Neosync vs Snaplet Seed

Free and open source

Free and open source

The MIT-licensed code remains free to self-host. The paid cloud service no longer exists — neosync.dev is offline.

Free and MIT-licensed. Snaplet the company shut down in August 2024 and snaplet.dev no longer resolves; this is a community-held library, not a service.

Everything, self-hosted

Everything, self-hosted

Emerging

Nucleus Cloud (acquired by Grow Therapy) · since 2023

Emerging

Supabase community (formerly Snaplet) · since 2021

• Open source and self-hostable, so sensitive data never leaves your infrastructure.
• Preserves referential integrity across tables.
• The last release is feature-complete for common Postgres and MySQL anonymisation work.

• Schema-aware generation means the data actually inserts and the app actually works.
• Deterministic seeds make failing tests reproducible.
• Good TypeScript ergonomics with Prisma and Drizzle.

• Archived and unmaintained since August 2025 — no security patches, no new connectors, no support.
• The hosted cloud has been shut down, so self-hosting is the only option.
• Fewer database connectors than the incumbents.

• Effectively unmaintained: the last npm release (0.98.0) was July 2024 and the last commit to the default branch was August 2024, though the repo is not archived.
• PostgreSQL-centric.
• TypeScript ecosystem only.

Realistically, nobody starting fresh. Existing self-hosted users can keep running it, but plan a migration to Tonic or a maintained alternative.

TypeScript teams that want each developer and CI run to start from a clean, coherent database.