actually scales your invoice.
Enterprise quote-based pricing by data volume and connected databases.
The Seed library is open source and free; note that Snaplet wound down its hosted product, so treat this as a library rather than a service.
Free tier
Free trial.
Everything, self-hosted
Open source
MIT
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Established
Tonic.ai · since 2018
Emerging
Snaplet · since 2021
Strengths
Limitations
Best for
Organisations that currently copy production data into staging and know they should stop.
TypeScript teams that want each developer and CI run to start from a clean, coherent database.
All of these integrate with: PostgreSQL.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.