Harth

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 models from Revit, Archicad, SketchUp, and IFC while preserving elements and coordinates. Its roughly 40 discipline-specific agent skills address areas including structure, envelope, interiors, and analysis. For site context, Harth supports 3D satellite terrain, surrounding-building imports, site-boundary tracing, geolocation, and sun studies. Users can render a model view, apply area masking and lighting presets, and upscale images for print. Teams can work simultaneously with live cursors, presence, threaded comments pinned over 3D, and per-project voice. Harth also lists PDF, image, and 3D exports, 360-degree views, and recorded walkthroughs. It can turn 360-camera footage into an explorable, measurable 3D scan, processed in one to two days. All plans include the full workspace and differ in AI usage, with monthly credit allowances and optional credit packs. The Free plan includes 700 credits per month; Plus costs $59 per month and includes 5,000 credits per month.

Harth combines architecture project work, model collaboration, visualization, and AI usage in a browser workspace. Plans include the full workspace, while credit allowances and support levels vary by plan.

Harth is aimed at architecture practices, particularly firms of roughly 15 to 30 people in New Zealand, Australia, and the United States. It may suit teams working with supported CAD models and shared project presentations.

Harth is a browser workspace for architecture practices that brings model coordination, site studies, visualization, collaboration, and building-data AI into one project environment. It suits practices of roughly 15 to 30 people that want shared project context rather than a rendering app alone. The main decision is whether its credit-based AI allowances match the team’s workload and budget.

Overview

Harth is designed around an architecture practice’s project model. Revit, Archicad, SketchUp, and IFC imports retain elements and coordinates, so teams can bring current work into the workspace instead of rebuilding it. Because every plan includes the full workspace, choosing a tier is primarily a decision about AI capacity, rendering priority, and support.

The browser delivery favors distributed teams in New Zealand, Australia, and the United States, the practice sizes Harth targets. It is a stronger fit for firms wanting one shared place for design studies, review, presentation, and coordination than for someone seeking a narrowly focused image generator.

Key features

Models, site and AI

Harth describes roughly 40 discipline-specific agent skills covering structure, envelope, interiors, analysis, and related building work. That breadth can put specialized assistance alongside the model, but credits are consumed as those capabilities are used; the plan does not unlock different workspace features.

Site context includes 3D satellite terrain, surrounding-building import, site-boundary tracing, geolocation, and sun studies. These tools make early site and massing review part of the same environment, rather than a separate mapping workflow. Practices focused only on final renders may find this scope unnecessary.

Visualization and capture

Users can frame a view in the model, mask areas, apply lighting presets, and upscale images for print. Harth also says 360-camera footage can become an explorable, measurable 3D scan, with processing taking one to two days. That is useful for documenting existing conditions, but the stated turnaround matters when a project needs immediate capture.

Collaboration and output

Simultaneous model work, live cursors, presence, threaded comments pinned over 3D, and per-project voice support reviews that stay attached to the project context. Exports include PDF, images, and 3D files, plus 360-degree views and recorded walkthroughs, giving teams several presentation routes beyond a static image.

Harth’s privacy policy addresses New Zealand and Australian privacy law and GDPR rights for EU and UK individuals. It also says prompts and generated outputs may be stored for improvement and quality assurance, with anonymized or aggregated prompt data used to develop and train its AI systems. Practices handling sensitive project information should account for that data use.

Pricing

Harth uses a freemium model with a free trial. All plans contain the full workspace; monthly credit allowances determine AI usage, and credit packs can be added when needed.

Free is appropriate for evaluating the workspace or running light AI use, but 700 monthly credits and community-only support limit it for an active practice. Plus is the practical starting point for a small team that needs 5,000 credits, faster rendering, and email help. Pro is aimed at heavier production with triple the Plus allowance and priority support. One-time packs suit teams with irregular demand or a temporary surge: their credits do not expire, but they do not provide a recurring monthly allowance or a higher support level.

Platforms

Harth runs on the web. Its supported model inputs are Revit, Archicad, SketchUp, and IFC, making it relevant to practices using those formats without requiring a desktop installation.

Who it's for

Choose Harth if your architecture practice wants design, site context, model-based visualization, AI assistance, and team review connected in a shared browser project. The collaboration tools are especially relevant when several people need to comment or work in the model at once, while the import support favors firms with established BIM or SketchUp files.

Look elsewhere if your requirement is only inexpensive image generation, if your workload cannot tolerate one-to-two-day reality-capture processing, or if project policy does not permit prompts and outputs to be retained for service improvement.

Pros and cons

Pros

• Full workspace on every tier: moving from Free to paid increases AI capacity rather than removing core project tools.
• Broad model compatibility: Revit, Archicad, SketchUp, and IFC imports preserve elements and coordinates.
• Architecture-specific scope: site studies, discipline-focused agents, 3D comments, and presentation exports cover more than rendering.
• Flexible credit purchasing: packs never expire, which helps with uneven project schedules.

Cons

• AI is quota-driven: credits, not feature access, are the principal constraint and can require extra purchases.
• Support varies by tier: Free has community support, while priority assistance starts at Pro.
• Data-use considerations: prompts and outputs may be stored and used in anonymized or aggregated form to improve and train AI systems.
• Capture is not instant: stated 360-scan processing takes one to two days.

Alternatives

AI Architectural Rendering Software is the broader list to consult when comparing dedicated rendering tools.

Luw.ai Studio is a lower-cost choice for iOS, macOS, and web users who want a 2-credit daily free allowance, with watermarking and 512×512 output on its Free plan; it is not a substitute for Harth’s architecture workspace.

Empoli is worth considering for iOS and web users seeking a free 30-day trial of an alternative workflow.

Gendo suits web users who prefer a Free plan with one active canvas, up to 50 assets, one collaborator, and watermarked generations.

Rendero is a web alternative with a one-time 50-credit Free allowance and paid per-person tiers.

Treform is the alternative for macOS, web, and Windows users who want editing and rendering plans, including a student quarterly option.

Blue Moon AI offers web-based daily free generations and several paid tiers with pricing not stated.

PLANA is a paid-oriented option with a seven-day, no-card trial and 4K, all-model output during its Max trial.

Renderica is a web and API alternative whose Free plan provides three renders per month at 1024px, with paid plans adding capacity and resolution.

Verdict

Harth is a strong choice for 15-to-30-person architecture practices that want model imports, site analysis, visualization, collaboration, and AI agents in one browser workspace. Choose it for the connected workflow and the fact that paid plans retain the full feature set; look elsewhere if you need only a renderer, tighter AI-data restrictions, or more predictable usage costs than credit allowances provide.