ZEFR's tech stack
What does ZEFR use?
ZEFR (zefr.com) uses at least 31 tools we can see from public records, including Amazon Web Services for hosting, Google Workspace for email and documents, Zendesk for customer support and Google Analytics for analytics. Last checked .
“Zefr is helping power the age of responsible marketing by enabling transparent, content-level targeting and measurement across the walled garden platforms.”
- Based in
- Los Angeles, United States
- Company page
- Tools found
- 31
- Categories
- 18
- Oldest proven tool
- Oct 2017
- Changes seen
- 1
ZEFR'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
3 tools, where the bytes are served from
Application
6 tools, what the product is built with
Auth & Identity
Backend & Database
Media & UI
Data & Observability
4 tools, what they measure and store
Go-to-market
6 tools, how they find and keep customers
Website & CMS
Ads & Pixels
Support & Docs
Company Ops
12 tools, what the team runs on day to day
Email Delivery
Dev Tools
Security & Compliance
What changed at ZEFR
Companies like ZEFR also use
Tools common among companies with a similar stack that we haven't found at ZEFR.
Companies with a stack like ZEFR's
Ranked by shared tools, with rare tools counting more.
ExperianProfessional Services · 10,000+ people13in common
AccorHospitality · 10,000+ people13in common
Lululemon AthleticaRetail · 10,000+ people10in common
Vector LimitedEnergy · 1,001–5,000 people9in common
LTK Creatorrewardstyle.com13in common
Teladoc HealthHealthcare · 5,001–10,000 people10in common
Evelyn PartnersWealth Management · 1,001–5,000 people10in common
Imagine Learning LLCE-learning · 1,001–5,000 people17in common
ZEFR tech stack FAQ
What tools does ZEFR use?
As of October 2026, runsonwhat has found 31 tools at ZEFR (zefr.com) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Amazon Route 53. Application: Google Fonts, Anthropic and OpenAI. Data & Observability: Google Analytics, Pendo and CloudHealth. Go-to-market: Mailchimp, LinkedIn Insight Tag and Zendesk. Company Ops: Google Workspace, SendGrid and Apple Business. Last checked October 9, 2026.
What cloud does ZEFR run on?
ZEFR uses Amazon Web Services for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on zefr.com. Amazon Web Services is used by 144,730 companies runsonwhat tracks.
What email provider does ZEFR use?
ZEFR 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 zefr.com. Google Workspace is used by 396,631 companies runsonwhat tracks.
What does ZEFR use for customer support?
ZEFR uses Zendesk for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Zendesk through a subdomain that points at Zendesk. Zendesk is used by 40,813 companies runsonwhat tracks.
What analytics tools does ZEFR use?
ZEFR uses Google Analytics for analytics, alongside Pendo, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on zefr.com. Google Analytics is used by 849,890 companies runsonwhat tracks.
What is ZEFR's website built with?
ZEFR uses Medium for its website, according to runsonwhat (October 2026). runsonwhat found Medium through a subdomain that points at Medium. Medium is used by 32 companies runsonwhat tracks.
How long has ZEFR used Apigee?
ZEFR has used Apigee since at least October 2017, going by the first public certificate of the zefr.com subdomain that points at Apigee. Other long-running tools at ZEFR include Auth0 (since March 2019) and Drata (since May 2024).
Does ZEFR use Google Fonts?
Yes. runsonwhat found Google Fonts at ZEFR through Google Fonts code on zefr.com. Google Fonts is a Media & UI tool used by 789,486 companies runsonwhat tracks.
Does ZEFR use AI tools?
Yes. runsonwhat has found Anthropic and OpenAI at ZEFR; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so ZEFR may use more AI tools than these.
Has ZEFR changed tools recently?
Yes. On runsonwhat's rechecks, ZEFR started using Firebase (latest on October 9, 2026). A change counts only between two checks of zefr.com done the same way.
Which companies have a tech stack similar to ZEFR's?
The companies with the stacks most like ZEFR's are Experian, Accor, Lululemon Athletica and Vector, according to runsonwhat (October 2026). Each shares 9 to 13 tools with ZEFR, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.
How does runsonwhat know what ZEFR uses?
runsonwhat reads public records only. Of the 31 tools at ZEFR, 11 were found through DNS records, 8 through email records, 6 through code on zefr.com and 6 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and zefr.com 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.