Office · paid tool
Grammarly Premium alternatives
Writing assistant for grammar, clarity, and tone suggestions.
Free alternatives
Highest score first. The score weighs licence openness, repository activity, traction, feature coverage, and cost; factors without data are left out and the rest are reweighted.
LanguageTool
Ranking score 89.6/100
Grammar and style checker with offline and self-hosted options.
- Licence
- LGPL-2.1
- Platforms
- web, macos, windows, linux, self-hosted
- Self-hostable
- Yes
- Repo activity
- Last commit October 25, 2026
- GitHub stars
- 15,197
- Last verified
- October 24, 2026
Why this rank
Score breakdown for LanguageTool Factor Points Weight Licence opennessLGPL-2.1 licence (open); self-hostable 25 25% Repository activityLast activity 1 day(s) before 2026-10-26 25 25% Popularity15197 GitHub stars 17.8 20% Feature coverage4 of 6 curated capability tags covered 13.3 20% Costopen-core pricing model 8.5 10% Points add up to the score. Factors without data are left out and the remaining weights are renormalised.
Harper
Ranking score 80.5/100
Offline grammar and spell checker built for fast editor integration.
- Licence
- Apache-2.0
- Platforms
- macos, windows, linux
- Self-hostable
- No
- Repo activity
- Last release October 16, 2026
- GitHub stars
- 17,145
- Last verified
- October 24, 2026
Why this rank
Score breakdown for Harper Factor Points Weight Licence opennessApache-2.0 licence (open); not self-hostable 17.5 25% Repository activityLast activity 0 day(s) before 2026-10-26 25 25% Popularity17145 GitHub stars 18 20% Feature coverage3 of 6 curated capability tags covered 10 20% Costfree pricing model 10 10% Points add up to the score. Factors without data are left out and the remaining weights are renormalised.
Vale
Ranking score 78.7/100
Command-line prose linter for style guides and documentation rules.
- Licence
- MIT
- Platforms
- macos, windows, linux
- Self-hostable
- No
- Repo activity
- Last release October 22, 2026
- GitHub stars
- 6,290
- Last verified
- October 24, 2026
Why this rank
Score breakdown for Vale Factor Points Weight Licence opennessMIT licence (open); not self-hostable 17.5 25% Repository activityLast activity 1 day(s) before 2026-10-26 25 25% Popularity6290 GitHub stars 16.2 20% Feature coverage3 of 6 curated capability tags covered 10 20% Costfree pricing model 10 10% Points add up to the score. Factors without data are left out and the remaining weights are renormalised.