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Products & Services
About Postmark
Send transactional and marketing emails and get them to the inbox on time, every time. Postmark is a fast and reliable email delivery service for developers.
Its primary NAICS classification is 518210 (Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services). Postmark is one of 5,647 IT companies listed in Illinois.
Business Contact Information
- Phone
- +1 (855) 2867373
- Website
- postmarkapp.com
- linkedin.com/company/postmarkapp
- facebook.com/postmarkapp
- Address
- 1 N Dearborn St, Chicago, Illinois, 60602, United States
Industry & Classification
- Industry
- IT
- Sector
- Software and Services
- Segment
- Software
NAICS Codes
- 51Information
- 5182Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services
- 518210Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services
SIC Codes
- 73Business Services
- 737Computer Programming, Data Processing, And Other Computer Related Services
- 7374Data Processing, Hosting, and Related Services
Company Details
- Employees
- 62 (51-100)
- Annual Revenue
- $3.4M ($1M-$5M)
Postmark: frequently asked questions
What does Postmark do?
Send transactional and marketing emails and get them to the inbox on time, every time. Postmark is a fast and reliable email delivery service for developers.
Where is Postmark located?
Postmark is headquartered at 1 N Dearborn St, Chicago, Illinois, 60602, United States.
How many employees does Postmark have?
Postmark has about 62 employees (the 51-100 range).
What is Postmark's annual revenue?
Postmark's annual revenue is estimated at $3.4M (the $1M-$5M range).
What industry is Postmark in?
Postmark is in the IT / Software and Services industry, and its primary NAICS code is 518210 (Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services).
How can I contact Postmark?
Its website is postmarkapp.com and its phone number is +1 (855) 2867373.
What companies are similar to Postmark?
Other large iT companies in Illinois include Morningstar Inc, Alight, Paylocity and IFS.
Largest it companies in Illinois
Largest companies in Illinois
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Manufacturing sales in Illinois, 2026
In Illinois, Factur's 2026 study counted 74 manufacturing quotes worth $11.8M and 14 purchase orders over 12 months: 19% of quotes became orders, against 21% nationally. See the Illinois data.
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