CAD drawing management software that keeps every drawing under revision control.
CAD and engineering drawing management for the drafting leads, engineers, and asset teams who work from the drawing record. Put every DWG, DGN, RVT, and PDF under revision control, search the text printed inside scanned sheets, and open any drawing in the browser without a CAD licence.
For the register discipline behind the drawings, approval routing, controlled distribution, and the audit trail, read document control software. For the wider set of controlled documents around them, read engineering document management.
10M+ documents under management · Hosted in Australia and the US · SAML · Full audit trail
A shared drive was never a drawing register.
Drawings sit in nested folders on SharePoint or a shared drive. The current revision is a guess, superseded sheets stay in circulation, and the text inside a scan is invisible to search. When an auditor asks who changed a drawing, and when, the answer is an email thread.
Lunr is drawing management software built for the record. Every drawing carries its revision history, the superseded copy is kept and marked, and every change is logged.
- 01The current revision is a guess. Superseded sheets stay in the same folder as the live one.
- 02The text inside a scanned drawing is invisible to search, so a valve tag on an old sheet is unfindable.
- 03Opening a DWG means a CAD licence, so most of the team cannot see the drawing at all.
- 04Handover arrives over email, and nothing checks the set against what was promised.
- 05There is no audit trail, so no one can show who changed a drawing, or when.
Read the title block, keep the xrefs, hold the native CAD file.
A CAD drawing is rarely self-contained. It carries title block attributes, and it points at other drawings as external references, so renaming or moving one file quietly breaks another. Lunr reads that structure as the drawing is booked in. Title block attributes become metadata, external references are extracted and validated, and a missing xref is reported before the sheet enters the record.
- Title block attributes read off DWG and DGN sheets into metadata, so a drawing arrives numbered and searchable.
- External references extracted and validated on upload, with a missing xref reported before the drawing is booked in.
- Drawing styles validated and missing fonts reported, so a sheet renders the same for everyone who opens it.
- Native DWG, DGN, and RVT files held under revision control, and any supported format rendered to PDF.
- Designers carry on authoring in AutoCAD, MicroStation, or Revit, and the issued drawing lands in the record under a revision.
DWG · DGN · RVT · IFC · PDF · title block attributes · XREFs · styles · missing fonts · render to PDF
- DWG
- AutoCAD drawings, with title block attributes and external references read on the way in.
- DGN
- MicroStation drawings, treated exactly as the Autodesk formats are, references and all.
- RVT
- Revit models, held under revision control beside the drawings issued from them.
- IFC
- Open BIM models, read in the Foundry viewer alongside the drawings.
- Issued sheets, searched by the text printed inside them rather than by file name.
- Scans
- Legacy sheets scanned to image, read by XRAY OCR and returned by the tag printed on them.
Every revision kept, the superseded copy marked.
Book a drawing in and Lunr numbers it, keeps its full revision history, and marks the previous revision as superseded. The live drawing is never confused with an old one, and any change can be traced years later.
- Automatic document and version numbering, applied as drawings are booked in.
- A full revision history on every DWG, DGN, RVT, and PDF, so any change can be traced.
- Superseded revisions are kept and marked, never deleted and never mistaken for the current sheet.
- Compare two revisions side by side, or overlay them to see exactly what moved.
revision history · automatic numbering · superseded marking · side-by-side compare · overlay compare
See how revision control works
Search the words printed inside the drawing.
XRAY runs OCR and full-text search across every drawing, scans included. Search a valve tag, a title-block reference, or a note, and Lunr returns the sheet whether it was saved this morning or scanned from a 1994 archive. Deep XRAY re-scans a dense sheet tile by tile, so nothing on the drawing is missed.
- OCR and AI full-text search across every DWG, DGN, RVT, PDF, and scanned image.
- Find a tag, a reference, or a note printed inside the drawing, not just the file name.
- Deep XRAY re-scans a dense sheet tile by tile, so nothing on the drawing is missed.
- Filter results by metadata, tags, and revision to narrow a large set fast.
OCR · AI full-text search · deep XRAY tile re-scan · metadata and tag filters
See how XRAY search works
Open any drawing in the browser, no CAD licence.
The whole team opens drawings in the browser. The Rift viewer renders DWG, DGN, and PDF at full fidelity, with layers, measurement, and markup, so a document controller or an engineer reviews a drawing without a CAD seat. Models open in Foundry, point clouds in Nimbus.
- View DWG, DGN, RVT, and PDF in the browser, with no CAD licence and nothing to install.
- Toggle layers, measure, and mark up the drawing straight in the viewer.
- Open BIM models in Foundry and point clouds in Nimbus from the same record.
- Turn a redline into a change request or an RFI without leaving the viewer.
browser viewers · layers · measurement · markup · no CAD licence
Try the viewers
Take a drawing set in complete, and send it out under revision.
Validate every handover package against a manifest, so a missing as-constructed drawing is caught on upload. Title-block tags come off each sheet into metadata as the set lands, and the drawings you send out go on a transmittal that records the revision issued.
- Validate each handover package against a manifest, so a missing as-constructed sheet is caught on upload.
