Vale vs textlint vs Lint: Choosing the Right Prose Linter for Your Docs

Introduction

Technical writing is code. Whether you're crafting API docs, internal wikis, or commit messages, clear, consistent language prevents bugs in understanding. But just as you lint your code, you should lint your prose. Enter prose linters: tools that automatically check your writing for style violations, grammar errors, and terminology inconsistencies. Three popular options among developers are Vale, textlint, and Lint. All three integrate into development workflows, but they differ in philosophy, setup, and capabilities. This comparison will help you choose the right one for your team.

Why Prose Linting Matters for Developers

Developers write a lot: READMEs, changelogs, error messages, UI copy, and more. Inconsistent tone or typos can erode trust in your product. A prose linter acts like an automated reviewer, catching mistakes before they reach production. It enforces a style guide (like Google's or your own) across all contributors, ensuring that your documentation speaks with one voice. Plus, integrating a linter into CI/CD means no pull request gets merged with embarrassing grammar slip-ups.

Meet the Contenders: Vale, textlint, and Lint

Vale is an open-source, syntax-aware linter for prose written in Go. It's highly configurable and supports a wide range of built-in style guides. Vale became the de facto choice for many developer documentation sites because of its speed and flexibility.

textlint is a pluggable linting tool for text and markup, built in JavaScript. It uses a modular rule system, so you can pick exactly what to check. textlint is popular in the Japanese tech writing community and has a strong ecosystem of plug-ins.

Lint is a newer, developer-centric prose linter that focuses on simplicity and team collaboration. It offers a web dashboard for managing styles, real-time editor feedback, and AI-powered suggestions. Lint aims to lower the barrier for teams that want a polished linting setup without spending hours on configuration.

Feature Comparison

The table below summarizes key differences. (Note: features are accurate as of early 2025; check each tool’s site for the latest.)

| Feature | Vale | textlint | Lint |
|-----------------------|--------------------------------|-----------------------------------|------------------------------------|
| Type | CLI + library | CLI + library | SaaS + CLI + IDE extensions |
| Open Source | Yes (MIT) | Yes (MIT) | No (freemium) |
| Configuration | .vale.ini file, YAML styles | .textlintrc file, JSON | Web dashboard or .lintrc.yml file |
| Built-in Styles | Microsoft, Google, proselint, | No built-in styles; all via | Pre-built styles for common needs |
| | write-good, and many more | plugins (e.g., preset-* packages) | (Google, Microsoft, custom) |
| Custom Rules | Yes, via YAML or Go | Yes, via JavaScript | Yes, via dashboard or YAML |
| Editor Integration| VS Code, Vim, Sublime, etc. | VS Code, Atom, CLI, etc. | VS Code, JetBrains, Vim |
| CI/CD Support | Native GitHub Action, Docker | Custom via CLI | GitHub Action, GitLab CI, Docker |
| AI Features | None | None | Spelling & tone suggestions (GPT) |
| Team Collaboration| Possible with shared styles | Possible with shared configs | Built-in team dashboard, roles |
| Pricing | Free | Free | Free for individuals; paid teams |

In-Depth: Vale – The Extensible Workhorse

Vale is the oldest and most battle-tested of the three. Its killer feature is style inheritance: you can combine multiple style guides and even override individual rules. For example, you can use the Google Developer Documentation Style Guide as a base and then relax certain rules with your own. The configuration lives in a .vale.ini file, and styles are just YAML files – perfect for version control.

Vale shines in large open-source projects. It's fast (written in Go), and it doesn't require Node.js, which keeps a lean environment. The built-in styles cover everything from “write-good” (plain English) to “proselint” (advanced checks) to vendor-specific guides. Setting up CI with the official GitHub Action is a one-line change.

On the downside, Vale can feel overwhelming at first. The documentation is comprehensive but dense, and crafting custom rules requires learning its YAML syntax. If you just want a quick start, you'll need to invest some time.

In-Depth: textlint – The Pluggable Grammar Guardian

textlint takes a modular approach: the core is a simple rule engine, and you install only the rules you need. This keeps the setup lightweight and avoids bloat. It works with plain text, Markdown, AsciiDoc, and more. Because rules are JavaScript packages, they're easy to share on npm. Popular presets like textlint-rule-preset-ja-technical-writing (for Japanese technical writing) show its strong community roots.

textlint fits well if you already use Node.js in your pipeline and prefer a JavaScript-centric tool. Its plugin system is flexible: you can write custom fixers, filters, and even integrate with other text-processing libraries. The CLI is straightforward, and integration with editors like VS Code is seamless.

However, textlint's lack of built-in styles means you must curate your rule set from scratch. For teams without a dedicated technical writer, assembling a good configuration can be time-consuming. Also, the JavaScript ecosystem means occasional dependency issues and higher memory usage compared to Vale.

In-Depth: Lint – The Developer-Centric Newcomer

Lint enters the scene with a fresh perspective: prose linting should be as easy as installing a GitHub app. It combines a SaaS platform with a CLI and editor plugins, offering a managed experience. You define your style guide in a web dashboard, and Lint syncs it across your repositories. It includes a growing set of pre-built styles and an AI-powered assistant that suggests rewrites for clarity, tone, and grammar.

For teams, Lint's collaboration features are a standout. You can assign roles, review flagged issues, and even define organization-wide terminology. The dashboard shows linting health over time, giving you a bird's-eye view of documentation quality. The VS Code extension provides real-time underlines and quick fixes, similar to a spellchecker.

Because Lint is newer, its ecosystem is smaller. It may lack some niche rules that Vale or textlint have accumulated over years. Moreover, the free tier is generous but limited to individual use; team pricing can be a factor for larger organizations. Still, if you want a polished, low-maintenance setup with modern AI features, Lint is worth a serious look.

Which One Should You Choose?

Your choice boils down to your team's existing tooling and how much control you want.

- Choose Vale if you need maximum flexibility, already version-control everything, and don't mind spending time on configuration. It's ideal for open-source projects and teams that want to combine multiple style guides.
- Choose textlint if you prefer a JavaScript-based tool, need a plug-and-play rule system, or work with Japanese text. It's great for developers who are comfortable curating their own rule set.
- Choose Lint if you want a guided, low-effort setup with built-in collaboration and AI features. It's perfect for startups and teams that value a visual dashboard and don't want to manage configuration files manually.

All three tools will improve your documentation; the best one is the one your team will actually use consistently.

Conclusion

Vale, textlint, and Lint represent three different philosophies in the prose linting space: community-driven extensibility, modular plug-and-play, and managed simplicity. We encourage you to try a short proof of concept with a small documentation set. Run the same content through each tool and see which feedback style your writers prefer. After all, a linter is only helpful if it integrates into your daily flow without adding friction.

*Happy linting!*