runsonwhat

Fly.io, Inc.'s tech stack

What does Fly.io, Inc. use?

Fly.io, Inc. (fly.io) uses at least 37 tools we can see from public records, including Amazon Web Services for hosting, Google Workspace for email and documents, HubSpot for sales and Intercom for customer support. Last checked .

“Fly.io is a global public cloud for running full-stack and AI applications. Customer workloads on Fly.io are hardware-isolated for security, and can scale horizontally and vertically.”

Industry
Cloud Hosting
Size
11–50 employees
Based in
San Francisco, United States
Founded
2017
LinkedIn
Company page
Re-check liveVisit fly.io
Tools found
37
Categories
18
Oldest proven tool
Jul 2020
Last checked
Oct 2026

Fly.io, Inc.'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

4 tools, where the bytes are served from

Hosting & Cloud

CDN & Edge

Application

6 tools, what the product is built with

Frontend

AI

Payments & Billing

Data & Observability

12 tools, what they measure and store

Monitoring

Analytics

Flags & Experiments

Data Pipeline

Go-to-market

8 tools, how they find and keep customers

Marketing

Ads & Pixels

Sales & CRM

Support & Docs

Company Ops

7 tools, what the team runs on day to day

Email Delivery

Workspace

Collaboration

People & HR

Security & Compliance

What changed at Fly.io, Inc.

Using since

Dates come from the first certificate of the subdomain that points at the tool.

  1. Discourse
  2. Mintlify

Companies like Fly.io, Inc. also use

Tools common among companies with a similar stack that we haven't found at Fly.io, Inc..

Companies with a stack like Fly.io, Inc.'s

Ranked by shared tools, with rare tools counting more.

Fly.io, Inc. tech stack FAQ

What tools does Fly.io use?

As of October 2026, runsonwhat has found 37 tools at Fly.io (fly.io) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and OVHcloud. Application: Tailwind CSS, Anthropic and OpenAI. Data & Observability: Google Analytics, Google Tag Manager and Sentry. Go-to-market: Google Ads, HubSpot and Intercom. Company Ops: Google Workspace, Apple Business and Mailgun. Last checked October 7, 2026.

What cloud does Fly.io run on?

Fly.io uses Amazon Web Services for hosting and cloud infrastructure, alongside OVHcloud and Heroku, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through Amazon Web Services on fly.io's subprocessor list. Amazon Web Services is used by 144,101 companies runsonwhat tracks.

What CRM does Fly.io use?

Fly.io uses HubSpot for its CRM, according to runsonwhat (October 2026). runsonwhat found HubSpot through HubSpot on fly.io's subprocessor list. HubSpot is used by 90,380 companies runsonwhat tracks.

What email provider does Fly.io use?

Fly.io uses Google Workspace for email and office software, alongside Apple Business, according to runsonwhat (October 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace and code on fly.io. Google Workspace is used by 393,427 companies runsonwhat tracks.

What does Fly.io use for customer support?

Fly.io uses Intercom for customer support and documentation, alongside Help Scout, Mintlify and Discourse, according to runsonwhat (October 2026). runsonwhat found Intercom through email records that authorize Intercom. Intercom is used by 8,053 companies runsonwhat tracks.

What payment provider does Fly.io use?

Fly.io uses Stripe for payments and billing, alongside Metronome, according to runsonwhat (October 2026). runsonwhat found Stripe through a DNS verification record for Stripe and code on fly.io. Stripe is used by 25,507 companies runsonwhat tracks.

How long has Fly.io used Discourse?

Fly.io has used Discourse since at least July 2020, going by the first public certificate of the fly.io subdomain that points at Discourse. Other long-running tools at Fly.io include Mintlify (since September 2026).

Does Fly.io use Cloudflare?

Yes. runsonwhat found Cloudflare at Fly.io through Cloudflare on fly.io's subprocessor list. Cloudflare is a CDN & Edge tool used by 684,190 companies runsonwhat tracks.

Does Fly.io use AI tools?

Yes. runsonwhat has found Anthropic and OpenAI at Fly.io; Anthropic, for example, through Anthropic on fly.io's subprocessor list. AI services called only from servers leave no public trace, so Fly.io may use more AI tools than these.

Which companies have a tech stack similar to Fly.io's?

The companies with the stacks most like Fly.io's are LaunchDarkly, Twilio, RevenueCat and ai-coustics, according to runsonwhat (October 2026). Each shares 12 to 16 tools with Fly.io, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

How does runsonwhat know what Fly.io uses?

runsonwhat reads public records only. Of the 37 tools at Fly.io, 18 were found through its own subprocessor list, 7 through code on fly.io, 5 through DNS records, 4 through email records, 2 through subdomains that point at the vendor and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and fly.io 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.