What did summarize.tech do?
It took a YouTube URL and returned a timestamped outline of the video. It was one of the earliest tools of its kind, it was free for light use, and people used it for lectures, congressional hearings and long podcasts. It read the transcript of one video. It did not read comments, and it had no concept of a channel.
That last point matters when picking a replacement, because most "best summarize.tech alternative" lists recommend tools with the same ceiling.
Why did summarize.tech go offline?
Nobody has said publicly. What the error tells us is that this was not a crash. DEPLOYMENT_PAUSED is what Vercel returns when a deployment is deliberately paused rather than failing, which usually points at a billing decision or an owner stepping away. A service that fell over under load returns a different error, and usually comes back on its own.
That distinction matters for you. A crashed service is worth waiting a day for. A paused one is worth replacing.
What happens to summaries you saved there?
They are unreachable while the deployment is paused, and there is no export path out of a site that will not serve a page. If you kept links to summarize.tech summaries in your notes, treat them as dead links. The underlying videos are still on YouTube, so the recoverable path is to re-summarize the original URLs somewhere else. It is a decent argument, in general, for storing the source link next to any summary you keep.
Which alternative should you pick?
Start by deciding whether you need one video summarized, or a whole channel searched. They are different products, and most lists conflate them.
Everything in the table below was checked against the vendor's own live pricing page in July 2026. Where a vendor blocks automated checks, the row says so rather than guessing. Capability columns reflect using the product, not reading its marketing.
| Tool |
Scope |
Reads comments |
Price |
Best for |
| Taffy |
Whole channel |
Every comment |
$9 · $199 |
Searching a back catalog |
| NoteGPT |
One video |
No |
Free; Pro $9.99 |
Study notes, flashcards |
| Glasp |
One video |
No |
Free; Pro $15 |
Highlighting, curation |
| Gemini |
One video |
No |
Free; Pro $19.99 |
A quick free summary |
| NotebookLM |
One video per source |
No |
Free; bundled tiers |
Mixing videos with documents |
| summarize.tech |
Offline. HTTP 503, DEPLOYMENT_PAUSED, checked 9 July 2026. |
Pricing verified against each vendor's live pricing page in July 2026, except where a vendor blocks automated checks.
What is the closest like-for-like replacement?
Use NoteGPT or Glasp. Both take a YouTube URL and return a timestamped summary, both have free tiers, and both are actively maintained. Gemini will do the same thing free if you already pay for it. None of them are meaningfully better than summarize.tech was; they are simply online.
NoteGPT, if you want the closest thing
Paste a URL, get a timestamped summary. It goes further than summarize.tech did, generating notes, mind maps and flashcards, and it will drop per-video summaries as a channel uploads. It does not read comments, and its per-video summaries never accumulate into a searchable back catalog. Free tier; Pro at $9.99 a month.
Glasp, if you want to keep what you watched
A highlighting layer over the web and YouTube, with a one-click summarizer and a public community of other people's highlights. Better than summarize.tech ever was if capture and recall are the point. Same ceiling: one video, transcript only. Free tier; Pro at $15 a month.
Gemini, if you already pay Google
Drop a YouTube URL into Gemini and it will summarize the video and cite timestamps inside it. That is a real capability and it costs nothing extra if you already subscribe. It keeps no index across videos, so tomorrow it has forgotten. Free; Pro at $19.99 a month.
NotebookLM, if your sources are mixed
If the video is one source among PDFs, articles and your own notes, NotebookLM is genuinely the best tool on this page, and nothing here replaces it for that. It takes one captioned video per source, caps sources per notebook, and never reads comments. Our NotebookLM alternatives for YouTube page has the full breakdown.
What if you need to search a whole channel?
Most people who summarize videos are not trying to summarize a video. They are trying to find something a creator said, without watching four hours to find it. A summarizer cannot help with that, because you have to already know which video to summarize. That is the circular part: the summary is only useful once you have solved the harder half of the problem.
Searching a channel is a different mechanism. Every transcript and every comment is pulled and indexed first, so a question can be matched on meaning rather than on keywords. A viewer asking "where do I start" and one asking "assume I know nothing" are making the same request; only an indexed search treats them as the same thing. Add the comments to that index and you can also ask what the audience said back, which no summarizer has ever been able to answer.
Taffy indexes every transcript and every comment on a channel, then answers a question across all of them with the exact episode and timestamp. Ask what a creator has said about a topic across 300 uploads and you get the segments back, not a reading list. It is the only tool in the table that reads the comments as well as the transcripts.
Readers use the Library to search channels that are already indexed. Channel owners use Creator Club to index their own channel and three competitors.
Where can you compare these tools in more detail?