What is the main difference between Harper and LanguageTool?

Harper and LanguageTool are both browser extensions but differ in their approach, features, and target audience. Compare their GitHub stats, technology stack, and community adoption to make the best choice.

Which is better: Harper or LanguageTool?

The choice between Harper and LanguageTool depends on your specific needs, technical requirements, and team preferences. Both are quality open source solutions with active communities.

Can I migrate from Harper to LanguageTool?

Migration between Harper and LanguageTool is possible but requires careful planning. Consider data export/import capabilities, feature parity, and potential workflow changes.

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Harper vs LanguageTool

Learn how Harper and LanguageTool differ in their key features, development activity, technology stack and community adoption, so you can decide which of these browser extensions is best for you.

Harper

Open source grammar checker that analyzes your writing quickly while keeping your data completely private and secure on your device.

Visit Harper Read more

16,831stars+1,094(+7%)

Last 30 days

Last commit
7 hours ago
Repository age
3 years
Version
v2.13.0
License
Apache-2.0
Repository
automattic/harper

LanguageTool

Check grammar, punctuation, and spelling errors instantly with AI-powered technology. Supports 30+ languages with browser extensions and desktop apps.

Visit LanguageTool Read more

15,163stars+105(+0.7%)

Last 30 days

Last commit
20 hours ago
Repository age
13 years
License
LGPL-2.1
Self-hosted
Yes
Repository
languagetool

Detailed Comparison

Both Harper and LanguageTool have their unique strengths and serve similar purposes effectively. Consider your specific needs regarding popularity, growth, activity, technology, maturity, licensing and features when making your decision.

Comparable

Community & Popularity

Both tools have similar popularity levels, with Harper having 16,831 stars and LanguageTool having 15,163 stars on GitHub. In terms of developer contributions, LanguageTool has 1,590 forks, indicating strong developer engagement.

Harper wins

Growth Momentum

Harper is growing faster, adding 1,094 stars in the last 30 days (+7%) against adding 105 stars for LanguageTool (+0.7%). Harper is both larger and pulling further ahead.

Comparable

Development Activity

Both projects show recent activity, with Harper last updated 7 hours ago and LanguageTool 20 hours ago.

Comparable

Technology Stack

Both tools share common technology foundations, being built with CSS, Bash. However, they differ in their additional technology choices: Harper uses JavaScript, Typescript, JSX, Rust, PHP, SvelteKit while LanguageTool leverages Python, Java, Perl.

LanguageTool wins

Project Maturity

LanguageTool has been in development longer, starting 13 years ago, compared to Harper which began 3 years ago. This 10.4-year head start suggests LanguageTool may have more mature features and established processes.

Comparable

Licensing

The projects use different licenses: Harper is licensed under Apache-2.0 while LanguageTool uses LGPL-2.1. Consider the licensing requirements when choosing for your project.

Comparable

Use Cases & Features

Both tools serve similar use cases in Browser Extensions.

LanguageTool wins

Hosting & Deployment

LanguageTool provides self-hosting options for complete data control and customization, while Harper may be primarily cloud-based or require different deployment approaches.