Readwise Alternative
A Readwise alternative for thinking across books
Readwise syncs, reviews and lets you chat with your highlights. Syntopica is built around a question asked across several of your books: an answer that cites your highlights, and a brief of where those books agree and where they disagree.
The short answer
Syntopica is an alternative to Readwise for readers who want to think across a set of books. Readwise has had chat over your whole highlight library since January 2025, and since August 2026 its Reader app gives cited answers across the documents you have saved there. Syntopica imports your Amazon library and Kindle highlights, groups books into collections, and answers a question across a collection. Answers cite your highlights, which you can tap to read, and label broader knowledge separately. For a collection, Syntopica can also generate a syntopical brief and download it as Markdown.
The difference is easier to see than to describe. This is the synthesis layer — one question answered across four books at once, instead of four separate highlight lists to review.
Decision Making & Cognitive Bias
4 books · 4 passages
What do my books say about why smart people make bad decisions?
Three of these books trace it to the same gap: feeling sure and being right come from different places. Kahneman finds that confidence is set by how coherent the story is, not by the quality or amount of information behind itThinking, Fast and Slow, and Silver sees the same pattern in failed predictions: we focus on the signals that tell the story we would like to be trueThe Signal and the Noise. Tetlock’s best forecasters guard against it by treating beliefs as hypotheses to be tested, not treasures to be guardedSuperforecasting. Ariely adds the twist that these mistakes aren’t random — they’re About this book predictable, which means they can be designed around.
Illustrative example — in the app, answers cite your own highlights
Two more questions across the same four-book shelf, and every citation shows the passage behind it.
What Syntopica does differently
Readwise is built around the highlight: capture it, sync it, review it, and since 2025 chat with it. Syntopica doesn’t try to replace that. It is built around a structured answer to one question — what do these books, taken together, say, and where do they disagree?
- Collections group your books by theme — manually, or from patterns in your highlights.
- Cross-book chat answers a question across an entire collection at once, citing where your books agree and disagree.
- Syntopical briefs export a structured synthesis — themes, disagreements, open questions, and your own stance — as shareable Markdown.
- Reading guides & analysis give you an inspectional map before you read and an analytical summary built from your highlights after.
What they share
Both import your Kindle highlights, both keep your library in one place, and both let you ask questions of what you have read. If your goal is a daily review of individual highlights, Readwise has Daily Review and Syntopica does not. Syntopica is designed for reading a subject the way Mortimer Adler called syntopical — many books in conversation.
Who each one is for
Reach for Readwise when you want a daily review of your highlights and chat across them, or Readwise Reader for cited answers across the documents you have saved there. Reach for Syntopica when you want to sit down with a question and a shelf of books, get an answer that cites your highlights, and generate a brief of where those books agree and where they disagree.
Frequently asked
- How is Syntopica different from Readwise?
- Readwise syncs your highlights, resurfaces them in Daily Review, and since January 2025 lets you chat with your whole library of highlights. Since August 2026 its Reader app also gives cited answers across the documents you have saved there. Syntopica is built around a different output: you group books into a collection and ask a question across all of them. The answer cites your highlights, and you can tap a citation to read the passage. For the collection as a whole, Syntopica can also generate a structured syntopical brief of shared themes and disagreements, which you can download as Markdown.
- Does Syntopica import Kindle highlights like Readwise?
- Yes. A Chrome extension imports your Amazon library and your Kindle highlights and notes (text, note, color, location, and chapter). Your books are then automatically enriched with covers, author bios, series order, and awards.
- Can I use Syntopica and Readwise together?
- Yes. You can use both: keep Readwise for daily review of your highlights, and use Syntopica when you want to work through a topic across several books — build a collection, ask questions across it, and generate a brief.
- Does Syntopica do spaced-repetition review?
- No. Readwise has Daily Review; Syntopica does not. Syntopica’s Remember This Book feature reconstructs a book you have read from your highlights as a conversation, which is a different thing from a daily review of individual highlights.
- Is Syntopica free?
- Syntopica is free during beta with no credit card required. A paid plan will follow at launch, and beta readers keep everything they have imported.
Import your library and start synthesizing
Import your Amazon library and Kindle highlights free. Get reading guides for every book and synthesize across everything you’ve read.
Free during beta, no credit card required.