Voice Challenge Verification: Why Bots Struggle With It

A short spoken challenge adds a strong “present in the moment” signal. Here’s what it blocks and how to use it safely.

A voice challenge is a simple concept: the user reads a short list of words (or a short code) out loud. It’s surprisingly effective against low-effort bots and replay attacks.

What it protects against

• Automated form-fill bots that can’t speak.
• Stolen screenshots that prove nothing about the current moment.
• Many replay attacks if you include a fresh, random prompt.

Make it context-bound (optional)

If you’re verifying someone in a chat, ask them to include a code you choose (e.g., “blue tiger”). The verification page then shows the same code, tying the proof to your conversation.

Keep privacy in mind

Voice verification should be short-lived and purpose-limited. Our badges expire automatically and can be issued in private mode without showing a face.