Chromatic offers component review and visual testing for teams reviewing component states after changes.
Component-state screenshots can be reviewed by a team.
When reviewing component states after changes, cover loading, empty, and error states.
Applitools offers visual testing and interface comparison for teams comparing interface differences across browsers.
Argos offers screenshot diffs and visual testing for teams checking whether a PR changes existing pages.
BrowserStack offers a real device and browser testing platform for teams reproducing a web issue on a specific phone.