Compare
The tools on this page overlap. Several of them can save an article, explain a passage or answer a question. The useful test is what happens when you bring in something you actually want to understand.
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Disclosure: this comparison is written by Omphalis about its own product, so it is not a neutral review. We are not paid by the tools named here or by anyone else to be compared favourably, this page carries no affiliate links, and every claim about the tools named here is checked against their own public documentation. Read the full disclosures, and tell us if something here has gone out of date.
Checked against official documentation on September 11, 2026, and the Snipd, LiquidText, MarginNote, Elicit, Mindgrasp, and Eightify entries on September 29, 2026. Our suggestions about fit are our judgment.
Updated
Open an article, use its sections to find your place, and open an explanation when a passage needs more context. You can ask a follow-up question and keep a note attached to the passage.
| Tool | What it is built for | Try Omphalis when |
|---|---|---|
| Readwise Reader | Saved reading, highlights and listening, with Ghostreader to explain a passage and answer questions across your library with citations. | You want to work through one difficult passage with an explanation beside it. |
| NotebookLM | Studying a set of sources: questions with citations, study guides, mind maps and Audio Overviews. Now called Gemini Notebook. | You want to read one source, open an explanation and keep your own notes beside it. |
| Heptabase | Cards and whiteboards, with PDF reading, highlights and questions about your sources. | You want to work through a source, open explanations and keep related sources in a notebook. |
| A read-later list for articles. Mozilla shut Pocket down on July 8, 2025. | You still have reading from that list and want to finish one article. | |
| Omnivore | The hosted cloud app was deprecated in November 2024. The project remains on GitHub for people who want to self-host. | You used the hosted app and still have an article, PDF or talk to finish. |
| Instapaper | Saving articles as clean text that syncs across devices and reads offline. Premium adds full-text search, a permanent archive and a PDF reader. | You want help finishing a difficult piece rather than storing it more quietly. |
| Matter | An Apple-first read-later queue with strong text-to-speech, newsletters and highlighting. | You need to finish dense PDFs and hard passages on the source. |
| Glasp | Social highlighting for web pages, PDFs, YouTube and Kindle, public by default, with private highlights on a paid plan. | You want private marks, and to finish and understand articles, PDFs, podcasts and talks. |
| Snipd | A podcast player for iOS and Android: triple-tap your headphones to save a moment with its audio, transcript and a written summary. | You want to read an episode as a transcript with explanations and notes, in the same Library as your articles and PDFs. |
| LiquidText | A PDF and document workspace for iPad, Mac and Windows, where excerpts you drag onto a workspace link back to the source. | You want to finish a dense PDF with explanations beside hard passages and notes that reopen the passage. |
| MarginNote | Turning each highlight into a card that is also a mind-map node and a flashcard on a spaced-repetition schedule, on iPhone, iPad and Mac. | You want to get through a dense source and come back to your marks on the passage. |
| Elicit | Finding and screening academic papers: search by meaning, and systematic reviews with sentence-level citations. | You want to read the papers you keep, with explanations beside hard passages and answers cited to your library. |
| Mindgrasp | Generating notes, summaries, flashcards and quizzes from lectures, PDFs, slides, audio, video and YouTube links. | You want to work through the lecture or paper itself, with explanations beside hard passages and notes that reopen them. |
| Eightify | A written summary of a YouTube video with key insights and timestamped navigation, for deciding quickly whether it is worth watching. | You want to work through a talk you already chose, with a section map, explanations and marks on the transcript. |
| Obsidian / Notion | Writing notes, with web clippers that save pages into an Obsidian vault or a Notion workspace. | You want to read a source, ask about it and gather the passages you want to write from. |
| Raindrop.io | Saving and finding links, with highlights kept alongside your bookmarks. | You also want to work through the text or transcript. |
Readwise Reader combines saved reading, highlights, listening and Ghostreader. Ghostreader can explain a selected passage and answer questions across your library with citations.
Try it if you want reading and questions in the same library. Compare the experience of working through one difficult passage with Omphalis.
Compare with Omphalis →NotebookLM, now called Gemini Notebook, lets you collect sources, ask questions with citations, and create study guides, mind maps and Audio Overviews.
