13 Best AI Assistants for Gmail (2026)
Writing a good reply is solved. Every tool here does it.
The two things that decide whether your inbox actually shrinks are whether it starts on its own when mail arrives, and whether it can finish the job outside Gmail. Most of this list fails both.
The quick answer: Carly AI is the best AI assistant for Gmail. New mail starts a workflow rather than waiting for you to open something, it sends from the account you name with approval steps where you want them, and it carries the work into your calendar, CRM, and task list instead of stopping at a draft. It holds Outlook accounts alongside your Gmail ones too. Free Zapier-style workflows; AI agents from $35/month. Connect Gmail here. If you want a faster inbox to live in, Shortwave or Superhuman are better clients.
Quick comparison
| Tool | Sends mail | Starts on new mail | Acts in other apps | Outlook too | Entry price |
|---|---|---|---|---|---|
| Carly AI | Yes | Yes | Yes, 260+ apps | Yes | Free workflows; agents $35/mo |
| Tasklet | Yes | Yes | Thousands, plus HTTP and MCP | Yes | Free; Starter $25/mo |
| Grok | Yes, with scopes | SuperGrok only | Connected tools | Yes | Plan-dependent |
| Lindy | On approval | No general listener | Thousands | Yes | Plus $29.99/mo |
| Shortwave | Yes | AI filters on Business+ | Calendar, MCP | No | Free; Pro $18/mo |
| Superhuman Mail | Yes | Auto Drafts only | Calendar, CRM, MCP | Microsoft 365 | Starter $30/mo |
| Gemini / Spark | Yes | Spark monitors only | Google only | No | Free tier; $9.99/mo |
| ChatGPT | On approval | Scheduled polling | Enabled apps | Yes | Plus $20/mo |
| Inbox Zero | Drafts | Rules by plan | Plus tier | Yes | Trial; $20/mo |
| Gmelius | Yes | Yes | Cross-app workflows | Waitlist | $19/user/mo annual |
| Fyxer | Never sends | Organizes on arrival | HubSpot on Pro | Yes | Starter $30/mo |
| SaneBox | No | Yes, filing | Mailbox only | IMAP | $4.54/mo bi-yearly |
| Spark Mail | Yes | Betas only | Calendar, HubSpot | Yes | Free; Plus $10/mo |
1. Carly AI
Carly AI is built around the message arriving, not around you opening a tab. A meeting request lands, and Google Calendar gets checked, three times get proposed, the reply goes out, the meeting gets booked, HubSpot gets updated, and an Asana task appears. Total user time: zero. It runs in the cloud, so your laptop can be shut.
That is a workflow, and the trigger is the email. Almost everything else on this list is a prompt waiting for you.
It is not blind autonomy, either. Each agent has its own name, email address, instructions, memory, files, integrations, and permissions, and you decide which actions run freely and which stop for review. Searching can be automatic while sending waits for a yes.
And it holds Gmail and Outlook side by side. Each account is authorized separately with a role you name, and every result says which account it came from, so a personal address and two work addresses stay distinct. Most tools here pick a provider; Carly runs both, across as many accounts as you connect.
Best for: Gmail work that should happen before you get to it, and work that continues past the inbox
Key features:
- Fires on new mail rather than on a prompt or a timer
- Sends from the connected account, with per-agent approval steps
- 260+ integrations across 45+ categories, plus your own API keys for anything else
- Holds several Gmail and Outlook accounts at once
- Delegate by email, SMS, Slack, or dashboard chat
Pricing: Free Zapier-style workflows; AI agents from $35/month
Limitations: Carly is not a Gmail client, so keep the interface you like. Each account is authorized individually, and a managed Workspace may need administrator approval. If you want every AI-written message to stay a draft by design, Fyxer or Inbox Zero is a simpler fit.
Why it stands out: It is the difference between an assistant that helps you answer mail and one that has already answered the routine mail. Start here.
2. Tasklet
The closest broad cross-app alternative. Gmail and Outlook, new-email, CRM, webhook, and schedule triggers, plus thousands of apps, HTTP APIs, MCP, a browser, and code execution. Email is one output of a larger workflow rather than the centre of the product.
Best for: developer-shaped cross-app automation
Pricing: Free tier; Starter $25/mo; Pro $100/mo
Limitations: More build-it-yourself than delegate-it. A separate product from Shortwave, despite the related companies.
3. Grok
Connects to Gmail with read, search, draft, send, reply, forward, label, and trash actions once scopes are enabled. Automations run on schedules for everyone, and SuperGrok adds incoming-email triggers filtered by sender, recipient, or subject.
