# Lune vs Otio

Otio is built around the sources you already have: upload PDFs, chat across them, keep page-level citations, write in the same place. Lune starts earlier, at finding the work, and later, at checking the draft against it.

Competitor site: https://otio.ai.

## Choose Otio if

- Your sources arrive as files and reading them in one place is the problem.
- You want a choice of models in the same workspace and a good PDF reader.
- You keep several projects apart with spaces and parallel chats.

## Choose Lune if

- You need to find the relevant papers, not only work through yours.
- You want claims checked against published text, with quotes you can paste.
- You want that inside the agent you already write in.

## From a question to a citation

Otio: Upload your files -> Chat across them -> Page-level citation.
Lune: Search top-tier venues -> Read the full text -> Quote with a locator.

Otio works from the files you bring. Lune works from the published record, and your files too.

## Line by line

| Dimension | Lune | Otio |
| --- | --- | --- |
| Where sources come from | A curated index of top-tier venues, plus your uploads. | Files you upload, plus deep research over the web. |
| Reading and annotating | Basic. Lune is not a PDF reader. | A real reader, page-level citations, parallel chats. |
| Where you use it | Any MCP client, plus a CLI and three miniapps. | The Otio web workspace. |
| How deep a citation goes | A verbatim quote and locator from the published paper. | Page-level citations into the document you uploaded. |
| Limits that bite | Requests a day. That is the only meter. | Uploads, file size, storage, spaces, parallel chats. |
| Entry price | $4.99 a month, or $47.90 a year. | $7 for Lite, $18 for Go, $45 for Pro. |

## Where the two overlap

Lune has a Workspace miniapp that indexes uploaded documents and answers over them with citations, so the overlap is real. If that is all you need, both do it, and Otio's reader is nicer.

The difference is what sits next to it. In Lune an uploaded document lives beside the full text of accepted papers, and the same agent moves between them in one turn.

## Deep research over the web is not peer review

Otio's deep research works over the web, which is right for a general workspace and wrong for a citation you will defend. Web sources are ranked, not reviewed.

Lune's index holds only papers accepted at top-tier venues. Nothing else gets in, so nothing else comes out. A narrower promise, and one you can hand to a reviewer.

## Pricing

- Lune Free: $0, 10 requests a day, every tool
- Lune Pro: $4.99, a month or $47.90 a year, 300 requests a day
- Lune Max: $9.99, a month or $95.90 a year, 600 requests a day
- Lune Credits: $0.99, 300 extra requests, no expiry
- Otio Free: $0, 10 uploads a day, 1 space
- Otio Lite: $7, a month, 50 uploads a day
- Otio Go: $18, a month, 250 uploads a day
- Otio Pro: $45, a month, 500 uploads a day

Otio advertises 50% off on annual billing.

## Questions

### Is Lune an Otio alternative?

For finding and verifying published work, yes. For reading and annotating PDFs all day, Otio is the better reader.

### Can Lune chat with my own PDFs?

Yes. The Workspace miniapp indexes uploaded documents and answers over them with citations, scoped to your team.

### Does Otio connect to agents?

No MCP server or public API is listed on their site.

## What we read

- [otio.ai](https://otio.ai)
- [Pricing](https://otio.ai/pricing)