GMprentice
Level up your GM skills in a risk-free sandbox.
GMprentice launched on January 3, 2026 with 6 votes, #2,272 of 14,584 launches that month and more than 75% of that year's launches.
What it does
GMprentice is an AI-powered rehearsal space for tabletop RPG Game Masters. Practise running encounters, rulings, pacing, and roleplay with a simulated adventuring party that reacts, argues, and surprises you. Build confidence, experiment safely, and sharpen your GM skills, before you ever sit at a real table.
Practice GMing with AI adventurers in a risk-free sandbox
Level up your GM skills in a risk-free sandbox. Create AI party members with unique personalities, run encounters, and watch emergent roleplay unfold. This is what running a session looks like. AI players respond, roll dice, and stay in character. Four ways to create characters - pick the method that fits your style. One click, instant adventurer. Perfect for jumping straight in when you just want to practice. Describe what you want and let AI craft a unique character complete with backstory and secrets. Paste a backstory or write freely. The AI will roleplay based on your narrative. Granular control with stats, traits, and goals. Ideal for testing specific party compositions. Everything…from gmprentice.app
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