flagsmith.com
Flagsmith - Open Source Feature Flag Service
Last scanned Aug 5, 2026, 10:00 AM · 13 views
Overall score
Excellent
Summary
Flagsmith makes it easy to create and manage feature flags. This website uses Google Analytics behind Cloudflare CDN. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores excellent (95/100) and performance excellent (100/100). Top issue: robots.txt not found.
Flagsmith
Flagsmith makes it easy to create and manage feature flags. Roll out, segment, and optimise. Stay secure with on-premise and private cloud hosting.
- 4th Floor, 86-90 Paul Street, London, London, EC2A 4NE, UK
Top issues to fix
3 issues found
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
SEO
2 issue(s) found
Performance
589 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
+1 overall since Jul 26, 2026
- Overall
- 96
- SEO
- 90
- Security
- 95
- Performance
- 100
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
Flagsmith
Flagsmith makes it easy to create and manage feature flags. Roll out, segment, and optimise. Stay secure with on-premise and private cloud hosting.
Contact
Email, phone, and address published on this site's own pages.
- info@flagsmith.com
- Phone
- +
- Address
- 4th Floor, 86-90 Paul Street, London, London, EC2A 4NE, UK
Meta tags
- Title
- Flagsmith - Open Source Feature Flag Service
- Description
- Flagsmith makes it easy to create and manage feature flags. Roll out, segment, and optimise. Stay secure with on-premise and private cloud hosting.
- Canonical
- https://www.flagsmith.com
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- Cloudflare
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- www.flagsmith.com
- Valid from
- Jul 4, 2026
- Valid to
- Oct 2, 2026
- Days until expiry
- 57
- SAN domains
- www.flagsmith.com
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 1 · H2 6 · H3 13
Links
46 internal · 11 external · 0 broken
Images
85 total · 2 missing alt
Scripts / Styles
61 scripts · 1 stylesheets
JS / CSS size
896 KB · 19.2 KB
Page size
127 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://flagsmith.com
- Final URL
- https://www.flagsmith.com/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 587 ms
- HTML size
- 127 KB
- Redirect chain
- https://flagsmith.com → https://www.flagsmith.com/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does flagsmith.com use?
- flagsmith.com is built with jQuery, Google Analytics, Google Ads, TikTok Pixel.
- Is flagsmith.com secure (HTTPS)?
- Yes. flagsmith.com uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 2, 2026.
- Who hosts flagsmith.com?
- Hosting provider information for flagsmith.com is not available yet.
- What is flagsmith.com's SEO score?
- flagsmith.com scored 90/100 for SEO in the latest analysis (excellent).
- What is flagsmith.com's overall website score?
- flagsmith.com has an overall SiteGraph score of 96/100, combining SEO, performance, security, and accessibility.
- What company operates flagsmith.com?
- flagsmith.com is operated by Flagsmith. Flagsmith makes it easy to create and manage feature flags. Roll out, segment, and optimise. Stay secure with on-premise and private cloud hosting.
- Has flagsmith.com's score changed over time?
- flagsmith.com's overall score has improved by 1 point (from 95 to 96) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card