Microsoft Exchange Online vs Fastmail
Microsoft Exchange Online shows up at 13 of the 255 companies we track, Fastmail at 3. None have both.
Counts come from DNS, response headers, page source and public job posts; a tool named in a single job post is not counted. They show adoption among companies developers look up, not market share. There is no signed verdict for this pair yet.
Microsoft Exchange Online
13
companies (5% of those tracked)
Only Microsoft Exchange Online
13 companies
Usually paired with
Google Tag Manager (6), Zendesk (6), Salesforce (6), React (5), Stripe (5)