Datto RMM and NinjaOne are both listed under RMM and patching. Datto RMM was founded in 2007; NinjaOne in 2013.
Datto RMM Kaseya's cloud RMM, built to pair with Autotask PSA and Datto BCDR. No prices reported yet.
NinjaOne Cloud RMM for patching, scripting and remote control from one lightweight agent. No prices reported yet.