runsonwhat

Fastmail's tech stack

What does Fastmail use?

Fastmail (fastmail.com) uses at least 10 tools we can see from public records, including Cloudflare Pages for hosting, PostHog for analytics, web-vitals for monitoring and Workable for hiring and HR. Last checked .

Industry
Email
Size
11–50 employees
Based in
Melbourne, Australia
Founded
1999
LinkedIn
Company page
Re-check liveVisit fastmail.com
Tools found
10
Categories
6
Layers
3 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

2 tools, where the bytes are served from

Hosting & Cloud

CDN & Edge

Data & Observability

2 tools, what they measure and store

Monitoring

Analytics

Company Ops

6 tools, what the team runs on day to day

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?

We've found 10 tools at Fastmail (fastmail.com). Edge & Hosting: Cloudflare and Cloudflare Pages. Data & Observability: web-vitals and PostHog. Company Ops: Let's Encrypt, Sectigo and DigiCert. Last checked October 2, 2026.

What cloud does Fastmail run on?

Fastmail uses Cloudflare Pages for hosting. We found Cloudflare Pages through custom domain.

What analytics tools does Fastmail use?

Fastmail uses PostHog for analytics. We found PostHog through website code.

What does Fastmail use for hiring and HR?

Fastmail uses Workable for hiring and HR. We found Workable through website code.

Does Fastmail use Cloudflare?

Yes. We found Cloudflare at Fastmail through website code. Cloudflare is used by 147,753 companies we track.

How does runsonwhat know what Fastmail uses?

We read public traces only: Fastmail's DNS and email records, certificate logs, the code its website loads, and published subprocessor lists. A tool is listed only when a direct record backs it up. DNS is rechecked weekly and the website 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.