growthbook.io

Observed Jul 27, 2026, 14:03 UTC (5d ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain

Up right now

Runs onCloudflare

Email byGoogle Workspace

Secured byAmazon

Also usesGoogle Search ConsoleStripeHubSpot

tranco_5k

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat growthbook.io actually stands on - every host below is a signed observation

growthbook.io

A / AAAA

13.226.238.8213.226.238.7513.226.238.5213.226.238.68

Cloudflareserves the site

ns-1335.awsdns-38.orgns-176.awsdns-22.comns-1834.awsdns-37.co.ukns-876.awsdns-45.net

awsdns-38.org + awsdns-22.com + moreanswers its DNS

aspmx.l.google.comalt3.aspmx.l.google.comalt4.aspmx.l.google.comhejjtgeaxm7klwyevnmqzoy5ptpclxlrk5ya4ym7b4hxlujdjoxq.mx-verification.google.com+2 more

Google Workspacereceives its email

TLS

growthbook.io

Amazonissued its certificate

DNS Records

A 4

13.226.238.82
13.226.238.75
13.226.238.52
13.226.238.68

MX 6

1aspmx.l.google.com
10alt3.aspmx.l.google.com
10alt4.aspmx.l.google.com
15hejjtgeaxm7klwyevnmqzoy5ptpclxlrk5ya4ym7b4hxlujdjoxq.mx-verification.google.com
5alt1.aspmx.l.google.com
5alt2.aspmx.l.google.com

TXT 8

MS=ms63174900
OSSRH-77439
ca3-ab6f5f79d8054cd7ba6b094dd672d433
google-site-verification=4aAUYSkVSKkSQh-VS_o6uCgYz9c0nZTtEXzsWhVLCxQ
google-site-verification=Varnbn-_N00hrJRiOzrDcZwo_38xosL-3lNKcqjO_PM
stripe-verification=1a9b071bc35200679af1d32d9ae317cb1b8b61b403a3ce684936c870e370c6f7
v=spf1 include:_spf.google.com include:sendgrid.net include:8863617.spf04.hubspotemail.net -all
v=DMARC1; p=none;

NS 4

ns-1335.awsdns-38.org
ns-176.awsdns-22.com
ns-1834.awsdns-37.co.uk
ns-876.awsdns-45.net

SOA 1

ns-1834.awsdns-37.co.uk awsdns-hostmaster.amazon.com

TLS Certificates (3)

Common Name	Issuer	Expires
`growthbook.io`	C=US, O=Amazon, CN=Amazon RSA 2048 M04	Wed, 30 Dec 2026 23:59:59 +0000
`Amazon RSA 2048 M04`	C=US, O=Amazon, CN=Amazon Root CA 1	Fri, 23 Aug 2030 22:26:35 +0000
`Amazon Root CA 1`	C=US, ST=Arizona, L=Scottsdale, O=Starfield Technologies, Inc., CN=Starfield Services Root Certificate Authority - G2	Thu, 31 Dec 2037 01:00:00 +0000

Subdomains (0)

None observed.

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for growthbook.io. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/growthbook.io">
  <img src="https://domaindrift.io/badge/growthbook.io.svg"
       width="300" height="64" alt="DomainDrift signed observations for growthbook.io">
</a>

Ed25519 Receipt

Receipt ID: rcpt_eadd43000797217f
Output Hash: 23dfa88c0e75432c45738e593fe944ee5add13fdb7dea31d7b9c8181be80697f
Signature: ed25519:d0b9857b1f3dac2727d143da6b6acb620cc3b4d092286d916fc347a9eb05de05ee3fa4ba4b77a97957aadc1532012e36363561b08b57270551339b54bbba9c0e
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/growthbook.io