vs
Mindgrasp vs Signal Extractor: free, and no card
Mindgrasp turns lectures, PDFs and videos into notes, flashcards and quizzes. The trials run three days and ask for a card.
The short answer
Mindgrasp is built for coursework and it's good at that job: feed it a lecture recording, a PDF, a slide deck or a YouTube link and it produces notes, flashcards and quizzes, with an AI maths helper and live recording on the higher tiers. If you're revising for exams, that's a genuinely useful shape. What it isn't is free. Plans run from about $5.99 to $14.99 a month billed annually, the trials are three days and want a card up front, and the free tier is limited enough that most people hit it inside a session. For the specific job of reading a video, that's a subscription for something you can have for nothing. Signal Extractor is free with no account and no card — paste a YouTube link and read a one-line verdict plus five to eight timestamped takeaways in about ten seconds, every timestamp clicking straight into the video to check a claim. Any video length, and videos with no captions still work because it falls back to the audio. Then ask follow-up questions with the transcript in context, push it to Notion, share it, or follow a channel and get every new upload summarized in your inbox.
Feature by feature
20
Signal Extractor wins
3
Tied
8
Mindgrasp wins
| Price & access | Signal Extractor | Mindgrasp |
|---|---|---|
| Price to summarize | Free | From $5.99/mo |
| Free tier | Unlimited | Limited |
| Card needed to try | No | Yes |
| Trial length | n/a | 3 days |
| No account needed | Yes | No |
| No subscription | Yes | No |
| Video length limit | Any length | Tiered |
| The summary | Signal Extractor | Mindgrasp |
| Timestamped key takeaways | Yes | Limited |
| Timestamps jump into the video | Yes | No |
| One-line verdict up top | Yes | No |
| Same structure every time | Yes | Limited |
| Ready in about ten seconds | Yes | Limited |
| Videos with no captions | Yes | Yes |
| Built for skimming before watching | Yes | No |
| Built for revising afterwards | No | Yes |
| After the summary | Signal Extractor | Mindgrasp |
| Follow-up chat on the video | Yes | Yes |
| Chat can search the web | Yes | No |
| Channel follow + email digest | Yes | No |
| X (Twitter) posts too | Yes | No |
| Save to Notion | Yes | No |
| Public share link | Yes | No |
| Copy as markdown | Yes | Yes |
| Public summary library | Yes | No |
| Flashcards | No | Yes |
| Quizzes | No | Yes |
| Beyond YouTube | Signal Extractor | Mindgrasp |
| PDFs, Word docs and slides | No | Yes |
| Uploaded audio and video files | No | Yes |
| Live lecture recording | No | Yes |
| AI maths help | No | Yes |
| iOS app | No | Yes |
| Focused on one job | Yes | No |
Mindgrasp 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 to know what's in a video without paying, signing up or handing over a card, with timestamps you can click to check anything.
Use Mindgrasp if
You're studying and want the whole coursework stack — flashcards, quizzes, PDFs, slides, lecture recordings and a maths helper — in one subscription.
Mindgrasp questions
Is Mindgrasp free?
There's a limited free tier, but the product is a subscription: roughly $5.99 to $14.99 a month billed annually depending on tier, with three-day trials that ask for a card. Signal Extractor is free with no card and no account.
What is the best free Mindgrasp alternative?
For summarizing YouTube videos, Signal Extractor — free, no sign-up, no cap, with a one-line verdict, timestamped takeaways and a follow-up chat. For flashcards and quizzes off your own PDFs and lecture recordings, Mindgrasp is doing something we don't.
Does Mindgrasp have usage limits?
Their FAQ says plans come with unlimited uploads and no daily limits — but that describes the paid plans. The free tier is limited, and the trials expire after three days. There's no cap here at all and nothing to expire.
Which is better for a lecture I need to revise?
Mindgrasp, honestly. Flashcards, quizzes and spaced study material off a recorded lecture is exactly its purpose. Signal Extractor tells you what's in a video fast and lets you verify it — it isn't a revision system.
Which is better for deciding whether to watch something?
Signal Extractor. A one-line verdict plus timestamped takeaways in ten seconds answers "is this worth forty minutes" without an account, a card or a study workspace.
Can either handle a video with no captions?
Both can — Mindgrasp transcribes uploads and links, and Signal Extractor falls back to processing the audio when a video has no caption track.
What does Mindgrasp do better?
It takes far more than YouTube: PDFs, Word documents, slide decks, uploaded audio and video, and live lecture recording. It generates flashcards and quizzes, has an AI maths expert on higher tiers, and ships an iOS app. For students, that's a real advantage.
Do I have to give a card to try Signal Extractor?
No. There's no card, no trial and no account — paste a YouTube link and the summary starts streaming. There's nothing to cancel because there's nothing to sign up to.
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