IT Service Providers

sum.cumo GmbH

Digital agency building software and marketing solutions, with a focus on insurance and lottery companies

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TrustList summary

sum.cumo GmbH is a digital agency with offices in Hamburg and Düsseldorf. Its team covers digital consulting, user experience, technology and marketing, and it supports clients from start-ups to large corporations as they digitise their business models.

What sum.cumo GmbH offers

Digital consulting: advice on digitising business models.
UX design: user experience work for digital products.
Software development: tailor-made software built for each customer.
Marketing solutions: online marketing delivered alongside the software.

Who it serves

Long-standing customers from start-ups to corporations, with its core strength in the insurance and lottery industries.

Key facts

Based in: Hamburg and Düsseldorf, Germany
Founded: 2010
Growth: has expanded steadily since founding and is recruiting in all areas

Summary written by TrustList from the business's own published information, Oct 2026.

Categories & features

Rankings

sum.cumo GmbH is ranked on 2 TrustList rankings: #7 on 1 and #33 on 1.

Every ranking orders its listings by their reviews, how complete the profile is and the Trust Score. sum.cumo GmbH has no reviews yet and 3 of the 10 profile details we look for. Where no listing on a page has been reviewed, the order follows the profiles alone.

It service provider · 2 rankings

#7of 113
Software development › Germany
It is one of 10 here listing asp.net and one of 13 here listing node.js.
Of the top 64 here, 41 also cover e-commerce development and 40 also cover eCommerce; 2 also work in Belgium.
Behind ConSol Consulting & Solutions Software GmbH, ahead of schoene neue kinder GmbH.
#33of 132
Ui ux design › Germany
It is one of 28 here listing react native and one of 39 here listing CSS3.
Of the top 80 here, 69 also cover iOS app and 67 also cover android; 2 also work in United Kingdom and 2 also work in India.
Behind Silpion IT-Solutions GmbH, ahead of Giesecke + Devrient Mobile Security GmbH.