A11y Pulse catches roughly 30 to 50 percent of accessibility issues automatically. That number is on the homepage because it's the truth, and any vendor claiming materially higher coverage from automated scans alone is being optimistic. The remaining 50 to 70 percent need a human to walk through the site, ideally one using assistive technology.
BrowserStack provides the infrastructure for that human work in a way A11y Pulse doesn't, and pretending otherwise would be a disservice to anyone reading this page. Real NVDA, JAWS, VoiceOver, and TalkBack on real hardware that testers can drive remotely is a serious capability pure-axe scanners can't replicate.
Most mature accessibility programmes are a combination: an automated scanner that watches the live site, an optional CI gate that catches regressions before they merge, and a manual screen-reader audit at meaningful release points. We built A11y Pulse to be the always-on layer that sits alongside whatever tool you choose for the manual side.