Can we rebuild it?

Can we rebuild Granola Companion?

Build a Chrome extension like Granola Companion — a Granola Companion alternative you own.

If you want to build your own Granola Companion, creating a tailored Chrome extension is a straightforward alternative. Instead of routing your meeting notes through another paid startup's servers, you can connect directly to Google Calendar and your preferred LLM to capture, transcribe, and structure your meeting notes automatically.

The listing record

What Granola Companion does

Browser extension for Granola meeting notes.

What the store says

★ 4.6 from 19 ratings · 90K users

Pulled live from the Chrome Web Store listing at analysis time.

Can PlugThis rebuild Granola Companion?

What you'd plug into

Why build your own Granola Companion alternative

• Zero subscription fees using your own AI API keys
• Meeting notes saved straight to Notion, Obsidian, or Google Docs
• Complete privacy without third-party servers storing meeting transcripts
• Custom summary templates tailored to your specific meeting style

What it costs vs what you'd save

The starter prompt

Build a meeting companion Chrome extension that integrates with Google Calendar and Google Meet. When on a Google Meet tab, provide a side panel that fetches the meeting context, allows live audio capture via chrome.tabCapture, and sends audio chunks to OpenAI Whisper. Once the call ends, summarize key decisions and action items with GPT-4o and save the formatted markdown note to Supabase.

Features you could add that Granola Companion doesn't have

Because you own the code, these are a follow-up prompt away — tap one to add it to the prompt above.

• Direct Notion Sync — Instantly create a new formatted page in your personal Notion workspace after each call.
  + add to prompt
• Action Item Extractor — Automatically parse follow-up tasks and push them to Todoist or Google Tasks.
  + add to prompt

Questions about rebuilding Granola Companion

How to build it yourself

1. 1
   Open PlugThis and start a new build

   Head to PlugThis and start a new Chrome extension. You're describing a Granola Companion alternative you'll own outright — no store subscription.

2. 2
   Paste the starter prompt

   Paste the starter prompt above. PlugThis expands it into a full Manifest V3 extension — popup, content scripts, and service worker included.

3. 3
   Connect your own keys

   Wire in Google Calendar API, OpenAI Whisper & GPT-4o, Supabase using your own account — the build uses your credentials, so there's no per-seat fee.

4. 4
   Review, tweak, and load it

   Review the generated code, ask for tweaks in plain English, then download and load the unpacked extension in Chrome to try it.

5. 5
   Publish it (optional)

   When you're happy, publish your Granola Companion alternative to the Chrome Web Store — or just keep it as a private tool for yourself.

More teardowns

We run the same teardown on any Chrome extension — what it does, whether a self-built alternative holds up, and the prompt to make one. Tear down another extension, or see the extensions we've actually rebuilt and filmed — real build times, real prompts, real recordings.