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SimplySerial vs tio: catalog facts
SimplySerial	tio
Free Free and open source under the MIT licence.	Free Free and open source.
Windows, Command line	Linux, Command line
Runs directly in a Windows console window Quick way to open a serial connection	Simple to start with a single command Works entirely in the terminal
Windows only Basic feature set compared with full serial terminal programs	Command line only, no graphical interface Only for serial connections, not SSH or Telnet
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License not stated
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.