Explainpaper vs Moonlight (2026): which should you pick?
As of Nov 12, 2026, Explainpaper grades higher than Moonlight: 2.4 against 2.2 out of 4.0.
Checked Nov 12, 2026 · graded Nov 12, 2026 by ToolGPA
Explainpaper grades higher on the free plan. They get the same grade on value for money, features, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Explainpaper
Highlight confusing text in a paper and get a plain explanation
Moonlight
AI reader for research papers with explanations and translation
Which one is for you
Pick Explainpaper if
- Fits if you're a student who hits a paragraph in a paper that makes no sense
- Works for readers who keep their papers in Zotero
Look elsewhere if
- Tight if you stay free: basic AI models only
- Pricey if you want figure and equation explanations, outlines or saved highlights, which are Pro at $12 a month
- Skip it if you want to search for papers, as it only helps you read one
- Watch out: the Teams plan has no published price, and there are no apps beyond the browser
Pick Moonlight if
- Fits if you read a few papers a week and want explanations beside the text
- Works for readers who need a paper translated with its layout kept
Look elsewhere if
- Tight if you stay free: AI features on only 3 papers a week
- Pricey if you want Claude or Gemini Pro models, which means Premium at $49 a month
- Watch out: Team plans are priced by seat tier and the billing basis isn't shown
- Watch out: no desktop or mobile app, and no integrations are listed
How we grade them
| 2.4GPAExplainpaperFair | 2.2GPAMoonlightFair | |
|---|---|---|
| Value for money | CPro is $12 a month billed yearly ($16 monthly), which puts it in the dearer quarter of a category whose middle is $10. | CPro is $10 a month billed yearly ($12 monthly), the category's middle. Premium, which adds Claude and Gemini Pro models, is $49. |
| Free plan and trial | BFree forever with unlimited highlight explanations, follow-up questions and Zotero import, on basic models. A student could live on it, but the stronger model is Pro. Pro has a 7-day trial. | CA free plan with unlimited document access and AI on 3 papers a week, on two base models. A reader doing more than 3 a week will hit it. |
| Features | CExplanations, follow-ups, figures, equations, outlines and saved highlights. The listing shows figures, outlines and saved highlights as Pro-only, and it covers just reading a paper. | CExplanations in context, layout-preserving translation, citations, chat and summary and a library. Several features are marked Limited on Free. |
| Ease of use | BNo store rating on record. Upload a paper, highlight what you don't follow, and read the answer. | BNo store rating on record. Upload a paper and read, but features like deep search take some learning. |
| Platforms and integrations | CWeb only, with Zotero library import the single integration. No apps are listed. | CWeb and a Chrome extension. No desktop or mobile app was found, and no integrations are listed. |
| Best for | getting a plain explanation of a confusing paragraph | reading research papers with in-context explanations |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Explainpaper and Moonlight. How we grade
Price against what you get
Explainpaper starts at $12 a month and scores 2.3 out of 4 on features, ease of use and platforms. Moonlight starts at $10 a month and scores 2.3.
They score the same, and Moonlight starts $2 a month lower. Of the other AI research tools on the chart, 13 score higher than Explainpaper for less, and 10 score higher than Moonlight for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- Explainpaper also covers documents.
- Moonlight also covers citations.
At a glance
| Explainpaper | Moonlight | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $12 per month, billed yearly ($16 billed monthly) | $10 per month, billed annually ($12 billed monthly) |
| Free plan | Unlimited highlight explanations and follow-up questions, with basic AI models and Zotero library import. | Unlimited document access, with AI features limited to 3 papers a week. |
| Free trial | 7-day free trial of Pro | None listed |
| Web | ||
| Browser extension | ||
| Made by | Explainpaper | Corca, Inc. |
| Price read from | explainpaper.com | themoonlight.io |
| Checked | Nov 12, 2026 | Nov 12, 2026 |
Worth knowing
Explainpaper
- Free accounts get basic AI models; the stronger model needs Pro.
- Saved highlights and figure explanations are Pro only.
- The Teams plan has no published price.
Moonlight
- The Free plan limits AI features to 3 papers a week, and several features are marked Limited there.
- Which AI models you can use depends on the plan: Premium adds the most expensive ones, including Claude and Gemini Pro models.
- Team plans are priced per user in seat tiers (1-3, 4-15, 16-29), with 30 or more seats handled through a partnership; the Team billing basis is not shown.
- The homepage source links a Chrome Web Store listing; no desktop or mobile app was found on the pages read.
Key features
Explainpaper
- Highlight to explain
- Select text in an uploaded paper and receive a simpler explanation of that passage.
- Follow-up questions
- Ask further questions about a passage; available on the free plan.
- Figures and equations
- On Pro, click a graph, figure or equation to get it explained.
- Paper outlines
- Pro generates an outline with clickable page references.
- Saved highlights
- Pro keeps your highlights and the explanations you received.
- Zotero import
- Bring in your Zotero library on any plan.
Moonlight
- Explain in context
- Select any part of a paper to get an explanation of the passage, a figure, a table or an equation, without copying and pasting.
- Layout-preserving translation
- Translates a paper line by line, aligned with the original, and can translate whole pages.
- Smart citations
- Shows details of a cited reference in a preview so you can check it without leaving your place in the paper.
- Chat and summary
- Ask questions and discuss the paper, and get keywords and a summary of the key points.
- Library and deep search
- Organizes papers in a library and recommends related papers based on what the library holds.
- Markup and auto highlight
- Highlight, annotate and take notes, or let the tool underline key points automatically.
Plans
Explainpaper
Free$0
Unlimited highlight explanations, follow-up questions and Zotero import, on basic AI models.
Pro$12
per month, billed yearly ($16 billed monthly)
Explains graphs, figures and equations; automatic outlines; saved highlights; questions about the paper.
TeamsCustom
Everything in Pro, plus team management, priority support and volume discounts.
Moonlight
Free$0
Unlimited document access with limited AI features on 3 papers a week and two base models.
Pro$10
per month, billed annually ($12 billed monthly)
Unlimited AI-assisted papers, 5 infographic explanations a week and selected advanced models. Marked with a 1-week free trial.
Premium$49
per month, billed annually ($59 billed monthly)
Everything in Pro with access to all models, including Claude and Gemini Pro models, and 30 infographic explanations a week.
EnterpriseCustom
For larger teams and organizations; contact the vendor. Team seat pricing is shown for 1 to 29 seats.
Ways to pay less
Explainpaper
- Annual discount
Save 25% with yearly billing
The pricing page lists Pro at $12 a month billed yearly against $16 a month billed monthly, labeled as a 25% saving.
Moonlight
- Annual discount
17% off with annual billing
The pricing page marks the Year option as saving 17-20%; Pro is $10 a month on annual billing against $12 monthly, and Premium $49 against $59.
Common questions
Which is cheaper, Explainpaper or Moonlight?
As of Nov 12, 2026, Moonlight is cheaper to start with: $10 a month, against $12 a month for Explainpaper. Explainpaper starts at $12 per month, billed yearly ($16 billed monthly), and Moonlight starts at $10 per month, billed annually ($12 billed monthly).
Which has a free plan, Explainpaper or Moonlight?
As of Nov 12, 2026, both Explainpaper and Moonlight have a free plan.
Which platforms do Explainpaper and Moonlight run on?
As of Nov 12, 2026, only Moonlight lists a browser extension. Both list a web app. A platform missing from a listing is one its maker's pages did not mention.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.