Open source focus

Open Source Alternatives to Nemesysco

12 open source Speech options similar to Nemesysco, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Every company listed publishes its source: each one carries an open source sector tag and a public GitHub repository.

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Vocode
Not rated
Open-source library for building hyper-realistic voice agents and conversational AI applications.
Open source · Self-hostable
Rasa
Not rated
Open-source conversational AI platform for building custom chatbots and virtual assistants.
Open source · Self-hostable
pyannote SAS
Not rated
Company
Open source
Kyutai
Not rated
A non-profit AI research lab focused on open science and developing advanced multimodal and voice AI models.
Open source · Self-hostable
Logz.io
Not rated
Logz.io provides an observability platform for cloud-native businesses, combining open-source tools for monitoring and security.
Open source · Self-hostable
Puck
Not rated
Open-source, AI-driven endpoint investigation tool for security teams.
Open source · Self-hostable
CloudQuery
Not rated
Open-source data integration platform for security and infrastructure teams.
Open source · Self-hostable
Velum Labs
Not rated
Firewall that controls access to information across AI and humans
Open source · Self-hostable
Mycroft
Not rated
Open-source, privacy-focused voice assistant and AI platform.
Open source · Self-hostable
WhisperWeb
Not rated
Free in-browser Whisper transcription and subtitle editor; audio stays on your device.
Open source
Pomvox
Not rated
Press a key, talk, and clean text appears at your cursor, transcribed on the Apple Neural Engine. Free, open source, and fully private.
Open source
Signal
Not rated
End-to-end encrypted messaging and voice calling app focused on privacy and security.
Open source

Company	License	Founded	Rating	Reviews
VocodeOpen-source library for building hyper-realistic voice agents and conversational AI applications.	Open source · Self-hostable	-	Not rated	-
RasaOpen-source conversational AI platform for building custom chatbots and virtual assistants.	Open source · Self-hostable	-	Not rated	-
pyannote SASCompany	Open source	-	Not rated	-
KyutaiA non-profit AI research lab focused on open science and developing advanced multimodal and voice AI models.	Open source · Self-hostable	-	Not rated	-
Logz.ioLogz.io provides an observability platform for cloud-native businesses, combining open-source tools for monitoring and security.	Open source · Self-hostable	-	Not rated	-
PuckOpen-source, AI-driven endpoint investigation tool for security teams.	Open source · Self-hostable	-	Not rated	-
CloudQueryOpen-source data integration platform for security and infrastructure teams.	Open source · Self-hostable	-	Not rated	-
Velum LabsFirewall that controls access to information across AI and humans	Open source · Self-hostable	-	Not rated	-
MycroftOpen-source, privacy-focused voice assistant and AI platform.	Open source · Self-hostable	-	Not rated	-
WhisperWebFree in-browser Whisper transcription and subtitle editor; audio stays on your device.	Open source	-	Not rated	-
PomvoxPress a key, talk, and clean text appears at your cursor, transcribed on the Apple Neural Engine. Free, open source, and fully private.	Open source	-	Not rated	-
SignalEnd-to-end encrypted messaging and voice calling app focused on privacy and security.	Open source	-	Not rated	-