Klu is a free AI sales simulator for practicing cold calls, discovery, and objection handling against an AI buyer that pushes back.

Voice roleplay - Speaks with an AI buyer out loud in the browser, with no sign-up or microphone setup for the sample.
Objection practice - Works through common blocks such as price objections with multiple reply options.
Live call flow - Runs a timed mock call with a visible buyer script and voice activity.
Coach feedback - Explains what each reply choice signals and suggests a stronger response.
Quiz and repeat - Combines a short quiz, a practice round, and feedback so each scenario can be run again.

It is used by sales representatives and founders who want to rehearse calls before talking to real prospects.

Starting is free in the browser, with a 3-day free trial for the full roleplay.