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. | Todoist is a well-known to-do app with a simple, easy-to-use design. Its browser extension lets you quickly access your to-do list in a nice popup. | |
Key Features A summary of the most important features offered by each extension. |
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Our Rating Tooltivity's expert review score for each extension, based on hands-on testing and research. | 7.8 | 8.9 Winner in this category |
Total users Total active users across all major browsers: Chrome, Edge, Firefox, and Safari. | 200,000 | 889,191 Winner in this category |
Total ratings Total number of user ratings received across all supported browsers. | 2,319 | 52,311 Winner in this category |
Average rating Average user rating across all browsers, calculated from available store ratings. | 4.6 ⭐ Winner in this category | 4.4 ⭐ |
Entry Level Price The minimum price required to start using the extension. "Free" means a free tier is available. | Free | Free |
Chrome User rating and stats for the extension on Chrome browser. | ![]() 4.6 3.56 Average Chrome Web Store rating from the last 100 reviews 200.0K+Users | ![]() 4.7 4.48 Average Chrome Web Store rating from the last 100 reviews 700.0K+Users Winner in this category |
Edge User rating and stats for the extension on Edge browser. | - | ![]() 4.0 4.0 Average Microsoft Edge Store rating from the last 100 reviews 174.2K+Users Winner in this category |
Firefox User rating and stats for the extension on Firefox browser. | - | ![]() 4.7 4.63 Average Mozilla Firefox Add-ons Store rating from the last 100 reviews 14.9K+Users Winner in this category |
Safari User rating and stats for the extension on Safari browser. | - | - |
Features Tooltivity's expert score for the 'Features' aspect of each extension. | 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. ![]() | 9.3 Todoist offers comprehensive functions for task management. Tasks can be prioritized, labeled and filtered. ![]() Another good feature is that websites can be saved directly as tasks. This can be done via the taskbar button or by right-clicking. In this way, information on a website can be added directly as a task that you want to edit or read up on later. ![]() The extension can also be used to mark tasks directly as completed. Other features like collaborating on projects and tracking progress with personalized productivity trends add further value. Some of these advanced features of the application, such as customized templates and advanced reports, are available in the paid plans. Winner in this category |
Performance Tooltivity's expert score for the 'Performance' aspect of each extension. | 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. Winner in this category | 7.3 Most of Todoist's functions worked quickly and without problems in our tests. ![]() |
Design Tooltivity's expert score for the 'Design' aspect of each extension. | 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. | 9.5 The design is clean and intuitive, making it easy to navigate immediately. The interface can also be visually customized to suit your needs, but these are not overdone. The option of color-coded priority levels and project labels also helps with organization. Winner in this category |
Value for Money Tooltivity's expert score for the 'Value for Money' aspect of each extension. | 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. | 9.0 The functions of the Todoist extension are free of charge. The free functions of the Todoist application should also be sufficient for most users. For users who want to use functions such as reminders or additional view options, the price should also be reasonable. With an annual payment installment, $4 per month is reasonable in our view. Winner in this category |
Ease of Use Tooltivity's expert score for the 'Ease of Use' aspect of each extension. | 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. | 9.0 In our test, we had no problems with the installation and the first steps. The creation of tasks and overall use is self-explanatory. There are also many instructions and tutorials already available for the tool. Winner in this category |
Security & Privacy Tooltivity's expert score for the 'Security & Privacy' aspect of each extension. | 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. | 9.0 Todoist describes its data security in detail in its Privacy Policy. This states that the data is encrypted according to the state of the art and that regular security updates are carried out. The data is stored in the cloud for synchronization; it cannot be stored locally. Winner in this category |
Conclusion A summary of our findings and final thoughts for each extension. | Diigo is a handy tool for collecting stuff from the web, like bookmarks, highlights, and notes.
| Todoist is a great option for task management. We really like its simplicity, which is likely why it has become so popular. While some modern tools may offer more features, Todoist is one of the best choices if you’re looking for a solid, beautifully designed to-do list. Still, we noticed some performance issues. The extension takes longer to load when working in environments with a bad internet connection. It’s not a dealbreaker, but something to be aware of, especially if you often work in places with poor internet. Overall, Todoist is a strong choice for anyone seeking an easy-to-use and powerful task manager, though its speed and offline capabilities could be improved. If you would like to test Todoist yourself, you can use our code to get the Pro version for 2 months free of charge. https://get.todoist.io/mgs7dk |
Our Recommendation | In our comparison between Diigo and Todoist, Todoist came out on top, scoring 8.9. Todoist is the most widely used, with over 889k users and 52k+ reviews—and it also delivered the strongest performance in our tests. User reviews for Todoist 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.
If you want a quick recommendation, Todoist is our top pick. But as always, the best choice depends on what matters most to you. |