About Us

Powering 25% of the world's legitimate email

Message Systems email infrastructure software is the preferred choice of the world’s best known cloud businesses, email service providers, telecom companies and large enterprises that depend on email to drive revenue. Collectively, Message Systems customers, including LinkedIn, Twitter, Groupon, Salesforce, Marketo, Oracle, Time Warner, Comcast, AT&T and American Express, move over 3 trillion messages a year – more than 25 percent of the world’s legitimate email. These prestigious companies choose Message Systems because our software outperforms any cloud or on-premises alternative, and provides the flexibility, deliverability and control they need to drive the highest possible customer engagement for their business.​

Where we started

Our company was founded in the late 1990s by brothers George and Theo Schlossnagle with a very clear vision: to create a superior alternative to open-source MTA systems that were at the time the only viable choice for high volume email implementations. The solution they developed, the Momentum messaging platform, eliminated the rigid scalability, extensibility and management problems common with MTA-based architectures, all while driving down operating overhead and eliminating racks of servers at rates as high as 14-to-1. 

In November 2014 SparkPost, built by Message Systems, was made available in private beta. SparkPost puts the  power and functionality of our Momentum platform into the hands of developers at companies of all sizes in an easily accessible cloud solution. With SparkPost, they can  easily integrate pay-as-you-go email delivery into their web and mobile applications in minutes using a credit card.

With the acquisition of Port25 in February 2015, we added PowerMTA (PMTA) to our product family. This on-premises solution is a perfect complement to our  Momentum platform and further expanded our ability meet the email infrastructure needs of companies of all sizes who prefer an on-premises solution.

The road ahead

Since shipping our first product in 2001 – known as Ecelerity, the forerunner to Momentum – Message Systems has grown steadily into the global company we are today. Currently, more than 150 Message Systems employees work in our offices around the world, and we're adding new people all the time. In addition to our headquarters in Columbia, Maryland, we maintain U.S. offices in San Francisco and Seattle, and international offices in Europe.

From the start, Message Systems has relied on strong demand for our solutions and an expanding customer base to drive growth. In recent years strategic investments from NewSpring Ventures and LLR Partners have further strengthened our market position, helping to accelerate product development and international expansion. With our combination of best-in-class technology, unrivaled industry expertise and passionate, dedicated people, Message Systems is determined to continue innovating, and maintaining our solutions as the standard against which all other messaging products are measured.