London-based voice biometrics and deepfake detection startup Voxmind, has closed a £546,491 pre-seed round led by Ascension Ventures. The round also includes participation from Mark McDermott (co-founder of ScreenCloud), lead angel Russell Hart, and members of the Cambridge angel network.
The funding arrives at a structural inflection point in enterprise authentication.
Microsoft retired Azure Speaker Recognition in September 2025 and AWS ends support for Voice ID in May 2026, two of the three major cloud providers have now exited voice biometrics. The hardware OEMs, contact centre operators, and enterprises that relied on those services are now without a long-term authentication layer, precisely as deepfake voice fraud accelerates against financial services, telecoms, and enterprise voice channels.
Founded in January 2024, the company has developed a patent-pending phoneme-frequency extraction engine that analyses the biomechanics of the human vocal tract, physical signal characteristics governed by anatomy, not language.
The result is voice authentication and deepfake detection that works across all languages by design, achieves 99.8 per cent deepfake detection accuracy in under 3 seconds, and runs in under 500MB of runtime memory with no GPU or cloud connectivity required.
