Overview
Founded by Nicolas Kwiatkowski, ZalesMachine is a sales automation agency based in Argentina that helps companies across the world implement AI, automation, and technology into their sales processes. The team runs high-performing outbound campaigns that combine personalization with scale, helping clients book more meetings and close more deals.
In just a year and a half, ZalesMachine has worked with more than fifty clients, including brands like Payoneer, along with several leading companies in Mexico, the United States, and Argentina. Their campaigns achieve impressive engagement, touching 80% reply rates for special events and averaging 6 to 8% for regular outbound campaigns.
The Challenge
Before discovering Aerosend, ZalesMachine relied entirely on Google and Outlook mailboxes. These worked well in some regions, but issues quickly surfaced in markets like Mexico, where over half their leads used private email domains. This led to serious deliverability challenges and limited campaign reach, forcing the team to constantly monitor domain health instead of focusing on scale and performance.
The Switch to Aerosend as an Alternative to Outlook and Google
When the team found Aerosend, the difference was clear from the start. The onboarding was simple and fast, with new mailboxes and domains ready to use within days. The transition was smooth, allowing ZalesMachine to quickly shift focus back to optimization and client results instead of technical firefighting.
The Results
After switching, deliverability and reputation scores saw a major lift. For clients running campaigns through Aerosend, 98% of inboxes maintained perfect reputation scores, while only 80% of those using Outlook achieved similar performance. The impact on campaign effectiveness was equally significant, with reply rates increasing from 1.3% on Outlook to 2.75% on Aerosend.
“It’s always good to have options when building outbound systems. If you’re only using Outlook or Gmail, try Aerosend. The setup is quick, the support is incredible, and the results speak for themselves. Our inbox reputation has never been this consistent, and the team is always there when we need help.” – Co-founder, Nicolas Kwiatkowski, ZalesMachine
26 Nov 2025
