What is the best email tool for executive assistants?

For most EAs it is Gmail delegation, which is included with Google Workspace and allows up to 10 delegates per account. Add a tool where delegation stops: Front for an inbox several people share, Superhuman for an executive on Microsoft 365, Shortwave for deep archive search, Slashy for context on people and threads from a phone.

Can an executive assistant send email on behalf of an executive?

Yes. Gmail delegation lets a delegate read, send and delete mail from the executive's account, and sent messages record that the delegate sent them on the owner's behalf. You cannot delegate an alias or alternate address, only a real Google Account, and delegates cannot be added from the Gmail app.

Do EAs need a shared inbox tool or an email client?

It depends on how many people cover the address. One EA supporting one or two executives is usually better served by delegation plus a good client, because shared inbox platforms charge per seat for assignment and collaboration features nobody is using. Once two or more people answer the same address, a shared inbox such as Front starts paying for itself.

How do executive assistants handle email on mobile?

This is the weak spot of plain delegation: delegates cannot be added from the Gmail app, and access to a delegated inbox on Android and iOS is still rolling out, per Google's own help page. EAs who cover executives between meetings usually either keep a laptop nearby or use a tool that answers context questions over a messaging surface instead.

BlogFor Startups

The Best Email Tools for Executive Assistants in 2026

What actually works for EAs managing an executive inbox: Gmail delegation limits, plus Front, Superhuman, Shortwave and Slashy. Prices checked September 2026.

Harsha Gaddipati

Sep 30, 2026 · 9 min read

TL;DR

Start with Gmail delegation, which is free on Google Workspace and covers most of the job, then add a tool only where delegation actually breaks. Front is the pick for a shared inbox a team works out of, Superhuman for an executive on Microsoft 365, and Slashy when the EA needs context on people and threads rather than another place to file mail. Prices checked September 30, 2026.

The Best Email Tools for Executive Assistants in 2026

Most "best tools for EAs" lists skip the part that matters, which is that the baseline is already on your desk and free. Before you evaluate anything, it is worth knowing exactly where Gmail's own delegation stops, because that boundary is what you are actually shopping for.

What does Gmail delegation already do, and where does it stop?

Delegation lets an executive grant you access to read, send and delete mail from their account, with sent messages showing that you sent them on their behalf. On Google Workspace it costs nothing extra. Google documents the limits (Gmail Help, read September 30, 2026):

An account can add up to 10 delegates.
A delegate cannot chat as the executive or change their password.
The invitation expires after a week, and it can take up to 24 hours before access works.
You cannot delegate an alias or an alternate address, only a real Google Account.
Delegates cannot be added from the Gmail app, and mobile access to a delegated inbox is still rolling out.

Those last two are where most EA workflows actually hurt. If you cover an executive from your phone between meetings, delegation has historically meant a laptop. And if the executive's public address is an alias, delegation does not apply to it at all.

The other gap is knowledge. Delegation gives you the mailbox. It does not give you the thing that makes an EA good, which is knowing who this person is, what was promised last quarter, and whether this thread is the one that matters today.

What should an EA actually look for in an email tool?

Five things, roughly in order of how often they break:

Real delegated or shared access, including on mobile, without password sharing.
Send-on-behalf that is visible to the recipient, so nobody is confused about who wrote what.
Calendar in the same place as mail, because most EA email is scheduling.
Context on the person, so you can answer without interrupting the executive.
A way to tell what is urgent in an inbox that is not yours and whose senders you do not know.

A tool that only merges inboxes solves the first two and leaves the rest.

Keep every important conversation moving

Slashy prepares replies, remembers open loops, and keeps customer, investor, candidate, and team conversations on track.

Which tools fit, and what do they cost?

Tool	Best for	Price, checked September 30, 2026
Gmail delegation	The default, and enough for many EAs	Included with Google Workspace
Front	A shared inbox a whole team works out of	Starter $25, Professional $65, Enterprise $105 per seat per month, billed annually
Superhuman	An executive on Gmail or Microsoft 365 who wants speed	Starter $30 per member per month, or $25 billed annually; Business $40, or $33 annually
Shortwave	Digging through years of an executive's archive	Free plan; Pro $18; Business $30, Premier $45, Max $120 per seat per month
Slashy	Context on people and threads, from a phone	$30 per user per month, or $25 billed annually

Front

Front is a shared inbox platform rather than an email client, and it is the right answer when several people work one address. Assignments, internal comments on a thread, and a clear record of who replied are the core of it, which is exactly what breaks when two people cover the same inbox in Gmail. It is also the most expensive option here once you pass Starter's 10-seat cap, and it is aimed at support and operations teams rather than a single EA supporting one or two executives.

Superhuman

Superhuman is the pick if the executive is on Microsoft 365, since Shortwave and Slashy are Google-first. It is built around speed, and its AI documents Auto Labels, follow-up reminders that draft the email for you, Ask AI across inbox and calendar, and Auto Summarize on every conversation (Superhuman, read September 30, 2026). For an EA clearing a few hundred messages a day on someone else's behalf, the one-line summary above each thread does real work.

Shortwave

Shortwave earns its place on search. Its paid ladder is graded by how far back the AI can read, from 90 days on the free plan to unlimited on Premier and Max. If your job involves reconstructing what was agreed with a vendor two years ago, that is worth more than any triage feature. It is Gmail and Google Workspace only.

Slashy

Slashy is the one built around the knowledge problem rather than the filing problem. It keeps a memory of who the executive talks to, how they write to each person, and what earlier threads decided, and it answers questions from that memory over iMessage or Slack, so an EA can get context without opening a laptop or interrupting anyone.

"It's like having an EA who's always one step ahead. I'm walking to a meeting, text 'what do we know about this person,' and the full context shows up immediately."

Daniel Paredes, Sierra Ventures

That quote is from an executive rather than an assistant, which is the point: the same context lookup is what an EA needs, and it works from a phone. Slashy auto-labels into Important, Calendar, Billing, Newsletter, Order, Work and Other, puts the calendar in a sidebar next to the inbox, and tracks opens so you can tell whether a quiet thread was ignored or never seen. It is built on Gmail and Google Workspace, with Outlook.com and Microsoft 365 support in a limited web beta. Professional is $30 per user per month, or $25 billed annually, with a 7-day trial that requires a card.

What to choose if...

You support one executive on Google Workspace: start with delegation, and add a client only when mobile or context becomes the blocker.
Several people cover one address: Front, for assignment and internal comments.
The executive is on Microsoft 365: Superhuman.
You constantly dig through old threads: Shortwave, Premier or Max.
You get asked "who is this person" on the way into meetings: Slashy.
Budget is the constraint: Gmail delegation, then Shortwave's free plan for search.

Frequently asked questions

Have more questions? Visit our Help Center.

This roundup covers selected workflows and is not a complete feature list for any product. Competitor prices and capabilities were checked against each vendor's own pricing and product pages on September 30, 2026, and those pages are linked above. Front is a trademark of Front App, Inc. Superhuman is a trademark of Superhuman Platform Inc. Shortwave is a trademark of Shortwave Labs, Inc. Gmail, Google Workspace and Microsoft 365 are trademarks of their respective owners. Slashy is not affiliated with or endorsed by any of them. If you find an error, email founders@slashy.com and we will correct it.

Last updated: September 30, 2026

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