spack.io
Spack
Last scanned Aug 24, 2026, 1:21 PM
Overall score
Great
Summary
A flexible package manager supporting multiple versions, configurations, platforms, and compilers. This website uses Google Analytics hosted on Fastly behind Fastly CDN. SEO is excellent (95/100) and accessibility is good (85/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Multiple H1 headings found.
A flexible package manager supporting multiple versions, configurations, platforms, and compilers.
- United States
- Hosted on Fastly
Top issues to fix
6 issues found · 1 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
More than 20% of images are missing alt text
AccessibilityAdd alt attributes to the remaining images (use alt="" for purely decorative ones).
1 broken link on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
SEO
1 issue(s) found
Performance
205 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
A flexible package manager supporting multiple versions, configurations, platforms, and compilers.
Contact
Email, phone, and address published on this site's own pages.
- maintainers@spack.io
Meta tags
- Title
- Spack
- Description
- A flexible package manager supporting multiple versions, configurations, platforms, and compilers.
- Canonical
- https://spack.io/
- Language
- en-US
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX |
|
| TXT | — |
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- spack.io
- Valid from
- Aug 24, 2026
- Valid to
- Nov 22, 2026
- Days until expiry
- 89
- SAN domains
- spack.io, www.spack.io
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 2 · H2 10 · H3 1
Links
20 internal · 12 external · 1 broken
Images
2 total · 1 missing alt
Scripts / Styles
4 scripts · 2 stylesheets
JS / CSS size
122 KB · 69.1 KB
Page size
15.9 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Found
- URLs in sitemap
- 34
SEO issues
- Multiple H1 headings found
Accessibility issues
- More than 20% of images are missing alt text
Careers
This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.
Scan details
- Requested URL
- https://spack.io
- Final URL
- https://spack.io
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 205 ms
- HTML size
- 15.9 KB
- Redirect chain
- https://spack.io
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does spack.io use?
- spack.io is built with Google Analytics.
- Is spack.io secure (HTTPS)?
- Yes. spack.io uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Nov 22, 2026.
- Who hosts spack.io?
- spack.io is hosted on Fastly, behind Fastly CDN.
- What is spack.io's SEO score?
- spack.io scored 95/100 for SEO in the latest analysis (excellent).
- What is spack.io's overall website score?
- spack.io has an overall SiteGraph score of 89/100, combining SEO, performance, security, and accessibility.
- Is spack.io hiring?
- spack.io has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card