cosskill
cosskill is an AI communication simulator for rehearsing high-stakes conversations — salary negotiations, performance feedback, difficult personal talks — by speaking with realistic AI personas before they happen.
About cosskill
What cosskill does
cosskill is an AI communication simulator for rehearsing high-stakes conversations before they happen. Users pick a persona and a scenario, then speak through the conversation — a salary negotiation, a performance review, a difficult personal talk — and get a realistic back-and-forth so the real conversation feels rehearsed rather than improvised.
Core capabilities
- Realistic AI personas — each persona holds a position, pushes back, and reacts the way the real counterpart might.
- Scenario library — salary negotiations, performance feedback, difficult personal talks, and other high-stakes conversations.
- Speak, don't type — practice happens in the browser, conversation-style.
- Immediate access — start practicing without an account.
Workflow
- Choose a scenario and persona.
- Hold the conversation with the AI counterpart.
- Learn where the talk gets hard, and what phrasing works.
Who it is for
Anyone facing a conversation where the words matter: employees preparing a raise discussion, managers rehearsing feedback, and people who want a safe place to practice hard personal conversations.
Pricing
Free to try: 3 practice messages without sign-up, 10 after sign-in, with all personas and scenarios available. Pro ($12.90/month or $129/year) unlocks unlimited practice.
Technology
cosskill is a web application built with Next.js and TypeScript; nothing to install.
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