Undermind vs Perplexity
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.
Change tools
Deep literature search that reports its own coverage
From a question to sources you can open.
- Free access
- Undermind: Free access
- Perplexity: Free access
- Paid from
- Undermind: USD 75 per month
- Perplexity: USD 17 per month
- Plans listed
- Undermind: 6
- Perplexity: 7
- Public API
- Undermind: Not confirmed
- Perplexity: Yes
Where Undermind and Perplexity differ
- PlansUndermind lists 6 plans and Perplexity lists 7.
Head to head
Each value from the tool’s profile and the vendor’s own pages
| Undermind | Fact | Perplexity |
|---|---|---|
| Access and price | ||
| Free access availableFree · USD 0 | Free accessSame | Free access availableFree |
| USD 75 per monthPro (Industry) · or $60 per month billed annually | Lowest listed paid plan | USD 17 per monthPro · billed annually · USD 20 billed monthly |
| Free plan; Pro from $16 a month billed annually | Pricing model | Free + paid |
| 6 | Plans listedDiffers | 7 |
| Not confirmed | Public API | Yes |
| Not confirmed | Card to start | Not confirmed |
| Not confirmed | Open source | No |
| What it is for | ||
| Finding hard-to-locate papers on a specific research question | Built for | Web research with linked sources |
| Research & sources | CategorySame | Research & sources |
| Platforms |
|
| Works with |
|
| How current | ||
| Profile sources checked | ||
| Prices confirmed · Oct 11, 2026 | Pricing checkSame | Prices confirmed · Oct 8, 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
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
Perplexity
Prices confirmed · Oct 8, 2026- FreeFree
- ProUSD 17 per monthbilled annually · USD 20 billed monthly
- MaxUSD 167 per monthbilled annually · USD 2,000 a year; USD 200 billed monthly
- Education ProUSD 10 per month
- Enterprise ProUSD 34 per seat per monthbilled annually · USD 400 per seat a year; USD 40 per seat billed monthly
Show 2 more plans
- Enterprise MaxUSD 271 per seat per monthbilled annually · USD 3,250 per seat a year; USD 325 per seat billed monthly
- Enterprise customContact provider
Strengths and limits
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.
Perplexity
Strengths
- Traceable answers: Every answer links to the web pages it drew on, so each claim can be opened and checked.
- Useful Free plan: Basic search with citations is available without a subscription.
- Built-in research tools: Research mode, Spaces and scheduled Tasks cover reports, shared workspaces and recurring alerts.
Limits to plan around
- Source links still need checking: A link shows where a sentence came from; you still have to open the page and confirm the passage and its date.
- Free research is tight: The pricing page describes Free only as limited usage, and the plan comparison table allows a single Research query a month.
- Pro and Max limits are not published as numbers: Individual plans describe weekly and monthly limits for average or advanced use, so heavy users need to watch their account usage.
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.
How we reviewChange this pair
Choose tools
Choose two tools below. You can replace either selection at any time.
Audio & voice
Automation
Coding
Data & spreadsheets
Images & design
Presentations
Research & sources
Video & editing
Website builders
Writing & content
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.