Berlin-based Mirelo raised $41 million in seed financing led by Index Ventures and Andreessen Horowitz to tackle a gap in AI video: sound. The two-year-old startup builds models that generate synchronized sound effects from video, with its SFX v1.5 released earlier this year. The round, which follows a previously undisclosed pre-seed led by Atlantic, brings total funding to $44 million. Mirelo plans to double or triple its 10-person team to accelerate R&D and commercialization, including API distribution and a creator workspace called Mirelo Studio. The company says its training relies on public and licensed sound libraries and includes revenue-sharing agreements with rights holders, positioning it amid intensifying scrutiny of generative AI datasets. Competition is emerging from larger players, including Sony, Tencent, Kuaishou’s Kling AI and ElevenLabs, while Google’s Gemini has begun to layer audio onto video via DeepMind’s Veo. Mirelo targets creators and prosumers with a freemium model and a €20-a-month plan, and is exploring AI music generation longer term. Valuation was not disclosed, though the company said it rose “very significantly.” Angel backers include Mistral CEO Arthur Mensch and Hugging Face’s Thomas Wolf.
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