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We use the e-mail addresses and postal addresses of our existing customers for self-promotion of our products and services. The legal basis for this is the legitimate interest according to Art. 6, § 1 f GDPR. You have the option to object to this processing at any time. To object, send an email to

OpenTalk GmbH

Schwedter Str. 9a
10119 Berlin, Germany

Phone: +49 30 40 50 51 - 344