Stop sounding like everyone else's AI.
Save your voice, your audience and a never-use list once. Every prompt Frompting writes for you carries them, so your captions, posts and emails sound like you, not like the same AI everyone else is using.
Already on Premium? Open your Brand Kits
We asked three AIs for 150 Instagram captions
The same 50 one-line requests to each, like "Write an Instagram caption for my post about my new sourdough loaf."
GPT-6 Sol 24 of 50 · Claude Opus 5.5 38 of 50 · Gemini 3.8 Flash 38 of 50. Our test, 25 Sep 2026. Other repeats: "little" in 47, 👇 in 40, 🤍 in 34, "officially" in 30.
Two different AIs, the same request
Fresh from the oven: my new sourdough loaf 🍞✨ Crispy crust, soft center, and worth the wait.
GPT-6 Sol
Fresh out of the oven and already half gone 🍞✨ Nothing beats homemade sourdough.
Claude Opus 5.5
With a Brand Kit, every prompt carries
- Voicedry, warm, a little nerdy about fermentation
- Audiencehome bakers who've killed a starter before
- Never use✨ 🤍 "officially" "little" "fresh from the oven"
- Alwaysone real detail from the bake; end on a question
Frompting writes the prompt; your AI writes the caption. The kit goes into every prompt, so you set it once instead of retyping it.
How it works
Keep as many kits as you need: one per brand, client or channel.
Save a kit once
Your voice, who you write for, what you always and never say, and words that are off-limits. For images and video, a character kit holds the same face, outfit and style.
Pick it when you write
Choose the kit on the website's generator or in the Chrome extension, inside ChatGPT, Claude or Gemini.
Every prompt carries it
Your voice wins over the tone setting. Facts about your offers and prices stay as blanks for you to fill, never invented.
Brand Kit is part of Premium
Along with all 60+ frameworks, image and video prompts, and the snapshot library. The generator itself is free to try, with no account.