Short answer
HubSpot's KB: set up 2FA in your security settings and add a secondary method (SMS or an authenticator app). As of March 20, 2026, the HubSpot mobile app isn't available when setting up new 2FA methods; existing app setups still work.
1. In HubSpot
The relevant screen in my demo portal.
2. Worth knowing
A backup method saves a lockout when you change phones.
3. Related
2FA lockouts and approved methods.