Most writing is organized around how ideas were written, not how they are best understood.
Paragraphs follow the author’s discovery order.
Key assumptions appear late.
Important transitions go unmarked.
As a reader, your effort shifts:
from judging ideas → to staying oriented.
eisonAI is designed to fix that structural problem.
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What eisonAI does
eisonAI helps you see structure while you read, without rewriting the original text or replacing your judgment.
It works directly on real-world content — long articles, essays, research notes — and makes the moments where meaning actually forms structurally visible.
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Cognitive Index™
Structure, not summary
Instead of summarizing or rewriting, eisonAI highlights the parts of a text where:
- decisions are made
- assumptions are introduced
- arguments turn
You can scan ideas at a glance, then choose where to slow down and think.
Designed for long-form reading
- Handle long documents (up to 15,000 tokens)
- No need to pre-segment or manually clean content
- Stable performance on real, messy texts
eisonAI is built for actual reading, not demo examples.
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Works where you already read
- Safari Extension: see structure directly on the page
- No copy-paste workflows
- No context switching
Reading happens where it always has — eisonAI works alongside it.
Library & organization
- Save what matters
- Tag and revisit ideas
- Build a personal reading library that reflects how you think, not just what you saved
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CloudKit sync
- Keep your library in sync across devices via iCloud
- Seamless continuity between iPhone, iPad, and Mac
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Open source, auditable
Trust code, not promises.
Core components are open source and inspectable.
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No subscriptions
One-time lifetime access.
Restore anytime.
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Who eisonAI is for
- Readers who think while they read
- Writers who care about argument structure
- Researchers working with long texts
- Anyone tired of “AI summaries” that think for them
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Who it’s not for
- If you want instant summaries without thinking
- If you want AI to replace your judgment
eisonAI does not decide for you.
It reveals structure so you can.
What's new (v2.9)
## 2.9
- Fixed Safari Extension not being fully restored from v2.8
- Safari Extension now automatically falls back to BYOK model when encountering errors with Auto Apple Intelligence