Keep more members.
Run less admin.
GymStack is the operating platform for CrossFit and HYROX gyms. It spots who is going quiet, surfaces failed payments, and runs automations — with honest, optional AI when you add a model key.
Software that runs the gym with you.
Most gym software is a filing cabinet. GymStack watches your gym, tells you what needs you, and does something about it.
Optional AI when you are ready
Connect Anthropic or Vercel AI Gateway and GymStack generates morning briefings and answers questions from your gym’s own data. Without a key, the UI tells you what to configure — it never fakes a reply.
Every lead and member on one board
A trial that never converted and a member of six years are the same person to your gym, so they are the same record here. No dual-entry, no reconciling two systems that disagree.
Retention on autopilot
At-risk is measured against what each member actually committed to, not a flat threshold. A twice-a-week member having a normal week is not a crisis, and treating it as one is how gyms learn to ignore the alerts.
Built for how you actually train
Programming, benchmarks, class capacity and the floor screen. Not a generic booking tool with CrossFit painted on the side.
The whole gym, one login.
Replace the patchwork of a member app, a billing tool, a spreadsheet and a group text — with one system built for the way functional-fitness gyms actually run.
Command center
Revenue, check-ins, retention and what needs you — on one screen, from real data.
Leads → members → regulars
One board from first enquiry to first anniversary, with stalled leads surfaced automatically.
Routines that run themselves
Win-backs, payment recovery and welcome sequences, triggered the moment the thing happens.
Kiosk, display and programming
Check people in, run the TV, and publish the week — from the same login.
The gyms that survive are not the ones with the best programming. They are the ones that notice when somebody stops showing up.Why we built GymStack
Run your gym on one system.
Set it up in an afternoon. Bring your members across in a day.