From their marketing blurb:
"Enjoy Peace of Mind – When your identity management system is secure and reliable, everyone in the enterprise enjoys peace of mind. OneLogin truly values transparency and building trust [...]"
From their TOS:
"ONELOGIN DOES NOT WARRANT THAT THE SERVICE IS ERROR-FREE OR THAT OPERATION OF THE SERVICE WILL BE SECURE OR UNINTERRUPTED.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL ONELOGIN, ITS AFFILIATES, [...] BE LIABLE FOR (A) ANY INDIRECT, PUNITIVE, INCIDENTAL, SPECIAL, CONSEQUENTIAL OR EXEMPLARY DAMAGES, INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS OF PROFITS, GOODWILL, USE, DATA OR BUSINESS OR OTHER INTANGIBLE LOSSES, [...] UNDER NO CIRCUMSTANCES WILL ONELOGIN BE RESPONSIBLE FOR ANY DAMAGE, LOSS OR INJURY RESULTING FROM HACKING, TAMPERING OR OTHER UNAUTHORIZED ACCESS OR USE OF THE SERVICE OR YOUR ACCOUNT OR THE INFORMATION OR CONTENT CONTAINED THEREIN."
Pro tip: Read the Terms of Service before signing up to a service, especially when it's a security-critical one. If their own legal department doesn't trust the service, run. As fast as you can.