In this article
The short answer
Grammarly and LexiLint serve different stages of a workflow. Grammarly offers writing assistance across supported apps and websites. LexiLint checks the rendered text on live, staging, and localhost pages that Chrome allows the extension to access.
Use a writing assistant while drafting. Use LexiLint when you want an on-demand review of the page as a reader sees it. The tools can be used together.
What each tool does
LexiLint
- Checks rendered page text on demand
- Designed for live, staging, and localhost pages
- Runs spell checking on the device
- Offers optional BYOK AI grammar
- Highlights possible issues on the page
- Includes a custom dictionary
- US and UK English variants free; six additional languages in Premium
- Offers an open-source MCP server
Grammarly
- Provides suggestions while users write
- Works across supported apps and websites
- Offers spelling, grammar, tone, and clarity features
- Provides desktop and browser products
- Offers individual and business plans
The practical distinction is timing: Grammarly is primarily a writing assistant, while LexiLint is an on-demand proofreader for the rendered page.
Privacy and text processing
Grammarly
Grammarly processes user content to provide its cloud-based product features. Its official privacy policy explains current data categories, purposes, safeguards, and controls.
LexiLint
Spell check: Runs on the device without uploading page text.
Grammar check: Sends selected page text directly to the provider configured with the user's API key. Provider policies apply. Ignite App does not receive or store that page text.
Choose based on the data flow you need. Review the LexiLint privacy policy and Grammarly's official policy before checking sensitive content.
Pricing
LexiLint
- Free tier: US and UK English spell checking plus Gemini BYOK support.
- Premium: Six additional languages plus OpenAI and Anthropic BYOK support. Current site pricing is $29.99 lifetime or $2.99 monthly.
AI provider accounts, availability, limits, and charges are separate from LexiLint.
Grammarly
Grammarly offers free and paid plans. Plan names, features, and prices can change; see Grammarly's official plans page for current details. Pricing sources were reviewed in September 2026.
Full feature comparison
| Capability | LexiLint | Grammarly |
|---|---|---|
| Primary workflow | On-demand review of rendered pages | Writing assistance across supported apps and websites |
| Live, staging, and localhost pages | Designed for pages Chrome lets the extension access | Availability depends on Grammarly's supported surface |
| Spell-check processing | On the device | Through Grammarly's product services |
| AI provider choice via BYOK | Gemini; Premium adds OpenAI and Anthropic | Not a BYOK product |
| Suggestions while typing | No | Yes, on supported surfaces |
| Custom dictionary | Yes | Yes |
| MCP server | Open-source LexiLint MCP package | Not identified in Grammarly's product materials reviewed |
Grammarly product details can change. Review its official plans page and privacy policy for current information.
Which workflow fits?
Grammarly You want suggestions while drafting
Grammarly is designed to provide writing assistance across supported apps and websites.
LexiLint You want to review the rendered page
LexiLint checks visible page text on demand, including live, staging, and localhost pages that Chrome allows it to access.
LexiLint You need offline spell checking
LexiLint's spell-check operation stays on the device. Optional AI grammar is separate and sends text to the provider configured by the user.
LexiLint You use an MCP-compatible client
The open-source LexiLint MCP package provides local spell checking and optional BYOK grammar to compatible clients.
LexiLint in MCP-compatible clients
The LexiLint MCP package exposes spell and grammar tools to compatible clients such as Claude Desktop and Cursor.
What this changes
The spell_check tool uses a local dictionary, so the spell-check operation does not consume model input or output tokens.
Optional grammar checking still uses the provider key configured by the user.
LexiLint MCP is listed in the MCP registry. Client support and configuration can change; consult each client's current documentation.
Verdict
Choose based on the stage of work. Grammarly is primarily a writing assistant. LexiLint is an on-demand proofreader for rendered pages.
Use Grammarly when you want suggestions while drafting on supported surfaces. Use LexiLint when you want to review a live, staging, or localhost page as rendered.
Different tools for different stages of publishing.
US and UK English spell check included · Optional Gemini BYOK grammar