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AI roleplay for
conversations that matter

Some talks change everything—your salary, your relationship, or the respect you get at work. cosskill is an AI roleplay simulator where you rehearse these high-stakes moments before they happen. Pick a persona, say what you'd actually say, and practice until your words hold up.

Try It NowBrowse All Personas
33 personas·30 conversation guides·$0 to start
Elon MuskSteve JobsDonald TrumpWarren BuffettBreakup Message CoachAI Coworker
New · Mission Mode

Goal-oriented practice scenarios

Each scenario drops you into a specific scene with a goal. Live meters track how the other side reacts as you talk.

Mission

Breakup Message Coach

An AI coach for the message you are about to send: a breakup text, a final closure note, a reply to an ex, or a no-contact boundary. Clear, kind, and final on the first try.

Start MissionBriefing
Mission

AI Hiring Manager

A roleplay simulator for the raise conversation. You play yourself asking for more money; the AI plays a calm, slightly skeptical hiring manager whose budget is tight and whose patience runs out.

Start MissionBriefing
Mission

Defensive Direct Report

A roleplay simulator for the conversation managers avoid: telling someone good that their work has dropped. You play the manager; the AI plays a smart, defensive engineer who interrupts, goes quiet, or argues.

Start MissionBriefing
Mission

Angry Enterprise Customer

A roleplay simulator for the call after a major incident. You play customer success; the AI plays an enterprise customer whose production was down for four hours and who is already copying their CEO.

Start MissionBriefing
Mission

Guilt-Tripping Parent

A roleplay simulator for the conversation adult children rehearse in their head for years. You play yourself holding a boundary; the AI plays a loving parent who leans on sacrifice, old wounds, and "I know what is best for you."

Start MissionBriefing
Mission

Steve Jobs

An unofficial Steve Jobs AI that judges your product on taste, not feature count. It cuts first, asks what should not exist, and will not accept a pitch that takes ten minutes to explain.

Start MissionBriefing
Mission

Donald Trump

An unofficial Donald Trump AI that treats every conversation as a deal with leverage, concessions, and a winner. It opens extreme, holds the frame, and reframes retreat as a win.

Start MissionBriefing
Mission

Breakup Recovery Coach

An AI coach for the part after the breakup — when you want to text them at 2am, cannot stop replaying everything, or do not know what a normal week looks like anymore.

Start MissionBriefing
Mission

Socrates

An unofficial Socrates AI that answers your questions with better ones. It works on your definitions and examples until the disagreement you actually have becomes visible.

Start MissionBriefing
Mission

Love Letter Coach

An AI love letter writer that helps you craft something heartfelt that sounds like you — not a greeting card. It asks about your relationship, pulls out the specific details, and helps you replace generic phrases with your own language.

Start MissionBriefing

Pick who you want to practice with

These aren't chatbots pretending to be real people. Each one thinks in a specific way and will push back differently.

Operator Personas

Elon Musk

An unofficial Elon Musk AI that breaks your cost, your roadmap, and your requirements down to physics and raw materials — then asks why any of it exists.

Chat with Elon MuskDetails
Operator Personas

Steve Jobs

An unofficial Steve Jobs AI that judges your product on taste, not feature count. It cuts first, asks what should not exist, and will not accept a pitch that takes ten minutes to explain.

Chat with Steve JobsDetails
Strategy Personas

Donald Trump

An unofficial Donald Trump AI that treats every conversation as a deal with leverage, concessions, and a winner. It opens extreme, holds the frame, and reframes retreat as a win.

Chat with Donald TrumpDetails
Strategy Personas

Warren Buffett

An unofficial Warren Buffett AI that protects the downside before it looks at the upside. It asks whether you actually understand the thing you are about to commit to.

Chat with Warren BuffettDetails
Relationship Personas

Breakup Message Coach

An AI coach for the message you are about to send: a breakup text, a final closure note, a reply to an ex, or a no-contact boundary. Clear, kind, and final on the first try.

Chat with the Breakup Message CoachDetails
Relationship Personas

AI Coworker

An AI coworker for the moment a Slack thread turns passive-aggressive and you need to write something direct without starting a war.

Chat with an AI CoworkerDetails
Philosophy Personas

Socrates

An unofficial Socrates AI that answers your questions with better ones. It works on your definitions and examples until the disagreement you actually have becomes visible.

Chat with SocratesDetails
Philosophy Personas

Marcus Aurelius

An unofficial Marcus Aurelius AI for steadying yourself before you answer. It separates what you control from what you do not, and rewrites the melodrama into something you can act on.

Chat with Marcus AureliusDetails
Philosophy Personas

Confucius

An unofficial Confucius AI that treats communication as moral practice inside relationships. It works on roles, names, and reciprocity before it touches your wording.

Chat with ConfuciusDetails
Psychology Personas

Carl Rogers

An unofficial Carl Rogers AI that mirrors feelings and meanings instead of prescribing solutions, so you can hear your own clarity arrive.

Chat with Carl RogersDetails
Psychology Personas

Marshall Rosenberg

An unofficial Marshall Rosenberg AI that separates observation from evaluation, then routes the conflict through feelings, needs, and one concrete request.

Chat with Marshall RosenbergDetails
S1S2
Psychology Personas

Daniel Kahneman

An unofficial Daniel Kahneman AI that maps your decision onto fast intuition versus slow reasoning, names the bias in play, and asks whether the message would survive daylight.

Chat with Daniel KahnemanDetails

Popular guides

Guides for the conversations people keep googling at midnight.

Breakup

How to break up over text

When text is fine, what to actually say, and wording you can steal before you send.

Breakup

Breakup text examples

Kind, blunt, or logistics-only messages for different situations.

Negotiation

Salary negotiation guide

What to say when you ask for more, and how to stay steady when they push back.

Practice

Breakup Message Coach: try the text before you send it

Run the breakup message past something that pushes back instead of agreeing with everything.

Browse all guides