Compare software

PerfectIt vs proselint: catalog facts
PerfectIt	proselint
Paid Paid software with a free trial that needs no credit card details.	Free Free and open source under the BSD 3-Clause licence.
Windows	Windows, macOS, Linux, Command line
Checks consistency across the whole document, not just sentence by sentence Finds missing acronym definitions and capitalization inconsistencies	Checks based on established usage guides and editors Works on plain files from the command line
Depends on Microsoft Word Paid after the trial period	English only No graphical interface
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: BSD-3-Clause
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it 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.