Product comparison · checked August 31, 2026
RoarCAD vs Flux.ai vs Quilter
These products overlap, but they solve different jobs. Flux is broad browser ECAD, Quilter automates physical layout, and RoarCAD focuses on inspectable agent changes, immutable review handoff, and human approval.
| Product | Best fit | Starts with | Distinct strength | Important boundary |
|---|---|---|---|---|
| RoarCAD | Small teams that want a transparent agent and revision workflow | Requirements or a structured BoardGraph | Four bounded WebMCP tools, non-mutating previews, human-only apply, tamper-evident checkpoints | Not a proven replacement for professional ECAD or physical verification |
| Flux.ai | Teams wanting a collaborative, end-to-end browser ECAD | An idea, requirements, or an editable project | Planning, schematic/BOM work, layout, manufacturing output, component data, and real-time collaboration | A broader commercial product with subscription and AI-credit pricing |
| Quilter | Engineers automating placement and routing of an existing design | A prepared schematic, board file, and constraints | Multiple physics-driven candidates, checks, and native ECAD return files | It is primarily layout automation, not requirements-to-schematic collaboration |
Choose by the bottleneck
- Choose RoarCAD when the main risk is trusting and handing off agent-made changes.
- Choose Flux when you want a mature browser design environment with collaboration across the broader PCB workflow.
- Choose Quilter when you already have the electrical design and need to compress placement and routing time.
What this comparison does not claim
RoarCAD does not claim feature parity with Flux, physics-validation parity with Quilter, or evidence that PocketRoar is ready to fabricate. Competitor descriptions come from their official product pages and may change; follow the linked sources for current details.
RoarCAD’s differentiator: the agent has useful tools but no tool that can approve its own change. A person sees the diff and creates the next immutable revision.
See the safety workflow, free/open-source details, or try RoarCAD.