Resy is the default for most hard-to-book New York restaurants and a growing share of San Francisco. It runs a rolling window: one new date appears at the far edge of the calendar each day. Everything below is measured across the 72 Resy restaurants SnagRes watches, not taken from Resy's own documentation.
Resy Notify is the built-in waitlist. It covers one restaurant, one date and one party size at a time, and only Resy restaurants. That is worth using and worth knowing the limits of: it covers one platform, so if the table you want is on one of the other three it does not apply at all. SnagRes watches all four. How the alert services compare.
16 of the 72 Resy restaurants we track do not yet have a confirmed release schedule, and we would rather leave those blank than assume one. Everything here describes hard-to-book restaurants in two cities, which is not the same as describing Resy as a whole. How we measure this.