Other agents just click through. Echo's agents live inside real personalities and tell you, in their own words, whether they actually enjoyed what you built. Then chat back with them - ask what they thought of your CTA, have them rank your features, dig into any reaction you don't understand.
You spent months on this. Your friends said "it's cool." Real strangers open it, stare for six seconds, and don't get it. Now what?
Any public URL - a landing page, a web app, a browser game.
Presets or fully custom. Age, patience, motivation, attention span.
Each persona uses the product independently, in character, unsupervised.
One aggregated verdict, plus a full emotional trace per agent. Then ask any agent follow-ups in-character.
What did each persona think it was? Who did they think it was for? Where did the mental model break?
Where each persona hesitated, got confused, got stuck, or hit an obviously unnecessary step.
Whether the benefit clicked, what they'd actually pay for, and where the value proposition lost them.
Reports answer the questions you thought to ask. The chat answers the ones you didn't. Every agent stays in-persona after the run - grill them, rank features with them, test a copy change, sanity-check your next idea.
"Honestly? Six seconds in I still thought this was a newsletter tool. Lead with the emotion graph - that's the thing I'd screenshot."
Simulated persona reactions with an emotional trace, plus a chat with every agent after the run. Not proof of fun - a fast, honest first read.
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