LanguageTool records 5,707,795 monthly visits with -4.2% month-over-month growth and Freemium pricing. Openlayer records 48,415 monthly visits with -6.4% growth and Freemium, Contact for Pricing pricing.
AI grammar, spelling and style checker for 30+ languages
AI governance, testing, and observability for regulated enterprises
| Dimension / Metric | | |
|---|---|---|
| Official Domain | languagetool.org | openlayer.com |
| Pricing Model | Freemium | Freemium, Contact for Pricing |
| Monthly Visits | 5.71M (5,707,795) | 48.42K (48,415) |
| MoM Traffic Delta | -247.26K (-4.2%) | -3.3K (-6.4%) |
| Primary Market & Share | 🇧🇷 Brazil (13.8%) | 🇺🇸 United States (44.1%) |
| Direct Visits / mo | 3.23M | 25.94K |
| User Rating | 4.3 | 4.4 |
| Supported Platforms | Website | Website |
AI grammar, spelling and style checker for 30+ languages
Detects grammatical errors, typos, punctuation issues and casing mistakes across 30+ languages.
Rephrase any sentence to be more formal, fluent, simple or concise with AI-driven suggestions.
Browser add-ons plus Google Docs, Word, LibreOffice, Gmail and Outlook integrations, and desktop apps.
Advanced suggestions flag overused phrases, redundancy and wording that weakens your text.
AI governance, testing, and observability for regulated enterprises
Dozens of pre-built evaluations cover quality, safety, security, and performance, with LLM-as-a-judge scorers, session-level metrics, and support for writing your own custom tests against your own data.
Import a repository and run evaluation suites automatically on every change, benchmark each iteration, and block releases when a metric regresses beyond the threshold you define.
Trace every request through multi-step agent workflows, including tool calls and retriever steps, with token counts, latency, cost per request, alerting integrations, and subpopulation analysis.
Register each AI system with an owner, purpose, data sensitivity, and risk tier, score inherent risk across multiple dimensions, and move systems through staged approval gates before they reach production.
SpecialistEnterprise-grade neural machine translation, AI writing refinement, and real-time voice translation across thirty-plus global languages.
SpecialistEnterprise-grade neural machine translation, AI writing refinement, and real-time voice translation across thirty-plus global languages.
A premier cross-platform writing assistant offering robust real-time grammar checks, tone alignment, and style suggestions.
A premier cross-platform writing assistant offering robust real-time grammar checks, tone alignment, and style suggestions.
SpecialistAn AI writing assistant specializing in advanced paraphrasing and text rewriting alongside built-in grammar checks.
SpecialistAn AI writing assistant specializing in advanced paraphrasing and text rewriting alongside built-in grammar checks.
SpecialistAcademic proofreading, plagiarism checking and AI-powered writing tools in one place
SpecialistAcademic proofreading, plagiarism checking and AI-powered writing tools in one place
A comprehensive writing enhancement platform combining deep style analysis with line-level grammar and spelling correction.
A comprehensive writing enhancement platform combining deep style analysis with line-level grammar and spelling correction.
SpecialistAI translation for text, images, documents and speech in 100+ languages
SpecialistAI translation for text, images, documents and speech in 100+ languages
SpecialistAI academic writing assistant that edits, cites, and checks your manuscript right where you write
SpecialistAI academic writing assistant that edits, cites, and checks your manuscript right where you write
SpecialistA web-based writing tool that highlights readability issues, complex sentences, and style flaws in draft text.
SpecialistA web-based writing tool that highlights readability issues, complex sentences, and style flaws in draft text.
An AI writing assistant focusing on sentence paraphrasing, tone adjustment, and grammar correction for everyday communication.
An AI writing assistant focusing on sentence paraphrasing, tone adjustment, and grammar correction for everyday communication.
Free / Open-sourceAgent observability, evaluation, and continuous improvement for production AI
Free / Open-sourceAgent observability, evaluation, and continuous improvement for production AI
SpecialistA privacy-first writing and grammar assistant tailored specifically for academic and technical document proofreading.
SpecialistA privacy-first writing and grammar assistant tailored specifically for academic and technical document proofreading.
A streamlined AI writing assistant and grammar checker correcting spelling, punctuation, and style across browsers.
A streamlined AI writing assistant and grammar checker correcting spelling, punctuation, and style across browsers.
