They do what they say on the tin. It's just that easy. If you're a small business owner, go get ignored by ADP for a couple of quarters (and pay them 2x Gusto's rates), send the late-filings notices to your increasingly-exasperated accountant, and bask in the warm indifference of a massive corporate behemoth who (thankfully, mistakenly) believes they're the only game in town. Then switch to Gusto, and try to describe to us how different it is, without glib hyperbole such as "...everything. And it's amazeballs!"