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Contrat.io is a document review and approval collaboration platform for architecture, engineering, construction (AEC), and EPC project teams. It focuses on solving Comment Review Sheet (CRS) workflows in technical document reviews, including routing, comment closure, revision tracking, and approval audit trails. It brings PDF documents, annotations, threaded discussions, statuses, revisions, and approvals into a single cloud workspace, reducing version confusion caused by repeated exchanges of Word files, Excel sheets, attachments, and emails.
The platform lets teams upload technical PDF documents and launch review workflows based on those files, inviting reviewers and authors while assigning roles. Teams can add contextual annotations, comments, and threaded replies within the document; reviewers can mark whether issues have been addressed; and authors can create revisions and lock in changes. The CRS table centralizes comments, replies, revisions, status, and approval information, and can be exported as PDF or XLS, making it suitable for engineering projects that require formal review records. Its industry positioning covers complex project scenarios such as infrastructure, transportation, energy, water, mining, and industrial facilities.
Pricing is relatively transparent. Collaborator is the free plan, allowing users only to access invited documents and review or approve them. Lite is €21.90/month and supports document uploads, with up to 10 documents, 5 users per document, 15 revisions, and a 20MB single-file limit. Professional is €54.90/month and increases the limits to 50 documents, 10 users per document, and 50MB per file. Enterprise is €76.90/month and supports up to 100 documents, unlimited users per document, unlimited revisions, and unlimited document size. All plans include a 30-day free trial with no credit card required.
The main advantage is that the product is tightly focused on AEC/EPC review workflows. It can replace manual CRS spreadsheets and email-based communication, while making comments and revisions traceable. Its export capabilities are also useful for archiving. The limitations are that publicly available information does not clarify third-party integrations, API access, SSO, granular permissions, compliance certifications, or data residency; security is only described as secure cloud file storage. The lower-tier plans’ limits on document count, user count, revisions, and file size may also be unsuitable for large projects.
Contrat.io is best suited for engineering consultancies, design institutes, contractors, project owners, and regulatory stakeholders reviewing drawings, technical submittals, contracts, change orders, and regulatory documents. Access from mainland China, supported payment methods, and Chinese-language support pages are not disclosed, so availability should be treated as unknown. If a project involves local compliance requirements, RMB payments, or private deployment, it is advisable to also evaluate domestic engineering collaboration, document management, and approval systems as alternatives.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on contrat.io official site.
contrat.io is an Unknown SaaS provider. TG4G tracks its product information, with monthly pricing from $24.00, an overall rating of 7.0/10, and a China-accessibility score of Workable. Click "Visit Official Site" to reach contrat.io directly.