Try it if you want several ways to study a set of sources. Compare that with reading a source in Omphalis, opening an explanation and keeping your own notes beside it.
Compare with Omphalis →Heptabase combines cards and whiteboards with PDF reading, highlights and questions about your sources. Space search can find relevant cards and whiteboards for an answer.
Try it if arranging ideas visually helps you think. Compare that with working through a source in Omphalis, opening explanations and keeping related sources in a notebook.
Compare with Omphalis →Mozilla shut Pocket down on July 8, 2025. Exports were first due to close on October 8, then closed on November 12, 2025 according to Mozilla's help article. Pocket was a read-later list for articles, not a place that helped you finish a dense piece.
If you still have reading from that list, try one article in Omphalis. The Pocket guide is for people who kept an export file.
Compare with Omphalis →Omnivore's hosted cloud app was deprecated in November 2024. The project remains on GitHub for people who want to self-host. Omphalis is hosted software, not an open-source fork and not Wallabag.
Try Omphalis if you used the hosted app and still have an article, PDF or talk to finish. If you need to run the server yourself, that is still Omnivore's GitHub project.
Compare with Omphalis →Instapaper saves articles as clean text, syncs across devices, and reads offline. Premium adds full-text search, a permanent archive, a PDF reader, scheduled Kindle sends and text-to-speech playlists.
Keep it if a calm queue is the whole job. Compare Omphalis when you want help finishing a difficult piece rather than storing it more quietly.
Compare with Omphalis →Matter is a polished Apple-first read-later with strong text-to-speech, newsletters, and fluid highlighting. Matter markets PDF save alongside articles, but dense academic comprehension beside the source is not its center of gravity.
Keep it if iPhone listening and a clean read-later queue are the whole job. Compare Omphalis when you need to finish dense PDFs and hard passages on the source.
Compare with Omphalis →Glasp is a social highlighter for web, PDFs, YouTube, and Kindle. Highlights are public by default so others can learn from your reading; private highlights need a paid plan.
Keep it if community highlighting is the whole job. Compare Omphalis when you want private marks and to finish and understand articles, PDFs, podcasts, and talks.
Compare with Omphalis →Snipd is a podcast player for iOS and Android built around snips: triple-tap your headphones to save a moment with its audio, transcript and a written summary. Snips sync to Readwise, Notion, Obsidian and other note apps, and the free plan covers unlimited listening with generated features on two episodes a week.
Keep it if you capture podcast moments while you listen on the go. Compare Omphalis when you want to read an episode as a transcript with explanations and notes, in the same Library as your articles and PDFs.
Compare with Omphalis →LiquidText is a PDF and document workspace for iPad, Mac, and Windows where you drag excerpts onto a workspace, each linked back to the source with a single click. Pro 2023 and LIVE add ink, links drawn between any two points, and documents viewed in parallel.
Keep it if an excerpt canvas and ink are how you think. Compare Omphalis when you want to finish a dense PDF you saved, with explanations beside hard passages and notes that reopen the passage.
Compare with Omphalis →MarginNote 4 makes each highlight in a PDF, EPUB, web page, or video a card that is also a mind-map node and a flashcard reviewed on an FSRS spaced-repetition schedule. MarginNote runs on iPhone, iPad, and Mac (no Windows client), at $12.99 once for Pro on iPhone and iPad or $16.99 a year for Max on all three.
Keep it if a textbook has to become a mind map and a deck you review. Compare Omphalis when you want to get through a dense source and come back to your marks on the passage.
Compare with Omphalis →Elicit is a research assistant that searches more than 138 million academic papers and 545,000 clinical trials by meaning rather than exact keywords. The Elicit systematic review workflow screens papers, extracts data with supporting quotes, and produces reports with sentence-level citations.
Keep it for finding and screening papers. Compare Omphalis for reading the papers you keep, with explanations beside hard passages and answers cited to your library.
Compare with Omphalis →Mindgrasp is a study tool that takes recorded lectures, PDFs, slides, audio, video, and YouTube links and generates notes, summaries, flashcards, and quizzes, with a tutor you can ask about the material. The Mindgrasp Chrome extension pulls class material from Canvas, Blackboard, or any website.
