PriMus Online — Free Online Cost Estimating Software
Professional Construction Estimating. In Your Browser. Free to Start.
PriMus online is cloud estimating software that brings construction cost estimates, bills of quantities, and real-time team collaboration into any browser — on any device, from any location, with no installation required. The online construction estimator that gives your entire commercial team access to the same estimate, simultaneously, from anywhere they work.
Free Access Callout The Light version is permanently free — cost estimates and price list access included. No credit card. No time limit. Upgrade to Full for complete cloud-based bill of quantities and construction cost management.
Trust Statement Before technology, there has to be a relationship. ACCA software and Isotech support estimating teams and commercial managers across the GCC — coaching and guiding your adoption of web based estimating at every step.
Value Pillars
Free Online Cost Estimating Software. No Installation.
Start producing professional cost estimates immediately — no download, no setup, no IT approval required. PriMus online is the online construction estimator that works in any browser on any device from the moment you register.
Value
Real-Time Team Collaboration
Multiple team members working on the same estimate simultaneously — changes visible in real time, with built-in chat in the same working environment. Web based estimating built for distributed GCC project teams across multiple offices, cities, and countries.
Cloud-Based Bill of Quantities. Always Accessible.
Every estimate and online BoQ stored securely in the cloud — accessible from anywhere, backed up automatically, protected by role-based access controls. No local files. No version confusion. No lost data.
Part of the Full BIM Cost Workflow
PriMus online integrates within the usBIM platform alongside PriMus IFC for BIM quantity takeoff and PriMus for full desktop cost management — connecting cloud estimating software to a complete 5D BIM estimating environment when your projects require it.
Isotech Support from Day One
Isotech coaches and supports commercial and estimating teams across the GCC from initial setup through long-term adoption. Before technology, there has to be a relationship.
The Problem with Disconnected Estimating
If Your Cost Estimate Lives on One Person's Laptop, It Is Not Working Hard Enough.
For many estimating and quantity surveying teams across the GCC, construction cost estimates are still managed in spreadsheets saved to a local machine. The estimate is on one computer. Only one person can edit it at a time. Sharing it means sending a file over email — and the moment two people edit separate copies, the version control problem begins.
When the project is moving fast, the estimate is never where you need it. When a team member is on site, they cannot access it. When the design changes and the project director needs an updated cost in the next hour, they are waiting for someone to open a laptop and send a file.
PriMus online is the cloud estimating software that ends this workflow. As online cost estimating software, it puts the estimate in the browser — accessible to every authorised team member from any device, updated in real time as the team works, and stored securely in the cloud so it is never at risk of being lost or locked behind a single machine.
This is what professional web based estimating looks like for GCC commercial teams that need to move at the speed their projects demand.
One laptop. One person.
The estimate is locked to a single machine. No one else can work on it at the same time.
Email = version chaos
The moment two people edit separate copies, version control breaks down completely.
Waiting for a file
Design changes. The director needs an updated cost in an hour. Someone has to find a laptop and send a file.
Try PriMus online free — the Light version is permanently free with no time limit. Upgrade to Full when your project requires complete online BoQ and construction cost management capability.
Produce professional construction cost estimates online using an intuitive interface and free access to a constantly updated price list database. The Light version is permanently free — no subscription, no time limit — providing immediate, professional-grade estimating capability for preliminary budgets, design-stage cost plans, and client-facing cost summaries.
For GCC estimating teams who need a capable free online cost estimator as their starting point, PriMus online Light removes every barrier to getting started.
Upgrade to PriMus online Full for complete online BoQ production — structured bills of quantities to any format your client, contractor, or government authority requires. Full construction cost management across the project lifecycle. Export to PDF, Excel, and Word for submission and procurement documentation.
For GCC construction companies and quantity surveying practices producing formal tender documentation and government procurement submissions, the Full version provides the depth and document quality that professional practice requires.
Every authorised team member accesses and edits the same estimate simultaneously. Changes appear in real time across all sessions — no saving, no sending, no version reconciliation after the fact. Built-in chat allows the commercial team to communicate within the same web based estimating environment, without switching to a separate messaging tool.
For distributed teams across the GCC — where the estimator is in one city, the commercial director in another, and the project manager on site in a third — this real-time collaboration removes the coordination friction that makes traditional estimating workflows slow and error-prone on deadline.
PriMus online works on desktop, laptop, tablet, and mobile — on Windows, Mac OS, and every standard browser. No installation dependency. No version updates to manage. The online construction estimator is always current and always accessible from any device your team uses.
All estimate and BoQ data is stored in the usBIM cloud with GDPR-compliant data protection, role-based access controls, and automatic backup with advanced disaster recovery. Every team member sees only the documents they are authorised to access. No data is lost to hardware failure or accidental deletion.
Light vs Full
Start Free. Scale When You Need To.
