Lint vs Grammarly vs LanguageTool: Best Grammar Tool for Developers

Introduction

As a developer, you spend almost as much time writing *about* code as you do writing code itself. From README files and API docs to commit messages and Slack updates, clear, error-free English is crucial. But traditional grammar tools often feel clunky or ignore the unique needs of a technical audience. That’s where specialised writing assistants come in.

In this post, we’ll compare three popular options: Lint, a purpose-built grammar linter for developers; Grammarly, the household name in writing enhancement; and LanguageTool, an open-source, privacy-focused alternative. Each has its own strengths, but which one deserves a spot in your toolchain? We’ll look at features, developer experience, pricing, and more to help you decide.

Quick Comparison Table

| Feature | Lint | Grammarly | LanguageTool |
|------------------------------|-------------------------------|-------------------------------|--------------------------------|
| Developer focus | Built for devs & docs | General writing | Broad, with tech rules |
| API / SDK | First-class REST & CLI | Grammarly Text Editor SDK | HTTP API (self-host option) |
| Editor integrations | VS Code, JetBrains, Neovim | Browser, Desktop, MS Office | Browser, Desktop, many editors |
| Grammar & style | Technical + plain English | Advanced AI, tone adjustments | Rule-based, 20+ languages |
| Paraphrasing | Minimal, inline suggestions | Full sentence rewrites | Basic synonym replacement |
| Privacy / Offline | Cloud, optional on-prem | Cloud-only | Cloud or self-hosted |
| Pricing (individual) | Free tier, Pro from $8/mo | Free, Premium $12/mo | Free, Premium from $5/mo |

Lint: Grammar Linting for the Development Workflow

Lint is designed from the ground up for developers. Think of it as an ESLint for your English prose — it scans markdown, comments, and strings inside your codebase and flags grammatical errors, passive voice, and jargon that could confuse readers. Its tight integration with IDEs like VS Code and JetBrains means you can correct mistakes without switching context.

Key highlights

- API-first approach: Lint provides a REST API that you can pipe into CI/CD pipelines, so documentation PRs get grammar checks automatically. It also offers a CLI for local pre-commit hooks.
- Technical writing rules: Understands common developer mistakes like misusing “it’s” vs. “its” in docstrings, or overusing passive voice in technical specs.
- On-premises option: For teams with strict data policies, Lint can be deployed on your own infrastructure.

Lint’s paraphrasing capabilities are still evolving; it currently offers simple rewording suggestions rather than the rich rewriting features of Grammarly. But for developers who need a linting-style assistant that fits into their existing workflow, Lint hits the sweet spot.

Grammarly: The Polished All-Rounder

Grammarly is the most widely used writing assistant, and for good reason. Its slick user interface and powerful AI engine catch everything from typos to tone inconsistencies. While it wasn’t built for developers specifically, its browser extension works on virtually any web-based text area — including GitHub, Jira, and Confluence — and the desktop app covers Markdown files, emails, and more.

What developers will like

- Tone detection and clarity: Grammarly can suggest more confident or friendly phrasing, which is handy for client-facing communication.
- SDK for custom integrations: The Grammarly Text Editor SDK lets you embed its proofreading into your own web apps, though it’s not as straightforward as a pure API.
- Wide language coverage: American, British, Canadian, and Australian English variants.

However, Grammarly’s cloud-only architecture means all text is processed on its servers, a dealbreaker for some teams. Its paraphrasing is top-notch, but developers may find it overly prescriptive for technical docs. And while it has a free tier, many of the advanced features (full-sentence rewrites, plagiarism checker) require a Premium subscription.

LanguageTool: The Open-Source Contender

LanguageTool stands out for its commitment to open source and privacy. It started as a rule-based engine and now includes AI-driven suggestions for more than 20 languages. Developers can self-host the entire stack, making it a go-to choice for organisations that can’t send text to third parties.

