The club are close to agreeing a compensation package with Sage's current club RC Lens.
- Transfer Centre LIVE! | Crystal Palace news & transfers🦅
- Palace fixtures & scores | FREE Palace highlights▶️
- Choose the Sky Sports push notifications you want! 🔔
The Frenchman is set to sign a contract up until the summer of 2029 with the option of a further year.
Sage emerged as the preferred candidate after Andoni Iraola became Liverpool head coach.
Palace are looking for a head coach after Oliver Glasner chose not to renew his contract at Selhurst Park, which expires on June 30.
Analysis: Who is Pierre Sage?
Sky Sports' Sam Blitz:
Crystal Palace and Pierre Sage have something in common - they are in a trophy-winning mood.
The Eagles are on a run after winning multiple major trophies - the first pieces of silverware in their history - over the last 12 months. The FA Cup, Community Shield and Conference League won under former boss Oliver Glasner represent a golden era at the club.
Sage, meanwhile, is in a similar mood after a sensational season at Lens. He took the Ligue 1 club into a title race with European champions Paris Saint-Germain this season - and they were leading the way at the end of February.
But the main achievement produced by Sage this season was the Coupe de France victory, earning Lens the first ever trophy in their history.
Having also coached Lyon, Sage has a lot of history playing a back three - which is the system Glasner nailed down to a tee. At Lens, Sage also managed to create an attack-minded team despite not being the main protagonists on the pitch in terms of possession.
All this makes sense for Sage to be the man in charge of Glasner's golden period at Palace. Yes, he's never managed in the Premier League before. But neither had Glasner before he turned up in south London...
