Postmark

postmarkapp.com ↗

Disclosed by 95 companies

1Password
Customer support

United States

“Postmark, Inc. | All Products | Customer support | US” source · checked Oct 24, 2026
Aleph
Email delivery

United States

“Postmark|Email delivery|USA” source · checked Oct 24, 2026
apilayer
SMTP service

United States

“Postmarkapp SMTP Service United States” source · checked Oct 24, 2026
Appointlet
Transactional emails

United States

“Postmark” source · checked Oct 24, 2026
Attio
Email delivery

United States

“Postmark” source · checked Oct 24, 2026
BigMarker
Transactional email delivery platform

United States

“Postmark/ActiveCampaign (Illinois, USA), Transactional Email Delivery Platform” source · checked Oct 24, 2026
Bird
Dashboard - log management and analysis software

United States

“Postmark | Dashboard - Log management and Analysis software | USA” source · checked Oct 24, 2026
BlogVault
Transactional communications

“Postmark Transactional communications” source · checked Oct 24, 2026
BoldSign
Sending transactional emails on behalf of the SaaS provider

United States

“Postmark | Email service provider” source · checked Oct 24, 2026
Botsonic
Transactional email (account, billing, security, product)

United States

“Postmark | Transactional email (account, billing, security, product) | United States” source · checked Oct 24, 2026
Breathe
Cloud-based Email Notification Services

United Kingdom

“Postmark, Inc. | Cloud-based Email Notification Services | United Kingdom” source · checked Oct 24, 2026
Broadcom
Email delivery (Endpoint Protection Mobile)

United States

“AC PM, LLC (ActiveCampaign) dba Postmark | Email delivery | United States” source · checked Oct 24, 2026
BrowserStack
Email notifications for enterprise customers

United States

“Postmark | Email notifications for enterprise customers” source · checked Oct 24, 2026
Cal.com
Automated transactional email: confirmations, reminders, calendar invites, inbound replies

United States

“Postmark (ActiveCampaign) AC PM, LLC Automated transactional email: confirmations, reminders, calendar invites, inbound replies” source · checked Oct 24, 2026
Chameleon
Delivers transactional emails

United States

“Postmark (US-based)” source · checked Oct 24, 2026
ChatBot
Email services through the Postmark product

United States

“ActiveCampaign, LLC (Postmark)” source · checked Oct 24, 2026
Chroma
Email Processing

United States

“Postmark” source · checked Oct 24, 2026
Clay
Email service provider

United States

“Postmark | Email service provider | United States” source · checked Oct 24, 2026
ClientSuccess
Email service provider

United States

“Postmark” source · checked Oct 24, 2026
Clozd
Email campaign and delivery services.

United States

“Postmark by ActiveCampaign | Email campaign and delivery services.” source · checked Oct 24, 2026
Coassemble
Email delivery

“Postmark Email delivery” source · checked Oct 24, 2026
Concord
Transactional text message sender

North America

“Postmark | Transactional text message sender | North America” source · checked Oct 24, 2026
Content Snare
Transactional email (sending your requests and reminders to your clients)

United States

“Postmark United States Transactional email” source · checked Oct 24, 2026
CookieChimp
Transactional email

United States

“Postmark | Transactional email | US” source · checked Oct 24, 2026
Countly
External mail server

United States

“Postmark External mail server” source · checked Oct 24, 2026
DealRoom
Email delivery service

United States

“Postmark | Email delivery service | United States” source · checked Oct 24, 2026
Dock
Email delivery

United States

“Postmark | Email delivery | US” source · checked Oct 24, 2026
Drata
Transactional email delivery

United States

“Postmark provides transactional email delivery services used to send system-generated emails from the platform and helps ensure reliable and secure email delivery to users.” source · checked Oct 24, 2026
Emburse
Transactional inbound and outbound email notifications

United States

“Postmark” source · checked Oct 24, 2026
Fathom
Email provider

United States

“Postmark • Email provider” source · checked Oct 24, 2026
Fillout
Email

United States

“Postmark | Email | US” source · checked Oct 24, 2026
Fingerprint
Transactional email provider with access to account email addresses

“AC PM, LLC (d/b/a Postmark) | 1 N Dearborn Street, Suite 500, Chicago, IL 60602 | Our transactional email provider” source · checked Oct 24, 2026
FreeAgent
Email delivery service

United States

“Postmark” source · checked Oct 24, 2026
Frontify
Transactional email service

United States

“ActiveCampaign (Postmark)” source · checked Oct 24, 2026
HackerRank
Sending invite and confirmation emails to candidates for assessments and interviews

United States

“Postmark | Active Campaign, LLC” source · checked Oct 24, 2026
Heartbeat
Transactional and marketing email

United States

“Postmark — Massachusetts, USA — Transactional & marketing email” source · checked Oct 24, 2026
HelpDesk
Email services

United States

“ActiveCampaign, LLC (Postmark) • Marketing” source · checked Oct 24, 2026
Hotjar
Email delivery service

United States

“Postmark” source · checked Oct 24, 2026
Hunter
Transactional emailing

United States

“AC PM LLC (Postmark)” source · checked Oct 24, 2026
Ignition
Transactional email delivery

“Postmark Transactional email delivery” source · checked Oct 24, 2026
JazzHR
Messaging & Notifications

United States

“Postmark | Messaging & Notifications | USA” source · checked Oct 24, 2026
Jiminny
Transactional email services

United States

“Postmark” source · checked Oct 24, 2026
Judge.me
Transactional email used to send review request emails

United States

“Postmark | Transactional email used to send review request emails” source · checked Oct 24, 2026
Knock
Application Email Service

United States

“Wildbit, LLC (Postmark)” source · checked Oct 24, 2026
Kong
Transactional email notifications

United States

“Active Campaign, LLC (Postmark)” source · checked Oct 24, 2026
Kustomer
Email Channel

United States

“Postmark” source · checked Oct 24, 2026
Linear
Email delivery

United States

“AC PM, LLC (Postmark) | Email delivery | United States” source · checked Oct 24, 2026
LiveChat
Email services through the Postmark product

United States

“ActiveCampaign, LLC (Postmark)” source · checked Oct 24, 2026
Lleverage
Transactional email

European Union

“Postmark | Transactional email | EU” source · checked Oct 24, 2026
Lucky Orange
Email delivery

United States

“Postmark” source · checked Oct 24, 2026