What Technology Does Circle Use?

28 technologies detected on circle.so

Circle uses 28 technologies on circle.so, including Next.js, Google Workspace, React. Origin infrastructure appears to be Vercel, with Cloudflare CDN and Cloudflare edge signals. Asset host signals include Cloudflare JS, Google Hosted Libraries. Infrastructure complexity: high.

Business modelmixed

SaaS score81/100 · likely saas

Complexityhigh

NetworkCloudflare, Inc. (AS13335)

Javascript Framework

Next.js

Confirmed · 95%

React

Confirmed · 90%

Email Infrastructure

Google Workspace

Confirmed · 90%

SendGrid

Probable · 65%

Hosting

Vercel

Confirmed · 88%

Customer Support

Zendesk

Confirmed · 88%

Security

Cloudflare

Confirmed · 86%

Cloudflare Bot Management

Probable · 70%

Javascript Library

jQuery

Probable · 70%

Possible Signals

angular

Weak · 60%

google_ads

Weak · 60%

hubspot

Weak · 60%

hubspot_marketing

Weak · 60%

Intercom

Weak · 58%

Marketo

Weak · 58%

d3_js

Weak · 50%

do_not_sell

Weak · 50%

google_analytics4

Weak · 50%

google_fonts

Weak · 50%

google_tag_manager

Weak · 50%

gsap

Weak · 50%

gstatic

Weak · 50%

hubspot_forms

Weak · 50%

intersection_observer

Weak · 50%

microsoft_clarity

Weak · 50%

soc2

Weak · 50%

Cloudflare Browser Insights

Weak · 40%

HSTS

Weak · 40%

Commercial Signals

✓ Pricing page

✓ Contact sales

✓ Docs / API docs

✓ Public API

✓ Careers page

✓ E-commerce

GTM Stack

✓ CRM

✓ Marketing automation

✓ Analytics

✓ Advertising

✓ Customer support tool

✗ Scheduling tool

✓ Email marketing

Site Signals

✓ Viewport Meta (mobile)

✓ Apple App Link (verified link)

✓ Google Play Store Link (verified link)

✓ Facebook Domain Verification (verification)

✓ Google Site Verification (verification)

✓ Zendesk Domain Verification (verification)

✓ Instagram (verified link)

✓ LinkedIn (verified link)

✓ Twitter/X (verified link)

Presence

✓ en html lang

✓ pt-br hreflang

✓ br locale path

✓ Apple app association

✓ Android asset links

✗ App Store link

✗ Google Play link

Infrastructure

Origin: Vercel
CDN: Cloudflare
Edge: Cloudflare
Asset hosts: Cloudflare JS, Google Hosted Libraries, Meta CDN
API endpoint: https://api.circle.so
Staging env: Detected
HSTS: Enabled · max-age 31536000 · includeSubDomains · preload
llms.txt: Present

Provider Signals

Cloudflare DNS dns

high · 95% nameserver records

Google Workspace email

high · 90% google mx or spf, google spf, mx records

Vercel origin

high · 90% vercel header or cname, vercel asset url

Cloudflare cdn

high · 86% cloudflare headers, cdn inference

Cloudflare edge

high · 86% cloudflare headers

HSTS IncludeSubDomains Preload security

high · 86% strict transport security header

Cloudflare, Inc. (AS13335) network

high · 85% asn lookup

HSTS security

medium · 80% strict transport security header

Cloudflare JS asset host

medium · 78% cloudflare asset url

DMARC security

medium · 78% dmarc record

SPF security

medium · 78% spf record

Facebook Domain Verification verification

medium · 78% facebook domain verification txt

Google Site Verification verification

medium · 78% google site verification txt

Zendesk Domain Verification verification

medium · 78% zendesk domain verification txt

Google Hosted Libraries asset host

medium · 74% google hosted libraries asset url

Meta CDN asset host

medium · 72% meta cdn asset url

HubSpot Email email

medium · 72% spf record

SendGrid email

medium · 72% spf record

Zendesk email

medium · 72% spf record

DKIM google security

medium · 72% dkim selector

DNS & Email

Nameservers: Cloudflare DNS
Email provider: Google Workspace
Email senders: Google Workspace, SendGrid, Zendesk, HubSpot Email
SPF: v=spf1 mx include:_spf.google.com include:sendgrid.net include:mail.zendesk.com include:9306053.spf04.hubspotemail.net include:spf.autopilothq.com ~all
DMARC policy: none
DKIM selectors: google
DKIM providers: Google Workspace

Verification & Apps

✓ Facebook Domain Verification

✓ Google Site Verification

✓ Zendesk Domain Verification

✓ Apple app association

✓ Android asset links

✗ App Store link

✗ Google Play link

Subdomains (42)

app.circle.so Application

dashboard.circle.so Admin dashboard

admin.circle.so Admin panel

support.circle.so Support system

docs.circle.so Documentation

status.circle.so Status page

blog.circle.so Blog platform

shop.circle.so E-commerce

checkout.circle.so E-commerce checkout

api.circle.so API endpoint

cdn.circle.so CDN

assets.circle.so Asset hosting

dev.circle.so Development environment

staging.circle.so Staging environment

mail.circle.so Email hosting

www.circle.so

portal.circle.so

platform.circle.so

product.circle.so

help.circle.so

news.circle.so

content.circle.so

store.circle.so

static.circle.so

media.circle.so

images.circle.so

img.circle.so

files.circle.so

sandbox.circle.so

go.circle.so

link.circle.so

track.circle.so

info.circle.so

send.circle.so

careers.circle.so

jobs.circle.so

community.circle.so

forum.circle.so

login.circle.so

sso.circle.so

marketing.circle.so

growth.circle.so

Global Presence

BRCO.NZCO.UKCOM.BRFRMXNOPLSOUS

Social

Detected by scanning circle.so — Last checked: June 2, 2026

What Technology Does Circle Use?

Javascript Framework

Email Infrastructure

Hosting

Customer Support

Security

Javascript Library

Possible Signals

Commercial Signals

GTM Stack

Site Signals

Presence

Infrastructure

Provider Signals

DNS & Email

Verification & Apps

Subdomains (42)

Global Presence

Social

More Companies