Lune

Comparisons

Lune vs GregoryAI

GregoryAI watches a field, indexes what appears through Crossref and ORCID, and flags what matters using machine learning. It is free, open source and yours to run. Lune is hosted, paid, and built around quoting source text.

Install the connectorSee pricinggregory-ai.com

Start with the one you should not buy from us

If the first list is you, take GregoryAI.

Choose GregoryAI if

  • You want to own the pipeline and run it on your own machines.
  • Monitoring a field over time matters more than answering one question.
  • Free and open source under CC BY 4.0 is the deciding factor.

Choose Lune if

  • You want answers now, not a pipeline to configure.
  • You need the exact sentence a claim rests on.
  • You want the tools inside Claude Code or Cursor without hosting anything.

From a question to a citation

GregoryAI

  1. Configure the sources
  2. Index and filter
  3. Alerts and dashboards

Lune

  1. Search top-tier venues
  2. Read the full text
  3. Quote with a locator
One watches a field over time. The other answers a question now.

Line by line

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

  • How you run it

    Lune

    Hosted. Install a connector and go.

    GregoryAI

    GregoryAI wins this row. Open source on GitHub, self-hostable, CC BY 4.0.

  • What it watches

    Lune

    Top-tier venues, indexed as papers are accepted.

    GregoryAI

    Sources you configure, synced with Crossref and ORCID.

  • How deep a citation goes

    Lune

    Lune wins this row. A verbatim quote and its locator, per claim.

    GregoryAI

    Key takeaways extracted from what it indexed.

  • Programmatic access

    Lune

    An MCP server and a CLI.

    GregoryAI

    Public and private APIs.

  • Price

    Lune

    Free for 10 requests a day, then $4.99 a month or $47.90 a year.

    GregoryAI

    GregoryAI wins this row. Free, plus whatever your hosting costs.

  • Methodology guidance

    Lune

    Lune wins this row. A corpus on peer review, ablations and venue choice.

    GregoryAI

    Not offered.

Where the difference comes from

Owning the pipeline

GregoryAI is open source under a permissive licence, with a public API and a dashboard, and it was built for a real problem: keeping a clinical field's literature under continuous watch. If you want to own that pipeline, nothing on our pricing page competes with running it yourself.

The cost is the usual one. Somebody configures the sources, keeps it running and tunes the relevance model. That somebody is you.

Monitoring and answering are different verbs

A monitor's job is coverage over time: tell me when something relevant appears. It is measured on what it did not miss.

An evidence tool's job is a single question, answered now, with the source text attached. Lune is measured on whether the quote it returned supports the sentence. Both are useful. Neither substitutes for the other.

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

GregoryAI

Open source
$0 CC BY 4.0, self-hosted

GregoryAI is free software; your only cost is hosting it. Prices move; treat this as a snapshot, not a quote.

What we read

Questions

Is Lune a GregoryAI alternative?
Not really. GregoryAI monitors a field and can be self-hosted; Lune answers questions with quoted source text and is hosted.
Is Lune open source?
The MCP server and CLI are published on npm; the corpus and API are not open source.
Can they run together?
Yes. GregoryAI watches your field, Lune checks what you write about what it surfaced.

Trustworthy AI for Scientific Research

Free to start. Every tool from the first request.

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