Warframe will get Cross Play and Cross Save, actually in development : r/xboxone
Warframe Cross-Play is not Technically Feasible for the Time being
Warframe Developers Are Looking Into Crossplay
When is Warframe cross platform play coming to PlayStation and Nintendo Switch? - Gamepur
Warframe crossplay has officially launched on consoles & PC | Shacknews
State of Warframe Cross Save & Crossplay - Developer Comments & History - YouTube
Warframe Crossplay, Cross-Save & Mobile Version Announced
Warframe: Cross Platform Progression Guide
Warframe On Switch Just Got A Cross Platform Play Update | Nintendo Life
WARFRAME on Twitter: "At #TennoCon, we announced that Community Testing for Cross Play will begin soon! Tag one Tenno on another platform you can't wait to play with. https://t.co/KH4Yu0Tpe1" / Twitter
Heart of Deimos Warframe Expansion Now Available on PC, PS4 and XB1
Warframe Developers Are “Exploring Options” For Cross Platform Play