Krisp Voice Isolation vs Vocly

Krisp Voice Isolation is a real-time voice model in Krisp VIVA, infrastructure for voice AI agents. It separates a main speaker from other voices, background chatter, and room echo before audio reaches speech-to-text processing. Krisp says Voice Isolation 2.5 runs on CPU with 15 ms latency and reduced word errors by 46% in its benchmark. The VIVA SDK also includes Turn Prediction, Interruption Prediction, Voice Activity Detection, and detectors for accent, gender, and synthetic speech. It runs server-side on premises or in a customer's cloud, ahead of the speech-to-text engine, and is designed to work with any STT engine. Listed integrations include LiveKit, Pipecat, and raw WebRTC pipelines. SDKs are listed for Python, Node.js, Go, and iOS; input and output are PCM S16LE, 16 kHz mono. The broader AI Voice SDK library supports Windows, Mac, Linux, web, iOS, and Android.

Vocly is an Android app that uses on-device AI to separate phone audio and video into vocal and instrumental tracks. Standard mode separates vocals and instrumental; Advanced mode also separates drums, bass, and other sounds. It accepts MP3, M4A, WAV, FLAC, and OGG audio. The mixer can mute, solo, balance, loop, change tempo from 75–125%, shift pitch by ±6 semitones, and compare with the original. Users can add and synchronize lyrics for karaoke. Imported MP4 or MOV video can be exported with vocals or music while retaining its picture. Audio exports include M4A, WAV, and FLAC, with individual stems or custom mixes. Separations are saved locally, and a batch queue handles multiple files. After a one-time model download, processing works offline. The Free plan costs nothing and includes ads, separation, mixer, karaoke mode, and a stem library. Pro monthly and lifetime plans have prices not listed.