Harth vs Rendero

Harth is a browser-based workspace for architecture practices to design, research, collaborate on, and present projects, with AI agents working on building data. It imports Revit, Archicad, SketchUp, and IFC models while preserving elements and coordinates. About 40 discipline-specific agent skills address areas such as structure, envelope, interiors, and analysis. For site context, it offers 3D satellite terrain, nearby-building imports, boundary tracing, geolocation, and sun studies. Users can render a model view, apply masking and lighting presets, and upscale images for print. Teams can work together using live cursors, presence, threaded comments pinned over 3D, and project voice. Harth also converts 360-camera footage into an explorable, measurable 3D scan, with processing stated at one to two days. Exports include PDF, image, and 3D files, 360-degree views, and recorded walkthroughs. All plans include the full workspace and differ by AI usage; monthly credits can be topped up with packs. Free includes 700 credits per month; Plus is $59 per month for 5,000 credits, and Pro is $149 per month for 15,000.

Rendero is a browser-based AI rendering and image refinement platform for architectural visualization. It helps design teams explore visual directions, materials, atmosphere, and presentation drafts from existing images rather than model files. Users can upload PNG, JPG, or WebP sketches, clay renders, exported model views, or other visuals. Automatic segmentation lets users select image regions for refinement and compare options. The site lists Nano Banana, Nano Banana 2, Nano Banana Pro, GPT Image 2, and Stable Diffusion, although model and resolution access depend on the plan. Rendero works alongside modeling tools: users export images from SketchUp, Revit, Rhino, ArchiCAD, Vectorworks, or Blender for use in the browser. The free plan gives a one-time 50-credit allowance that does not refill monthly. Paid plans start at $19/mo; Lite is $19 a month for 300 credits. Credit charges vary by model and resolution, some engines also account for processing time, and upscaling costs extra credits. Generated images may alter geometry or details, so they need review and are not technical or construction documents.