Compare Instapaper and Grammarly: Which Extension is the Best?

Instapaper lets you save, organize, and highlight articles, videos, and web pages for offline reading. Features include folders, Kindle sync, text-to-speech, and mobile apps
Grammarly is a comprehensive writing assistant offering real-time grammar, spelling, punctuation, and style suggestions. With over 44 million users, it’s a trusted tool for enhancing your writing.
Key Features
  • Offline Reading: Save web pages to read later without internet connection
  • Text View: Clean, distraction-free reading experience
  • Highlighting: Mark important passages in your saved articles
  • Kindle Integration: Send articles directly to your Kindle device
  • Browser Extension: Quick save functionality across major browsers
  • Mobile Apps: Access your reading list on iOS and Android devices
  • Folder Organization: Create custom folders to organize your saved content
  • Grammar Checker: Detects and corrects grammatical errors.
  • Spelling Checker: Identifies and fixes spelling mistakes.
  • Punctuation Checker: Ensures proper punctuation usage.
  • Tone Detector: Analyzes the tone of your writing.
  • Auto-Citations: Generates citations for online sources.
  • Generative AI: Produces instant drafts, ideas, and replies.
Our Rating
8.2
8.8
Total users
214,048
54,568,609
Total ratings
657
47,132
Average rating
4.1 ⭐
4.2 ⭐
Entry Level PriceFreeFree
Chrome
Chrome Web Store logo
3.8
2.67
542 ratings
200.0K+Users
Chrome Web Store logo
4.5
3.70
42.8K+ ratings
39.0M+Users
Edge
-
Microsoft Edge Store logo
3.9
3.69
1.1K+ ratings
14.9M+Users
Firefox
Mozilla Firefox Add-ons Store logo
4.4
4.39
115 ratings
14.0K+Users
Mozilla Firefox Add-ons Store logo
4.1
4.15
3.2K+ ratings
663.7K+Users
Safari
-
-
Features
8.8

Instapaper's feature set is impressive in its core functionality. The service excels at its primary purpose of saving and reading web content offline. The text view feature provides an excellent reading experience, stripping away distractions and presenting content in a clean, readable format. The highlighting and note-taking capabilities are useful tools for active readers, though they could benefit from some refinement. The Kindle integration works seamlessly, making it easy to transfer articles to your e-reader. Mobile apps offer reliable synchronization across devices, ensuring your reading list is always up to date. However, the service lacks some modern features like social sharing that competitors offer. The search functionality in the free tier is somewhat basic, and customization options are more limited compared to other services in this space.

screenshot
9.5

Grammarly goes beyond basic grammar and spelling checks. It offers advanced features like tone detection, vocabulary enhancement, and generative AI capabilities. Compared to competitors, Grammarly provides a more comprehensive set of tools, making it a valuable asset for any writer.

Performance
8.0

Instapaper’s performance is strong overall, but the initial setup leaves much to be desired. After installing the Chrome extension, there was no response or prompt—no indication that any further action was needed. It wasn’t until we read a user review that we realized we had to manually visit the Instapaper website and log in. Without that information, we likely would have assumed the extension was broken and uninstalled it.

Once past that rocky start, however, the service works reliably. Web pages save quickly, and saved content loads without issue. Offline access is stable, and synchronization across devices keeps your reading list up to date. The mobile apps offer smooth performance and quick navigation, while the text view provides a responsive and comfortable reading experience. The search function is usable, though slightly slow at times. Despite the poor onboarding, Instapaper delivers solid functionality once everything is properly set up.

9.0

Grammarly performs well across different platforms, providing real-time suggestions without significant lag. The tool is reliable and helps improve writing efficiency.

Design
8.5

The design of Instapaper focuses on simplicity and readability. The interface is clean and minimalist, putting the content front and center. The text view is particularly well-designed, offering a comfortable reading experience with good typography and spacing. The mobile apps follow their respective platform design guidelines, providing a native feel on both iOS and Android. The browser extension maintains this simplicity with a straightforward interface. However, some UI elements feel dated and could use a refresh. While the reading experience is consistent across platforms, the navigation could be more intuitive in some areas. The limited customization options might disappoint users who prefer more control over their reading environment.

8.5

The design is clean and intuitive, making it easy to navigate. The color-coded underlines for suggestions are helpful, and the interface is user-friendly. However, some users might find the pop-ups slightly intrusive.

