About Sumer Apps

Excel is the world's most-used business app with over one billion active licenses. But we know it's not perfect.

That's where we come in.

With Sumer, new capabilities don't mean new complications.

Sumer Excel add-ins sophisticate and simplify.

For over a decade, we've built local and web add-ins that modernize familiar workflows in the mighty Excel environment.

Trusted by thousands of professionals worldwide.

Meet Our Team

The success of our apps derives directly from our small team's ability to know Excel workflows inside and out.

Founder

Patrick Gilley brings decades of real-world experience stewarding hundreds of millions of dollars' in assets and projects, and managing hundreds of people.