How do their growth rates compare?

RewriteBar has a month-over-month growth rate of +6%; Write Brain has 0%.

How does pricing compare?

RewriteBar: Freemium, Free Trial, Paid. Freemium with a free trial, then one-time licences. Try it free with 35,000 credits and no credit card; Standard is $29 one-time (1 device, 35,000 credits, BYOK and local models); Pro is $59 one-time (3 devices, 1 year of RewriteBar Gateway with 3 million monthly credits). Extra devices cost $19 one-time, and the RewriteBar Gateway can be bought separately for $40 per year. Refunds available within 14 days. Write Brain: Freemium. Freemium. The extension is free to install from the Chrome Web Store, and the store listing indicates in-app purchases are available for paid features or higher usage limits.

What are alternatives to RewriteBar and Write Brain?

Other tools in related categories include Grammarly, QuillBot Paraphraser, LanguageTool, Sider, Wordtune.

RewriteBar vs Write Brain — Traffic (26.29K vs 0), Pricing & Verdict

Open AI Tools

RewriteBar vs Write Brain — Traffic (26.29K vs 0), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	RewriteBar	Write Brain
Official Domain	rewritebar.com	writebrain.io
Pricing Model	Freemium, Free Trial, Paid	Freemium
Monthly Visits	26.29K (26,294)	0 (0)
MoM Traffic Delta	+1.48K (+6%)	0 (0%)
Primary Market & Share	🇺🇸 United States (42.4%)	🌐 Global (—)
Direct Visits / mo	8.61K	0
User Rating	4.3	4.1
Supported Platforms	Website	Website

RewriteBar

macOS AI writing assistant that works inside any app

Works in any application

RewriteBar captures the selected text system-wide and pastes the improved version back, so it functions in Chrome, Google Docs, Word, Slack, Notion, VS Code, email clients and more.

Preset and custom AI actions

Use built-in commands such as fix grammar, simplify, humanize, summarise, title case, fix JSON, create ASCII art or translate, or author your own commands with variables and prompt libraries.

Chain actions into workflows

Combine several actions to transform text step by step — for example expand, add emojis, translate and rewrite a title in one flow.

Cloud or fully local models

Bring your own API key from major providers, use the RewriteBar Gateway, or keep everything on-device with Ollama, LM Studio, oMLX or Apple Intelligence.