New users trying to complete one critical task
Ground the study in customer evidence relevant to this decision.
Sunzu for ux designers
Find the friction.
While it is still a design.
The design review is tomorrow. Explore where your audience may struggle, what they may misunderstand and which changes deserve attention before handoff.
Used by
- Insights analysts
- Product managers
- UX designers
- Marketing strategists
- Copywriters
- Go-to-market leads
- Growth managers
Trusted by
Backed by
- Microsoft for Startups
- NatWest Accelerator
The work in front of you
Make the next iteration count.
Use a focused usability report to decide what to change and what to investigate next. Bring the reasoning into your design review.
- UX testing
Review a critical journey
Focus a UX study on onboarding, an important action or a confusing decision, with a clear audience and task.
Explore ux testing - Concept testing
Compare the thinking behind two designs
Test alternative concepts to understand the expectations and trade-offs driving the design direction.
Explore concept testing - Depth interviews
Understand what sits behind the friction
Use depth interviews to explore the audience’s mental models, language and expectations.
Explore depth interviews
Your next study
Where could a first-time user get stuck?
Bring a real question. We’ll scope the audience, evidence and study together.
Start with what you have
Screens to review
Task and context
Audience evidence
From research to a decision
A focused brief for the next design iteration
Keep the question, the evidence and the next action connected.
Ask
Will a new user understand whether inviting a teammate is optional?
Examine
Look for ambiguity in the action labels, supporting copy and sequence. Review the audience evidence before treating a likely issue as a confirmed usability failure.
Act
Clarify the step, compare the revision and check task completion with real users.
Illustrative research brief. This is an example of how to use findings, not a completed customer study or a product screenshot.
Internal back-testing
UX testing. Measured against a human reference.
Sunzuin minutes75%
Human expert with AIin days34%
Research, 500+ humansin months100%
Sunzu internal back-testing. Research, 500+ humans is the reference set to 100%. This is a study-specific comparison, not an overall accuracy score or a guarantee for your study.
From our customers
Relied on by global experts
Director, Consumer Insights & Strategy
In just a couple of months, over 170 of our colleagues have run over 500 studies.
We’re now directly integrating audiences into many of our research, product and marketing workflows.
Director, Global Product and Design UX Research
In a market flooded with AI-generated noise, this was the first platform that genuinely earned our trust.
By grounding its models in research principles, behavioural science, and real customer data, it delivers insights that feel credible, transparent, and actionable.
It changed our perspective on what’s possible with AI in customer research.
A few useful answers
Before your first study.
No. Sunzu creates audience characters from customer evidence. UX studies explore likely friction; observed behaviour and task completion with real people remain part of your validation process.
No. Use dedicated accessibility checks and research with people with disabilities for accessibility evaluation. Sunzu’s UX benchmark concerns defects detected in a specific internal comparison.
Sunzu creates audience characters grounded in customer evidence and enriched with a behavioural corpus. They are simulations. Use findings to explore directions and sharpen questions; lived experience, unexpected behaviour and consequential decisions still need research with real people.