Write prompts
to
Your AI is only as good as your prompt. Write, score, and save prompts that deliver results every time.
Why we exist
The AI isn't the problem.
Your prompt is.
Most people blame the AI when results fall short. But the truth is, AI is only as good as what you ask it. A vague prompt gets a vague answer. A sharp, well-structured prompt gets something you can actually use.
We built Promptheus so anyone, not just experts, can write prompts that consistently get great results.
Try it freeGeneric, off-target, unusable.
Exactly what you needed, first try.
Meet Atom
Your AI, built for prompt work. Atom writes, refines, and scores your prompts so you never start from scratch.
Everything you need to engineer better prompts
One platform to write, analyze, organize, and collaborate on prompts that get results.
AI-Powered Workspace
Chat with Atom, our own AI built for prompt work. Get real-time responses, use your voice, and see results formatted beautifully.
Prompt Scoring
Get scored on clarity, specificity, structure, tone, and more. Actionable suggestions included.
Prompt Library
Save and organize prompts into color-coded collections with tags, search, and one-click copy.
Templates
Turn prompts into reusable templates with dynamic placeholders. AI detects variables automatically.
Marketplace
Discover and share prompts with the community. Browse by category, model, and use case.
Browser Extension
Stop switching, start prompting.
No more switching tabs. The Promptheus extension lives in your browser and surfaces exactly when you need it: your saved prompts, right on top of whatever you're working on.
How it works
Write
Open the workspace and describe what you need. Atom, our AI, writes the prompt for you from scratch.
Refine
Get an instant quality score with a breakdown of what's working and exactly what to improve.
Share
Save to your library, turn it into a reusable template, or publish it to the community.
What people are saying
Built for the way you work
"
Promptheus cut the time I spend refining prompts in half. The scoring feature alone is worth it.
Alex Chen
AI Engineer
"
Our whole team works from the same prompt library now. We finally have consistency across everything.
Sarah Kim
Product Manager
"
I used to rewrite the same prompts constantly. With templates and Atom, those days are gone.
Marcus Webb
Content Strategist
Pricing
One plan. Everything included.
Try free for 7 days, then $5/month. Cancel anytime.
Start free for 7 days.
Your card won't be charged until the trial ends.
Cancel anytime. No questions asked.
Everything included
Unlimited prompt history
Never lose a prompt again
Chat with Atom AI
Write, refine, and score instantly
Prompt library & templates
Organise and reuse what works
Browser extension
Access prompts anywhere
Priority AI responses
Faster, no queue
Early access
First to get new features