Compare GPT Reader and Diigo: Which Extension is the Best?

	GPT Reader	Diigo
	Transform any text into natural-sounding speech with this free ChatGPT-powered text-to-speech tool. We've tested its capabilities on short articles and lengthy PDFs. AI ChatGPT	Diigo is a handy tool for bookmarking, highlighting, and annotating web pages. It has many features, but its old design and limited highlight colors might make it less appealing. Highlighter Bookmark Manager
Key Features	Text-to-Speech Conversion: Natural-sounding AI voices powered by ChatGPT Document Support: Handles PDFs, Google Docs, and web content Audio Download: Option to save generated audio for offline listening Playback Controls: Adjustable speed, pause, and rewind functionality Multi-format Support: Works with pasted text, documents, and website content	Highlighting: Works well and highlights are recreated on refresh. Notes: You can add notes to your highlights. Link Creation: Create links to your highlights, although this feature is not very reliable. Sidebar Outliner: Simple design but requires time to understand. Syncing: Highlights are synced across devices.
Our Rating	9.0	7.8
Total users	9,543	200,000
Total ratings	86	2,319
Average rating	4.2 ⭐	4.6 ⭐
Entry Level Price	Free	Free
Chrome	4.5 67 ratings 8.0K+Users	4.6 2.3K+ ratings 200.0K+Users
Edge	-	-
Firefox	3.9 19 ratings 1.5K+Users	-
Safari	-	-
Features	9.2 The functional scope of GPT Reader is designed for a wide range of users and demonstrated many useful functions in the test. The voice quality is surprisingly good and offers a natural-sounding output. We particularly liked the comprehensive format support, which seamlessly processes everything from PDFs to web content. The control of the playback is also well implemented, making it easy to adjust the speed directly and individually. However, the function for downloading audio files stood out the most in the test. In theory, entire books can be converted and then downloaded as audio books. However, this was the only area where we had to make deductions, as the free ChatGPT version had limitations when processing longer texts or documents. We tried to convert a 300-page PDF and were able to process 22% of it, which corresponded to around 2 hours of audio. After this 22%, the free quota of requests on ChatGPT was reached, and the request was canceled.	8.5 Diigo offers basic features for a highlighter and bookmarking tool. It works well and we were able to highlight most websites and they were recreated when revisiting them. The highlighter popup makes it easy to highlight text offering 4 colors. It looks like this: We would have wished to have more color options. Also, note-taking and the tagging functionality are working, but its design does not look appealing. The dashboard where your highlights are stored works well and gives you an overview of all your highlights.
Performance	8.3 The performance tests showed a mixed picture. For shorter texts and paragraphs, GPT Reader processes content quickly and delivers a smooth rendering. The application is fast and reliable for typical use cases such as articles or short documents. Here we tested self-written summaries for learning purposes. However, we encountered significant limitations with larger files, as it is not possible to complete processing due to the limited number of requests. The option of pausing and then resuming would help here. In addition, the process takes a very long time for larger files; the extension needed around 40 minutes for around 75 pages of a PDF. The limitations of the ChatGPT API particularly affect the processing of longer documents such as entire books. This is currently only possible with a premium version of ChatGPT.	8.0 Diigo performs well in terms of highlighting and syncing across devices. The fact that highlights are always synchronized can cause some loading delays. It's not as fast as other highlighters that use an offline-first approach, but it works reasonably well. However, the unreliable link creation feature and the simple sidebar outliner design need improvement.
Design	9.0 The design of GPT Reader is clean and professional, with an intuitive layout that makes navigation effortless. The fact that there is even a dark as well as a light mode shows that the different user preferences have been taken into account. The controls are logically arranged and easily accessible. Even though the extension is designed for functionality, the design is not forgotten.	7.0 The design fulfills its functionality. The design of Diigo is outdated and could use a modern refresh. The lack of a nice overview of all your highlights on the page itself means you have to open the dashboard on diigo.com instead. The dashboard on diigo.com is okay, but other highlighters like Web Highlights have a much nicer user interface.
