What's the best email signature management tool in 2026 for Office 365 and hybrid environments?

We’re evaluating tools to standardize email signatures in a Microsoft 365 in hybrid setups with on-prem Exchange still in place.
The goal is to have automated directory sync Azure AD and a hybrid, centralized control. The deployment model should avoid device-level installs or manual updates when branding changes.
We’re comparing WiseStamp, Exclaimer, and CodeTwo.
From experience, which platform scales best in Microsoft-heavy or hybrid environments without creating ongoing IT overhead?