# Reading & learning, powered by AI

Hear documents read aloud with controls that match how you study.

Ask Celeste about the page in front of you, or thread ideas across your shelf.

Keep PDFs, ebooks, and notes in one place, tuned to how you learn.

* Paid plans include premium AI narrators and the Celeste tutor powered by leading models.

# Celeste supports curious readers and classrooms, including teachers

Trellis helped me reclaim my power. Almost like an ”anti-autopilot”, it’s encouraged me to cultivate deeper relationships with my books by reading through a lens of curiosity and conversation, even without a ”living person” to directly talk to. Trellis has helped me reclaim autonomy and power over my thoughts, decisions, and studies.

Francine Carlos, Human Biology at De La Salle University

I love the way that Trellis aligns with our goals for student-led learning. I work with English teachers who encourage students to “have a conversation with the book” which is literally what Trellis allows them to do. My school’s leaders are adding their professional reading to their library so that they can summarize or search through their own book collections. And Trellis aligns perfectly to our views on Universal Design for Learning. It allows students to interact with text in a variety of ways with multiple modalities. It’s the perfect solution for learners with different needs to access text at their own levels. Trellis is one of the first AI tools for schools which I think is worth paying money for.

Warren Apel, Director of Technology at The American School in Japan

One-on-one attention is incredibly impactful to students, but we have only minutes per student. Celeste, the AI tutor, is fast, reliable, and infinitely available, and she says the things that I would say.

Calum Richards, Former Precalculus Teacher at Givewell

I discovered Trellis way back and was manually inputting my course material into ChatGPT in order to create question banks/solutions for my classes. Trellis’ textbook companion and future exam generator product is going to be a game changer for all students!

Gustavs Zilgalvis, International Policy at Stanford University

Trellis helped me reclaim my power. Almost like an ”anti-autopilot”, it’s encouraged me to cultivate deeper relationships with my books by reading through a lens of curiosity and conversation, even without a ”living person” to directly talk to. Trellis has helped me reclaim autonomy and power over my thoughts, decisions, and studies.

Francine Carlos, Human Biology at De La Salle University

I love the way that Trellis aligns with our goals for student-led learning. I work with English teachers who encourage students to “have a conversation with the book” which is literally what Trellis allows them to do. My school’s leaders are adding their professional reading to their library so that they can summarize or search through their own book collections. And Trellis aligns perfectly to our views on Universal Design for Learning. It allows students to interact with text in a variety of ways with multiple modalities. It’s the perfect solution for learners with different needs to access text at their own levels. Trellis is one of the first AI tools for schools which I think is worth paying money for.

Warren Apel, Director of Technology at The American School in Japan

One-on-one attention is incredibly impactful to students, but we have only minutes per student. Celeste, the AI tutor, is fast, reliable, and infinitely available, and she says the things that I would say.

Calum Richards, Former Precalculus Teacher at Givewell

I discovered Trellis way back and was manually inputting my course material into ChatGPT in order to create question banks/solutions for my classes. Trellis’ textbook companion and future exam generator product is going to be a game changer for all students!

Gustavs Zilgalvis, International Policy at Stanford University

Trellis helped me reclaim my power. Almost like an ”anti-autopilot”, it’s encouraged me to cultivate deeper relationships with my books by reading through a lens of curiosity and conversation, even without a ”living person” to directly talk to. Trellis has helped me reclaim autonomy and power over my thoughts, decisions, and studies.

Francine Carlos, Human Biology at De La Salle University

01

An AI companion who reads what you’re reading

Celeste stays tied to the text in front of you, whether that is one file, a saved set, or your whole library. Ask for summaries, definitions, and links between chapters without losing the thread. Share parts of those chats with friends when you want to compare notes.

02

Natural-sounding audio for any document

Strip footnotes, tables of contents, and margin notes when you want a clean listen, or keep them when you are studying the full text. The Trellis mobile app remains in an invite-only beta while the team tunes performance and playback.

03

All your reading, in one place

Upload from your computer or pull from Google Drive, Dropbox, and other folders you already rely on.

Open PDFs, EPUBs, and plain text on the web, and pick up the same titles on phone or tablet when you sign in.

Immerse yourself in what you’re reading

Step away from the desk and keep the thread: voice-first chats with Celeste, highlights, and quick questions while you walk or commute. Your marks sync back to the same file when you return to the screen.

Share the joy of learning with your friends

Share reading logs and notes with people you trust so you can read in parallel and compare takeaways. Treat books as shared reference points for group projects, book clubs, and study circles.

## Straight answers

Which files can I upload?

Trellis works with PDFs, EPUBs, and common text formats. You can upload from your device or connect cloud storage you already use.

How is Celeste different from a general chatbot?

Replies draw on the book or document you have open, so explanations stay tied to the page instead of generic answers.

What sits behind the paywall?

Free tiers let you try core reading and Celeste features. Premium adds advanced narrators and tutor depth. Check in-app pricing for current bundles.

Where can I use Trellis?

The web app runs in your browser. The iOS app is on the App Store, and other platforms may roll out as the team finishes testing.