European-based payment service, SumUp, announced a new round of funding yesterday. American Express and Groupon participated in the round.

Previous investors also contributed, including:

• b-to-v Partners 
• Shortcut Ventures
• Tengelmann Ventures
• business angels

While the Dublin-based company isn’t disclosing the exact amount of the funding, it hinted that it was a multi-million Euro investment.

The funding will be used to:

SumUp, a European player in the mobile-based card reader and point-of-sale space, recently launched in Russia and has opened an office in Moscow.

In Russia, the SumUp card reader will support all major credit and debit cards, including MasterCard and Visa. Support for American Express is coming soon.

The Ireland-based company is now operating in 11 countries:

The partnership between the two companies means that the iPad-based cash registers provided by Revel Systems now will be able to process both debit and credit card payments.

Revel Systems hopes that SumUp‘s technology will enable the company to expand into Europe, where the ability to process cards is critical. Revel currently has more than 100 store chains and restaurants in North America, Australia, and Saudi Arabia using its point-of-sale platform.

Called a “European Square”, SumUp is focused on building technology that will bring cashless, point-of-sale commerce to small businesses. All the merchant requires is SumUp’s portable card reader and the iOS or Android app, and they are ready to accept card payments on their mobile device.

SumUp was founded in 2011, and is headquartered in Dublin, Ireland. The company has raised $20 million in funding, and recently announced that it had added American Express cards to the range of cards SumUp can process.

SumUp was one of the companies that demoed their technology as part of FinovateEurope in February. See them in action at our FinovateEurope video page here.

European mobile payments company SumUp announced recently that it has added support for American Express in some of the European markets in which it operates.

Customers can make payments with an American Express credit card using either the traditional EMV method or SumUp’s new mobile payment method, SumUp Pay, that it demoed at FinovateEurope last week.

American Express payments are approved in the following markets:

• Germany
• France
• UK
• Ireland
• Italy
• Netherlands
• Spain
• Austria

Negotiations to accept American Express are still ongoing in Belgium and Portugal, the other two countries in which SumUp operates.

Unlike most merchants who accept American Express credit cards, those who use SumUp will not be faced with a premium fee. Instead, they will pay SumUp’s regular 2.75% per transaction fee.

In its press release, SumUp claims it will accept more types of cards in more regions than any other mobile point-of-sale technology provider worldwide.

SumUp’s demo video from FinovateEurope 2013 in London will be posted soon at finovate.com/archives.html.