Nx Witness alternative
Not a Linux argument — Nx runs on Linux too. A licensing and analytics one.
Valdexia is a self-hosted VMS for ONVIF and RTSP cameras with object detection, plate recognition and appearance search included rather than sold per device, administered in a browser with nothing to install on an operator's machine.
Comparison pages that pretend the other product is bad are not useful to anyone making a real decision, and Nx Witness is a genuinely well-built system. It is fast, it is Linux-native rather than Windows-shaped, the desktop client is responsive at large tile counts, and the people who choose it usually chose it for good reasons. If you are running it happily at a fixed camera count, there is no argument on this page that should move you.
The differences that matter are narrower than the usual marketing framing. They are about how the licences are counted, where the analytics sit in the price list, and what has to be installed on each operator's desk.
Structural differences from Network Optix's published licensing and product documentation. Exact prices are set by regional partners, so none are quoted here.
| Nx Witness | Valdexia | |
|---|---|---|
| Licence counting | Per-camera recording licences. Professional licences are perpetual per channel; Gen 6 Enterprise moves to usage-based subscription services billed through partners. | One base licence per system plus one perpetual channel per camera, at the same channel rate on both tiers, with no per-server licence. AI object detection is in it; plate recognition, face recognition and forensic review are licensed per camera on top, for the cameras that need them. |
| Video analytics | Nx AI Manager is a separate product, licensed per device on top of the recording licences, with models from an external marketplace. | Object detection, plate recognition, appearance search, heatmaps, video synopsis, anonymisation and face recognition included in Professional and Enterprise. One mid-range NVIDIA GPU covers 150+ cameras. |
| Operator client | A native desktop client for Windows, Linux and macOS, with a browser client alongside it that covers a subset of the same ground. | One web interface for everything — live walls, playback, forensic search, alarms, administration. Nothing installed on the workstation, no per-seat licence, no client version to keep matched. iOS and Android apps included on every tier. |
| Remote access | Nx Cloud provides remote connectivity and account management as a hosted service. | A self-hosted relay with end-to-end encrypted sessions, plus direct peer-to-peer when the network allows it. Video is not readable by the relay in transit. |
| Server platform | Linux, Windows and ARM, which is a real strength of the product. | Ubuntu 24.04 LTS on x86, from a NUC-class mini PC up to a server rack. No operating system licence to buy. |
| Quoting | List prices are not published globally; figures come from regional partners and resellers, so the number depends on who you ask. | Quoted per site, like every enterprise VMS — but the structure is one rate per channel with no base or per-server licence, so the figure is derivable from the camera count rather than a lookup. In rand, VAT inclusive, from us directly. |
| Evaluation | A free licence is available for a small number of cameras. | A demo licence: the whole product for 7 days on up to 10 cameras, nothing switched off, and a longer or larger one on request for a real evaluation. No permanently free tier. |
Network Optix does not publish global list prices, and licensing differs between the Professional and Enterprise generations and between regions. The structural points above reflect Network Optix's published product and licensing documentation as at October 2026; confirm the current terms with an Nx partner before deciding.
At this size the two models are not variations on each other. A per-channel recording licence is counted once per camera, and Nx AI Manager is licensed per device on top, so an estate that wants detection everywhere is counting to 2,500 twice. Valdexia Enterprise is counted per recording server with unlimited cameras on each, and the AI is already in that number.
That 2,500-camera figure assumes AI detection on every single camera, at the 150-cameras-per-GPU density we run in production — it is the most expensive shape this can take, because the GPU is what sets the server count. Most estates of this size run detection on the cameras that need it rather than all of them, which means fewer servers for the same camera count. No Nx figure is quoted here, because Network Optix does not publish global list prices — regional partners set their own, so any number we printed would be a guess about someone else's margin. Send us the same specification and we will quote against it line for line.
Not the headline per-channel rate. Ask for the all-in cost per camera over the life of the system: the recording licence, plus the AI device licence on every camera you want detection on, plus whatever support attaches to both, plus the Windows licences if the servers run Windows. That is the number you will pay, and it is the one that makes the two models comparable at all.
The part worth isolating is the second count. An estate that wants detection everywhere counts to 2,500 twice — once for recording and again for AI. Ours counts once: object detection and tracking is in the channel licence on every camera, and only the specialist analytics are per camera on top.
The second question decides the next five years rather than the first. Ask what two hundred more cameras cost, and whether running detection on them costs more again. Ours is two hundred channels at the same rate as the first sixteen, with detection already in them and no per-server licence however many recorders it takes. Send us the same specification and we will quote against it line for line.
Three situations where the models diverge enough to matter.
Per-channel licensing means every camera added is another licence bought. On a camera-band or per-server model, filling out an existing band costs nothing — which is the normal pattern on an estate or a plant that expands a phase at a time.
When AI is licensed per device, analytics get rationed to the cameras that justify the spend. When it is included, you run detection on everything and let the system decide what matters — which is the point of having it.
A duty manager who looks at cameras twice a week, a branch manager, a contractor supervisor. A browser login costs nothing to add and nothing to maintain; a desktop client on each of their machines is a rollout and a version-matching problem.
It depends on camera count and on whether you want analytics, and anyone who answers without asking those two things is guessing. Nx is licensed per camera with AI priced per device on top; ours is one perpetual channel licence per camera with AI object detection already in it, and no per-server licence on either tier. The gap therefore widens as the proportion of cameras running analytics rises, and on Enterprise as camera density per server rises. Our prices are published in rand on the pricing page, so the comparison is one you can do yourself against a partner quote.
No, deliberately. Everything an operator does — live walls up to 10×10, playback, forensic search, alarm handling, PTZ, administration — is in the browser, so adding a user is a login rather than a software rollout, and there is no client version to keep matched to the server. Native iOS and Android apps are included on every tier.
Yes, once Nx is decommissioned, provided it is Ubuntu 24.04 or can be reinstalled as such. During an evaluation it is better to run the two on separate machines and let both record the same cameras for a week, since a second VMS subscribing to a second RTSP stream is routine for an IP camera.
Only for the AI features. Recording, live view, playback and clip export run perfectly well on CPU alone, so a site can start without one and add it later. For detection, one mid-range NVIDIA card handles over 150 cameras, and on a small site the integrated Intel graphics of a NUC-class mini PC are enough.
A demo licence runs the whole product for 7 days on up to 10 cameras, with nothing switched off and no card. Point it at the cameras you already own and see what it does before anything changes — and if a week or ten cameras is not enough to prove it, say so and we will issue a licence that fits the evaluation.