Comparison
Raylux and VTScada, compared
VTScada licenses by the number of I/O tags and per installed PC. Raylux does not count tags and meters concurrent operator clients instead.
Licensing side by side
VTScada against Raylux, checked on 5 October 2026.
| Item | VTScada | Raylux |
|---|---|---|
| What sets the price | The number of I/O tags that read and write data to external equipment and software. | The gateway licence and the modules you add. Tags and devices are unlimited. |
| Licensed per | Installed PC. | Gateway licence, covering one plant. |
| Remote clients | Thin Client connections (phones, tablets, PCs) are licensed per concurrent user. | Operator clients are counted concurrently, on a browser, phone, tablet or Lens panel: two with Spectrum, then per client up to nine, then capacity tiers. |
| Licence term | One-time, with an optional yearly support and upgrade plan (SupportPlus). | Perpetual, with a Support Plan at 20% a year. |
| Prices published | Trihedral publishes a US price list. | Yes, on the pricing page, with a configurator. |
| Free and trial | VTScadaLIGHT is a free licence limited to 50 I/O tags. A 90-day trial is available on request. | Free download, fully unlocked for two hours at a time. Restart it as often as you like. |
Where VTScada is the stronger choice
Track record. VTScada has a long track record, particularly in water and wastewater. Raylux is a new product with a short history.
A free licence. VTScadaLIGHT is free within 50 I/O tags. Raylux has no free licence, only the restartable trial.
Trial length. A 90-day trial on request gives you a longer unbroken evaluation than Raylux's two-hour sessions.
Where Raylux fits
Tag count does not change the Raylux price. The gateway licence, $995, includes unlimited tags and devices, all eight protocols, and OPC UA as both client and server, with no per-driver charge.
What you do pay for is operator screens and modules. Concurrent operator clients are metered, and Spectrum HMI, Historian, Reporting and Alarm notification are priced separately. Raylux has no water-specific history to point to.
Raylux runs on Windows or Linux, and edge licences for a single machine or panel start at $495.
Looking for a VTScada alternative?
The simplest test is to try Raylux on your own devices. The free download is fully unlocked for two hours at a time, with every driver, every module and unlimited tags and clients, and you can restart it as often as you like. Then price your plant on the pricing page.
Sources
Checked on 5 October 2026 against Trihedral's own pages: vtscada.com/scada-software-pricing, vtscada.com/software-licensing. Terms change, so confirm current terms with the vendor before you decide.
VTScada, VTScadaLIGHT, SupportPlus and Trihedral are trademarks of their owners. Raylux is not affiliated with or endorsed by them.