What technology does concert.io use?

We did not detect any specific technologies for concert.io in the latest scan.

Is concert.io secure (HTTPS)?

Yes. concert.io uses TLS 1.3 with a certificate issued by GlobalSign nv-sa, valid until Dec 6, 2026.

Who hosts concert.io?

Hosting provider information for concert.io is not available yet.

What is concert.io's SEO score?

concert.io scored 75/100 for SEO in the latest analysis (fair).

What is concert.io's overall website score?

concert.io has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.

Has concert.io's score changed over time?

concert.io's overall score has declined by 3 points (from 91 to 88) since Jul 26, 2026.

concert.io

Concert.io

Last scanned Aug 2, 2026, 12:00 PM · 5 views

Overall score

Great

Summary

Concert by Vox Media is a publisher‑led marketplace with best-in-class creative formats. SEO is good (75/100) and accessibility is excellent (100/100). Security scores good (80/100) and performance excellent (100/100). Top issue: Multiple H1 headings found.

Concert by Vox Media is a publisher‑led marketplace with best-in-class creative formats. The safe and trusted way to advertise across the open web.

Top issues to fix

7 issues found · 1 high priority

Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Multiple H1 headings found
SEO
Keep a single H1 per page and demote the others to H2/H3.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEO
Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

+1 more issue — details in the sections below.

SEO

4 issue(s) found

100

Performance

11 ms

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

-3 overall since Jul 26, 2026

Overall: 88
SEO: 75
Security: 80
Performance: 100
Accessibility: 100

Organization

Company details published in this site's own structured data.

Concert by Vox Media is a publisher‑led marketplace with best-in-class creative formats. The safe and trusted way to advertise across the open web.

Contact

Email, phone, and address published on this site's own pages.

Email: advertising@concert.io

Meta tags

Title: Concert.io
Description: Concert by Vox Media is a publisher‑led marketplace with best-in-class creative formats. The safe and trusted way to advertise across the open web.
Canonical: https://concert.io/
Language: en
Charset: utf-8
Viewport: width=device-width
Robots meta: max-image-preview:large
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: —
CDN provider: Fastly
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: GlobalSign nv-sa
Subject: concert.io
Valid from: May 21, 2026
Valid to: Dec 6, 2026
Days until expiry: 126
SAN domains: concert.io, *.concert.io

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyMissing
X-Frame-OptionsMissing
X-Content-Type-OptionsEnabled
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 3 · H2 10 · H3 15

Links

6 internal · 8 external · 14 broken

Images

38 total · 0 missing alt

Scripts / Styles

9 scripts · 0 stylesheets

JS / CSS size

15.7 KB · 144 KB

Page size

269 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Multiple H1 headings found
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://concert.io
Final URL: https://concert.io
HTTP status: 200
HTTP version: HTTP/2
Response time: 6 ms
HTML size: 269 KB
Redirect chain: https://concert.io

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Frequently asked questions

What technology does concert.io use?: We did not detect any specific technologies for concert.io in the latest scan.
Is concert.io secure (HTTPS)?: Yes. concert.io uses TLS 1.3 with a certificate issued by GlobalSign nv-sa, valid until Dec 6, 2026.
Who hosts concert.io?: Hosting provider information for concert.io is not available yet.
What is concert.io's SEO score?: concert.io scored 75/100 for SEO in the latest analysis (fair).
What is concert.io's overall website score?: concert.io has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.
Has concert.io's score changed over time?: concert.io's overall score has declined by 3 points (from 91 to 88) since Jul 26, 2026.