Best AI Gmail Extensions for 2023

The realm of Artificial Intelligence (AI) is an ever-expanding frontier, with every industry and sector leveraging its power to streamline tasks and improve overall efficiency.

In the context of email management, notably, Gmail, AI-powered extensions have become indispensable tools. AI Gmail extensions use machine learning algorithms and advanced data analytics to enhance various aspects of the email experience, from managing spam and organizing the inbox to drafting replies and scheduling emails.

These tools have revolutionized the way we interact with our emails, making them an essential feature for any Gmail user in 2023.

Why, you may ask, are these AI Gmail extensions necessary in 2023? For starters, the average professional spends approximately 28% of the workday reading and answering emails, according to a report by McKinsey. An AI Gmail extension can help reduce this time significantly by automating mundane tasks, such as sorting emails and suggesting responses.

Moreover, as cyber threats become more sophisticated, AI extensions can help safeguard sensitive data by detecting suspicious activity.

List of the Best AI Gmail Extensions

  • Mailbutler

  • Gmelius 

  • Boomerang     

  • Sanebox

Mailbutler's Smart Assistant

Mailbutler's Smart Assistant is an AI-powered Gmail extension that offers a suite of features aimed at enhancing productivity and streamlining email management.

Mailbutler’s Smart Assistant is packed with cutting-edge features such as:

Smart Compose: Using just a handful of keywords, the Smart Assistant can draft complete emails. This feature comes in handy for quickly creating meeting invitations, disseminating project progress reports, or penning appreciation notes.

Smart Reply: The AI-generated responses offered by Smart Respond let you save time on straightforward replies. For instance, with just a few clicks, you can accept or reject meeting invites and then customize the message as per your liking.

Smart Improve: With AI-proposed corrections for spelling, grammar, and tone, you can refine your drafts to perfection. This feature ensures a professional level of communication in every exchange, be it client pitches or internal notices.

Task Finder: This feature identifies tasks within emails automatically and compiles them into your Mailbutler Tasks list. Use it to make to-do lists from project status updates, client demands, or team assignments.

Contact Finder: This feature optimizes contact management by using AI to swiftly add email addresses and full names to your Mailbutler Contacts list. It's particularly useful for networking occasions or introducing new team members.

User experience with Mailbutler's Smart Assistant has been generally positive, with users lauding its seamless integration with Gmail and its user-friendly interface. Many have found the Smart Compose and Smart Respond to be a life safer for them.


Gmelius, another notable AI Gmail extension, transforms Gmail into a powerful collaboration platform. Its features include shared inboxes, project boards, and automation rules. Users have praised Gmelius for its functionality, particularly for team projects, and its ability to streamline workflows without leaving the Gmail interface.

As shared by Michelle Wells, Director of Marketing at Boiler Cover UK, “The compatibility of Gmelius with other popular tools such as Trello, Slack, and Zoom, among others, also enhances its functionality. By syncing data across these platforms, Gmelius allows teams to work together more effectively.”

In terms of security, Gmelius commits to a high level of data protection, including encryption and compliance with GDPR. It's also important to note that Gmelius operates on a freemium model, offering a basic set of features for free, with additional features and capabilities available in its paid plans.

It offers a multitude of useful features such as:

  • Shared Inbox: Convert any email into a Gmelius shared inbox and let your teammates manage this shared email from their own Gmail inbox.

  • Helpdesk: Gmelius turns Gmail into a helpdesk and lets your whole company de-silo customer interactions.

  • Collaboration: Gmelius lets you discuss emails with the right stakeholders inside Gmail and offers 2-way integrations with your other tools.

  • Synchronization: Gmelius automatically synchronizes email conversations, email drafts, Gmail labels, and inboxes with the right teammates so you don’t have to FWD or BCC/CC an email ever again.

Boomerang for Gmail

Boomerang, on the other hand, is a productivity tool with AI elements.

Gretel Bubnik, Director of Partnerships at, “Its core features include email scheduling, reminders, and an AI-powered assistant that helps craft better emails. I most importantly appreciate Boomerang's simplicity and effectiveness, specifically, it's "pause inbox" feature that aids in managing email overload.”

Here are some key features of Boomerang:

Email Scheduling: Boomerang allows users to draft an email and schedule it to be sent at a later time. This is especially useful when dealing with recipients in different time zones or when trying to send reminders to yourself or others.

Inbox Pause: This feature enables users to temporarily stop incoming emails, helping to reduce distractions and improve productivity. Users can set up an auto-responder to let people know they won't be checking email for a while.

Boomerang Reminders: This function allows users to "boomerang" emails back to their inbox if there's no reply within a set timeframe. This helps keep track of important conversations and follow-ups.

Read Receipts: Boomerang provides read receipts, giving users confirmation when their emails have been opened.

Respondable: An AI-powered feature that evaluates your emails on various parameters like subject length, question count, politeness, and more, providing real-time suggestions to improve the email's effectiveness.

It's important to note that Boomerang operates on a freemium model. Basic features are free, while access to more advanced features comes at a cost. This extension is well-regarded for its user-friendly interface and effectiveness in streamlining email management and improving productivity.