Productivity Review

Spark Mail

Deep Dive Analysis

Spark is an email client with smart inbox grouping and features for discussing emails inside a team.

Teams that share responsibility for an inbox but do not want a helpdesk.

"Good middle ground between a mail client and a shared inbox. Check the data handling if privacy matters."

Long-running note taking and web clipping.

AI email client built on Gmail.

Encrypted email from Switzerland.

Public API

Offers a documented API you can build against.

Mobile app

Has a native app for iOS or Android, not just a mobile website.

Yes

Open source / self-hostable

Source is open and the tool can be run on your own infrastructure.

SSO (SAML)

Supports SAML single sign-on on at least one plan.

These are facts that can be checked, not opinions. Where we have not checked, it says so — we do not fill the gap with a guess.