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Aster Lab vs Glasp

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors.

The short answer

Free plan
Both — Aster Lab is free to use, Glasp has a free plan
Public API
Glasp has one; not confirmed by us for Aster Lab
Higher Trust score
Glasp — 76 vs 63 for Aster Lab
Best fit
Aster Lab: Students turning a single lecture video into a quiz for review · Glasp: Students and researchers collecting cited passages across the web and PDFs
Platforms
Aster Lab: Web · Glasp: Web, Chrome extension, iOS, Android

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

Aster LabTurns a YouTube video or PDF into a summary, quiz, and flashcardsGlaspHighlighter for web pages, PDFs, YouTube and Kindle that collects your passages in one library and lets you chat with them.

Side by side

FactAster LabGlasp
CategoryStudy Tools & FlashcardsNote-taking & Second Brain
Pricing modelFreeFreemium
Starts at—$12.50/mo
Public APINot confirmedYes
Trust score63 / 10076 / 100
PlatformsWebWeb, Chrome extension, iOS, Android, API
Company—Glasp Inc.
Launched—2021
Last verifiedOct 15, 2026Oct 29, 2026

What our research says

Aster Lab

Aster Lab is handy for converting a long YouTube lecture into something you can actually study from, but the lack of any visible pricing, company name, or team page is worth pausing on for a tool that expects people to upload PDFs and link personal video sources. Treat it as an unverified free tool rather than a service to trust with sensitive documents.

Pros

  • Generates summary, quiz, and flashcards from one input
  • Accepts both YouTube links and PDF uploads
  • No account or payment required to try it

Cons

  • No company name or location published; the about page gives only one individual's contact details
  • No stated pricing beyond an optional Patreon support tier
  • No API or platform beyond the web app

Glasp

Glasp fits students, researchers and writers who read a lot online and want every quote kept with its source and searchable later. People who want their reading private by default, or who mostly need a full note editor rather than a highlighter, should look elsewhere.

Pros

  • Free plan keeps unlimited highlighting plus exports and Notion sync
  • Works across Chrome, Safari, Edge, Brave, Firefox, Opera and mobile
  • Each highlight keeps its source metadata, so quotes stay cited
  • MCP connector and API make the library usable from other AI tools

Cons

  • Highlights are public by default; privacy is a paid feature
  • Free AI allowances are small, especially video summaries
  • Social feed is of limited use to people who read alone

Which one fits

Choose Aster Lab if you need

  • Students turning a single lecture video into a quiz for review
  • Casual use converting a PDF into flashcards

Choose Glasp if you need

  • Students and researchers collecting cited passages across the web and PDFs
  • Writers keeping a swipe file of quotes for drafting with ChatGPT or Claude
  • Readers who want Kindle and web highlights in one library

Aster Lab vs Glasp: the questions people ask

Is Aster Lab cheaper than Glasp?

Aster Lab is free to use; Glasp starts at $12.50/mo.

Does Aster Lab or Glasp have a free tier?

Both: Aster Lab is free to use, and Glasp has a free tier.

Which has a public API, Aster Lab or Glasp?

Glasp ships a public API, as of our last verification. A public API for Aster Lab is not confirmed by us — check its developer docs before you plan an integration.

More comparisons

All Aster Lab alternatives →Browse all Study Tools & Flashcards →