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4-star wellness hotel · Brussels

30,000+ guest messages in 2026, fewer than 1 in 25 typed by the team

MIX is a 180-room wellness hotel in the former Royale Belge headquarters in Brussels, with a club, two restaurants and a rooftop bar under the same roof. In 2026 it sent more than 30,000 messages to its guests, and the team typed fewer than one in 25 of them.

Rooms
180
Location
Watermael-Boitsfort, Brussels
Live since
2026
MIX Brussels
The result30,000+Guest messages sent in 2026
30,000+
Guest messages sent in 2026
90%+
Of replies written by the AI
<10s
Median time to an answer
€9,000+
Extras sold through AskWhisper in 2026

A hotel inside a wellness club

MIX isn't a hotel with a spa. It's a gym and wellness club of up to 5,500 m² with 180 rooms, two restaurants, a rooftop bar and a food market, in the former Royale Belge headquarters in green Watermael-Boitsfort. On a Saturday the same building serves overnight guests, club members, brunch tables and spa visitors, and every one of them has a question.

So every guest who books a stay gets a WhatsApp message matched to what they booked. The Pampering package, the Restore package, the All-in, a rate with parking and a family with children each get their own welcome. When MIX runs something special, a curated weekend or a members' party, the guests staying those nights hear about it before they arrive. And when they write back, the answer comes in under 10 seconds, at any hour.

In 2026 that added up to 4,500+ conversations and 30,000+ messages, and the team typed fewer than one in 25 of them.

What guests buy says a lot about the place. Late check-out brings in more than half of all extras revenue, most of it with wellness access included. Breakfast is about a fifth, early check-in around one euro in seven, and club access, morning yoga and bike rental make up the rest. At a wellness hotel, the last hours of a stay are the easiest thing to sell.

MIX Brussels

What they switched on

Journeys tailored per package and per event date, AI replies on WhatsApp, webchat and email, and extras offered before and during the stay. All of it lands in one inbox.

The traveller journey, from discovery through to post-stay
  1. Discovery
  2. Booking (this part)
  3. Pre-arrival (this part)
  4. In-stay (this part)
  5. Post-stay

The numbers, in full

From AskWhisper's platform data for MIX, 1 January to 13 October 2026. Every figure is rounded down.

  • 30,000+

    Guest messages sent in 2026

    Over half are journey messages that go out on their own, matched to what the guest booked. Around four in ten are AI replies. Fewer than one in 25 were typed by someone on the team.

  • 90%+

    Of replies written by the AI

    More than 12,000 AI replies against about 1,100 from the team, January to mid-October. The ones that reached a person were the ones that needed one.

  • <10s

    Median time to an answer

    At any hour. When a person replies, the median is over an hour and a half, which is why it matters that nine replies in ten don't need one.

  • €9,000+

    Extras sold through AskWhisper in 2026

    300+ extras booked before and during the stay. Late check-out with wellness access is the best seller on its own, at €3,500+.

Questions about MIX Brussels

How much of a big hotel's guest messaging can AI handle?

At MIX Brussels, a 180-room wellness hotel, the AI wrote 9 in 10 replies to guests in 2026. Of more than 30,000 messages sent between January and mid-October, the team typed fewer than 1 in 25. Scheduled journey messages and AI replies on WhatsApp covered the rest, with a median answer under 10 seconds.

Can a hotel send different messages to guests on different packages?

Yes. MIX Brussels sends every guest a WhatsApp welcome matched to what they booked: the Pampering, Restore and All-in packages, rates with parking and family stays with children each get their own message. Guests staying on event dates, such as a curated weekend or a members' party, also hear about it before they arrive.

What extras sell best at a wellness hotel?

Late check-out sells best at MIX Brussels, bringing in more than half of the €9,000+ in extras sold through AskWhisper in 2026, most of it with wellness access included. Breakfast makes up about a fifth of that revenue and early check-in around one euro in seven. Club access, morning yoga and bike rental make up the rest.

How fast do guests at MIX Brussels get an answer?

Guests at MIX Brussels get an answer in a median of under 10 seconds, at any hour, because the AI replies first on WhatsApp, webchat and email. When a message needs a person, the median staff reply in 2026 was over an hour and a half, which is why the AI handling 9 replies in 10 matters.

Sounds like your hotel?

  • 150+ rooms, with a spa, club or restaurants that also serve people who aren't staying the night
  • Packages with different inclusions, where each guest needs to hear something different
  • An events calendar that changes week to week
  • Extras that sell best when the guest is already relaxed: more time, more wellness, breakfast

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MIX is a 180-room wellness hotel in the former Royale Belge headquarters in Brussels, with a club, two restaurants and a rooftop bar under the same roof. In 2026 it sent more than 30,000 messages to its guests, and the team typed fewer than one in 25 of them.