# Explain Selected vs SciSpace

Explain Selected records 0 monthly visits with — month-over-month growth and Free pricing. SciSpace records 4,464,111 monthly visits with +8.6% growth and Freemium pricing.

| Metric | [Explain Selected](https://openaitools.app/tool/explain-selected) | [SciSpace](https://openaitools.app/tool/scispace) |
| :--- | :--- | :--- |
| Website URL | https://chromewebstore.google.com/detail/explain-selected/mgdagfcgfpcglofdkfgaajafcmniddcc | https://scispace.com |
| Categories | AI Answer, AI Reader, AI Assistant, AI Language Learning | AI Chatbot, AI Research Tool, AI PDF Summarizer, AI Copilot |
| Pricing Model | Free | Freemium |
| Monthly Visits | 0 | 4,464,111 |
| MoM Growth Rate | — | +8.6% |
| Primary Market | Global | United States |
| Direct Visits | 0 | 1,315,134 |
| Review Score | 3.8 | 4.6 |
| Saved Count | 1 | 54 |
| Supported Platforms | Browser Extension | Website |

## Explain Selected

Explain Selected is a lightweight Chrome extension that removes the friction from looking up unfamiliar words while you read. Instead of opening a dictionary tab and scanning through a dozen senses to find the one that fits, you highlight the word or phrase in place and a purple circle appears. One click gives you the definition, the pronunciation and a plain-language explanation written for that specific context.

The distinguishing feature is contextual disambiguation. English is full of words whose meanings have almost nothing to do with each other — the extension's own example is "pounds", which can mean a unit of weight, a verb describing hitting something, or the British currency. Rather than presenting all three blindly, Explain Selected passes the surrounding sentence to ChatGPT and asks it to infer which sense is actually in play, then retrieves the corresponding Merriam-Webster entry and audio pronunciation. It also handles text that no dictionary covers well, such as current slang and narrow technical terminology.

It is aimed at people who read a lot of English online and want to keep their flow: language learners building vocabulary, professionals working through technical documents, and anyone who keeps encountering words with multiple meanings. Useful selections can be saved to a personal list for later memorization, or shared. Two practical caveats from the listing: extensions do not run in tabs that were already open when you installed it, so refresh those tabs first, and no extension works on Chrome internal pages such as the Chrome Web Store itself.

**Pricing & Plans:** Free. The extension is offered at no cost in the Chrome Web Store, with no in-app purchases listed.

- **Context-aware definitions:** ChatGPT infers which sense of a word fits the sentence you highlighted, instead of dumping every dictionary entry at once.
- **Merriam-Webster definitions and audio:** Matching dictionary entries and audio pronunciation are pulled in so you can hear as well as read the word.
- **One-click purple circle:** Select text and click the purple circle that appears — no popup windows, no copy-pasting into a separate tab.
- **Personal saved list:** Add words you want to remember to a personal list so you can review them later.
- **Share with others:** Send individual explanations to friends when a word or phrase is worth passing on.

**Strengths:** Resolves ambiguous words by using the surrounding sentence rather than guessing; Combines AI explanations with established Merriam-Webster definitions and audio; Works inline on any web page with a single click and no context switching; Saving and sharing selections make it useful for building vocabulary over time

[Profile (Markdown)](https://openaitools.app/tool/explain-selected.md)

## SciSpace

SciSpace began as a typesetting and paper-formatting service called Typeset and has since grown into a broad AI research platform. Its core promise is that a researcher can move from finding a paper to understanding it to citing and writing about it without leaving one workspace. The platform indexes scholarly content from sources such as Google Scholar, PubMed and arXiv, and layers AI agents on top for reading, extracting data and synthesis.

The signature capability is conversational reading: you upload or open a PDF, then ask questions, highlight confusing sentences for plain-language explanation, or request structured summaries of methods, results and limitations. Around that sit task-specific tools — Literature Review, AI Writer, Paraphraser, Citation Generator, AI Detector, AI Humanizer, Extract Data and a Plagiarism Checker — plus a Chrome extension that adds the same assistant on top of publisher pages and a mobile app for reading on the go.

Access follows a freemium model: exploring and limited usage are free, while paid Premium, Advanced, Max and Enterprise plans raise model quality, credit limits and parallel agent capacity. The company is registered as PubGenius Inc. in Milpitas, California, and markets the product to individual researchers as well as universities and enterprises with SSO and admin controls.

**Pricing & Plans:** Freemium. A free tier with limited usage sits alongside paid Premium (~$12/month billed annually), Advanced (~$70/month) and Max (~$160/month) plans; monthly billing is higher. Enterprise pricing is custom. All plans advertise a 24-hour money-back guarantee, and annual billing carries a discount.

