Proto-Mind vs sleek.design: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Proto-Mind and sleek.design — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
Proto-Mind
VIRENCORE
A native macOS floating workspace that keeps AI conversations, project memory, files and live voice together on your Mac.
Key features
- Floating Cube Workspace: Hover the cube to reveal the workspace and click to pin it, or move away to hide it while tasks keep running in the background.
- Per-Conversation Model Routing: Each chat picks its own model and account — ChatGPT with Codex access, supported model APIs, or a local Ollama model.
- Editable Project Memory: Notes, decisions and preferences stay attached to a project and carry into later conversations, and you can review, change or remove any of them.
- Live Voice Control: Speak to open a project, steer a running task or send new work, and add a correction while the task is still going.
- Detachable Companion Windows: Pull out and resize a browser, a file or a second conversation so reference material sits beside the work.
- Explicit Mac Access: Codex can work with files and run commands only after you turn Mac access on; screen control additionally requires Codex Desktop's signed Computer Use helper.
- Local Data Storage: Conversation history and saved memory live on your Mac, and cloud processing happens only when you choose a cloud model or voice.
- Open Source Beta: The macOS installer and the Apache 2.0 source are both published, so the workspace can be inspected and built from source.
Best for
- Long-Running Project Work: Keep a website or client project's decisions in project memory so each session resumes instead of re-explaining the brief.
- Brief to Deliverable: Have the agent read a client brief and save a proposal document, then open it in a companion window next to the conversation.
- Parallel Task Execution: Start several tasks across different models at once and check back on them without blocking the conversation you are in.
- Hands-Free Steering: Dictate a correction or open a project by voice while your hands are busy elsewhere on the Mac.
- Privacy-Sensitive Drafting: Run a local Ollama model so conversation content never leaves the machine.
- Model Comparison: Put the same question to a Codex route and a local model in adjacent windows to compare the answers side by side.
sleek.design
Sleek
AI-powered mobile app mockup generator that creates iOS and Android app designs instantly without a designer.
Key features
- Instant Mockup Generation: Converts text prompts or app ideas into polished iOS and Android screen designs within seconds, enabling rapid visualization of concepts.
- Cross-Platform Output: Produces both iOS and Android style mockups, ensuring platform-consistent layouts and components for each target OS.
- Chat-Based Iteration: Supports iterative refinement by allowing users to refine designs through conversational inputs, speeding up the design iteration loop.
- Figma & Code Export (Export Capability): Provides options to export designs to Figma or generate developer-friendly assets/code snippets for easier handoff (noted in third-party sources).
- Template and Variation Generation: Generates multiple layout variations and templates from a single idea to explore alternative UI directions quickly.
- No-Designer Workflow: Enables non-designers to produce high-quality app screens without hiring a designer, reducing time and cost in early-stage prototyping.
- Generate mobile app mockups from text prompts or ideas
- Support for iOS and Android screen designs and templates
- Chat-driven iteration to refine designs interactively
- Export designs to Figma
- Export design assets or code (export to code mentioned)
- Web-based interface — no local installation required
- Aimed at rapid prototyping and eliminating need for a dedicated designer
- Free access / Freemium availability as indicated on site
- No public API or official documentation referenced in provided content
Best for
- Early Concept Validation: Founders and product managers can turn an app idea into visual screens instantly to validate concepts with stakeholders or users.
- Rapid Prototyping for MVPs: Teams can generate initial screen designs for minimum viable products to accelerate development planning and user testing.
- Design Iteration without Specialists: Non-designers can iterate UI layouts and copy via chat-driven refinements to explore multiple directions quickly.
- Handoff to Engineering or Designers: Exported Figma files or code snippets streamline collaboration by providing ready assets for developers or detail work by designers.
- User Testing and Feedback: Create varied screen versions quickly to run A/B tests or user interviews to collect early usability feedback.
- Rapidly create UI screens and prototypes from product ideas
- Iterate on app visual designs with non-designers via chat
- Export screens to Figma for further design work or handoff
- Generate starter code or assets for developer handoff
- Create demo screens for pitches, user testing, or stakeholder reviews