Semantic Scholar vs Undermind
Plans, free access, limits and intended use side by side, taken from each vendor’s own pages. No score and no winner: the facts show where the two differ.
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Free academic search engine from Ai2 with AI summaries, citation signals, Research Feeds and an open API
Deep literature search that reports its own coverage
- Free access
- Semantic Scholar: Free access
- Undermind: Free access
- Paid from
- Semantic Scholar: No fixed price listed
- Undermind: USD 75 per month
- Plans listed
- Semantic Scholar: 3
- Undermind: 6
- Public API
- Semantic Scholar: Yes
- Undermind: Not confirmed
Where Semantic Scholar and Undermind differ
- PlansSemantic Scholar lists 3 plans and Undermind lists 6.
Head to head
Each value from the tool’s profile and the vendor’s own pages
| Semantic Scholar | Fact | Undermind |
|---|---|---|
| Access and price | ||
| Free access availableWithout an account · USD 0 | Free accessSame | Free access availableFree · USD 0 |
| No fixed price listed | Lowest listed paid plan | USD 75 per monthPro (Industry) · or $60 per month billed annually |
| Free; no paid plan; API keys free | Pricing model | Free plan; Pro from $16 a month billed annually |
| 3 | Plans listedDiffers | 6 |
| Yes | Public API | Not confirmed |
| Not required | Card to start | Not confirmed |
| Not confirmed | Open source | Not confirmed |
| What it is for | ||
| Searching and monitoring scientific literature for free, by hand or through an API | Built for | Finding hard-to-locate papers on a specific research question |
| Research & sources | CategorySame | Research & sources |
| Platforms |
|
| Works with |
|
| How current | ||
| Profile sources checked | ||
| Prices confirmed · Oct 24, 2026 | Pricing checkSame | Prices confirmed · Oct 11, 2026 |
Official source check for both tools. No hands-on testing and no score: “Differs” marks a documented difference, not a better tool.
Plans and prices
Semantic Scholar
Prices confirmed · Oct 24, 2026- Without an accountUSD 0
- Free accountUSD 0
- API keyUSD 0
Undermind
Prices confirmed · Oct 11, 2026- FreeUSD 0
- Pro (Academic)USD 20 per monthor $16 per month billed annually
- Pro (Industry)USD 75 per monthor $60 per month billed annually
- Team (Academic)USD 18.70 per person per monthor $15 per person per month billed annually
- Team (Industry)USD 75 per person per monthor $60 per person per month billed annually
Show 1 more plan
- EnterpriseCustom
Strengths and limits
Semantic Scholar
Strengths
- Free without an account: Search, paper pages and citation data open without signing in.
- Published API limits: The API page states the shared rate for calls without a key and the starting rate for a key.
- Institutional full text: Signing in through OpenAthens, eduGAIN or InCommon links to subscribed PDFs through GetFTR and LibKey.
Limits to plan around
- TLDRs in two fields only: One-sentence AI summaries cover computer science and biomedical papers.
- Simple query language: Search has no Boolean operators or wildcards and does not expand abbreviations; quoted phrases work.
- Thin book and patent coverage: Book coverage is very limited and patents are excluded, so counts differ from other indexes.
Undermind
Strengths
- Free plan with agent access: The pricing section lists agent connections and shared workspaces at $0, with abstracts and metadata searched.
- Coverage is reported: The provider says the report summary states when a search has probably not found everything, so you can extend it.
- Full-text search on Pro: The FAQ says Pro adds search of the full texts of nearly all open-access and preprint papers.
Limits to plan around
- Unnumbered limits: Free has standard rate limits and Pro 10x higher limits, but no page gives the base numbers.
- Single source database: Search draws on Semantic Scholar; the FAQ says a specific paper may not be in it.
- No refunds: The refund policy calls charges non-refundable once a billing period has begun, except where required by law.
See both products
Start from your task, not from a winner.
Run both tools on the same real task, then compare the result, how much editing it needs and how fast it uses your plan’s allowance.
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Comparing tools from different categories is fine, and often useful — a writing assistant and a research tool solve different halves of the same job. The table will show you exactly where they diverge.
Questions about comparing tools
How does the comparison work?
Add two tools to the comparison tray from any tool card, then open this page. The table pulls each tool's verified plan details, platforms, strengths and limits from its profile, so both columns carry the same kind of evidence, with a separate source-check date for each tool.
Do you declare a winner?
No. The table sets two tools against each other on documented facts, not on a score. Which one wins depends on your task, your budget and your usage volume — three things we cannot see from here.
Why are some cells empty or marked unverified?
Because we could not confirm that detail on the vendor's own pages. Rather than filling the gap with a figure from elsewhere, we mark it and say why on the tool's profile.
Can I compare more than two tools?
Not at once. Two columns keep the differences readable and force a real decision. Remove either selected tool to replace it, or clear both to start a new pair.
Every figure in the table above comes from the linked profile, where the source and the verification date are listed. Browse all tools or read the editorial policy.