- **Chat with PDF:** Open or upload a paper and ask questions, get plain-language explanations of highlighted passages, and pull out methods, results and limitations conversationally.
- **Literature Review and paper search:** Search a large scholarly index spanning Google Scholar, PubMed and arXiv, then generate structured literature reviews and related-work sections from what you find.
- **Writing, paraphrasing and citations:** An AI Writer for drafts, a paraphraser for academic tone, and a citation generator that formats references in popular styles.
- **Extract Data and AI Detector:** Turn tables and results in a paper into structured data, and check whether a manuscript reads as AI-generated with a built-in detector.
- **Chrome extension and mobile app:** Use the same assistant on top of publisher sites and PDF pages via the browser extension, or read and query papers from the mobile app.

**Strengths:** Combines paper discovery, reading, writing and citation tools in one place instead of five separate subscriptions; Conversational explanations of difficult passages are genuinely useful for non-native English readers and cross-disciplinary work; Covers widely used scholarly sources such as Google Scholar, PubMed and arXiv; Free tier plus a Chrome extension make it easy to evaluate before paying

**Limitations:** Credit-based limits can be confusing, and heavy users report hitting caps on the cheaper plans; Model access varies by tier, so the cheapest paid plan does not get the strongest reasoning models; AI-generated reviews and paraphrases still need careful human checking for accuracy and citation integrity

[Profile (Markdown)](https://openaitools.app/tool/scispace.md)

## Frequently Asked Questions

### How do Explain Selected and SciSpace compare in monthly traffic?

Explain Selected has 0 monthly visits, while SciSpace has 4,464,111. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Explain Selected has a month-over-month growth rate of —; SciSpace has +8.6%.

### How does pricing compare?

Explain Selected: Free. Free. The extension is offered at no cost in the Chrome Web Store, with no in-app purchases listed. SciSpace: Freemium. Freemium. A free tier with limited usage sits alongside paid Premium (~$12/month billed annually), Advanced (~$70/month) and Max (~$160/month) plans; monthly billing is higher. Enterprise pricing is custom. All plans advertise a 24-hour money-back guarantee, and annual billing carries a discount.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [ChatGPT](https://openaitools.app/tool/chatgpt-4) | 6,048,022,723 | +2.2% | Freemium | Offers broad general reasoning and document upload capabilities, but lacks specialized academic indexing and citation databases. | [.md](https://openaitools.app/tool/chatgpt-4.md) |
| 2 | [Semantic Scholar](https://openaitools.app/tool/semantic-scholar) | 8,198,672 | +5.8% | Free | Provides a massive free index of scholarly literature with citation graphs, but lacks built-in interactive paper reading assistants. | [.md](https://openaitools.app/tool/semantic-scholar.md) |
| 3 | [Consensus](https://openaitools.app/tool/consensus) | 6,014,388 | -1.2% | Freemium | Provides evidence-based answers extracted directly from peer-reviewed papers, though less of an all-in-one reading workspace. | [.md](https://openaitools.app/tool/consensus.md) |
| 4 | [Language Reactor](https://openaitools.app/tool/language-reactor) | 1,878,769 | +0.6% | Freemium | Learn languages from Netflix, YouTube, and real-world texts with dual subtitles and AI | [.md](https://openaitools.app/tool/language-reactor.md) |
| 5 | [Elicit](https://openaitools.app/tool/elicit) | 1,751,507 | +3.1% | Freemium | Stronger automated data extraction and systematic review synthesis, but less focused on interactive PDF annotation than SciSpace. | [.md](https://openaitools.app/tool/elicit.md) |
| 6 | [Jenni](https://openaitools.app/tool/jenni) | 1,498,133 | +5.2% | Freemium | Focuses heavily on assisted academic drafting and autocomplete, whereas SciSpace centers more on reading and analysis. | [.md](https://openaitools.app/tool/jenni.md) |
| 7 | [Scite](https://openaitools.app/tool/scite) | 841,974 | +1.1% | Free Trial, Contact for Pricing | Excels at tracking citation contexts and how papers cite each other, but has less robust general PDF chat features. | [.md](https://openaitools.app/tool/scite.md) |
| 8 | [Paperguide](https://openaitools.app/tool/paperguide) | 371,972 | -2.9% | Freemium | Streamlines literature searches and reference management like SciSpace, but with a distinct citation workflow. | [.md](https://openaitools.app/tool/paperguide.md) |
| 9 | [CastReader](https://openaitools.app/tool/castreader) | 55,999 | +9.8% | Freemium | Read aloud webpages, PDFs, Kindle books and AI answers with synced highlighting | [.md](https://openaitools.app/tool/castreader.md) |
| 10 | [ResearchPal](https://openaitools.app/tool/researchpal) | 55,231 | -5.2% | Freemium | Searches academic sources and generates literature reviews, but lacks some of SciSpace's advanced collaborative workspace features. | [.md](https://openaitools.app/tool/researchpal.md) |

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Source: https://openaitools.app/compare/explain-selected-vs-scispace

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