vs
Glasp's YouTube Summary extension vs Signal Extractor
Glasp's "YouTube Summary with ChatGPT & Claude" is a browser extension that drops a transcript and summary panel onto the YouTube page, capped at three summaries a day on the free plan.
The short answer
Glasp's extension earned its install count: it puts the transcript right next to the video, works across most browsers, and lets you choose which model writes the summary. Its free reputation is out of date, though. You get three summaries a day, and when a video has no captions the audio-transcription fallback is metered at 30 minutes a month — a single lecture eats it. You also have to install an extension, and the quality of what you read depends on which model account you've wired up. Signal Extractor needs nothing installed and no account, has no daily cap, and handles captionless videos without a minutes budget. You get a one-line verdict then five to eight timestamped takeaways in about ten seconds, follow-up chat with the transcript in context, Notion export, and an email digest of new videos from channels you follow.
Feature by feature
19
Signal Extractor wins
5
Tied
5
Glasp wins
| Price & limits | Signal Extractor | Glasp |
|---|---|---|
| Price to summarize | Free | Free tier, then paid |
| Summaries per day, free | No limit | 3 |
| No account needed | Yes | No |
| No extension to install | Yes | No |
| Videos with no captions | Yes | Limited |
| Transcription minutes metered | No | 30 min/month |
| Any video length | Yes | Limited |
| No subscription | Yes | No |
| The summary | Signal Extractor | Glasp |
| Timestamped key takeaways | Yes | Yes |
| Clickable timestamps | Yes | Yes |
| One-line verdict up top | Yes | No |
| Works the same for everyone | Yes | No |
| No model account to wire up | Yes | No |
| Instant or deeper reasoning | Yes | Limited |
| Transcript beside the video | No | Yes |
| Choose your own AI model | No | Yes |
| Custom summary prompt | No | Yes |
| After the summary | Signal Extractor | Glasp |
| Follow-up chat on the video | Yes | Limited |
| Chat can search the web | Yes | No |
| Channel follow + email digest | Yes | No |
| X (Twitter) posts too | Yes | No |
| Save to Notion | Yes | Yes |
| Public share link | Yes | Limited |
| Copy as markdown | Yes | Yes |
| Public summary library | Yes | No |
| Platform | Signal Extractor | Glasp |
| Works with nothing installed | Yes | Limited |
| Chrome extension | Yes | Yes |
| Firefox & Safari extensions | No | Yes |
| Also summarizes web pages and PDFs | No | Yes |
Glasp details taken from their own site and public documentation, checked August 2026. Their features and limits change — check theirs for today's details. Logos and product names are trademarks of their respective owners, shown here to identify the products compared.
Which should you use?
Use Signal Extractor if
You want more than three summaries a day, nothing installed, no account, and captionless videos handled without a monthly minutes budget.
Use Glasp if
You want the transcript pinned beside the video while you watch, you use Firefox or Safari, or you want to pick which model writes the summary.
Glasp questions
Is the YouTube Summary with ChatGPT extension really free?
Free to install, but the free plan is three summaries a day, and the audio transcription it uses for videos without captions is capped at 30 minutes a month. Beyond that it's a paid plan. Signal Extractor has no daily cap and no minutes budget.
What's the best free alternative to Glasp's YouTube Summary extension?
Signal Extractor, if you'd rather not install anything. Paste a YouTube link in the browser and get a one-line verdict plus timestamped takeaways in about ten seconds, with no account and no daily limit.
Do I need a ChatGPT or Claude account to use it?
For Glasp's extension, the summary quality depends on which model you connect, and some routes push the transcript into your own ChatGPT tab. Signal Extractor runs on Gemini 2.5 Flash on our side, so there's nothing to connect and the output is the same for everyone.
Does it work on videos with no captions?
Partly. Glasp can transcribe the audio, but only 30 minutes' worth a month on the free plan. Signal Extractor falls back to the audio with no monthly ceiling.
Which one is better while I'm watching a video?
Glasp, genuinely — the panel sits beside the player with the transcript in it, which is nice if you're following along. We're built for the decision before that: is this video worth the hour at all, and if so, which ten minutes.
Can I use it in Firefox or Safari?
Glasp's extension covers Chrome, Firefox, Safari, Edge, Brave and Opera. Our extension is Chrome-only, but the site itself works in any browser with nothing to install, which is why the extension is optional.
Try it on the video you were about to watch
Paste a YouTube link and read the takeaways in about ten seconds. No account, no extension, no card.
Summarize a video