What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

Back to Search

greenhouse.io

https://greenhouse.io· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

greenhouse.io

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

44.230.29.120

Server Location

🇺🇸 Portland, United States

ASN

AS16509

Organization

AWS EC2 (us-west-2)

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-1030.awsdns-00.org.ns-1915.awsdns-47.co.uk.ns-491.awsdns-61.com.ns-979.awsdns-58.net.

Performance

Page Speed

53 requests

Image Optimization

Lazy LoadWebPAVIFResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

Cloudflare

Technology Stack

10 Technologies Detected

Other

CSS Frameworks

Analytics

Libraries

Tag Managers

CDN

Marketing

SEO Analysis

B76/100

greenhouse.iogreenhouse.io

Greenhouse | Applicant tracking software & hiring platform

Greenhouse is more than your typical ATS recruiting software, powered by built-in AI recruiting tools to streamline sourcing, hiring and talent management.

Title Length58 chars

Recommended: 50-60 chars

Description Length155 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

3 rules

Sitemap reference found

Sponsored

Security Score

26%Critical

Interactive

HTTPS

WAF

74d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

29.01.2026

Valid Until

29.04.2026

Subject Alternative Names (1)

www.greenhouse.com

SHA-256 Fingerprint

C0:0C:2B:22:1B:67:5C:54:DE:BC:21:03:A4:21:FE:B8:59:5F:F8:69...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

34083

alt-svc

h3=":443"; ma=86400

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9cd908d8e9abc8d5-FRA

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

aspmx2.googlemail.com

alt2.aspmx.l.google.com

aspmx.l.google.com

aspmx3.googlemail.com

+1 more

Domain Information

greenhouse.io

Domain Age

13y 9m

Created

01.05.2012

Expires

01.05.2026

Last Updated

05.04.2025

Registrar

Gandi SAS

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

Untitled Serif + Untitled Sans

61/100

Readability

/30

40/40

19px · LH 1.70

Hierarchy

/20

18/25

3.68x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Untitled Serif

Serif70px

Body Font

Untitled Sans

Sans19px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

70px

38px

34px

19px

✅ Excellent readability: 19px body text is ideal for all devices.

✅ Optimal line spacing: 1.70 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.7x larger than body text.

✅ Good performance: Using 2 font families keeps load times fast.

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

⚠️ Risky: Text appears on background images without overlay protection.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Marketing Automation

MarketoEnterprise

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.prod.website-files.com(3)go.greenhouse.com(2)cdn.cookielaw.org(1)googletagmanager.com(1)cdn.intellimize.co(1)

Website Identity

greenhouse.io

13 years old

Gandi SAS📧 Google Workspace

Social Profiles

Facebook Instagram LinkedIn YouTube TikTok

Sponsored

Last analyzed: 14 Feb 2026 at 02:12

Historical Analysis & Change Tracking