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Test your website usability with realistic AI users

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Synthers AI simulation setup with an AI persona testing a website journey and identifying a UX issue.
Synthers AI dashboard showing AI personas running a booking journey and identifying five UX frictions.
Synthers AI journey results showing a completed booking task with a 65/100 score, medium risk, 29 steps, and AI persona results.
Synthers AI CLI execution example

Synthers AI

Micro-SaaS
-42%$49
$85
  • Lifetime access
  • Refundable up to 60 days
No "We Got Your Back" guarantee. Radar is a discovery engine — we don't vet these products, so this guarantee doesn't apply.
AppSumo's 60-day refund applies to most deals. AI skills are non-refundable once redeemed.
AppSumo Labs

Early-stage product. Brought to you by the team who built it.

Synthers AI replaces slow, expensive usability studies with AI personas that simulate complete user journeys on your website or Figma prototype. Define who the user is, what they want, and how they access your product, then watch the AI navigate it step by step, capturing hesitation, confusion, and drop-off points along the way. Results arrive in minutes, can be re-run continuously as your product evolves, and integrate directly into dev tools like Claude Code, Cursor, and GitHub Actions. It's built for teams who need to know how a design will actually perform before it reaches real customers.

TL;DR

  • checkmarkTest complete user journeys for usability in minutes
  • checkmarkSee how realistic AI personas behave, with real goals and frustrations

At-a-glance

synthers.ai

Alternative to

Hotjar

Integrations

Figma, GitHub, Claude, Cursor, Codex

Best for

Product designers, Product managers, Web designers

Simulate complete user journeys with realistic AI personas on websites and prototypes

Validate user journeys

  • Test entire user flows from entry point to goal completion or abandonment. See where users hesitate, get stuck, take alternative paths, or drop off.
  • Capture every interaction and decision along the way. Get a complete view of the experience, not just individual screens.
Validate user journeys

Create realistic AI personas

  • Define personas, goals, devices, locations, and access credentials. Test your product across the audiences and scenarios that matter.
  • Model frustration, confusion, trust, and confidence — not just clicks. Understand how different users actually experience the journey.
Create realistic AI personas

Get rich user insights

  • Customize questions during and after each simulation. Investigate specific moments and get deeper context behind the results.
  • Chat with the AI persona after the journey. Understand its decisions, reactions, and overall experience.
Get rich user insights

Integrate usability testing into your workflow

  • Connect Synthers with Claude Code, Cursor, and Codex via MCP. Bring usability validation into the tools your team already uses.
  • Run simulations from the CLI or GitHub Actions. Make user-journey testing part of your development and CI workflow.
Integrate usability testing into your workflow

Choose the plan that’s right for you

Feel secure in your purchase with AppSumo's 60 day money-back guarantee.

Starter

$49
Lifetime access
Included monthly credits$25
Seats1
Advanced questions (pre/during/post)No
Chat with AI personaNo
Export reports & journeysNo
Simulation schedulingNo
Dedicated IPNo
Priority supportNo

Professional

$149
Lifetime access

Professional Plus

$299
Lifetime access
Refundable up to 60 daysNot covered by We Got Your Back. Why?
Deal terms & conditions
Synthers AI
See Synthers AI
Founded February 1, 2025
🇩🇪Berlin, Germany
1-10
Startup
Bootstrapped
synthers.ai

Continuous usability validation with AI

As software development gets faster, teams can create and iterate on more product ideas than ever. But understanding how users will actually experience those products hasn't kept pace. Founded by Dmitrii Oreshko, Synthers AI is a direct response to that reality: bringing AI into product development in a way that is practical, fast, and grounded in how teams actually work. Synthers AI lets teams simulate realistic AI personas across complete user journeys on websites and prototypes. Designers and product teams can test different users, goals, and scenarios to uncover UX friction, confusion, and drop-off risks before real users do. Synthers AI helps teams validate the experience earlier and more often, without having to wait for real users to test every iteration.
Dmitrii Oreshko
Dmitrii OreshkoSee Dmitrii Oreshko on LinkedIn

What “Radar” means for this product

Learn more about AppSumo deals

Radar is home to early-stage products looking to gain traction. Here’s the lowdown of what these deals are and aren’t.

Where it is in its life

Radar products are at the start of their journey. They're fresh on the scene and building a customer base.

How we vouch for it

We've verified the basics and reviewed the listing for safety. Success isn't guaranteed — we haven't fully vetted every claim, feature, or result.

Code & security review

All AI skills are reviewed for security purposes. We do not review software code — partner owns security and what ships.

Refund policy

60-day refund on most deals. AI skills are non-refundable once redeemed.

Pricing

Prices are set by the founder. Simple as that.

Where you'll see it

The Radar section of our site exclusively. These products are in early discovery and not quite ready for the AppSumo limelight yet.

Radar is a discovery engine — because we aren’t vetting these products, our We Got Your Back guarantee doesn’t apply. Should these products show traction, our team will work with theirs to get them ready for the main stage (and protected).

Questions & reviews