Apple Siri

Apple's voice-activated AI assistant integrated across iOS, iPadOS, macOS, watchOS and HomePod for hands-free device control and search.

3 Alternatives Found

OpenVoiceOS (OVOS)

Netherlands

Open-source voice AI platform and Mycroft successor, governed by the OpenVoiceOS Foundation (Netherlands, 2025). Fully local and privacy-respecting with no US cloud dependency.

Key Features

Fully self-hostable voice assistantOn-device speech recognition and NLPNo data leaves device by defaultSuccessor to Mycroft AI

Free / open-sourceCompletely free; optional cloud services from community providers

Website

Home Assistant Voice

Netherlands

Voice assistant pipeline built into Home Assistant, governed by the Open Home Foundation (Netherlands). Fully local smart home voice control using open-source Whisper and Piper.

Key Features

Local voice pipeline via Wyoming ProtocolOn-device wake word detectionWhisper STT and Piper TTS — fully localNo cloud required

Free / Nabu Casa €6.50/month optionalCore free and self-hosted; Nabu Casa optional for remote access

Website

Rhasspy3 (experimental)

Community / Europe

Next-generation rewrite of the Rhasspy offline voice toolkit. Fully local and modular. Recommended for technical users; the original Rhasspy was archived in October 2025.

Key Features

100% offline voice assistant toolkitNo internet connection requiredModular STT, NLU, TTS pipelineSupports 17+ languages including DE, FR, NL, ES

Free / open-sourceFree and self-hosted; experimental — not yet production-ready

Website

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