Buttondown
Buttondown sells email newsletter publishing and delivery software to independent writers and publishers.
Subprocessors (11)
List updated Sep 17, 2026 · Checked Oct 25, 2026 · source disclosure ↗
| vendor | purpose | evidence |
|---|---|---|
| Application hosting and cloud infrastructure | “Amazon Web Services Application hosting and cloud infrastructure” | |
| Content delivery network and security services | “Cloudflare Content delivery network and security services” | |
| Business productivity and collaboration tools | “Google Workspace Business productivity and collaboration tools” | |
| Legacy domain ingress and TLS termination | “Heroku Legacy domain ingress and TLS termination” | |
| Email delivery and transactional email services | “Mailgun Email delivery and transactional email services” | |
| Customer support and help desk software | “Plain Customer support and help desk software” | |
| Email delivery and transactional email services | “Postmark Email delivery and transactional email services” | |
| Error monitoring and performance tracking | “Sentry Error monitoring and performance tracking” | |
| Internal communication and support tools | “Slack Internal communication and support tools” | |
| Payment processing and billing | “Stripe Payment processing and billing” | |
| Communication APIs and messaging services | “Twilio Communication APIs and messaging services” |
-
Application hosting and cloud infrastructure
“Amazon Web Services Application hosting and cloud infrastructure”
-
Content delivery network and security services
“Cloudflare Content delivery network and security services”
-
Business productivity and collaboration tools
“Google Workspace Business productivity and collaboration tools”
-
Legacy domain ingress and TLS termination
“Heroku Legacy domain ingress and TLS termination”
-
Email delivery and transactional email services
“Mailgun Email delivery and transactional email services”
-
Customer support and help desk software
“Plain Customer support and help desk software”
-
Email delivery and transactional email services
“Postmark Email delivery and transactional email services”
-
Error monitoring and performance tracking
“Sentry Error monitoring and performance tracking”
-
Internal communication and support tools
“Slack Internal communication and support tools”
-
Payment processing and billing
“Stripe Payment processing and billing”
-
Communication APIs and messaging services
“Twilio Communication APIs and messaging services”