Eightify Alternative — Build Your Own YouTube Summarizer
Eightify is a great product if you want a polished YouTube summarizer that works out of the box. If you'd rather own your tool, use your own API keys, customize the summary format, and avoid usage limits, building your own with PlugThis is the alternative.
About Eightify
Eightify is a Chrome extension that uses AI to summarize YouTube videos into key points. It pulls the video transcript, sends it to an AI model, and produces structured summaries with timestamps. Eightify is one of the most popular YouTube summarization extensions.
Pricing: Eightify uses a freemium model with a limited free tier and paid plans starting at around $5/month for higher usage limits. Lifetime deal versions have appeared on deal sites at various price points.
Audience: Researchers, students, and busy knowledge workers who watch educational YouTube content and need to gauge relevance quickly.
PlugThis vs Eightify
| Feature | PlugThis | Eightify |
|---|---|---|
| Pricing | $89 one-time (lifetime) | Freemium, ~$5/mo for paid tier |
| Free tier | Yes — try before paying | Yes, with usage limits |
| AI provider | Bring your own keys | Eightify-managed |
| Source code access | Full source | Closed |
| Where it runs | YouTube + any other video site you describe | YouTube only |
| Custom output formats | Whatever you ask for | Pre-defined formats |
| Privacy | Direct to your AI provider | Eightify backend |
| Polish out of the box | You build the UI | Polished UI ready |
What Eightify does well
- Polished UI integrated directly into the YouTube page
- Reliable summary quality across video lengths
- Fast — caches summaries so revisits are instant
- Active product with regular updates and new features
Build it yourself with PlugThis
Build time: Under 5 minutes
What you get:
- Full control over summary format — change the prompt to get exactly what you want
- Bring your own OpenAI key — no subscription, no usage limits beyond your API spend
- Extends to other video platforms (Vimeo, Loom) by tweaking the prompt
- Privacy: video data goes from your browser to your chosen AI, not through Eightify's servers
- Open source extension you can share or modify for your team
- Lifetime ownership — no monthly bill ever
Build a Chrome extension called "Video Summary AI" that summarizes YouTube videos. The extension should: (1) detect when the user is on a YouTube video page (https://www.youtube.com/watch*), (2) inject a "Summarize" button next to the like button, (3) when clicked, fetch the video transcript using YouTube's transcript API (or scrape from the transcript panel), (4) send the transcript to OpenAI GPT-4 with a prompt asking for a structured summary with: TL;DR (2 sentences), key points (5-8 bullets with timestamps), main takeaway, (5) display the summary in a panel that slides in from the right side of the YouTube player, (6) cache summaries in chrome.storage keyed by video ID for instant repeat access, (7) include an options page for OpenAI API key entry. Permissions: storage, activeTab. Host permissions: https://www.youtube.com/*, https://api.openai.com/*. Manifest V3.
Pricing comparison
Eightify
Free tier + ~$5/month for unlimited
PlugThis
$89 one-time + your OpenAI key (~$2-10/month for typical use)
Vs Eightify's ~$5/month plan, PlugThis breaks even in 18 months. After that, you save $60/year forever.
Other alternatives to explore
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Glasp alternative — build your own web highlighter Chrome extension with PlugThis. Private highlights, AI summaries, $89 lifetime.
Liner alternative
Liner alternative — build your own AI-powered web highlighter and search assistant with PlugThis. $89 lifetime, your own AI keys.
Remio alternative
Remio alternative — build your own AI research and knowledge management Chrome extension with PlugThis. $89 lifetime, full ownership.
Notion Web Clipper alternative
Notion Web Clipper alternative — build your own clipping extension with AI summary, auto-tagging, and full content. PlugThis, $89 lifetime.
Build your own Eightify alternative now.
Paste the prompt above into PlugThis and ship your custom version in minutes.
Disclosure: PlugThis is a competing product to Eightify. This comparison is intended for users actively evaluating both options. We last verified the Eightify information on this page on 2026-05-14. Pricing and features may have changed since — please check the Eightify website for current details.
Eightify alternative — FAQ
Is Eightify worth it vs building my own?
Eightify is worth it if you want polished, immediate value with no setup. Build your own if you want full control, your own API key, or to summarize content from sources Eightify doesn't support.
How does PlugThis fetch YouTube transcripts?
YouTube provides transcripts as a built-in feature. The extension scrapes them from the transcript panel that YouTube exposes, or uses publicly available transcript endpoints. No third-party API needed.
Can my YouTube summarizer also work on TikTok or Instagram videos?
Not directly — those platforms don't expose transcripts the way YouTube does. You'd need to add audio-to-text transcription, which is doable but more complex. Start with YouTube, add other sources iteratively.
What if YouTube changes their transcript format?
Either: (a) update the extension by going back to PlugThis and describing the change, or (b) since you have the source code, fix it yourself or hire a developer for a small task.