Analysis for

theirstack.com favicon theirstack.com

92
Flare Score
Safe

FlareAI™ Summary

TheirStack helps users identify companies based on their technology stack and hiring trends. Security indicators are positive: a valid SSL certificate issued by Let's Encrypt, a domain age of nearly five years, and a clean blacklist status across all listed sources. Google Safe Browsing reports a clean status, further bolstering trust. With a FlareScore of 92/100, TheirStack presents a safe browsing experience. Users can generally trust the site.

+15.1%
than category average
United States
Server Country
5 years
Domain Age

Score Breakdown

How we calculated the Flare Score based on positive and negative signals.

Positive Signals

Valid SSL certificate from Let's Encrypt
Established domain (2+ years old)
WHOIS information publicly available
Not found on any blacklist (1 sources checked)
Strong email security (SPF, DKIM, DMARC configured)
Privacy policy present
Modern security headers configured (HSTS, CSP)
Good website performance

Negative Signals

Pro Tip: A valid SSL certificate is a basic requirement for any trustworthy site, but it doesn't guarantee the site is not a scam.

SSL & Security

SSL certificate and security headers configuration

Security Score
100/100
✓ Valid SSL (40) ✓ HSTS (20) ✓ CSP (20) ✓ X-Frame (20)

SSL Certificate

Issuer
Let's Encrypt
Valid From
Nov 12, 2025
Valid Until
Feb 10, 2026
32 days remaining

Security Headers

HSTS
CSP
X-Frame-Options

Domain & WHOIS Information

Domain Age
5 years 0 months
Registered Dec 31, 2020
Very High Trust
Dec 2020 Expires Dec 2028
Established domain (5+ years) - High trust indicator
Registrar
Porkbun
Registration Date
Dec 31, 2020 (5 years ago)
Last Updated
Nov 04, 2025
Expiration Date
Dec 31, 2028 (1087 days remaining)
Server Location
United States
Abuse Contact
N/A

DNS Configuration

Domain Name System records and email security configuration

Email Security
SPF
DKIM
DMARC
Basic
1
A
5
MX
5
TXT
2
NS

HTTP Headers

Key server response headers for security analysis.

Security (3)
Content Security Policy
HSTS
Clickjacking Protection
Web Server
Vercel
Cache Policy
public, max-age=0, m...

IP Geolocation

Server location and network information

United States
United States
Walnut
IP Address
76.76.21.21
ISP / Hosting
Amazon.com, Inc.
Coordinates
34.0233, -117.8512
Country Code
US

Email Configuration

Email security and authentication records (SPF, DKIM, DMARC).

Performance Metrics

Website loading speed and performance analysis

85
Average
Load Time
0.15s
Excellent
Page Size
0.15MB
Optimized
Requests
125
Many
Overall
85/100
Performance score

Good performance, but there's room for optimization to improve loading speed.

Blacklist Check

Checking if this domain is listed on major security blacklists.

Google Safe Browsing
Safe

Discovered Subdomains

Publicly accessible subdomains associated with this domain.

www.theirstack.com
api.theirstack.com
media.theirstack.com
app.theirstack.com

Privacy & Trackers

1 Trackers Found
Privacy Policy
Google Tag Manager
General

These trackers may be used for analytics, advertising, or site functionality.

Website Screenshot

theirstack.com screenshot

In-Depth Analysis

Overview

TheirStack.com is a technology lookup and hiring signal platform. It allows users to find companies based on their technology stack or hiring trends. This information can be valuable for job seekers, recruiters, and sales professionals targeting specific companies.

Security Assessment

TheirStack.com demonstrates a strong security posture. The site utilizes a valid SSL certificate issued by Let's Encrypt, ensuring encrypted communication. The domain is almost five years old, indicating stability. Importantly, Google Safe Browsing reports the site as CLEAN, a significant positive trust signal. The site is hosted in the United States by Amazon.com, Inc., a reputable provider.

Trust Level

With a FlareScore of 92/100, TheirStack.com is considered safe to use. The high score reflects the valid SSL certificate, clean browsing status, and established domain age. While no website is completely without risk, the available data suggests a low probability of malicious activity.

Recommendations

While TheirStack.com appears safe, users should still practice good online habits. Always review the privacy policy to understand data usage. Be aware that the site uses trackers. Because the site has a payment system, use strong, unique passwords and monitor your account for any suspicious activity.

User Reviews and Complaints

Share your experience with this site or ask questions. Your comments help the community.

No reviews yet.