Store and share your construction site files in a sovereign cloud.
Centralize plans, studies, photos, and as-built records in an environment hosted in France, and share them with all stakeholders, from the design office to the field.
Brick by brick, we build the sovereign environment you need.
Construction professionals face critical challenges.
A construction project involves years of documentation: plans, studies, contracts, photos, reports, and as-built records. Voltn (formerly NetExplorer) stores and circulates them in a sovereign cloud designed to keep pace with the field.
Ever-increasing file sizes
Long-term document retention
Coordinating multiple stakeholders
Access to documents on-site
Cyberattacks and construction site continuity
GDPR
The Voltn sovereign cloud processes its clients' personal data only within the scope of the services provided. Individuals authorized to handle this data are subject to a legal obligation of confidentiality.
It guarantees
Who is affected?
Risks of non-compliance
The ISO 27001 standard
The ISO 27001 standard confirms an audited and proven information security management system. At Voltn, it covers the entire platform, from the data center to the software.
It guarantees
Who is affected?
Risk in case of non-compliance
The ISO 9001 standard
ISO 9001 certification confirms Voltn's rigorous organization in meeting client needs. It demonstrates a commitment to service quality and continuous improvement.
It guarantees
Who is this for?
Risk in the event of non-compliance
eIDAS 2
The eIDAS2 regulation governs digital identity and electronic signatures in Europe. With Voltn Sign, your quotes, subcontracting agreements, and meeting minutes are signed within a legally recognized framework.
It guarantees
Who is affected?
Risks of non-compliance
The Numérique Responsable label
The Numérique Responsable label certifies Voltn's commitment to digital sobriety. This is a consistent approach given the growing environmental requirements in the real estate sector.
It guarantees
Who is affected?
Risks of non-compliance
- Data encryption and antivirus protection
- Protection against intrusions and leaks
- HDS certification for all activities
- GDPR alignment and eIDAS compliance
- Hosting exclusively in France
- Protection against extraterritorial legislation
- Granular access rights
- Complete action history
- Controlled sharing from the design office to the field
- Real-time co-editing and approval
The pillars of Voltn
Solutions tailored to your needs
Voltn Share secures your file exchanges with all project stakeholders. Voltn Workspace centralizes storage and collaboration for your projects.
External file sharing
Send files without size or format limits
Secure upload link
Password or SMS code protection
Full traceability of all exchanges
Custom portal branded for your company
The enterprise file platform
Centralized and replicated storage
Access management by project or trade
Version history and anti-deletion trash bin
Mobile app
Real-time co-editing
Concrete use cases in construction
Architect & engineering firm
Plans, technical studies, calculation notes, and graphic documents: the design phase generates heavy files that circulate between the agency, engineering firms, the client, and contractors. Every plan revision sent by email creates a risk of using an obsolete version on site.
Voltn centralizes project documentation: stakeholders always access the latest revision, communications are tracked, and large files are sent via secure links.
the construction site +
full traceability
General contracting and structural work
A general contractor orchestrates dozens of subcontractors, hundreds of documents, and teams split between the head office and job sites. Deliverables arrive via email, local servers become overloaded, and a ransomware attack can bring all operations to a standstill. Voltn organizes it all: a dedicated space for each project, an upload link to collect subcontractor deliverables, replicated storage to keep data safe, and mobile access for site managers.
accessible documents
Trades & Finishing Works
Electricians, drywallers, plumbers, painters: tradespeople work on multiple sites simultaneously, each with different plans, schedules, and instructions. The right document is often buried in an impossible-to-find email or left on a computer back at the workshop. With Voltn, every project has its own shared folder: up-to-date plans and instructions are accessible on mobile, and photos taken at the end of a job are uploaded directly to the right place.
documented interventions
Public Works & Infrastructure
Roads, utilities, and civil engineering structures: public works projects are subject to demanding public contracts and often span several years. Technical reports, as-built drawings, and final project documentation (DOE): every document creates a long-term liability for the company, sometimes for decades. Voltn secures this long cycle: tender documents are sent via protected links with expiration dates, project files remain hosted in France, and the complete final documentation is delivered in just a few clicks, regardless of its size.
stored documents
for the duration of the project
What about other sectors?
Real Estate
You can be certain that you own your data.
Accounting
Education
96% of our clients recommend us
Dominique Tessaro
Chief Information Officer at Vinci Energies
“We were looking for a document sharing solution that met our security and confidentiality requirements, accessible on the move and user-friendly enough to avoid shadow IT. Hosted in France and ISO 27001 certified, Voltn was chosen to meet these criteria, notably with secure SAML authentication.”
FAQ
Can field teams access the documents?
Yes. The Voltn mobile app gives access to plans, schedules and site instructions directly from the construction site, even offline. Photos and reports are uploaded straight into the right folder.
How do you hand over a complete as-built file (DOE) at delivery?
Through a secure share link, whatever the size of the file set. The recipient downloads everything in one go, and you keep timestamped proof of the transfer.
How do you retain construction site documents over the long term?
Voltn keeps your documents for as long as you need, with version history and a recycle bin that guards against accidental deletion. For long-term archiving, the Vault option adds an immutable backup on LTO magnetic tape.
How do you send plans that are too large for email?
Through a secure Voltn Share link, with no size or format limit. Plans, BIM models, photos and videos are transferred encrypted, with full traceability of views and downloads.
Where can construction site documents be stored securely?
In a Voltn Workspace area dedicated to the project, hosted exclusively in France. Every file is encrypted, scanned by antivirus and replicated in real time across three storage media split between two separate data centres.
But let's be honest, our cloud-based file storage and sharing solution is much easier.