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SimplySerial vs HTerm: catalog facts
SimplySerial	HTerm
Free Free and open source under the MIT licence.	Free Freeware; the author accepts donations via PayPal.
Windows, Command line	Windows, Linux
Runs directly in a Windows console window Quick way to open a serial connection	ASCII, hex, binary and decimal input and output Works with hardware and virtual USB serial ports
Windows only Basic feature set compared with full serial terminal programs	Closed source freeware Configuration is done through an XML file
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License: Freeware
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.