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sales@modbus.appConnection issues, license activation, troubleshooting, feature requests, and bug reports.
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hello@modbus.appDeactivate on your old machine from Settings, then activate on the new one. If you no longer have access to the old machine, email support@modbus.app and we'll reset your activation.
Check our troubleshooting guides first — we cover timeout errors, CRC failures, connection refused, RS-485 wiring issues, and more.
See our pricing page for standard Team ($749, 5 seats) and Site ($1,699, 10 seats) licenses. For larger deployments or purchase orders, email sales@modbus.app.
Check your spam/junk folder — the email comes from license@modbus.app. If it's not there, email support@modbus.app with your order confirmation.
We offer a 30-day money-back guarantee, no questions asked. Email support@modbus.app with your license key and we'll process it immediately.
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