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Bird Taxi For Email is an email design and productivity collaboration platform tailored for enterprise and agency teams. The company provides a tool that streamlines the email production process, enabling marketing teams to create high-quality emails more efficiently and at a larger scale. This platform effectively bridges the gap between email designers and marketers, allowing editors and copywriters to concentrate on content creation while ensuring that designers and developers can produce robust code without compromising the final output. By enhancing collaboration and productivity in email design, Bird Taxi For Email aims to improve the overall effectiveness of email marketing efforts.

eDataSource, Inc., established in 2003, specializes in competitive intelligence for email marketing, social media, and e-commerce activities. It monitors real-time data from active consumer inboxes worldwide, offering tools such as Competitive Tracker, Inbox Tracker, Design Tracker, and Partner API to optimize email campaigns and provide immediate insights into delivery issues. Serving a diverse range of clients from small businesses to Fortune 500 companies, eDataSource empowers marketers with precise, accessible data to enhance their email marketing strategies. As of late 2020, it operates as a subsidiary of Message Systems, Inc., headquartered in New York City.

Port25 Solutions, Inc. specializes in email infrastructure software, primarily focusing on client communications and email marketing applications both in the United States and internationally. The company's flagship product, PowerMTA, is a high-performance Message Transfer Agent (MTA) designed to efficiently manage the delivery of large volumes of email. This software enables senders to implement authentication standards and comply with policies for accountable email delivery, thereby enhancing delivery rates and return on investment for its users. Port25 Solutions serves a diverse clientele, including Fortune 500 companies, email service providers, financial institutions, publishers, consumer brands, and interactive social networks. Founded in 1999 and headquartered in Ellicott City, Maryland, the company has established itself as a key player in the email delivery space. As of February 2015, Port25 Solutions operates as a subsidiary of Message Systems Inc.