Berlin voice AI startup Deepslate raises €7.7M seed round

Berlin-based voice AI company Deepslate has announced a €7.7 million seed round led by Munich-based investor 42CAP, with Alstin Capital and existing backer SIVentures participating.

The company builds speech-to-speech models that process audio directly without converting it to text first, hosts everything inside the EU, and focuses on European languages and dialects. According to Tech.eu, the funding will go toward expanding European training data, cutting latency, and scaling infrastructure in European data centres.

Deepslate says its model recorded a 440-millisecond response time in the Artificial Analysis benchmark, the fastest speech-to-speech model on that leaderboard as of September 2026; these figures are company-cited, and the announcement discloses no valuation.