Strengths for devs

- Self-hosting: Run your own LanguageTool server behind your firewall. The Docker image is easy to set up, and the API is well-documented.
- Broad language support: If you maintain multilingual documentation, LanguageTool’s 20+ languages (including English, German, French, Spanish) are invaluable.
- Community rules: You can write custom grammar rules in XML, similar to writing a custom linter rule.

On the downside, LanguageTool’s natural language processing isn’t as sophisticated as Grammarly’s AI. Its paraphrasing is limited to basic synonyms, and the UI — while functional — feels less polished. It also lacks dedicated features for technical writing patterns, though you can build them yourself.

Feature Breakdown: Where Each Tool Shines

Grammar Accuracy

- Grammarly: Trained on massive datasets; excels at nuanced grammar and style.
- Lint: Strong on common developer errors; less comprehensive in creative or conversational English.
- LanguageTool: Solid rule-based accuracy, but may miss context-dependent mistakes that AI catches.

Developer Integration

- Lint: Unmatched. CLI, REST API, first-class editor plugins, and CI/CD support make it a natural part of the code review process.
- Grammarly: Browser and desktop apps are great, but the SDK is primarily for web embedding; no official CLI or pipeline integration.
- LanguageTool: The API and self-hosted server are excellent for custom tooling; integrations exist for many editors, but you’ll need to configure them.

Privacy & Control

- LanguageTool: Best in class with fully on-premises deployment.
- Lint: Offers on-prem as a paid add-on; cloud version uses encryption and allows data retention controls.
- Grammarly: All text goes through Grammarly’s cloud; not suitable for sensitive code comments or proprietary docs.

Paraphrasing & Suggestions

- Grammarly: Deep rewriting capabilities, tone adjustments, and fluency edits.
- LanguageTool: Simple synonym swaps; no structural rewrites.
- Lint: Focused on correctness over style; avoids altering meaning in technical sentences, which is often preferred.

Pricing: Bang for Your Buck

All three tools offer free tiers, but their paid plans unlock different value for developers.

- Lint Free includes basic grammar checks in the editor and CLI. The Pro plan ($8/user/month) adds the API, pipeline integration, and team management. On‑prem is priced separately.
- Grammarly Free catches critical errors; Premium ($12/month) enables full-sentence rewrites, tone detection, and plagiarism. Business plans are $15/user/month.
- LanguageTool Free gives you basic checks; Premium ($5/month or self-hosted) raises character limits and enables style suggestions. Self-hosting the server is free (open source) but requires infrastructure.

For individual developers, LanguageTool offers the most affordable path if you can self-host. Lint’s Pro plan is competitive when you need API access and CI/CD integration. Grammarly’s premium is the priciest, but its polished UX may justify the cost for teams that value a couple of minutes saved per message.

Which One Should You Choose?

Your choice depends on your primary use case:

- Pick Lint if your writing lives inside a codebase. You want a tool that lints READMEs, comments, and Markdown in your editor, with the option to enforce grammar in CI. It’s the most developer-native option and feels like an extension of your existing linter setup.
- Pick Grammarly if you need a frictionless, do-it-all writing assistant across email, Slack, and documents. Its rewriting suggestions are the best in the business, and the browser extension just works everywhere. Be mindful of the privacy trade-off.
- Pick LanguageTool if you prioritise privacy, need multiple languages, or want an open-source solution you can customise and host yourself. It’s the most flexible, but the out-of-the-box technical writing support is weaker.

Final Verdict

There’s no single “best” — each tool excels in different areas. For many developer teams, a layered approach works well: use Lint for docs and code comments, Grammarly for client communication, and LanguageTool as a fallback when you need self-hosting or multilingual checks. However, if you’re looking for one tool that genuinely understands a developer’s workflow, Lint deserves a hard look. It won’t replace a full‑fledged writing coach, but as a grammar linter for your codebase, it delivers exactly what it promises.

We recommend trying the free tiers of all three on your real work. A side-by-side test with your typical documentation and messages will quickly show which assistant catches your most common mistakes and fits your flow.