How Mailsuite centralized global tax compliance with Quaderno

About Mailsuite

Mailsuite was created to help professionals and businesses improve productivity through smarter email tools and workflow automation. Best known for solutions like Mailtrack, the company has grown into a trusted platform used by teams and professionals around the world to streamline communication and work more efficiently.

As Mailsuite expanded internationally, managing tax compliance across multiple jurisdictions became increasingly challenging. Operating globally meant navigating different tax regulations, filing requirements, and deadlines — particularly in the United States, where each state has its own rules and processes.

For Agus García, CFO of Mailsuite, it quickly became clear that managing international tax obligations internally would require significant time and resources. The company needed a reliable, centralized partner that could simplify compliance and reduce operational complexity while supporting rapid growth.

The challenge

As Mailsuite grew internationally, managing taxes quickly became more complicated. Selling across multiple countries and registering in 15 different US states meant dealing with different rules, deadlines, and filing requirements everywhere.

Handling all of this internally would have taken a huge amount of time from the finance team and increased the chances of mistakes or compliance issues. Beyond the operational workload, the lack of centralized coordination across jurisdictions added additional stress and complexity during a critical growth phase.

The solution

Quaderno helped Mailsuite centralize and simplify its international tax compliance strategy.

Throughout the US registration process, Quaderno guided the team step by step, helping them understand the requirements for each state, answering questions, and coordinating the filing process across jurisdictions.

Instead of handling multiple advisors and systems independently, Mailsuite benefited from a single partner that provided visibility and support throughout the process. For Agus García and his team, the experience was not just about software — it was about having expert guidance in a highly complex and constantly evolving tax environment.

Results

By partnering with Quaderno, Mailsuite significantly reduced the operational burden of international tax compliance:

• Centralized management of tax compliance across multiple countries and jurisdictions
• Successful registration across 15 US states
• Significant time savings for the finance team — hours previously spent on research and coordination
• Reduced risk of compliance errors and surprises
• Greater visibility and peace of mind throughout the international expansion

Advice for companies expanding internationally

Building scalable compliance processes early on is key when expanding into new markets.

International tax management can quickly become complex, especially in fragmented systems like the United States. Working with a centralized partner helps reduce operational burden, minimize the risk of errors, and allows teams to stay focused on growth rather than administrative work.