Keep it if generated study notes and practice quizzes before an exam are the whole job. Compare Omphalis when you want to work through the lecture or paper itself, with explanations beside hard passages and notes that reopen them.
Compare with Omphalis →Eightify is a Chrome extension, with iOS and Android apps, that writes a summary of a YouTube video with key insights, timestamped navigation, and a top comments overview. Eightify also generates transcripts you can download as plain text or SRT, in more than 40 languages.
Keep it if deciding quickly whether a video is worth watching is the whole job. Compare Omphalis when you want to work through a talk you already chose, with a section map, explanations, and marks on the transcript.
Compare with Omphalis →Obsidian and Notion can both bring web content into your notes. Obsidian's Web Clipper saves locally to your vault and includes a reader and highlighter. Notion's clipper saves pages into a workspace or database.
Keep using the place where you like to write. Try Omphalis for reading a source, asking about it and gathering the passages you want to write from.
Raindrop lets you highlight saved web pages and keep those highlights with your bookmarks.
If saving and finding links is the whole job, a bookmark manager may be enough. Try Omphalis when you also want to work through the text or transcript.
Looking for a home for old Pocket saves? Compare Pocket with Omphalis or see the Pocket guide.
Choose a passage you find difficult. Read it, ask the question you have, follow the answer back to the passage it cites, then leave a note. A test like that tells you more than a feature checklist.
Try the reader without an account →Pocket and the hosted Omnivore app have both shut down. Mozilla shut Pocket down on July 8, 2025, and Pocket exports closed on November 12, 2025, according to Mozilla's help article. Omnivore's hosted cloud app was deprecated in November 2024, and the Omnivore project remains on GitHub for people who want to self-host. Omphalis is hosted software, not an open-source fork of Omnivore.
If saving articles is the whole job, a read-later app or a bookmark manager may be enough. Instapaper saves articles as clean text, syncs across devices and reads offline. Matter is an Apple-first read-later app with strong text-to-speech and newsletters. Raindrop.io keeps highlights with your bookmarks. Try Omphalis when you want help finishing a difficult piece rather than storing it more quietly.
NotebookLM, now called Gemini Notebook, lets you ask questions across a set of sources with citations and create study guides, mind maps and Audio Overviews. Mindgrasp generates notes, summaries, flashcards and quizzes from lectures and readings. MarginNote makes each highlight a flashcard reviewed on a spaced-repetition schedule. Omphalis does not make flashcards or quizzes. Omphalis is for working through the lecture or paper itself, with explanations beside hard passages and notes that reopen them.
Snipd is a podcast player built around snips: triple-tap your headphones to save a moment with its audio, transcript and a written summary. Eightify writes a summary of a YouTube video with key insights and timestamped navigation, which helps you decide quickly whether a video is worth watching. Omphalis opens an episode or a talk you already chose as a transcript with a section map, explanations and marks on the transcript, in the same Library as your articles and PDFs.
Elicit is built for finding and screening papers: it searches more than 138 million academic papers by meaning, and its systematic review workflow produces reports with sentence-level citations. LiquidText lets you drag excerpts from a PDF onto a workspace, and MarginNote makes each highlight a card in a mind map. Omphalis is for reading the papers you keep, with explanations beside hard passages and answers cited to your library.
Readwise Reader, NotebookLM, Elicit and Omphalis all answer with citations, in different ways. Readwise Reader's Ghostreader answers questions across your library with citations. NotebookLM answers questions across a notebook's sources with citations. Elicit produces reports with sentence-level citations. In Omphalis, Ask answers with citations that lead back to the passage each point came from, including when you ask out loud in the web app: the answer is spoken and its citations appear on screen.
No. You can keep writing in Obsidian or Notion. Obsidian's Web Clipper saves web pages locally to your vault, with a reader and highlighter, and Notion's clipper saves pages into a workspace or database. Keep using the place where you like to write, and try Omphalis for reading a source, asking about it and gathering the passages you want to write from.