# Lune vs Scid

Scid searches papers, drafts literature reviews and draws the citation graph in a workspace you can organize. Lune exposes the same graph as a tool call, so the agent walks it instead of you.

Competitor site: https://scid.ai.

## Choose Scid if

- Seeing the citation graph laid out is how you find the thread.
- You want a workspace with a library, tables and drafts in one place.
- Non-expiring credits suit work that comes in bursts.

## Choose Lune if

- You would rather the agent traverse the graph than hand you a picture of it.
- You need the quote behind a claim, with its location.
- You want the same tools in every client you use.

## From a question to a citation

Scid: Search papers -> Draw the citation graph -> Draft the review.
Lune: Search top-tier venues -> Walk the citations -> Quote with a locator.

A graph you read, or a graph the agent walks on your behalf.

## Line by line

| Dimension | Lune | Scid |
| --- | --- | --- |
| Where you use it | Any MCP client, plus a CLI and three miniapps. | The Scid web workspace. |
| Citation relationships | get_paper_citations walks both directions as a tool call. | Interactive citation graphs you explore visually. |
| How deep a citation goes | A verbatim quote and its locator, per claim. | Drafted reviews citing the papers found. |
| Your own files | A Workspace miniapp indexes uploads for your team. | Upload files into the workspace library. |
| How it is priced | A daily request allowance, from free. | Credits that do not expire, with a free tier. |
| Agent access | MCP and a CLI, on every plan. | No MCP server or public API listed on their site. |

## Two things to do with a citation graph

Scid draws it. A laid-out graph is genuinely useful when you are new to an area and looking for the cluster everything points at, and visual exploration finds threads a query never would.

Lune traverses it. get_paper_citations returns what cites a paper and what it cites, so an agent can follow a lineage back to the paper that actually introduced a method, then quote the definition.

## Drafting against grounding

Scid will draft the literature review for you. That saves a first pass, and the citations point at real papers it found.

Lune does not draft. Your agent writes, and verify_claims answers each sentence with the supporting quote or with nothing found. The division of labour is deliberate: the model is good at prose and bad at remembering what a paper said.

## 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
- Scid Free: $0, no monthly credits
- Scid Paid: Credits, purchasable, non-expiring

Scid sells credits rather than a flat monthly allowance.

## Questions

### Is Lune a Scid alternative?

For agent-side retrieval and claim checking, yes. For exploring a citation graph visually in a workspace, Scid is built for that and Lune is not.

### Does Lune draw citation graphs?

No. It exposes citation edges as a tool your agent calls, in both directions.

### Does Scid connect to agents?

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

## What we read

- [scid.ai](https://scid.ai)