Tuuli vs Helonic: AI Drawing Review Compared

Tuuli and Helonic are two of the most directly comparable tools in AI construction drawing review. Both are AI-first products that read 2D PDF drawing sets with no BIM model required, both cite every finding back to the exact sheet and location with a severity rating, and both integrate with Procore. If you are evaluating one, you should probably evaluate the other.

The real difference is philosophical: what should the AI check against? Helonic has built an impressive generic analysis engine with deep code-compliance tooling, aimed largely at contractors, estimators, and plan reviewers. Tuuli is built on the belief that the most valuable checks are the ones specific to your firm, learned from your own RFI and change order history, and is aimed first at the design firms producing the documents. This comparison lays out both honestly.

What they share

• AI review of 2D PDF drawing sets, no BIM or 3D model required

• Detection of coordination conflicts, missing information, and cross-document discrepancies

• Findings cited to the exact sheet and location, with severity ratings for prioritization

• Procore integration

• Results designed for human verification, not blind trust

Where Helonic is strong

Helonic, a Y Combinator-backed company, has built a fast and well-packaged analysis product. It reports analyses completing in around 30 minutes for typical sets, cross-references pages across ten issue categories, and places issue clouds directly on the drawings at exact coordinates. Its one-click RFI generation, which pushes formatted RFIs into Procore or Autodesk Construction Cloud with code references attached, is genuinely slick for contractor workflows where the output of review is an RFI to the design team.

Its code-compliance tooling is a real differentiator: full-text search across IBC, IRC, NEC, and IPC, custom rule packs for jurisdiction-specific amendments, and a large library of free construction reference guides. Helonic publishes usage stats including 1,000+ reviews completed, 100,000+ pages analyzed, and $30M+ in estimated rework prevented (its own figures; treat vendor stats from any company, ours included, as claims to verify).

Its center of gravity is the contractor side: estimators running pre-bid risk reviews, preconstruction teams hunting scope gaps, and plan reviewers. If your job is to find problems in someone else's documents and turn them into RFIs or bid qualifications, Helonic is built around exactly that loop.

Where Tuuli is different

Tuuli starts from a different observation: generic analysis, however good, catches the mistakes every project makes. It cannot catch the mistakes your firm makes, because those are not in any code book or generic rule set. They are in your RFI logs and change orders. Our analysis of the most common errors in construction documents, drawn from more than 10,000 real RFIs, found that error patterns are strongly firm-specific, driven by each firm's templates, standards, and workflows.

So Tuuli ingests your firm's historical project data, past RFIs, change orders, and internal standards, and checks every new set against both general QC rules (65+ document hygiene checks across drawing sets, schedules, callouts, and cross-discipline coordination) and the specific patterns your projects tend to repeat. The longer you use it, the more tailored the review becomes. That compounding is the core of the product.

Tuuli is also architect-first. Helonic grew up serving the people reviewing documents produced by others. Tuuli is designed for the architecture and engineering teams producing them, running internal QA/QC before a set goes out for permit, pricing, or construction. For a design firm, the goal is not to generate RFIs; it is to issue sets that never trigger them. That difference in purpose shapes everything from what gets flagged to how findings are framed.

How to choose

Choose Helonic if you are a GC, estimator, or plan reviewer whose workflow ends in RFIs or bid qualifications, you value deep code search and jurisdiction rule packs, and you want a fast generic analysis across someone else's documents.

Choose Tuuli if you are a design firm running internal QA/QC, you want the review to learn your firm's specific failure patterns rather than apply generic rules alone, and you care about a tool that gets sharper on your work with every project you feed it.

And as always in this category: do not decide off marketing pages, including this one. Run a real project you know well through both, ideally one where you already know what went wrong, and compare the findings lists. For the broader field, see our guide to the best AI construction drawing review software in 2026.

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 Helonic as of June 2026 and is intended to be fair to both products. Helonic's published figures are its own claims. Verify current details, packaging, and pricing with each vendor.