Technologies / Email and communications / Fastmail
Companies using Fastmail
Fastmail is a paid email hosting service offering email, calendar, and contacts, with options for private email addresses and offline access. It is used by individuals and businesses to send, receive, organize, and manage email, calendars, and contacts across devices.
Summarized from fastmail.com on 8 Nov 2026.
Seen in12 subprocessor lists10 privacy policies
Companies using Fastmail
Subprocessor listPrivacy policyWebsiteJob postings
A company can count under more than one kind of evidence. Our coverage is partial, so this is not everyone using Fastmail.
Questions
How many companies use Fastmail?
15 companies in StrataDB's data have public evidence for Fastmail, and 12 of them name it in their own subprocessor list. Our coverage is partial, so the real number is higher.
Which companies use Fastmail?
AccountsPortal, Auth57 Labs, Auth57 Labs, draw.io and Healthchecks.io, and 10 more companies. Each one links to the evidence behind it.
How does StrataDB know a company uses Fastmail?
From four kinds of public evidence: subprocessor lists, privacy policies, website code and job postings. Each is kept apart with its source and the date we saw it. A company missing here means we found no evidence, not that it does not use them.
Build your list of Fastmail customers
See every company we hold evidence for, with its source, and get an alert when a company adds or drops Fastmail.
- Every company and vendor, with its public source
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