- Title-block tags are read into metadata, so a drawing arrives searchable rather than as a bare file.
- Send a drawing set out on a transmittal, with the revision of each sheet recorded against it.
- Every controlled drawing keeps an audit trail of what changed, when, and who changed it.
manifest validation · title-block tags · transmittals · revision issued · audit trail
One drawing record, connected to the systems you run.
Lunr holds the drawing record while your other systems run their own jobs. Read and write CAD through the connector APIs, tie drawings to Esri GIS, and connect the facilities systems that run the estate. Every capability is included as standard, with pricing shaped to your organisation.
Read and write DWG and DGN through the connector APIs, so your CAD stays in step with the record.
Tie drawings to their place on the network, and open the record from the map.
Connect Archibus, MazeMap, and SISfm to share the drawing record with the systems that run the estate.
Bring drawings in from OneDrive, and sign staff in with your identity provider over SAML.
See every CAD, GIS, and facilities connector on the connectors page. Tying drawings to a GIS earns its keep where the assets are spread across a network, so see how that runs for utilities and energy.
Trusted with the drawings owners keep for decades.
Universities, utilities, energy companies, and government departments run their drawing record on Lunr, from project delivery through the operating life of the asset.
documents under management on Lunr. Proof the drawing record holds up at owner-and-portfolio scale.
Read the University of Canberra case study“Lunr is a simple solution that provides the flexibility to develop the system to our needs. Lunr is simple to use, and minimal training is required.”
Questions teams ask about CAD and engineering drawing management.
What it does, which CAD formats it holds, how it differs from a shared drive, and what it takes to move your drawings across.
- What is drawing management software?
- Drawing management software stores your engineering drawings in one controlled record, with revision control, full-text search, and browser viewing. It replaces nested folders on a shared drive with a register where the current revision is clear, superseded sheets are kept and marked, and every change is logged. Lunr does this for DWG, DGN, RVT, PDF, and scanned drawings.
- How is drawing management software different from a shared drive or SharePoint?
- A shared drive holds files. It does not know which revision is current, it cannot search the text printed inside a scanned drawing, and it keeps no audit trail. Drawing management software adds revision control, XRAY full-text search, browser viewing without a CAD licence, and a log of every change. The University of Canberra moved more than 20,000 documents off SharePoint onto Lunr for this reason.
- What file formats does drawing management software support?
- Lunr holds DWG, DGN, RVT, PDF, and IFC under revision control, along with Word and Excel. You view drawings, models, and point clouds in the browser, and search the text inside every format, scans included.
- Do you need AutoCAD or a CAD licence to view drawings?
- No. The whole team opens DWG, DGN, and PDF drawings in the browser through the Rift viewer, with layers, measurement, and markup. Models open in Foundry and point clouds in Nimbus. A CAD seat is only needed to author drawings, not to review them.
- Does Lunr work with AutoCAD and MicroStation drawings?
- Yes, and neither format needs its authoring application to be read. DWG from AutoCAD and DGN from MicroStation are both first-class: Lunr reads title block attributes off either one, extracts and validates their external references, and opens the sheet in the Rift viewer in the browser. Designers carry on authoring in AutoCAD, MicroStation, or Revit, and the issued drawing lands in the record under a revision.
- What happens to external references when a drawing moves?
- The reference set is read out of the file and held as part of the record, so a folder move cannot break it. On upload, Lunr validates each package and reports missing external references before the drawings are booked in, which is where an xref left behind at handover would otherwise go unnoticed for years.
- Can a document management system handle engineering drawings?
- It can hold the files. Reading what is inside them is the harder part. A general document management system has no idea a DWG points at other drawings as external references, it applies no drawing numbering scheme, and it cannot open a sheet without the authoring application installed. CAD document management adds the drawing-specific parts: identity by drawing number, an issued revision on every sheet, external references validated on upload, and title block attributes read into metadata. The wider document set around the drawings, the reports, specifications, and certificates, sits in the same record under engineering document management.
- How are revisions and superseded drawings handled?
- Lunr numbers each drawing as it is booked in and keeps its full revision history. When a sheet is superseded, the earlier revision stays on the record, numbered and marked, so no one mistakes it for the current one. Compare two revisions side by side, or overlay them to see what moved.
- Can you migrate drawings from an existing system or SharePoint?
- Yes. Import drawings in bulk, and Lunr reads title-block tags from each sheet into metadata so you do not retype them. Automatic numbering applies your register format as records come in. Export all metadata, drawings, and models at any time, so your record stays yours.
- Where is the data hosted, and how is it secured?
- Lunr is hosted in Australia and the US, and your instance sits in the region you require. Staff sign in over SAML with your identity provider, external parties join as Collaborators, and every controlled drawing carries a full audit trail. Over 10 million documents are under management on Lunr today.
See it on your own drawings.
Book a walkthrough with someone who knows what a transmittal and an as-constructed drawing are, and watch Lunr run against a set of your own.
10M+ documents under management · Hosted in Australia and the US · SAML · Full audit trail · Export anytime
- entity
- Lunr Labs Pty Ltd
- location
- Melbourne AU
- workspace
- documents.lunr.app
- rev
- 2026