Typerighter

Self-hosted · API

Freedom report

Two barsScore 6.3

Free tierA free tier is on its own pricing page
Runs widely0 of 6 device platforms
DocumentedPlans, terms and facts published

Typerighter is ranked #14 of 30 in writing style checkers on Freedom251. It runs on API, Self-hosted. There is a free plan.

Typerighter plans and pricing

All plans

Open source Free Apache-2.0 licensed software · requires deployment and configuration github.com · 9 Oct 2026

Compared on writing style checkers

Custom style guide: Yes
Editor support: ProseMirror
Rule action: suggest
Team workflow: Yes
API access: Yes

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The record

Purpose: Typerighter checks documents against user-defined rules and is designed to work like a spelling or grammar checker.
Guardian use: The Guardian uses Typerighter to check content against its style guide.
Rule types: Its rules include user-defined regular expressions, user-defined LanguageTool XML patterns, and predefined LanguageTool core rules.
Match details: Matches include the applicable text range, an explanation, and relevant suggestions.
Rule management: The Rule Manager maintains the rule corpus and publishes it as an artifact consumed by the Checker service.
Document checking: The Checker service accepts document check requests and returns matches from the rule corpus.
Integration: The prosemirror-typerighter plugin integrates Typerighter with the ProseMirror rich text editor and lets users review suggestions and apply changes.
REST access: Typerighter can function as a standalone REST platform, and requests require a valid pan-domain authentication cookie.
Deployment assumptions: The repository assumes AWS cloud services, defaults to the eu-west-1 region, and uses the Guardian's riff-raff deployment platform.
Technology: The Checker and Rule Manager are Scala services built with the Play framework, and the Rule Manager stores data in PostgreSQL.
License: The repository is published under the Apache-2.0 license.
Intended users: The documented roles are rule owners who maintain rules and rule users who check copy against them.
Project goal: The project vision describes a document proofing service intended to be available wherever authors write and easy to integrate into applications.
Two services: Typerighter consists of a Rule Manager that manages and publishes rules and a Checker that checks copy against them.
Price from: Free

Where it ranks on Freedom251

Best Writing Style Checkers in 2026#14 of 30

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Sources

github.com/guardian/typerighter· checked 9 Oct 2026
github.com/guardian/prosemirror-typerighter· checked 9 Oct 2026
github.com/guardian/typerighter/blob/main/vision.m· checked 9 Oct 2026
theguardian.com/help/insideguardian/2020/nov/20/introdu· checked 9 Oct 2026