Amazon Polly vs Voicebox

Amazon Polly converts text to speech through a web interface and API. It lists 42 languages, voice cloning, and a maximum input of 6000. Audio can be exported as mp3, ogg_vorbis, ogg_opus, pcm, mu-law, or a-law. Voice options are organized into Standard, Neural, Long-Form, and Generative plans, with charges billed monthly for processed characters. Standard costs $4 a month for Standard voices and Speech or Speech Marks requests. Neural costs $16 a month for Neural voices and those request types. Long-Form costs $100 a month for Long-Form voices and those request types. Generative costs $30 a month for Generative voices and Speech requests. The free tier lists 5 million Standard characters, 1 million Neural characters, 500,000 Long-Form characters, and 100,000 Generative characters for 12 months. Amazon Polly is listed as founded in 2006 and headquartered in Seattle, Washington, United States.

Voicebox is a free, open-source local AI voice studio for voice cloning, speech generation, dictation, and agent voice output. Its desktop app can clone a voice from as little as three seconds of audio, supplied by file, microphone recording, or system capture. The maker lists seven text-to-speech engines for cloning, preset voices, and delivery control. A timeline editor supports multi-voice narratives, arranging tracks, trimming clips, and mixing conversations; effects include pitch shift, reverb, delay, and compression. Dictation uses a global shortcut to send transcripts to the focused text field or clipboard, with local Whisper models supporting 99 languages. MCP-aware agents such as Claude Code, Cursor, and Cline can speak through Voicebox, and a local REST API provides speech generation and related functions. The privacy policy says the offline desktop app requires no account and does not send recordings, profiles, transcripts, generations, or settings to the maker. Local is free with unlimited local generations and captures. Cloud and mobile sync are marked as coming soon, and cloud pricing and limits are not final.