Privacy Policy

These bots turn text you send on WhatsApp or Telegram into a spoken voice note. This page explains exactly what happens to your messages. If anything here is unclear, you can get in touch (details at the end).

What we receive

Only what you send the bot: the text itself, a technical message id, and the identifier the platform uses to reach you: your phone number on WhatsApp, or your chat/user id on Telegram. We cannot see your other chats, and we cannot see your contacts.

What we do with it

The text is sent to the speech engine to produce an audio file, and that file is sent back to you. That is it. The text is not used to train models, is not sold, and is not shared with anyone beyond the services listed below.

What is stored, and for how long

• The audio file is deleted from our server immediately after it is sent to you.
• The text is kept by us for at most 7 days, and only to improve speech quality (for example, to see which kinds of text are not pronounced well). After 7 days it is deleted automatically, and only aggregate, anonymous counts remain (see below).
• In memory only, and temporarily: message ids (so you never get the same recording twice) and a request counter (to prevent overload). These expire on their own, and in any case when the service is restarted.

Aggregate and anonymous data

To run and improve the service we keep aggregate counts. We don't link these counts to you, sell them, or use them for ads. For example: how many messages, in what language and length, whether synthesis succeeded and how fast, the cost, which voice/speed people pick, and how often people return to the service. These numbers carry no message content and do not identify who sent what.

One thing you should know

On WhatsApp, your messages are stored by Kapso, the infrastructure provider that connects the bot to WhatsApp. The bot reads recent history from there to find messages that never got a reply (for example after an outage) and complete them. So while we do not keep your text long-term, it exists at Kapso under their policy.

On Telegram, your messages are stored by Telegram under Telegram’s policy. We read recent history there for the same reason: to find messages that never got a reply and complete them.

Services your text passes through

• WhatsApp / Meta: sending and receiving WhatsApp messages.
• Telegram: sending and receiving Telegram messages, and storing Telegram message history.
• Kapso: connects WhatsApp to the bot, and stores WhatsApp message history.
• Hetzner: the server that runs the bots.
• RunPod / Hugging Face: run the speech engine.

What we do not do

No tracking for advertising, no advertising, no selling of data, and no sharing of your content with anyone beyond the services above. No person routinely reads your messages.

The demo on this website

The live demo on bluetts.com is separate from the bots and runs entirely in your browser. The text you type is turned into speech on your own device and is never sent to us or to anyone else. Besides this site's own files, the only downloads are the model files (from Hugging Face) and the open-source code that runs them (from the jsDelivr CDN). The model files are stored in your browser, and that code is kept in its normal cache, so later visits do not download them again; you can remove them by clearing this site's data in your browser settings.

The engine

Speech is produced by BlueTTS by Max Melichov: https://github.com/maxmelichov/BlueTTS

Deletion and contact

Want us to delete all of your data? Send /forget to the bot and everything is erased immediately. For questions, contact Asaf Lecht: 0522663443