When comparing OneTab vs Boomerang, the Slant community recommends OneTab for most people. In the question“What are the best Chrome extensions for productivity?” OneTab is ranked 1st while Boomerang is ranked 5th. The most important reason people chose OneTab is:
It takes all of your tabs (choose between all/all-except-current/current/all-to-right/all-to-left) and turns them into links in a special OneTab tab where you can further manage your tabs by dividing them into groups, removing duplicates and securing them so that they can't be removed unless unsecured.
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Pros
Pro Overall very useful
It takes all of your tabs (choose between all/all-except-current/current/all-to-right/all-to-left) and turns them into links in a special OneTab tab where you can further manage your tabs by dividing them into groups, removing duplicates and securing them so that they can't be removed unless unsecured.
Pro You can organize links by dragging and dropping them
You can drag and drop links/tabs to reorder them by relevance, or to move them from one list to another.
Pro Non-invasive
The OneTab dashboard only appears the first time you open your browser after quitting, although you can also make it appear through the extension button in the extensions bar. This is less invasive behavior than the Chrome extensions that appear every time you open a new browser tab.
Pro Provides just enough information
OneTab provides just the right amount of meta-info about the tabs you've saved. It groups them by session, and tells you how many tabs are in each session, as well as the date the session was created. Every saved tab includes the bookmarked favicon and page title.
Pro Management & sharing of saved sessions
OneTab makes it very easy to restore, delete, share, lock, rename, and favorite your saved tab sessions. OneTab also makes it easy to share, export and import URLs into your OneTab dashboard as a whole.
Pro Support for time zones
It's easy to send emails in a different time zone using the standard time zone abbreviations such as: PST, EST, PDT, EDT etc.
Pro Has iOS app
There is a full-blown iOS app for managing or creating emails.
Cons
Con Can get messy
The OneTab tab has everything in a list format with just simple headings describing what you have in this or that list. It isn't comfortable to manage it when you have quite a lot of tabs in there.
Con Slightly confusing UX
It's easy to forget that clicking on the OneTab button in the extensions bar doesn't show you options – it saves your current session by closing all your tabs in the given browser window. That might be slightly annoying if you were trying to access the OneTab dashboard or view OneTab options instead of trying to save your current session in OneTab, but this is only a minor inconvenience given how easy it is to restore your session.
Con Clicking on a tab/link to re-open it automatically deletes it from a session
This is not so much a con as much as it is a heads up for those who use OneTab as a form of transient digital bookmarking (like me!). When you click on a tab/link in any given OneTab session, that will cause it to disappear from the list of tabs in that section. It would be nice if there was an interim period or separate place where the link is still visible/accessible. That or it would be nice to have a version history of past closed tabs/links and sessions.
Con Data loss
When you run ccleaner or CleanMyMac, all OneTab data may vanish.
Con License is per Gmail account
If you want to use Boomerang with multiple Gmail accounts, you will need to pay and manage subscriptions for each Gmail account.
Con Difficult to edit emails once you've scheduled it to send later
Half the time you can't edit an email once you've scheduled. It's a very buggy function. The more reliable way to do this is to cancel the scheduling, go back to the drafts/inbox etc. Edit it as a normal draft then reschedule it. It's quite the hassle. For a paid product it shouldn't be this hard.
Con Webapp doesn't let you schedule a draft you've already made
The web app can't schedule pre-existing emails you have made in drafts. You can only schedule entirely new email content making it really awkward to have to copy and paste in a mobile app.