What technology does fi.co use?

fi.co is built with Ruby on Rails.

Is fi.co secure (HTTPS)?

Yes. fi.co uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 11, 2026.

Hosting provider information for fi.co is not available yet.

What is fi.co's SEO score?

fi.co scored 80/100 for SEO in the latest analysis (great).

What is fi.co's overall website score?

fi.co has an overall SiteGraph score of 89/100, combining SEO, performance, security, and accessibility.

fi.co

The Future of the Founder Institute: A Letter from Adeo Ressi

Last scanned Jul 26, 2026, 4:17 PM · 1 view

Overall score

Great

Summary

FI is becoming the world's largest AI-native company builder. This website uses Ruby on Rails. SEO is good (80/100) and accessibility is good (85/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.

Founder Institute

FI is becoming the world's largest AI-native company builder. Adeo Ressi on the five big changes: simplified curriculum, personalized sprints, built-in agents, and early funding at scale.

Top issues to fix

8 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.
2 cookies without Secure/HttpOnly flags
Security
Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
Title longer than 60 characters
SEO
Shorten the title to under 60 characters so search results don't truncate it.
Meta description longer than 160 characters
SEO
Trim the meta description to under 160 characters to avoid truncation in search 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.

+2 more issues — details in the sections below.

SEO

4 issue(s) found

100

Performance

648 ms

Security

HTTPS & header checks

Accessibility

1 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.

Founder Institute

FI is becoming the world's largest AI-native company builder. Adeo Ressi on the five big changes: simplified curriculum, personalized sprints, built-in agents, and early funding at scale.

Facebook X (Twitter)plus.google.com LinkedIn Instagram YouTube soundcloud.com

Meta tags

Title: The Future of the Founder Institute: A Letter from Adeo Ressi
Description: FI is becoming the world's largest AI-native company builder. Adeo Ressi on the five big changes: simplified curriculum, personalized sprints, built-in agents, and early funding at scale.
Canonical: https://fi.co/
Language: en
Charset: UTF-8
Viewport: width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no
Robots meta
Manifest: https://fi.co/site.webmanifest

Technologies

Detected frameworks, languages, and tools.

Ruby on Rails

Hosting & CDN

Hosting provider: —
CDN provider: —
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: Let's Encrypt
Subject: fi.co
Valid from: Jul 13, 2026
Valid to: Oct 11, 2026
Days until expiry: 74
SAN domains: fi.co

Security headers

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

Compression: gzip · 3 cookie(s) observed

Content & assets

Headings

H1 1 · H2 5 · H3 14

Links

44 internal · 8 external · 20 broken

Images

13 total · 6 missing alt

Scripts / Styles

13 scripts · 5 stylesheets

JS / CSS size

19.4 KB · 5.2 KB

Page size

148 KB

Robots.txt & Sitemap

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

SEO issues

Title longer than 60 characters
Meta description longer than 160 characters
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://fi.co
Final URL: https://fi.co
HTTP status: 200
HTTP version: HTTP/2
Response time: 645 ms
HTML size: 148 KB
Redirect chain: https://fi.co

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Frequently asked questions

What technology does fi.co use?: fi.co is built with Ruby on Rails.
Is fi.co secure (HTTPS)?: Yes. fi.co uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 11, 2026.
Who hosts fi.co?: Hosting provider information for fi.co is not available yet.
What is fi.co's SEO score?: fi.co scored 80/100 for SEO in the latest analysis (great).
What is fi.co's overall website score?: fi.co has an overall SiteGraph score of 89/100, combining SEO, performance, security, and accessibility.
What company operates fi.co?: fi.co is operated by Founder Institute. FI is becoming the world's largest AI-native company builder. Adeo Ressi on the five big changes: simplified curriculum, personalized sprints, built-in agents, and early funding at scale.