Tandem

Tandem is a language exchange app on iOS and Android that connects language learners with native speakers. Members can search for language exchange partners to talk to by either text or voice chat. As of July 2020, the app supports 300 languages including 20 sign languages, 20 indigenous languages, and six fictional ones such as Mandalorian or Klingon. History Tandem was founded in Hannover in 2014 by Arnd Aschentrup, Tobias Dickmeis, and Matthias Kleimann. Now headquartered in Berlin, Tandem launched its mobile app on iOS in 2015, followed by Android in 2016. Prior to Tandem, Aschentrup, Dickmeis, and Kleimann founded Vive, a members-only mobile video chat community. In 2015, Tandem closed a seed round of €600,000 from angel investors, including Atlantic Labs (Christophe Maire), Hannover Beteiligungsfonds, Marcus Englert (Chairman Rocket Internet), Catagonia, Ludwig zu Salm, Florian Langenscheidt, Heiko Hubertz, Martin Sinner, and Zehden Enterprises. In 2016, an additional €2m was raised from new investors, Rubylight and Faber Ventures, as well as existing investors Hannover Beteiligungsfonds, Atlantic Labs, and Zehden Enterprises.