Chris (mettle) uses Mettle's SkyBox Studio to add After Effects 3D text to 360 footage.
For 2D text onto 360 footage watch: vimeo.com/139958639
He uses SkyBox Extractor and SkyBox Viewer to do this. Extractor and Viewer are 2 of the 4 modules available in SkyBox Studio, 360/VR production tools for After Effects.
360 footage courtesy: visyon360.com