Rank #1,147Updated November 10, 2026
gitbook.io
The knowledge layer for AI | GitBook
The site runs on Framer, Google Ads, LinkedIn Insight Tag and 8 other technologies. Its email security grade is C. Its SSL certificate is issued by Google Trust Services and is valid for 52 more days.
- Domain age
- —
- Technologies
- 11
- Email security
- C
- SSL days left
- 52
DNS records
| Type | Value | TTL |
|---|---|---|
| A | 172.64.147.209 | 300 |
| A | 104.18.40.47 | 300 |
| MX | aspmx.l.google.com 10 | 300 |
| MX | alt1.aspmx.l.google.com 20 | 300 |
| MX | alt2.aspmx.l.google.com 20 | 300 |
| MX | aspmx2.googlemail.com 30 | 300 |
| MX | aspmx3.googlemail.com 30 | 300 |
| NS | dahlia.ns.cloudflare.com | 86400 |
| NS | hugh.ns.cloudflare.com | 86400 |
| TXT | 8277640 | 300 |
| TXT | 8lncom12tnn1so22eu2gvaoe9q | 300 |
| TXT | google-site-verification=9HmRew5KGY83Wzed-UhP71FdHHbV3qoUKP5h_Jenjeo | 300 |
| TXT | google-site-verification=jOO29_Act4pfhfArsLE_txCdET-NuQQyqp1aAG5-H8s | 300 |
| TXT | google-site-verification=mAI4k7A4RaCrAbrsgv7m8w6VPx0irEHUO3bHYEPPwdI | 300 |
| TXT | openai-domain-verification=dv-5coTbUFl8eIUWr3rQkpd9lw2 | 300 |
| TXT | v=spf1 a mx include:_spf.google.com include:sendgrid.net include:stspg-customer.com -all | 300 |
| AAAA | 2a06:98c1:310d::6812:282f | 300 |
| AAAA | 2606:4700:4401::ac40:93d1 | 300 |
Technology stack
Advertising
CDN
CMS
Fonts
Marketing automation
Security
Analytics and advertising IDs
google_analytics:G-XDQWKTB16Ggoogle_ads:AW-11226840316microsoft_clarity:y8vbjca43qlinkedin_insight:9917226Other sites using the same IDs: gitbook.com
SSL certificate
| Valid | Valid |
|---|---|
| Issuer | US, WE1, Google Trust Services |
| Expires | January 1, 2027 |
| Days remaining | 52 |
| Protocol | TLSv1.3 |
| Names | gitbook.io, mta-sts.gitbook.io |
Email security
CScore 76/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
- warnDKIM key found (selector: google) but it is only 1024 bits; 2048 is recommended.
- warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
- warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
- warnNo BIMI record (optional: shows your logo next to your emails in supporting inboxes).
- goodSPF record found.
- goodSPF ends with -all: servers you have not listed are rejected (hard fail).
- goodDMARC policy is quarantine: failing mail goes to spam. Move to p=reject for full protection.
- goodDMARC aggregate reports are sent to mailto:[email protected].
- good5 MX record(s) found. Mail is handled by Google Workspace.
Homepage metadata
| Title | The knowledge layer for AI | GitBook |
|---|---|
| Description | GitBook is a knowledge platform that connects your docs, product and users, answers user questions, and identifies knowledge gaps. Docs-as-code support & AI insights included. |
| Language | en-US |
| Canonical | https://www.gitbook.com/ |
| Structured data | Organization, WebSite, SoftwareApplication |
| Indexable | Yes |
| Word count | 1523 |
About gitbook.io
What technology does gitbook.io use?
We detected 11 technologies on gitbook.io, including Google Ads, LinkedIn Insight Tag, Reddit Pixel, Amplitude, Google Analytics 4, Microsoft Clarity.
Does gitbook.io protect its email with SPF and DMARC?
gitbook.io scores 76/100 (grade C) for email security. DKIM key found (selector: google) but it is only 1024 bits; 2048 is recommended. No MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
What are the name servers of gitbook.io?
gitbook.io uses dahlia.ns.cloudflare.com, hugh.ns.cloudflare.com.