Harper replaces 3 paid apps
One open-source tool, 3 subscriptions it can stand in for. Each pairing below is curated and verified by hand, with the honest catch spelled out. No votes, no pay-to-list.
GrammarlyWith trade-offs$30/mo
A fast English grammar checker that stays on your device and mostly keeps its opinions to itself.
the verdict →all Grammarly alternatives →
Hemingway Editor PlusBuildable$8.33/mo
A fast English grammar checker that stays on your device and mostly keeps its opinions to itself.
the verdict →
LanguageToolBuildable$5.47/mo
A fast English grammar checker that stays on your device and mostly keeps its opinions to itself.
the verdict →all LanguageTool alternatives →last updated 2026-08-06 · up to $528/yr replaced · no votes, no pay-to-list
