Yes, it is free with no subscription or ShroomPen account; you use your own AI provider key.

Which AI providers work?

OpenRouter, OpenAI, Anthropic, Gemini, Ollama and LM Studio or any OpenAI-compatible server.

Where does my data go?

Requests go directly from your browser to your chosen provider; there is no ShroomPen backend or telemetry.

Which browsers are supported?

Chrome, via the Chrome Web Store.

Is ShroomPen agent ready?

ShroomPen is not listed as Agent Ready or MCP Native on Maarket.

Who is ShroomPen best for?

ShroomPen is listed as a fit for Solo Founder, Startup, SMB teams.

What are the alternatives to ShroomPen?

Other Others products on Maarket include 10xJoy, Afterglow, AI Toolbox 3.0, AirPods 5, Amazon Alexa Tablets, America.gov.

How is ShroomPen ranked on Maarket?

Purely by Karma Points earned from community actions — reviews, recommends, use signals and clicks. There is no pay-to-rank; sponsor placements are always clearly labeled.

‹ Others

ShroomPen — Free Chrome extension to reply, rewrite, fix grammar and translate text with your own AI key

#5 in Others

⚡ 10 KP · ↗ 0 total clicks

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ShroomPen at a glance

Category: Others
Best for: Solo Founder, Startup, SMB
Agent compatibility: Not listed
Total clicks: 0
Website: shroompen.com ↗
Recommends: 👍 0
I use this: ✋ 0
Reviews: ⭐ 0
Last updated: 29 Sept 2026

Demo & screens

ShroomPen screenshot 1 — ShroomPen · screen 1

About ShroomPen

ShroomPen is a free Chrome extension for practical writing in Gmail, LinkedIn, Google Docs and other web apps. It offers four actions: Reply, Rewrite, Fix Grammar and Translate, using context from the current page and selected tabs. You bring your own key for OpenRouter, OpenAI, Anthropic, Gemini, Ollama or LM Studio. It has no ShroomPen backend, telemetry or account, and a request preview shows what is sent.