runsonwhat

Fastmail's tech stack

What does Fastmail use?

Fastmail (fastmail.help) uses at least 8 tools we can see from public records, including Fastmail for email and documents, Zendesk for customer support, Workable for hiring and HR and Cloudflare for content delivery. Last checked .

LinkedIn
Company page
Re-check liveVisit fastmail.help
Tools found
8
Categories
7
Layers
4 of 5
Last checked
Oct 2026

Fastmail's stack, layer by layer

Each tool links to the other companies we've found using it. The label says what kind of public trace gave it away.

Edge & Hosting

1 tool, where the bytes are served from

CDN & Edge

Application

2 tools, what the product is built with

Media & UI

Go-to-market

2 tools, how they find and keep customers

Marketing

Support & Docs

Company Ops

3 tools, what the team runs on day to day

Workspace

People & HR

Security & Compliance

Companies like Fastmail also use

Tools common among companies with a similar stack that we haven't found at Fastmail.

Companies with a stack like Fastmail's

Ranked by shared tools, with rare tools counting more.

Fastmail tech stack FAQ

What tools does Fastmail use?

As of October 2026, runsonwhat has found 8 tools at Fastmail (fastmail.help) in public records. Edge & Hosting: Cloudflare. Application: Google Fonts and Font Awesome. Go-to-market: Zendesk. Company Ops: Red Sift OnDMARC, Fastmail and Workable. Last checked October 22, 2026.

What email provider does Fastmail use?

Fastmail uses Fastmail for email and office software, according to runsonwhat (October 2026). runsonwhat found Fastmail through email records that authorize Fastmail. Fastmail is used by 1,163 companies runsonwhat tracks.

What does Fastmail use for customer support?

Fastmail uses Zendesk for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Zendesk through a subdomain that points at Zendesk and email records. Zendesk is used by 42,356 companies runsonwhat tracks.

What does Fastmail use for hiring and HR?

Fastmail uses Workable for hiring and HR, according to runsonwhat (October 2026). runsonwhat found Workable through Workable code on fastmail.help. Workable is used by 947 companies runsonwhat tracks.

Does Fastmail use Google Fonts?

Yes. runsonwhat found Google Fonts at Fastmail through Google Fonts code on fastmail.help. Google Fonts is a Media & UI tool used by 817,599 companies runsonwhat tracks.

Which companies have a tech stack similar to Fastmail's?

The companies with the stacks most like Fastmail's are Pobox is now part of Fastmail, Lawn Love, SuperMedic and XTM International, according to runsonwhat (October 2026). Each shares 4 to 4 tools with Fastmail, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

How does runsonwhat know what Fastmail uses?

runsonwhat reads public records only. Of the 8 tools at Fastmail, 4 were found through code on fastmail.help, 2 through email records, 1 through DNS records and 1 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and fastmail.help about monthly.

We read public traces only: DNS and email records, certificate logs, website code and published subprocessor lists. A tool is listed when a direct record backs it up, and dropped when a recheck no longer finds it. Is this your company? See how to opt out.