Upfling's tech stack
What does Upfling use?
Upfling (upfling.host) uses at least 9 tools we can see from public records, including Fastmail for email and documents, Stripe for payments, Clerk for sign-in and Cloudflare for content delivery. Last checked .
- Tools found
- 9
- Categories
- 7
- Layers
- 4 of 5
- Last checked
- Oct 2026
Upfling'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
5 tools, what the product is built with
Go-to-market
1 tool, how they find and keep customers
Marketing
Company Ops
2 tools, what the team runs on day to day
Email Delivery
Workspace
Companies like Upfling also use
Tools common among companies with a similar stack that we haven't found at Upfling.
Companies with a stack like Upfling's
Ranked by shared tools, with rare tools counting more.
SiteGPTsitegpt.ai6in common
MarooFinance and Accounting · 1–10 people5in common
primitive.devInfrastructure As a Service · 1–10 people5in common
Magic Hour AI, Inc.Content · 1–10 people6in common
ScotiaSignalscotiasignal.ca4in common
GameTorchgametorch.app4in common
NextjournalSoftware · 11–50 people4in common
Channel Surferchannelsurfer.tv5in common
Upfling tech stack FAQ
What tools does Upfling use?
As of October 2026, runsonwhat has found 9 tools at Upfling (upfling.host) in public records. Edge & Hosting: Cloudflare. Application: Anthropic, Stripe and Clerk. Company Ops: Resend and Fastmail. Last checked October 20, 2026.
What email provider does Upfling use?
Upfling 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 1,138 companies runsonwhat tracks.
What payment provider does Upfling use?
Upfling uses Stripe for payments and billing, according to runsonwhat (October 2026). runsonwhat found Stripe through a DNS verification record for Stripe. Stripe is used by 27,977 companies runsonwhat tracks.
What does Upfling use for login and identity?
Upfling uses Clerk for sign-in and identity, according to runsonwhat (October 2026). runsonwhat found Clerk through Clerk code on upfling.host. Clerk is used by 1,229 companies runsonwhat tracks.
Does Upfling use Cloudflare?
Yes. runsonwhat found Cloudflare at Upfling through DNS records that point at Cloudflare and code on upfling.host. Cloudflare is a CDN & Edge tool used by 702,402 companies runsonwhat tracks.
Does Upfling use AI tools?
Yes. runsonwhat has found Anthropic and Smithery at Upfling; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Upfling may use more AI tools than these.
Which companies have a tech stack similar to Upfling's?
The companies with the stacks most like Upfling's are SiteGPT, Maroo, primitive.dev and Magic Hour AI, according to runsonwhat (October 2026). Each shares 5 to 6 tools with Upfling, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.
How does runsonwhat know what Upfling uses?
runsonwhat reads public records only. Of the 9 tools at Upfling, 5 were found through DNS records, 2 through email records, 1 through website configuration files and 1 through code on upfling.host. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and upfling.host 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.