Laying out the streets…STEP 1 OF 3

ShroomPen · House #22,644

Reply, rewrite, fix grammar, translate with single extension

In the General-purpose AI assistants neighborhood (AI and agents). In town since 25 Sept 2026.

Nobody has claimed this house yet. Tablif records every new product and gives it a house; when its owner claims it, the lights go on.

Is this yours? Claim it

What Tablif read on ShroomPen's site

ShroomPen describes itself as: “ShroomPen is a privacy-first browser writing assistant that lets you instantly reply, rewrite, fix grammar, or translate text across any website without sending sensitive data to the cloud.”

What it is

Calls itself “browser writing assistant”.

  • Calls itself: browser writing assistant

Where it puts itself

Rules out “ShroomPen account”.

  • Says it will not: ShroomPen account
“It can use the page you’re on, or other pages you pick, so you never have to explain everything again in a separate AI chat.”
“The browser extension has no required ShroomPen account, hosted model, extension telemetry, ads, or ShroomPen server path in v0.”

What it costs

A free tier, free forever. No monthly or yearly plan. No one-time option.

  • One-time: no
  • Monthly: no
  • Yearly: no
  • Free plan: free forever
“LIVE FREE $0”
“FREE $0”

How it runs

A browser extension. Runs locally and works offline. Distributed through the Chrome Web Store. Offers an API. AI is the core of the product. You can bring your own API key.

  • Kind: extension
  • Runs where: on the device, offline
  • Distributed via: Chrome Web Store
  • API: yes
  • AI role: core to the product
  • Bring your own key: yes
“Provider settings stay in Chrome extension local storage, and generation requests go directly from the extension to the endpoint you configure.”
“ADD TO CHROME”

What it works with

Integrates with Anthropic, Gemini, Google Docs and 2 more. Runs inside Chrome.

  • Integrates with: Anthropic · Gemini · Google Docs · +2
  • Runs inside: Chrome
“Connect OpenRouter, OpenAI, Anthropic, Gemini, or an OpenAI-compatible endpoint.”
“Add the Chrome extension.”

What it offers as proof

Live, no waitlist. Try it without signing up.

  • Instant signup: yes
  • Trial asks for: nothing
“ADD TO CHROME”
“Add the Chrome extension.”

Sources

Tablif read these pages, last on 7 Oct 2026. Everything above is what the product says about itself; Tablif does not verify every claim.

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