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Case study

How SimplBooks streamlined accounting for thousands of users

Published: December 02, 2020 | Updated: October 14, 2025

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Louise Basse

Senior Content Writer,

Mastercard

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Based in the Estonian capital, Tallinn, SimplBooks is an online accounting platform that’s on a mission to make accounting easy and accessible for all businesses. 

As the platform expanded its services to Finland, SimplBooks decided to team up with an open finance partner that could deliver instant access to all bank accounts in Northern Europe through one simple integration, as well as the ability to pay invoices directly. 

We talked with the CEO of SimplBooks, Jaanus Reismaa, to hear how he believes open finance can be leveraged in the accounting space. 

Build or buy?

There’s no doubt that SimplBooks has come a long way with their accounting platform that’s now used by more than 20,000 users. SimplBooks still consists of a small and agile team that takes care of everything their users need to spend as little time on accounting tasks as possible in their day-to-day lives.

When the company started its expansion journey from Estonia to Finland, SimplBooks looked for an open finance partner that could provide instant access to banks so they wouldn’t have to spend valuable time doing this themselves. 

And with our fast-track open finance platform, SimplBooks was able to integrate all banks in Finland without having to worry about any complexities. Jaanus explains:

We knew how to make agreements with banks in Estonia, but in Finland the process seemed a lot more complex. We didn’t have the right contacts or know-how to solve that problem and that makes [Mastercard] the perfect match for us. With that solution, we don’t have to deal with all the banks ourselves.

Placing the power of an online bank in the accounting platform

Dealing with stacks of invoices on the desk, creating billing reports, checking and matching transactions one by one. Those are just some of the tasks that most businesses must deal with to keep up with their accounting needs.

But with open finance, SimplBooks was able to create an all-in-one accounting platform that frees up time-consuming tasks for its users, explains Jaanus: 

“The partnership enables us to integrate financial data and payments directly in our accounting platform. With [Mastercard], you don’t have to manually enter data into your accounting platform anymore. It helps reduce human errors and other mistakes that are likely to happen when dealing with manual processes such as the invoice number, the amount, the client name and more,” he says and continues:

Our ultimate goal is that the user has to spend as little time as possible on our software. Instead, they should be focused on running their main business.

While our data platform enables any business to automate workflows, reduce the risk of human error and create more personalized services, our payment platform supports any business that looks to integrate instant payments from their service – whether you’re an online merchant or an accounting system provider. 

Want to learn how you can use open finance to create future-proof accounting solutions? Reach out to our team to get started.

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