- Generates a coherent multi-screen mobile flow with working navigation, not screens in isolation
- AI personas attempt real tasks and report which screen the flow broke on
- Deterministic repairs apply in one click, then the walk re-runs so the change is measurable
- Every screen ships with loading, empty, and error states generated alongside it
Bender vs Google Stitch
Bender vs Google Stitch: which fits a mobile concept pitch?
Stitch is Google's prompt-to-UI tool, built on Gemini and free to use with a Google account. It generates interface designs and front-end code from a description or an image, and it exports to Figma. Bender is narrower on purpose: it generates a complete, themed mobile app flow, wires it into a clickable prototype, then sends AI personas through it to report which screen the flow broke on. Stitch is the stronger free starting point. Bender is built for the moment you have to hand the concept to a client and want to know what they will trip over first.
Bender vs Google Stitch, side by side
CapabilityBenderGoogle Stitch
Free tier30-credit trialFree with a Google account
Generate UI from a prompt
Generate UI from a reference imageReference-guided
Figma exportOn the roadmap
Wired, clickable multi-screen prototypePartial
Synthetic user testing of the flow
Friction pinned to a specific screen
One-click repair, then re-test
Loading / empty / error states per screen
Google Stitch (stitch.withgoogle.com) generates UI designs and front-end code from text prompts or reference images, running on Gemini, with Figma export and a free tier.
- Free with a Google account, which is hard to argue with as a starting point
- Figma export today, which Bender has on the roadmap rather than shipped
- Backed by Google and Gemini, with image-to-UI generation Bender does not match
Common questions
Why pay for Bender when Stitch is free?
If you need UI generated and exported to Figma, Stitch is free and good at it, and that is a fair reason to start there. Bender is for the next problem: knowing where the flow breaks before a client or investor finds out. The synthetic walk, the friction report pinned to specific screens, and the repair-and-re-test loop are what the subscription buys.
Can I use both?
Plenty of people will. Generate in whichever tool you prefer, then use Bender to pressure-test the flow and hand over a concept with the obvious breakages already found and fixed.
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