> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/companies-using/postmark/ # Companies using Postmark Postmark is a transactional email delivery service that focuses on fast, reliable delivery of app generated messages. Here are the organizations where it was detected, where it is most common and how to reach the people who run it. By Enrich.chat Editorial. Updated October 21, 2026. **Short answer:** Organizations that use Postmark include TotalEnergies, Canada Post / Postes Canada, Specsavers, City of Houston and Team for the Planet. Postmark is in the email and productivity category; below are the industries where it is most common, how adoption changes with size and the tools found alongside it. ## What is Postmark? Postmark is a transactional email delivery service that focuses on fast, reliable delivery of app generated messages. It sits in the email and productivity category and is usually owned by engineering and DevOps leaders. ## Which companies use Postmark? Organizations where Postmark was detected include TotalEnergies, Canada Post / Postes Canada, Specsavers, City of Houston and Team for the Planet. The table lists a selection of larger ones in alphabetical order; names link to company profiles. | Company | Industry | Size | | --- | --- | --- | | [ABC Supply](https://enrich.chat/company/abc-supply/) | Building materials | 10,000 to 25,000 | | Alfanar | Electrical and electronic manufacturing | 5,000 to 10,000 | | Apotex | Pharmaceuticals | 5,000 to 10,000 | | [Barry-Wehmiller](https://enrich.chat/company/barry-wehmiller/) | Machinery | 10,000 to 25,000 | | Boscov's | Retail | 10,000 to 25,000 | | [Canada Post / Postes Canada](https://enrich.chat/company/canada-post-postes-canada/) | Package and freight delivery | 50,000 to 100,000 | | [City of Houston](https://enrich.chat/company/city-of-houston/) | Government administration | 10,000 to 25,000 | | Cross Country Healthcare | Staffing and recruiting | 5,000 to 10,000 | | Crédit Agricole Italia | Banking | 5,000 to 10,000 | | Firjan | Civic and social organization | 5,000 to 10,000 | | [General Dynamics Mission Systems](https://enrich.chat/company/general-dynamics-mission-systems/) | Defense and space | 10,000 to 25,000 | | ITV | Media production | 5,000 to 10,000 | | Jackson Hewitt Tax Service | Financial services | 5,000 to 10,000 | | [Meesho](https://enrich.chat/company/meesho/) | Information technology and services | 10,000 to 25,000 | | NI (National Instruments) | Electrical and electronic manufacturing | 5,000 to 10,000 | | Organon | Pharmaceuticals | 10,000 to 25,000 | | [Party City](https://enrich.chat/company/party-city/) | Retail | 10,000 to 25,000 | | Prime | Transportation, trucking and railroad | 10,000 to 25,000 | | [Securitas Nederland](https://enrich.chat/company/securitas-nederland/) | Security and investigations | 10,000 to 25,000 | | [Shake Shack](https://enrich.chat/company/shake-shack/) | Hospitality | 10,000 to 25,000 | | [Specsavers](https://enrich.chat/company/specsavers/) | Retail | 25,000 to 50,000 | | Splunk | Information technology and services | 10,000 to 25,000 | | Steel Dynamics | Mechanical or industrial engineering | 10,000 to 25,000 | | [Team for the Planet](https://enrich.chat/company/team-for-the-planet/) | Nonprofit organization management | 10,000 to 25,000 | | [Times Internet](https://enrich.chat/company/times-internet/) | Information technology and services | 10,000 to 25,000 | | [TotalEnergies](https://enrich.chat/company/totalenergies/) | Oil and energy | 100,000+ | | [Twitch](https://enrich.chat/company/twitch/) | Information technology and services | 10,000 to 25,000 | | [UMC Utrecht](https://enrich.chat/company/umc-utrecht/) | Hospitals and health care | 10,000 to 25,000 | | Unacademy | E-learning | 5,000 to 10,000 | | Université catholique de Louvain | Research | 5,000 to 10,000 | ## Do larger companies use Postmark more? For each size range, the column shows the share of listed organizations where Postmark was detected. **Figure: Postmark by company size.** Six columns, one per size range from 2,000 to over 100,000 employees, showing the share of organizations where Postmark was detected: 2-5K 0%, 5-10K 1%, 10-25K 1%, 25-50K 0%, 50-100K 0%, 100K+ 0%. *Share of listed organizations in each size range where Postmark was detected.* ## What tools go with Postmark? Among the organizations that use Postmark, these tools stand out: each is detected more often alongside Postmark than across all the organizations listed. The tick on each bar marks that wider average. **Figure: Tools that stand out among Postmark users.** Bars for the share of Postmark users that also use each tool, with a tick for the share across all listed organizations: Adobe Marketing Cloud 20% against 10%, SendGrid 20% against 9%, Gravity Forms 18% against 7%, Mandrill (Mailchimp) 15% against 6%, Mailgun (Rackspace) 15% against 5%, Mailchimp SPF 14% against 6%, AT Internet 11% against 4%, FullStory 11% against 4%. *Share of organizations using Postmark where each tool was also detected. The tick marks the share across all listed organizations.* [Adobe Marketing Cloud](https://enrich.chat/companies-using/adobe-marketing-cloud/)[SendGrid](https://enrich.chat/companies-using/sendgrid/)[Gravity Forms](https://enrich.chat/companies-using/gravity-forms/)[Mandrill (Mailchimp)](https://enrich.chat/companies-using/mailchimp-mandrill/)[Mailgun (Rackspace)](https://enrich.chat/companies-using/rackspace-mailgun/)[Mailchimp SPF](https://enrich.chat/companies-using/mailchimp-spf/)[AT Internet](https://enrich.chat/companies-using/at-internet/)[FullStory](https://enrich.chat/companies-using/fullstory/) ## How do you reach the people who run Postmark? The tool tells you what a company already runs; the people to talk to are usually engineering and DevOps leaders. Pick an account from the table, then ask your AI agent for them. ```text Use www.enrich.chat to find the engineering and DevOps leaders at [company], with titles and verified work emails ``` Check any other company with the free [tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/), or find a company's [email format](https://enrich.chat/tools/email-format-finder/). ## Frequently asked questions ### What companies use Postmark? Organizations where Postmark was detected include TotalEnergies, Canada Post / Postes Canada, Specsavers, City of Houston and Team for the Planet. The page lists a selection of larger ones with links to their profiles. ### Which industries use Postmark most? Postmark is used across a range of industries. ### How is Postmark usage detected? From public signals: code and tags on a company's website, the HTTP headers its servers send, and DNS records. A detected tool shows it was seen, not what the company pays for it. ### Who should I contact at a company that uses Postmark? Usually engineering and DevOps leaders. Ask your AI agent to use www.enrich.chat to find people in those roles at the account, with verified work emails. ## Try this prompt Find the people who run Postmark ```text Use www.enrich.chat to find the engineering and DevOps leaders at [company], with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [Companies using Microsoft 365](https://enrich.chat/companies-using/microsoft-365/) - [Companies using Microsoft Outlook](https://enrich.chat/companies-using/microsoft-outlook/) - [Companies using Amazon SES](https://enrich.chat/companies-using/amazon-ses/) - [Companies using Google Workspace](https://enrich.chat/companies-using/google-workspace/) - [Companies using Gmail](https://enrich.chat/companies-using/gmail/) - [Companies using SendGrid](https://enrich.chat/companies-using/sendgrid/) - [Companies using Mailchimp SPF](https://enrich.chat/companies-using/mailchimp-spf/) - [Companies using Mandrill (Mailchimp)](https://enrich.chat/companies-using/mailchimp-mandrill/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)