Value for Money	8.9 Currently, GPT Reader offers a very good price-performance ratio, as all functions are available completely free of charge. We found no hidden costs or unexpected limitations in the free version. The features should be sufficient for most users; the only thing to note is the limited number of requests per hour that ChatGPT allows. If you need to convert entire books into one, you will need a premium version of ChatGPT. It should also be mentioned that the extension already indicates that the download function may be offered in a paid version in the future, which could influence this rating in the future. At the moment, however, it is a very good offer in the text-to-speech sector.	8.0 The free version of Diigo offers basic features and is fine for most users. The paid plans are reasonably priced and similar to other highlighters. However, we think other highlighters offer more value for the same price.
Ease of Use	8.7 In terms of user-friendliness, GPT Reader scores very well. Users of all technical levels should have little problem simply converting text to audio. The user interface is self-explanatory, and all functions are displayed immediately. The only negative point is that a separate ChatGPT registration is still required, and an error message appears if the ChatGPT requests are exceeded, which can lead to confusion.	7.8 Diigo is fairly easy to use, but the sidebar outliner takes some time to get used to. You can't see all your highlights on the page itself, so you have to go to the dashboard on diigo.com. We wish there was a sidebar to quickly access all our highlighted pages, like in the Web Highlights extension.
Security & Privacy	9.7 In our security analysis, GPT Reader showed a strong commitment to protecting user privacy. The extension only collects data from user-reported bugs and feedback. We appreciated the transparent privacy policy, where the user can read specific points.	7.5 Diigo takes reasonable steps to protect user data. However, since you need an account and your data is stored in their database, absolute protection can't be guaranteed. We think a highlighter should work without needing to sign up, but this feature is missing in Diigo.
Conclusion	GPT Reader is a promising text-to-speech extension based on ChatGPT voices. The easy-to-understand voices, combined with the fact that it is completely free, set it apart from conventional TTS tools. The extension can process various document formats. Both PDFs and copied web articles can be converted, but it has its limitations with longer texts. For example, a 300-page PDF was only partially converted in the text due to ChatGPT's limitations, which still resulted in about 2 hours of audio. The tool is very user-friendly and supports multiple languages. This extension is a must for anyone who wants to listen to texts.	Diigo is a handy tool for collecting stuff from the web, like bookmarks, highlights, and notes. It’s a good deal with its premium plans, but the old-fashioned design and limited highlight colors might be a turn-off. If you want something that looks nicer and offers more customization, check out alternatives like Web Highlights.
	Install GPT Reader	Install Diigo
Our Recommendation	In our comparison between GPT Reader and Diigo, GPT Reader came out on top, scoring 9. Diigo is the most widely used, with over 200k users and 2k+ reviews, but GPT Reader outperformed it in our review. User reviews for GPT Reader reflect our findings, while we rate Diigo lower than users do. Notably, Diigo has the highest user rating in the Chrome Web Store at 4.60, which is even higher than our rating of 7.8. 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? GPT Reader stands out with a rating of 9.2. On the other hand, Diigo lags behind in this area with a rating of 8.5. Need top performance? GPT Reader stands out with a rating of 8.3. On the other hand, Diigo lags behind in this area with a rating of 8. Design lovers, take note: GPT Reader stands out with a rating of 9. On the other hand, Diigo lags behind in this area with a rating of 7. Want to get the most for your money? GPT Reader stands out with a rating of 8.9. On the other hand, Diigo lags behind in this area with a rating of 8. If you hate complicated tools, GPT Reader stands out with a rating of 8.7. On the other hand, Diigo lags behind in this area with a rating of 7.8. With privacy and security becoming ever more important, GPT Reader stands out with a rating of 9.7. On the other hand, Diigo lags behind in this area with a rating of 7.5. If you want a quick recommendation, GPT Reader is our top pick. But as always, the best choice depends on what matters most to you.