What are the best free SCADA software options for evaluating a supervisory control pilot?

If you’re evaluating a supervisory control pilot, the best free SCADA options are usually the ones that are:

• easy to install and test,
• support common industrial protocols,
• have decent HMI/alarm/trend features,
• and can be used for a proof-of-concept without a license cost.

Here are the strongest free options, grouped by practical usefulness:

Best free SCADA software to evaluate

1. Ignition Maker Edition (Inductive Automation)

• Best for: learning, prototyping, small internal pilots
• Pros:
  • Modern UI and very capable
  • Great support for tags, alarms, trends, scripting, dashboards
  • Supports OPC UA and many industrial integrations
  • Free for personal/non-commercial use
• Cons:
  • Maker Edition is not for commercial deployment
  • Some features differ from the full commercial version
• Why it’s good for pilots: very realistic SCADA experience and easy to scale into a full system later

2. Rapid SCADA

• Best for: lightweight industrial monitoring and control evaluation
• Pros:
  • Free and open source
  • Supports alarms, trends, reporting, OPC UA, Modbus, MQTT via modules
  • Web interface available
  • Good for small to medium pilot systems
• Cons:
  • UI/UX is more utilitarian than polished commercial platforms
  • Requires some configuration effort
• Why it’s good for pilots: practical, flexible, and genuinely usable for real supervisory control testing

3. ScadaBR

• Best for: simple pilot projects and web-based monitoring
• Pros:
  • Open source
  • Web-based HMI
  • Supports Modbus and OPC
  • Easy to understand for basic SCADA use cases
• Cons:
  • Less active development compared with some others
  • Fewer advanced features
• Why it’s good for pilots: good if you need a straightforward, no-cost system for basic evaluation

4. OpenSCADA

• Best for: technically advanced users, custom engineering
• Pros:
  • Open source and very flexible
  • Supports multiple architectures and drivers
  • Can handle broader automation needs
• Cons:
  • Steeper learning curve
  • Less beginner-friendly
• Why it’s good for pilots: useful if you want deep configurability and don’t mind setup complexity

5. FUXA

• Best for: web HMI/SCADA prototyping
• Pros:
  • Free and open source
  • Modern browser-based interface
  • Good for dashboards, trends, alarms, and basic control
  • Easy to demo
• Cons:
  • Not as mature as industrial mainstream platforms
  • Better for visualization than large-scale SCADA
• Why it’s good for pilots: quick to stand up and useful for front-end evaluation

If your pilot needs protocol compatibility

Choose based on what you need to connect:

• OPC UA: Ignition Maker, Rapid SCADA, OpenSCADA
• Modbus TCP/RTU: Rapid SCADA, ScadaBR, OpenSCADA, FUXA
• MQTT / IIoT-style integration: Ignition, Rapid SCADA, some OpenSCADA setups
• Web-first visualization: FUXA, ScadaBR, Rapid SCADA

My practical recommendation

For most supervisory control pilots, I’d shortlist:

1. Ignition Maker Edition — best overall experience for evaluation
2. Rapid SCADA — best open-source “real SCADA” alternative
3. FUXA — fastest web-based prototype/demo option

Quick rule of thumb

• Want the best free-feeling commercial-grade evaluation? → Ignition Maker
• Want open source and functional? → Rapid SCADA
• Want the simplest browser-based demo? → FUXA

If you want, I can also give you:

• a comparison table,
• recommendations based on your protocol/device type,
• or a pilot architecture for PLC/RTU + historian + HMI.