Murmur
Local AI voice studio for Mac — pay once
Murmur is a native Mac app that turns scripts into speech, with generation running on-device and, after setup, offline according to the vendor. Alongside the bundled Kokoro model it offers voice cloning and Voice Design, a library of 860+ community voices, multi-speaker projects, a batch queue, and WAV or M4A export. There is also a CLI and MCP support for driving it from a terminal or an agent.
It requires macOS 15 or later on an Apple Silicon Mac (M1 or newer); Intel Macs are not supported. Cloning and Voice Design need 16 GB+ unified memory plus extra model downloads. The maker notes that speed, storage needs, output quality and language support vary by model and machine, and that setup, license checks, community browsing and updates use the internet. The site also mentions Apple notarization and a 7-day money-back guarantee. No third-party costs are stated — there are no credits or cloud generation bills.
Why no subscription? Murmur is a one-time purchase of $49 USD. Instead of monthly fees or buying credits as with cloud voice services, you pay once and generate locally without a usage cap.
Keywords: text-to-speech · speech synthesis · voice cloning · offline · Apple Silicon · no subscription · one-time purchase · audio export
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