Reading & learning, powered by AI

Listen to any file intuitively

Talk to Celeste about what you’re reading.

Experience your library, bespoke.

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* paid access for premium AI narrators & AI tutor with GPT-4

Celeste helps everyone learn everything, including teachers

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

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An AI companion who reads what you’re reading

Get instant, useful answers as you read with Celeste, your AI reading & learning companion about a single file, a collection, or your entire library. Share your conversations with Celeste with your friends.

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State-of-the-art audio versions of any file

Customizable removal of footnotes, table of contents, & marginalia for an immersive listening experience. Mobile app in invite-only beta.


All your reading, in one place

Upload any document from your computer, Google Drive, Dropbox or any other source.

Read PDFs, ePUBs, and other text files naturally on web, mobile, & tablet.

Immersive yourself in what you’re reading

You don’t need to be glued to your screen - experience voice-first & hands-free conversations with Celeste. Highlight, annotate & ask questions on the go.

Share the joy of learning with your friends

Share your reading log & notes with your friends so that you can read and learn together. Experience books as relational tools for thinking in community.