Light
Free • No Time Limit- Cost estimates from first principles
- Free price list database access
- Browser-based access on any device
- No installation required
- No credit card required
- Permanently free
Full
Professional Subscription- Everything in Light
- Complete online BoQ production
- Full construction cost management
- Export to PDF, Word & Excel
- Advanced collaboration controls
- PriMus Desktop integration
- PriMus IFC integration
BIM Connection
Web Based Estimating That Connects to BIM When Your Projects Require It.
PriMus online is the cloud-based estimating layer within the usBIM platform — working alongside PriMus IFC for automatic BIM quantity takeoff from IFC models, and PriMus for full desktop construction cost management.
For project teams moving toward 5D BIM workflows, PriMus online provides the collaborative cloud environment where model-derived quantities are reviewed, refined, and shared. The IFC quantity takeoff from PriMus IFC and the real-time collaboration of PriMus online work together as one connected commercial process.
For GCC organisations at early stages of BIM adoption, PriMus online is the accessible entry point — professional online construction cost estimating today, with a clear, supported path to full BIM-connected estimating when the programme is ready. Isotech guides and supports this transition at every step.
"Start with cloud estimating today. Connect BIM quantity takeoff when your projects are ready."
IFC Quantity Takeoff
Automatic quantity extraction from IFC models.
Collaboration
Review and share estimates across project teams.
PriMus Online
Cloud Estimating Platform
Cost Management
Professional construction estimating and cost control.
5D BIM Workflow
Connect quantities, costs and project information.
Isotech Differentiator
Online Cost Estimating Software. With Regional Coaching and Support Behind It.
PriMus online is cloud estimating software from ACCA — the world's number one IFC-certified openBIM expert. As Isotech, we bring it to estimators, quantity surveyors, and commercial teams across the MEA with onboarding support and regional context.
For teams transitioning from spreadsheets, Isotech provides coaching that turns a registration into a productive commercial workflow.
"Before technology, there has to be a relationship. We work alongside your teams to ensure successful adoption, measurable value, and long-term operational success."
Tailored PriMus online setup within usBIM for GCC estimating environments.
For estimators, QS professionals, and commercial managers at every level.
Connect to PriMus IFC for full BIM-linked quantity takeoff when required.
Dedicated support across the GCC and MEA in multiple languages.
What Our Testimonials Say
Marcin Pszczolka
Poland • Civil Design Lead
Pierpaolo Canini
Switzerland
Victor Fuentes
Chile
David Quevedo
Ecuador
Marcin Pszczolka
Poland • Civil Design Lead
Pierpaolo Canini
Switzerland
Victor Fuentes
Chile
David Quevedo
EcuadorTechnology Partner
We are proud to partner with ACCA Software, a global provider of BIM, digital construction, and Common Data Environment (CDE) solutions. Through this collaboration, we leverage advanced technologies that support ISO 19650-compliant workflows, streamline project coordination, and enhance information management across the entire project lifecycle.
This partnership enables us to deliver innovative, scalable, and industry-aligned solutions that help clients improve collaboration, efficiency, and project outcomes.
Questions Worth Answering Up Front.
What is PriMus online and who is it for?
PriMus online is cloud estimating software for estimators, quantity surveyors, and commercial managers who need professional construction cost estimates and bills of quantities accessible from any browser — with real-time team collaboration built in. The Light version is permanently free. The Full version adds complete online BoQ production and full construction cost management. It connects directly to PriMus IFC for BIM quantity takeoff within the usBIM platform.
Is PriMus online really free?
Yes. The Light version is permanently free — no time limit, no credit card, no subscription required. It includes cost estimates and free access to a construction price list database. The Full version, which adds complete online BoQ production and cost management, is available on a paid plan. Isotech can advise on the right option for your team size and project volume.
How does real-time collaboration work?
How does PriMus online connect to BIM quantity takeoff?
PriMus online sits within the usBIM platform alongside PriMus IFC — the 5D BIM tool for automatic quantity takeoff from IFC models. Quantities extracted by PriMus IFC feed directly into the estimating environment, where they are reviewed, refined, and developed into a complete cost estimate or online BoQ. Isotech supports the full integration and workflow setup for teams moving toward BIM-connected estimating.
What support does Isotech provide?
Isotech provides onboarding, workflow configuration, and long-term technical support across the MEA region — configuring PriMus online for your project types, team structure, and GCC procurement requirements. Contact our team to discuss your specific needs.
Professional Online Construction Cost Estimating. Free. In Your Browser. Right Now.
PriMus online is the free online cost estimator that gives every member of your commercial team professional cloud-based bill of quantities and construction cost estimating capability — in any browser, on any device, with no installation and no time limit. Backed by Isotech’s coaching and regional support across the GCC and MEA from day one.
Start free. Collaborate immediately. Build with Isotech alongside you.
“Technology creates possibilities. Relationships create successful outcomes.”
