Since launching in 2021, sunday has rapidly become a key player in hospitality tech, partnering with over 3,000 restaurants and facilitating payments for more than 45 million diners in the last year alone. Here Marco Mendes, Co-founder of MJMK – the independent restaurant group behind acclaimed venues such as Lisboeta, KOL and Casa do Frango – shares how sunday is helping their venues deliver speed, simplicity and, above all, highly evolved hospitality.
How do you see sunday fitting into the broader shift happening in hospitality right now?
Hospitality is evolving. More and more guests demand efficiency, speed and transparency, and teams benefit from tools that make their difficult jobs easier. sunday fits into that equation. Our teams are able to do what they do best: connect, serve, host.
Some operators hesitate to introduce tech at the table. What would you say to them?
We get it—there’s always a fear that tech can take away from the restaurant experience . But in our case, we have often found it has removed friction—waiting for the bill, splitting payments, finding a terminal—and guests get what they want and our teams have time to focus on guest experience. The result is a smoother experience. The hospitality is still there and there is a value in the reduction of admin.
What’s been the biggest, unexpected benefit of using sunday?
The peace of mind! Knowing that the check-out is handled—smoothly, accurately, and without delays—means we can focus on quality of service and atmosphere. It’s one less thing for managers to chase, one less bottleneck in the guest journey. And when you multiply that across multiple sites, it’s a game-changer.
More concretely, what results have you seen since adopting sunday?
The reviews! We knew guests would appreciate the convenience, but we didn’t expect it to be that visible online.
In just six months, we’ve received over 3,000 five-star Google reviews, and a staggering 80% of them come from guests who paid with sunday.
It is now made so easy for guests to leave a review when they pay with sunday that now the – usually – vast silent majority of people who loved their experience share it as well online!
Let’s talk about tipping. Has sunday changed the way your guests show appreciation to the team?
Absolutely. With sunday, 25% of our guests leave a tip, and we’re seeing 50% more tips on average than before. That’s huge—not just for morale, but for retention. When teams are rewarded more fairly and more often, they’re more motivated. It’s one of the most meaningful shifts we’ve seen.
Data collection can be tricky in hospitality. How has sunday helped you better understand your guests?
It’s been transformative:
In six months, we’ve collected over 40,000 guest emails.
Not through pushy forms, but seamlessly—through the payment flow. That gives us real reach: we can talk to our guests directly, bring them back in, reward loyalty. It’s the foundation for better marketing, without lifting a finger.
If you had to summarise what sunday has done for your venues in one sentence…?
Faster checkouts, more guest data, and a measurable uplift across the board—it’s rare to find a tech tool that’s this frictionless, and this impactful.
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