Lune

Comparisons

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.

Install the connectorSee pricingotio.ai

Start with the one you should not buy from us

If the first list is you, take Otio.

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

  1. Upload your files
  2. Chat across them
  3. Page-level citation

Lune

  1. Search top-tier venues
  2. Read the full text
  3. Quote with a locator
Otio works from the files you bring. Lune works from the published record, and your files too.

Line by line

Marks the side we think wins. We mark the ones we lose.

  • Where sources come from

    Lune

    Lune wins this row. A curated index of top-tier venues, plus your uploads.

    Otio

    Files you upload, plus deep research over the web.

  • Reading and annotating

    Lune

    Basic. Lune is not a PDF reader.

    Otio

    Otio wins this row. A real reader, page-level citations, parallel chats.

  • Where you use it

    Lune

    Lune wins this row. Any MCP client, plus a CLI and three miniapps.

    Otio

    The Otio web workspace.

  • How deep a citation goes

    Lune

    A verbatim quote and locator from the published paper.

    Otio

    Page-level citations into the document you uploaded.

  • Limits that bite

    Lune

    Lune wins this row. Requests a day. That is the only meter.

    Otio

    Uploads, file size, storage, spaces, parallel chats.

  • Entry price

    Lune

    Lune wins this row. $4.99 a month, or $47.90 a year.

    Otio

    $7 for Lite, $18 for Go, $45 for Pro.

Where the difference comes from

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.

What your agent can call

  • search_papers
  • search_papers_many
  • search_related_papers
  • get_paper_fulltext
  • get_paper_citations
  • extract_from_papers
  • verify_claims
  • gather_evidence
  • list_conferences
  • get_conference_papers
  • search_research_guidance
  • get_research_guidance_doc

One connection, in Claude Code, Cursor, Codex, ChatGPT or anything else that speaks MCP. The same tools back the miniapps in the Lune dashboard.

Price

Lune

Free
$0 10 requests a day, every tool
Pro
$4.99 a month or $47.90 a year, 300 requests a day
Max
$9.99 a month or $95.90 a year, 600 requests a day
Credits
$0.99 300 extra requests, no expiry

Otio

Free
$0 10 uploads a day, 1 space
Lite
$7 a month, 50 uploads a day
Go
$18 a month, 250 uploads a day
Pro
$45 a month, 500 uploads a day

Otio advertises 50% off on annual billing. Prices move; treat this as a snapshot, not a quote.

What we read

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.

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