Techno-Speech is a Japanese software company based in Nagoya that develops voice synthesis and singing voice synthesis technology. Founded in 2009 as a spin-off connected to research from the Nagoya Institute of Technology, the company built its reputation on statistical and AI-based speech synthesis engines, and has collaborated with the CeVIO Project on releases such as CeVIO AI, a singing and talking voice synthesizer aimed at music producers, content creators, and hobbyists.

The company's own consumer brand is VoiSona (originally launched as CeVIO Pro), a vocal synthesis application available as a standalone editor and as a VST3/Audio Unit plugin. VoiSona Song focuses on AI-driven singing synthesis with expressive, editable phrasing, while VoiSona Talk covers text-to-speech with emotional character voices. Techno-Speech also licenses its Speech Synthesis SDK and Singing Synthesis SDK to third parties for use in games, karaoke systems, robotics, and other interactive applications.

In the music-production space, Techno-Speech's tools sit alongside other vocal synthesizers like Vocaloid and Synthesizer V, and are used primarily by producers creating virtual-vocalist tracks or needing synthesized lead and backing vocals inside a DAW.

Techno Speech has 1 product cataloged on Equipboard, including DJ Software.