Messaging apps like WhatsApp and Messenger have a near-monopoly on voice messages. Users who have left those platforms lose the ability to send voice messages to most contacts, because convincing people to install Signal or Telegram is unrealistic.

Everyone has an email address. That is the universal fallback.

Proposed feature: add voice message recording directly in Proton Mail.

If the recipient is a Proton Mail user, the voice message is delivered and played natively in the conversation view.

If the recipient uses any other email provider, they receive a standard email with a large Play button linking to a Proton-hosted page where the audio plays inline, no download or app install needed. This also gives non-Proton users a natural touchpoint to discover the platform.

Why this matters: it breaks the dependency on Meta apps without requiring contacts to change anything. Email is universal. Proton already handles end-to-end encryption for Proton-to-Proton messages and the same model applies here.

Optional addition: on-device transcription (via something like Whisper) included in the email body for recipients who cannot or prefer not to play audio.