Simplify AEC Document Reviews
Contrat.io streamlines Comment Review Sheets (CRS) for Architecture, Engineering, and Construction teams - enabling faster approvals, clearer communication, and fewer revision cycles.
Contrat.io streamlines Comment Review Sheets (CRS) for Architecture, Engineering, and Construction teams - enabling faster approvals, clearer communication, and fewer revision cycles.
Built for the Way AEC Reviews Actually Work
Real-Time Collaboration
Architects, engineers, and contractors review documents simultaneously - no version mix-ups or email clutter. Intradisciplinary Engineering reviews carried out smoothly
Comment Review Sheet Automation
Auto-track CRS feedback, revisions, and status without manual spreadsheets.
Built-In Approval Workflow
Route documents for approval with clarity - no need for separate tools or reminders.
How Contrat.io Streamlines Your Review Process
Upload your technical Documents for Review
Upload your technical document revisions as PDF - your file is securely stored in the cloud. Review process takes place on the basis of that PDF.
Invite Reviewers & Authors
Assign roles, and kick off the review process right away.
Add Annotations & Comments
Capture feedback with contextual, in-document comments and threaded replies.
Route for Approval
Reviewers mark items as addressed; authors create revisions and lock changes.
Track Progress & Export Docs
View comments in the CRS table and export your document or review summary in PDF or XLS format.
Stay in control of the Review Process
Full control of the review process with efficient workflows greatly facilitating the raising of comments and the discussion required for their closure.
Pricing
Monthly
Yearly
Collaborator
No payment required
Review and approve documents
Access only to documents you're invited to
Lite
per year
€16.58/month billed annually
Everything in Free
Upload documents for review
Store up to 10 documents
Up to 5 users per document
Up to 15 revisions per document
Document uploads up to 20 MB each
Professional
per year
€41.58/month billed annually
Everything in Lite
Store up to 50 documents
Up to 10 users per document
Up to 15 revisions per document
Document uploads up to 50 MB each
Enterprise
per year
€58.25/month billed annually
Everything in Professional
Store up to 100 documents
Unlimited users per document
Unlimited revisions per document
Unlimited document size
About Us
We’re a team of engineers with over 20 years of hands-on experience in EPC (Engineering, Procurement, and Construction) projects. After years of dealing with the frustration of complex document review and approval workflows, we decided to build a better way, and that’s how contrat.io was born.
Our goal is simple: to make document collaboration effortless.
Contrat.io takes the pain out of coordination, so teams can focus on what really matters: solving technical challenges, not managing communication hurdles.
Industries
Contrat.io is a versatile collaboration and review platform designed for industries that manage complex engineering, procurement, and construction (EPC) projects. It streamlines document reviews, approvals, and comment management across multidisciplinary teams - making it ideal for sectors such as infrastructure, transportation, energy (including renewables, oil & gas, and power), water and utilities, mining, and industrial facilities.
From design drawings and technical submittals to contracts, change orders, and regulatory documents, Contrat.io centralizes workflows, enhances traceability, and ensures that every comment and revision is tracked efficiently. Whether for highways, bridges, metro systems, power plants, wind farms, or refineries, it provides a unified environment for engineers, contractors, clients, and regulators to collaborate seamlessly, improving coordination, compliance, and overall project delivery.