Fastspeed's tech stack
What does Fastspeed use?
Fastspeed (fastspeed.dk) uses at least 12 tools we can see from public records, including Dixa for customer support, Ahrefs for marketing, Microsoft Entra ID for sign-in and Mailchimp Transactional for email delivery. Last checked .
- Industry
- Internet
- Size
- 11–50 employees
- Based in
- København NV, Denmark
- Founded
- 2018
- Company page
- Tools found
- 12
- Categories
- 8
- Layers
- 3 of 5
- Last checked
- Nov 2026
Fastspeed's stack, layer by layer
Of 12 tools, 5 came from email records, 4 from DNS verification records, 2 from website code and 1 from other records. Each tool links to the other companies we've found using it. The label says what kind of public trace gave it away.
Application
3 tools, what the product is built with
Go-to-market
3 tools, how they find and keep customers
Marketing
Support & Docs
Company Ops
6 tools, what the team runs on day to day
Email Delivery
Workspace
Security & Compliance
Companies like Fastspeed also use
Tools common among companies with a similar stack that we haven't found at Fastspeed.
Companies with a stack like Fastspeed's
Ranked by shared tools, with rare tools counting more.
PrintlerInternet · 11–50 people5in common
PapersealPackaging and Containers · 11–50 people3in common
Greenbow A/sUtilities · 11–50 people4in common
Unisport A/Sunisport.pl4in common
Sidonas.lvsidonas.lv2in common
SkateProskatepro.dk4in common
smartphotosmartphoto.se2in common
Coffee CircleInternational Trade and Development · 51–200 people4in common
More Internet companies
Other Internet companies we've checked.
Fastspeed tech stack FAQ
What tools does Fastspeed use?
As of November 2026, runsonwhat has found 12 tools at Fastspeed (fastspeed.dk) in public records. Application: Anthropic, Microsoft Entra ID and SvelteKit. Go-to-market: Ahrefs and Dixa. Company Ops: Microsoft 365, SendGrid and Apple Business. Last checked November 4, 2026.
What email provider does Fastspeed use?
Fastspeed uses Microsoft 365 for email and office software, alongside Apple Business, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365 and a DNS verification record. Microsoft 365 is used by 729,236 companies runsonwhat tracks.
What does Fastspeed use for customer support?
Fastspeed uses Dixa for customer support and documentation, according to runsonwhat (November 2026). runsonwhat found Dixa through email records that authorize Dixa. Dixa is used by 296 companies runsonwhat tracks.
What marketing software does Fastspeed use?
Fastspeed uses Ahrefs for marketing, according to runsonwhat (November 2026). runsonwhat found Ahrefs through a DNS verification record for Ahrefs. Ahrefs is used by 24,273 companies runsonwhat tracks.
What does Fastspeed use for login and identity?
Fastspeed uses Microsoft Entra ID for sign-in and identity, according to runsonwhat (November 2026). runsonwhat found Microsoft Entra ID through a subdomain that points at Microsoft Entra ID. Microsoft Entra ID is used by 3,233 companies runsonwhat tracks.
Does Fastspeed use SendGrid?
Yes. runsonwhat found SendGrid at Fastspeed through email records that authorize SendGrid. SendGrid is a Email Delivery tool used by 199,348 companies runsonwhat tracks.
Does Fastspeed use AI tools?
Yes. runsonwhat has found Anthropic at Fastspeed; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Fastspeed may use more AI tools than these.
Which companies have a tech stack similar to Fastspeed's?
The companies with the stacks most like Fastspeed's are Printler, Paperseal, Greenbow and Unisport, according to runsonwhat (November 2026). Each shares 3 to 5 tools with Fastspeed, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.
How does runsonwhat know what Fastspeed uses?
runsonwhat reads public records only. Of the 12 tools at Fastspeed, 5 were found through email records, 4 through DNS records, 2 through code on fastspeed.dk 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 fastspeed.dk 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.