Spectra

About

Spectra normalises fonts, animations and scrollbars before it compares, so the only diffs you see are the ones you caused. Flaky screenshots stop paging you at 3am.

Where Spectra fits

Spectra sits in the testing corner of most stacks, and is aimed at teams who have outgrown doing this part by hand. It runs on Web and CLI, and is free to start with paid tiers for teams.

It is a closed-source product, so evaluate it the way you would any vendor you plan to build a workflow around.

What you get on day one

Deterministic rendering pipeline, and perceptual diffing, not pixel equality, review ui with accept-all-in-branch, playwright and cypress adapters. The setup is deliberately small: the maker's argument is that a tool you have to schedule a migration for is a tool you will not adopt.

Whether that holds for your team depends on what you already run. The listing below and the feedback from other makers are the fastest way to find out.

What it does

• Deterministic rendering pipeline
• Perceptual diffing, not pixel equality
• Review UI with accept-all-in-branch
• Playwright and Cypress adapters

• Mara Ellis @maraellis · 2d

  Been using this on a 40-table schema all week. The rollback generation alone saved me twice. One request: a dry-run flag that prints the SQL without touching anything.

• Devin Roy @droy · 3d

  The plain-language summaries are the killer feature. My non-technical PM can review migrations now, which I did not expect to ever type.

• Sana Qureshi @sanaq · 4d

  Works well with Postgres. MySQL support felt a bit behind, the enum diffing missed a case for me. Filed an issue and got a response the same day.