Value for Money
8.0

The pricing structure of Instapaper offers a basic free tier that's functional but limited. The premium features are reasonably priced, offering good value for heavy readers. The pricing is competitive compared to alternatives in the market. However, some features that are currently premium could potentially be included in the free tier to provide more value to basic users. The annual subscription offers good savings for committed users. While the premium features are well-implemented, the free tier could offer more value to attract new users and provide a better experience for casual users.

8.5

While Grammarly offers a free version, the Premium plan is relatively expensive. However, the advanced features and comprehensive feedback justify the cost for those who need a robust writing assistant.

Grammarly is the priciest option for a reason—because, in our view, it's the best writing tool available in its category. If you're looking for the best writing assistant, go for the Premium plan, you won't regret it!

Ease of Use
7.0

Instapaper’s setup process is not beginner-friendly. After installing the browser extension, there was no response or guidance—no prompt, login window, or confirmation. We had to manually visit the website and log in, something we only discovered thanks to a tip in another user’s review. Without that, we likely would have uninstalled the extension, assuming it didn’t work. However, once logged in, the service functions smoothly. Saving content is quick, the interface is clean and intuitive, and managing your reading list is simple and efficient.

9.0

Grammarly is straightforward to use, with a minimal learning curve. The browser extension integrates seamlessly with various platforms like Google Docs and Gmail, allowing you to get started right away.

Security & Privacy
9.0

Instapaper takes user privacy and security seriously. The service maintains a clear and transparent privacy policy, explicitly stating that user data is not sold to third parties. The company has demonstrated a strong commitment to user privacy through its GDPR compliance and Privacy Shield certification. Data storage is secure, and the service regularly updates its security measures. The data collection practices are transparent, with clear explanations of what information is collected and how it's used. This high level of attention to privacy and security makes Instapaper a trustworthy choice for users concerned about their data.

8.0

Grammarly takes privacy seriously, with stringent security measures in place. While an account is required, the company assures users that their data is not sold or made public. However, some users may still have concerns about data processing.

Conclusion

Instapaper is a reliable “read-it-later” service that is characterized by its core features. The service has maintained its position in the market by focusing on what matters most to readers: a clean, distraction-free reading experience and reliable offline access to stored content.

While it doesn't offer the breadth of features of some newer competitors, its simplicity and reliability make it a solid choice for those who primarily want to save articles and read offline. Recent issues with the Chrome extension and some user complaints about the save feature need to be addressed, but the core service remains stable and useful.

For users who appreciate a simple, straightforward approach to saving and reading web content, Instapaper remains a good choice. However, those looking for advanced features or a more modern interface should look for alternatives.

In our eyes, Grammarly is the best choice for anyone who wants to write professional articles or other things in English.

Even though Grammarly has an expensice price tag, you can't get anything better on the market. We have been using Grammarly for a long time now. And even in the world of ChatGPT and other AI tools, Grammarly is just super handy and helpful. For us, the Premium plan is worth every penny.

This only applies as long as you are in the English-speaking world. If you need other languages, we would recommend LanguageTool instead.

Our Recommendation

In our comparison between Instapaper and Grammarly, Grammarly came out on top, scoring 8.8.

Grammarly is the most widely used, with over 55 million users and 47k+ reviews—and it also delivered the strongest performance in our tests. User reviews reflect our findings.

Notably, Grammarly has the highest user rating in the Chrome Web Store at 4.17, which supports its strong performance in our review.

There are some noticeable differences between these extensions, so it's worth considering your priorities and the details below.


  • Looking for the richest feature set? Grammarly stands out with a rating of 9.5. On the other hand, Instapaper lags behind in this area with a rating of 8.8.
  • Need top performance? Grammarly stands out with a rating of 9. On the other hand, Instapaper lags behind in this area with a rating of 8.
  • Both look and feel great: Instapaper and Grammarly. In the Design category, Instapaper has scored a very good 8.5. The design is appealing and generally effective, with a few minor areas for improvement.
  • Want to get the most for your money? Grammarly stands out with a rating of 8.5. On the other hand, Instapaper lags behind in this area with a rating of 8.
  • If you hate complicated tools, Grammarly stands out with a rating of 9. On the other hand, Instapaper lags behind in this area with a rating of 7.
  • With privacy and security becoming ever more important, Instapaper stands out with a rating of 9. On the other hand, Grammarly lags behind in this area with a rating of 8.

If you want a quick recommendation, Grammarly is our top pick. But as always, the best choice depends on what matters most to you.