Find here our press material, contact information and featured news.

Our Company

sproof is an Austrian-based startup company co-founded by Clemens Brunner, Fabian Knirsch and Erich Höpoldseder. sproof is supported by the FH Salzburg University of Applied Sciences Startup Center. sproof is reinventing digital signing and is creating tools for digitizing your business processes. sproof allows you to fast and easy integrate digital signatures in your existing processes and tools.

Our products:
– sproof registry: sproof registry creates a revolutionary and new kind of digital signature that allows you to issue your document digitally and secure. Furthermore, verification is easy, completely decentralized and does not require your interaction.
– sproof sign: sproof sign is a free online signature collection service that is easy to use and makes the collection of signatures fast and easy.

Contact Us

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Featured News


High resolution version of the sproof logo for download. sproof is a registered trademark.

The sproof management team (f.l.t.r. Erich Höpoldseder, COO – Clemens Brunner, CEO – Fabian Knirsch, CTO). Credit: Sandra Lagler/sproof GmbH

Press release sproof sign launch​

sproof sign launch high resolution picture: The sproof management team (f.l.t.r. Clemens Brunner, CEO – Erich Höpoldseder, COO – Fabian Knirsch, CTO).
Credit: Tobias Werner/sproof GmbH

sproof sign launch high resolution picture: Dr. Manfred Wurz, Managing Director at ADVOKAT