Most people do not realize: OpenTable owns the Canadian market, but Resy and local apps often have better availability at trendy spots. The app you choose depends entirely on which restaurants you want and how far in advance you book.
OpenTable — the largest platform, ~3,500 Canadian restaurants. Strong in Toronto, Vancouver, Montreal. Integrates with your credit card for no-show fees. Interface is clunky but comprehensive.
Resy — smaller but premium-focused, ~800 Canadian restaurants. Much better UI. Popular with Michelin-starred and hip independent restaurants. Booking window varies wildly (some open 60 days out, some day-of only). Strong in major cities.
TheFork — European-owned, ~400 Canadian locations. Better international restaurant database. Offers discounts and loyalty rewards. Less adoption in Canada than the US.
Local Apps — Toronto has Bookshelf, Vancouver has some indie options. Montreal has higher adoption of local booking systems. Worth checking if you see a restaurant you like but it is not on OpenTable.
Pro tip: Most apps show 'No Availability' when tables exist but require calling the restaurant directly. If you see a restaurant you love with no slots, call them at 11 AM on the day you want — cancellations happen constantly and restaurants often hold phone-only tables to bypass app fees.