All four can produce a network diagram. They're built for different jobs, though, and the right one depends on how you work. Here's an honest take, including when one of the others is the better pick.
you want a free, general-purpose diagram tool, you draw many kinds of diagrams besides networks, and you don't need the diagram to hold structured data like IPs and ports.
your organization is standardized on Microsoft 365, customers or colleagues expect .vsdx files, or you rely on vendor-supplied stencils for exact equipment faceplates.
real-time collaboration matters most: several people editing the same diagram at once, comments and sharing links across a team.
you're a network or telecom engineer and want the diagram to understand devices, ports, media types, VLANs and IP addressing, check itself, and hand over an inventory and cabling schedule, with diagrams kept on your own computer.
Standard features as of October 2026. The other products change too, so check their sites for the latest.
| draw.io | Visio | Lucidchart | NetworkSketch | |
|---|---|---|---|---|
| Best at | Free, flexible drawing of any kind | Microsoft 365 teams and .vsdx files | Real-time team collaboration | Network documentation |
| Price | Free | Paid per user (Microsoft plans) | Free tier with limits; paid plans | $9/month billed yearly, or $15 monthly; 7-day free trial |
| Network shapes | Large libraries, including vendor icons | Large libraries, plus vendor stencils | Large libraries, including vendor icons | Generic, vendor-neutral device artwork |
| Device details | Custom properties you set up yourself | Shape data you set up yourself | Custom data you set up yourself | Built in per device type: hostname, IP, model, serial, OS and more |
| Links | Lines and arrows with text | Connectors with text | Lines with text | Cables with media type, speed, VLANs and a port label at each end |
| Media type key | Drawn by hand | Drawn by hand | Drawn by hand | Builds itself from the media you used |
| Checks your work | No | No network checks | No | Duplicate IPs, IPs outside their subnet, reused ports, unlinked devices |
| Handoff | Image or PDF of the drawing | Image or PDF; reports from shape data you set up | Image or PDF of the drawing | PDF with title block, device inventory and cabling schedule, plus CSV |
| Collaboration | Through Google Drive, OneDrive or Confluence | Co-authoring in Microsoft 365 | Real-time editing and comments | One person per file; share the file or the PDF |
| Imports Visio files | Yes | Native | Yes | Not yet |
| Where diagrams live | Your choice of device or cloud drive | OneDrive / SharePoint, or local files | Lucid's cloud | Only on your computer, by design |
In a general drawing tool, a router is a picture and a cable is a line. Everything that makes the diagram useful to the next engineer (the IP, the switch port, whether that link is OM4 fiber or copper, which VLAN it carries) lives in free text you type and keep in sync yourself. That's fine for a one-off sketch. It gets painful when the diagram is the documentation: the IP in the label drifts from the spreadsheet, two devices end up with the same address, and the cabling schedule is a separate file nobody updated.
NetworkSketch treats the diagram as data. Devices have real fields, links are cables with ports and media, and areas are buildings, MDF/IDF rooms and VLANs. Because it knows what everything is, it can draw the media type key, arrange the layout around your buildings, flag addressing mistakes and print the inventory and cabling schedule straight from the diagram.
The trade-off is focus. NetworkSketch only does network diagrams (call flows live in its sister product, CallSketch), it doesn't have vendor faceplate stencils, and it isn't built for a room full of people editing at once. If those matter more than structured network data, one of the others is the better fit.
Open the campus template in your browser, no signup needed, and click a cable or a device.
Open the campus template