Pathwire Acquires Email on Acid In Move To Lead ESP Pack

The email vendor community has continued its consolidation with the acquisition of Email on Acid by Pathwire.

Terms of the transaction announced Wednesday were not disclosed. 

The goal is to provide “a reliable path to the inbox,” states Will Conway, CEO of Pathwire. 

Email on Acid CEO John Thies will step down from that role, but will continue as a consultant to the business to assist with the integration.

Roughly 45 Email on Acid employees will join the Pathwire team, bringing its total global headcount to 350 employees and contractors. 

A spokesperson said Email On Acid will retain its brand name for the time being. 

Email On Acid’s software-as-a-service allows users to view how emails will render in Gmail, Yahoo and other email platforms, and via mobile desktop and the web, and it also provides analytics. 



Pathwire, which delivers over 250 billion emails a year for brands such as DHL, Wikipedia, Toast, Lyft, and Microsoft, provides an email API and other email marketing tool.  

Email on Acid’s pre-deployment platform had already been integrated into Pathwire’s Mailjet product set. Mailgun and Mailjet users will get access to instant email testing, content checks, and analytics.

The combined technologies will enable “successful outcomes through a proactive, prescriptive approach,” Conway says. 

In addition, the purchase will advance Pathwire’s goal to become a comprehensive email service provider, Pathwire says.

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