Where Omphalis fits

A source-first PKMS for long-form content.

Most tools save what you find. Omphalis helps you understand it. Every article, PDF, newsletter, podcast and video goes through the same comprehension pipeline, so the things you keep stay returnable instead of becoming another pile.

Yes, it is a kind of PKMS. The source-first kind: it starts with the content you are trying to understand, not with folders, databases or a blank note.

Start with one thing you savedSee pricing

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app.omphalis.ai
A research paper in the Omphalis reader with an annotation opened and the structure in the rail
The same comprehension pipeline on every source: structure, marks on the hard parts, and a way back to the exact moment.

The shape of the category

You already have tools. They each stop short of the same thing.

Note-first tools begin after the reading is done. Highlight-first tools capture but rarely return. Answer-first tools hand you a reply beside the source instead of keeping you in it. Save-first tools file the link and forget the reason. Each is strong at its job. They share one gap: saving, noting, or answering is not the same as understanding.

Note-first

Obsidian, Notion

Highlight-first

Readwise Reader

Answer-first

NotebookLM

Omphalis

Before and around the source itself.

Save-first

Raindrop, Instapaper

An honest look

The tools you already use, and where Omphalis comes in.

Each of these is good at what it does. The point is not that Omphalis replaces them on their own ground. It is that the comprehension step between saving and understanding is missing, and that is the step Omphalis is built for.

Readwise Reader

Highlight-first

Great at

Read-it-later across articles, PDFs, email and video, with highlights synced everywhere and a genuinely good reading experience.

Where it leaves you

Highlights pile up faster than you revisit them, and the reader stops at capture. It rarely helps you understand a dense argument or return to the exact moment that mattered.

What Omphalis adds

Structure and marks, not just highlights. Each piece is mapped into typed moments, and a mark carries a note in your own words plus a path back to the source.

NotebookLM

Answer-first

Great at

Asking questions of a set of sources and getting grounded answers, with a strong audio overview of what you uploaded.

Where it leaves you

It hands you answers beside the source rather than keeping you inside it, and it is built around a notebook session, not a library you return to for months.

What Omphalis adds

Help arrives at the point of friction inside the source: define, expand, trace the claim. The source stays the center, what you keep connects over time, and Omphalis can even build a structured course on a topic from openly licensed sources.

Obsidian / Notion

Note-first

Great at

Once something is a note, these are excellent. Linked notes, databases, wikis, and a vault that is fully yours.

Where it leaves you

They begin after the reading is done. The hard part, working through the article, paper or talk and deciding what matters, is still on you, by hand.

What Omphalis adds

It sits before the note. It cleans and structures the source, surfaces the dense moments, and lets you mark what matters first. Only what earns it becomes a note.

Raindrop (and Pocket, now closed)

Save-first

Great at

Fast saving and tidy collections of links you can find again later. Pocket was the best known of these until Mozilla shut it down in 2025.

Where it leaves you

Saving is not understanding. The saved link becomes a bookmark whose reason you have forgotten.

What Omphalis adds

It keeps the reason, the moment and the source context attached, and brings you back by meaning, not just by title.

The difference is the pipeline

Not more formats. The same four steps for every format.

An import pipeline brings the item in and stops. A comprehension pipeline keeps going. Every source you keep moves through clean, structure, mark and connection.

Clean
Import the item as-is, or strip it down to plain text.
Turn every source into the same calm, readable page, with the clutter gone and the words intact.
Structure
A summary, or an outline if you are lucky.
A map of the piece: its typed moments, dense passages and argument flow, all navigable.
Mark
A highlight, saved somewhere.
A mark is a span plus your own note, kept as a first-class object with a path back to where it came from.
Connection
Tags, backlinks and folders you maintain by hand.
Quiet links across what you have kept: the thing you saved last year, beside the one that matters today.

In your words

What people actually say, and the answer.

“I saved it, but I don't remember why.”

Omphalis keeps the reason, the mark and the source context attached.

“I remember the podcast idea, not the timestamp.”

Return by idea, section, timestamp and mark.

“I highlighted a lot. Now what?”

See every mark in one place, jump back to the source, and watch them connect over time.

“I just want the gist.”

Start with the gist, then stay with the structure and the exact moments when it matters.

“My sources are everywhere.”

One source-first model for articles, PDFs, newsletters, podcasts and videos.

“I don't want another note-taking religion.”

Work through the source first. Turn only what matters into notes later.

Begin keeping what matters connected.

A library that you keep, instead of a feed that keeps you.

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