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sei.io

The Blockchain for Trading | Sei

Last scanned Jul 27, 2026, 11:43 AM · 1 view

96

Overall score

Excellent

Summary

Sei is designed for the world's most demanding markets, trusted by the global firms, funds, and infrastructure providers that drive modern finance. This website uses Next.js hosted on AWS behind Vercel CDN. SEO is excellent (100/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance good (85/100).

Sei

Sei is designed for the world's most demanding markets, trusted by the global firms, funds, and infrastructure providers that drive modern finance.

United States
Hosted on AWS

No critical issues detected

This site passes every automated check we run. Nice work — see the full breakdown below.

100

SEO

0 issue(s) found

85

Performance

37 ms

100

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

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

Sei

Sei is designed for the world's most demanding markets, trusted by the global firms, funds, and infrastructure providers that drive modern finance.

Founded
Jan 1, 2022
X (Twitter)discord.comGitHubLinkedIn

Contact

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

Source: https://www.sei.io/contact

Meta tags

Title
The Blockchain for Trading | Sei
Description
Sei is designed for the world's most demanding markets, trusted by the global firms, funds, and infrastructure providers that drive modern finance
Canonical
https://www.sei.io
Language
en
Charset
utf-8
Viewport
width=device-width, initial-scale=1
Robots meta
index, follow
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
The Blockchain for Trading | Sei
og:description
Sei is designed for the world's most demanding markets, trusted by the global firms, funds, and infrastructure providers that drive modern finance
og:type
—
og:url
https://www.sei.io

Twitter Card

twitter:card
summary
twitter:title
The Blockchain for Trading | Sei
twitter:description
Sei is designed for the world's most demanding markets, trusted by the global firms, funds, and infrastructure providers that drive modern finance

Technologies

Detected frameworks, languages, and tools.

Next.js

Hosting & CDN

Hosting provider
AWS
CDN provider
Vercel
IP address
216.150.1.129
ASN
AS16509 (AMAZON-02 - Amazon.com, Inc., US)

DNS records

TypeValue
A
  • 216.150.1.129
  • 216.150.16.129
AAAA—
MX—
TXT—
NS—
CAA
  • 0 issue "sectigo.com"
  • 0 issue "pki.goog"
  • 0 issue "letsencrypt.org"
  • 0 issue "globalsign.com"
CNAME
  • 99b667ea93343c24.vercel-dns-016.com
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
www.sei.io
Valid from
Jun 26, 2026
Valid to
Sep 24, 2026
Days until expiry
59
SAN domains
www.sei.io

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyEnabled
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsEnabled
  • Referrer-PolicyEnabled
  • Permissions-PolicyEnabled

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 6 · H3 2

Links

2 internal · 32 external · 0 broken

Images

62 total · 0 missing alt

Scripts / Styles

44 scripts · 1 stylesheets

JS / CSS size

1.4 MB · 47.6 KB

Page size

216 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
1
sitemap.xml
Found
URLs in sitemap
3

SEO issues

No SEO issues detected.

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://sei.io
Final URL
https://www.sei.io/
HTTP status
200
HTTP version
HTTP/2
Response time
33 ms
HTML size
216 KB
Redirect chain
https://sei.io → https://www.sei.io/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does sei.io use?
sei.io is built with Next.js.
Is sei.io secure (HTTPS)?
Yes. sei.io uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 24, 2026.
Who hosts sei.io?
sei.io is hosted on AWS, behind Vercel CDN.
What is sei.io's SEO score?
sei.io scored 100/100 for SEO in the latest analysis (excellent).
What is sei.io's overall website score?
sei.io has an overall SiteGraph score of 96/100, combining SEO, performance, security, and accessibility.
What company operates sei.io?
sei.io is operated by Sei. Sei is designed for the world's most demanding markets, trusted by the global firms, funds, and infrastructure providers that drive modern finance.