Koala
An on-device noise-suppression engine that removes background noise from audio entirely offline, with SDKs for Python, Android, iOS, C and the web across desktop, mobile and Raspberry Pi.
Koala is an on-device noise suppression engine: all voice processing runs locally, and it supports Linux, macOS and Windows on x86_64 or arm64, Android, iOS, the major browsers, and Raspberry Pi 3 through 5.
Using it requires an AccessKey, a Picovoice authentication and authorization token that must stay secret and needs an internet connection to validate against Picovoice's license servers and usage limits, even though the noise suppression itself runs fully offline; usage and limits are visible on the Picovoice Console. Demo applications are provided in Python, for Android and iOS, in C, and for the web, each authenticated with an AccessKey obtained from that console.