Tuuli vs Firmus (Bluebeam): AI Design Review Compared

Firmus built its name as a preconstruction AI design review platform: upload a 2D PDF drawing set, and its AI flags missing information, scope gaps, and cross-discipline inconsistencies before they become field problems. Tuuli works on the same core problem, catching document issues before construction, but takes a different approach to what the AI looks for and who it serves.

There is also a major recent change that anyone evaluating Firmus should know about. In September 2025, Bluebeam, a Nemetschek Group company, acquired Firmus. Firmus is now being integrated into Bluebeam's PDF review and markup workflows, with its capabilities rolling into the new Revu Max product. That changes the calculus for buyers in both directions, and we will cover it honestly below.

What they share

• AI review of 2D PDF drawing sets, no BIM model required

• Detection of missing information, scope gaps, and cross-discipline coordination issues

• Findings designed for human verification, pointed back to the source sheets

• The same goal: catch document problems in design or preconstruction, when they are cheap to fix

Where Firmus is strong

Firmus earned real traction with general contractors and preconstruction teams. Its AI-REVIEW product focuses on the precon use case: scan a drawing set ahead of bidding, surface design-related risks, and help estimators bid more accurately with fewer surprises. It also offers drawing set comparison between revisions, which precon teams use to quickly see what changed between issues.

The Bluebeam acquisition adds another dimension. If your team already lives in Bluebeam Revu, Firmus capabilities arriving inside that environment means AI review with no new tool to adopt. Bluebeam has enormous reach in North American AEC, and for many firms, AI features showing up inside software they already license is the path of least resistance.

What the acquisition changes

An acquisition like this cuts both ways, and it is worth thinking through honestly.

On the plus side: more resources, a larger engineering organization, and distribution through one of the most widely used document tools in construction.

On the other side: Firmus is no longer an independent product with its own roadmap. Its direction is now tied to Bluebeam's product strategy and release cycles, and its capabilities are being repackaged into a broader suite. Standalone access, pricing, and the pace of improvements all become questions to ask the vendor rather than assumptions you can make. For firms that wanted a focused, fast-moving design review tool, that focus now belongs to a much larger organization with many priorities.

Where Tuuli is different

Tuuli was built around a specific belief: quality control is a learning problem, not a checklist problem.

Most AI review tools, Firmus included, check drawings against general rules: coordination logic, completeness checks, common discrepancy patterns. That catches the mistakes every project makes. But every firm also has its own recurring issues, and those live in the firm's history, in past RFIs, change orders, and internal standards, not in any generic rule set. Our analysis of the most common errors in construction documents, drawn from more than 10,000 real RFIs, shows just how firm-specific those patterns are.

Tuuli ingests that history. It learns from your firm's past RFIs and change orders and checks every new set against both general QC rules and the specific patterns your projects tend to repeat. The detail that always draws a field question. The spec-to-drawing mismatch that cost you on a past job. The coordination gap that shows up in project after project. The longer you use it, the more tailored the review becomes to how your firm actually works.

Tuuli is also built architect-first. Firmus grew up serving general contractors and precon teams evaluating someone else's documents. Tuuli is designed for the firms producing the documents: architecture and engineering teams running internal QA/QC before a set goes out for permit, pricing, or construction. That is where document errors are cheapest to fix, and where preventing them protects the firm's reputation and fee.

How to choose

Choose Firmus via Bluebeam if your team already standardizes on Bluebeam Revu, your primary use case is preconstruction risk review on the GC or owner side, and you prefer AI capabilities bundled into a suite you already license.

Choose Tuuli if you are a design firm running internal QA/QC, you want a review tuned to your own firm's history rather than generic rules alone, and you value a focused product whose entire roadmap is document quality control.

And as with any tool in this category, the best evaluation is a real one. Run a project you know well through the tool and see what it catches, especially the issues you already know your teams tend to produce. For the wider field of options, see our guide to the best AI construction drawing review software in 2026, or our comparison of Tuuli vs Buildcheck.

Try Tuuli on a real set

Tuuli offers a free initial review: send a real project and see the findings, cited to the sheet, including issues drawn from your own project history. Get a free review.

This comparison reflects publicly available information about Firmus and Bluebeam as of June 2026 and is intended to be fair to both products. Verify current product details, packaging, and pricing with each vendor.