Usability tests moderated by Koji,
at the scale of a survey
Give participants a task on your site or prototype. Koji stays with them by voice or chat, records their screen and voice, and asks the follow-up questions a good moderator would. You get success rates, time on task and the moments that matter, without scheduling a single session.
Example study: a participant inviting teammates in Acme's team settings, with Koji alongside.
Why usability tests
What people say and what they do are different things
Interviews tell you what people think they do. Analytics show clicks without the reasons. A moderated session shows both, but takes weeks to schedule and an afternoon per participant. Koji moderates every session at once, so you see the struggle and hear the why at the scale of a survey.
Moderated sessions, the usual way
- Weeks of scheduling for a handful of sessions
- A moderator in every call, and hours of video to review
- Findings that depend on who ran the session
- Five participants, so no numbers you can compare
A usability test in Koji
- Participants take the test whenever suits them, in parallel
- Koji moderates and asks the same probing follow-ups each time
- Clips of the key moments, cut for you
- Success rate and time on task across every participant
Capabilities
Everything a moderated session gives you, without the sessions
One question type that moderates, records, measures and highlights, in every interview at once.
Moderates every session
Koji gives the task, stays with each participant by voice or chat, and never leads them to the answer.
Records screen and voice
Think-aloud and on-screen behavior in one recording, so every hesitation comes with the reason.
Follows up on what happened
Questions about the participant's own attempt: where they paused, what they expected, whether it worked.
Measures success and time
Who finished, who got stuck and the median time on task, across every participant.
Cuts the moments that matter
Koji watches each recording and clips the key moments, each with a note on why, ready to share.
Works on any page with a link
Live sites, staging builds, web apps and prototypes, in over 30 languages, with nothing to install.
In the product
A moderator, a recorder and an analyst in one question type
Your real product, with Koji alongside
Pages that allow it open right inside Koji as a screen, with the address always visible. Pages that don't, such as login flows, open in a new tab with Koji in a small floating window.
- Live sites, staging builds, web apps and prototypes with a link
- Voice or chat, in over 30 languages
- Nothing for participants to install
Think-aloud, recorded with the screen
Participants share their screen and talk as they go. Koji records both together, so every hesitation comes with what they were thinking. Recording is optional for the participant, and the task still counts if they skip it.
- Screen and voice in one recording, desktop browsers
- Clear “I'm done” and “I'm stuck” for each task
- Koji won't end the interview while a task is open
Your task
Invite two teammates and make one of them an admin.
app.acme.com
The page opens right here. Koji records this tab and your voice while you try it.
Follow-ups about what actually happened
Once the task ends Koji asks about it, in the same view. Questions are about the participant's own attempt: where they paused, what they expected, how confident they are that it worked.
Results you can act on, and clips you can share
Koji reads each attempt for the outcome and time on task, then watches the recording and cuts the moments that matter, each with a note on why. Play them all in one reel, or open a participant to see their full session.
- Finished, stuck and median time per task
- A reel of key moments, with thumbnails and Play all
- Full recording pinned on every participant
Task 1
Invite two teammates and make one of them an admin.
Finished
14 of 20
70%
Stuck
6
30%
Median time
2:14
Moments that matter
Play all · 1:09Looks for roles in the invite form
Misses the role menu on the member row
Finds it, checks the badge changed
Part of a study, not a separate tool
A task is a question type. Ask a few questions about the participant, run two or three tasks, and close with a rating or a price test. Everything lands in one report, so you can see who struggled and why.
Task
BetaWhat to try
Invite two teammates and make one of them an admin.
Task page
https://app.acme.com/settings/team
This page can open inside Koji
Business cases
Where teams use usability tests
Anywhere a flow decides whether people stay, buy or get value.
Onboarding and sign-up
Find where new users hesitate or drop before they reach the first moment of value.
Checkout and conversion
Watch real buyers go from basket to payment and hear what makes them doubt.
Before you ship
Test a staging build or prototype with real users while changes are still cheap.
Benchmarks and competitors
Give the same task on your site and a competitor's, and compare success and time on task.
After a redesign
Run the same task before and after a change to show whether it really got easier.
Agencies and UX audits
Deliver evidence-backed audits with clips and success rates, without a lab or a moderator per session.
Trust and privacy
Built for participants as much as for you
Screen recording only works if people are comfortable with it. Koji is clear about what is recorded, and lets participants say no.
Always visible
Participants see when the screen is recorded, and choose the window or tab they share.
Opt out, still take part
“Skip, don't record” keeps the participant in the study. Their task and answers still count.
Private by default
Recordings are stored privately and only your workspace can watch them.
Never used to train models
GDPR-compliant with EU data residency. Your recordings are never used to train AI models.
A usability test where Koji plays the moderator. It gives the participant a task, stays with them while they try it, records their screen and voice, and asks follow-up questions about what happened. You get the depth of a moderated session without scheduling or running one.
See where people struggle.
Hear why, today.
Add a task to any study and send it to your users or our panel. Usability testing is in beta and available on every plan.
EU data residency · GDPR-compliant · never used to train models