OnSinch was born out of real-life crew management experience. Nearly 20 years ago, while running Shameless, a crewing company based in Prague, we faced it all—messy shifts, no-shows, last-minute changes, and way too many spreadsheets.

So we built a tool to make managing it all easier. What started as an internal fix quickly evolved into a powerful platform now used by companies in 15+ countries, with 150,000+ staff onboard and over 12 million hours of scheduled work.

We're not just a software company. We’re a team of doers, problem-solvers, and former crew managers who know exactly what it takes to keep great events running smoothly behind the scenes. We turned OnSinch into the tool we wish we had from day one—and now it’s here to help you.

With OnSinch at its core, Shameless grew into one of Central Europe’s most trusted production staffing companies—supplying riggers, steelhands, and stage managers for global acts like Ed Sheeran, Billie Eilish, Muse, Arctic Monkeys, and Twenty One Pilots.

As more industries came calling—festivals, catering, hostessing, hospitality, and more—we made OnSinch fully customizable. Today, it powers everything from local events to world-class productions like Formula 1, the FIFA World Cup, UEFA Champions League, IIHF World Championship, and ESL—and we're just getting started.

Whether you're running a massive festival or managing day-to-day staffing, we built OnSinch to help you manage teams smarter, save time, and deliver inCREWdible events.

SHIFTS HAPPEN. OnSinch makes sure you're ready.