Best for: existing SuperGrok users with narrow, filter-shaped automations
Pricing: plan-dependent; email triggers are SuperGrok-tier
Limitations: The inbox is the only event it watches, so nothing starts because a deal moved or a form arrived.
4. Lindy
Scheduled routines, thousands of integrations, and multiple inboxes on higher plans. Deliberately approval-oriented: anything with outside impact, sending included, waits for review.
Best for: teams that want a human on every outbound action
Pricing: Plus $29.99/mo; Pro $99.99/mo
Limitations: No documented general Gmail arrival listener, and you remain the last step on every reply.
5. Shortwave
Replaces the Gmail interface with genuinely good AI search, summaries, drafting, bundles, calendar actions, and AI filters that automate defined inbox actions.
Best for: Gmail search and AI organization
Pricing: Free with limits; Pro $18/seat/mo; Business $30 adds AI filters, integrations, and MCP; Premier $45; Max $120
Limitations: Gmail and Google Workspace only, with no Outlook. Broader cross-app automation lives in the sister product, Tasklet.
6. Superhuman Mail
Keyboard-first client with split inboxes, AI drafts, scheduling, Auto Drafts, and Auto Labels. Superhuman Go adds user-invoked actions across calendar and connected tools.
Best for: fast triage by someone who wants to be in their inbox
Pricing: Starter $30/mo or $300/yr; Business $40/mo adds Ask AI, custom auto-labels, HubSpot, Salesforce, and Mail MCP
Limitations: Auto Drafts stay drafts. Go actions are foreground and user-invoked.
7. Gemini in Gmail and Spark
Built in and lowest-friction, with summaries, Help me write, and a side panel on eligible accounts. Gemini Spark adds schedules plus Gmail-filter and topic monitors on eligible paid personal accounts, and can search, draft, reply, and manage labels and calendar.
Best for: Google users who want something already installed
Pricing: some free features; Google AI Plus from $9.99/mo, Pro $19.99; included in current Workspace Business editions
Limitations: Availability is fragmented by account type, region, language, plan, and rollout. No Microsoft side at all.
8. ChatGPT
Searches Gmail with structured syntax, drafts, and sends after you approve. ChatGPT Work can check Gmail on a schedule.
Best for: people already paying for ChatGPT
Pricing: Plus $20/mo
Limitations: Scheduled tasks poll on a timer rather than subscribing to a Gmail arrival event, so nothing is genuinely triggered. Your own calendar is read-only.
9. Inbox Zero
Sorts, labels, and drafts replies across Gmail, Google Workspace, and Outlook, with app integrations on the Plus tier.
Best for: cheap sorting plus drafting across both providers
Pricing: seven-day trial; Starter $20/user/mo
Limitations: The hosted product has a trial rather than an ongoing free tier, and rules vary by plan.
10. Gmelius
Gmail-native shared inboxes with AI sorting, scheduling, follow-up, and automation that does fire on incoming mail.
Best for: Gmail teams sharing an inbox
Pricing: Meli $19/user/mo annual; shared-inbox capabilities start on Growth at $25 annual or $33 monthly
Limitations: Outlook is still on a waitlist, and the shared-inbox features people want are a tier above the entry price.
11. Fyxer
Organizes incoming mail and prepares drafts in Gmail or Outlook, and is explicit that it never sends without your permission.
Best for: people who want drafts ready and nothing sent
Pricing: Starter $30/mo or $22.50 annual; Professional $50/mo or $37.50 annual adds multiple inboxes, scheduling, Fyxer Chat, and HubSpot
Limitations: By design, you send every message. Cross-app reach is limited to meetings, scheduling, and HubSpot on the Professional tier.
12. SaneBox
Works at the mail-server level, so its learned priority folders show up in whatever client you use. BlackHole, snooze, and reminders cut repeat inbox work.
Best for: server-side priority sorting with no new app
Pricing: from $4.54/mo on bi-yearly billing; 14-day trial
Limitations: Sorting, not doing. It does not draft or send, and suggested replies are an opt-in beta.
13. Spark Mail
Multi-provider client with Smart Inbox and a limited free AI allowance covering writing, summarizing, search, and calendar events.
Best for: a low-cost client across Gmail, Microsoft, iCloud, and IMAP
Pricing: Free with limited AI; Plus $10/mo or $8.25 annual; Pro $20 or $16.58 annual
Limitations: Workflows are still marked “SOON,” and Auto-Labels and Auto-Drafts are limited betas.
How to pick
If new mail should start work that continues across your calendar, CRM, and task list, go with Carly AI. It is the only option here that triggers on arrival, sends with the controls you set, and runs Gmail and Outlook together.
If the daily interface is the problem, buy a better client: Shortwave for Gmail search, Superhuman for keyboard speed.
If you want drafts and nothing sent, Fyxer or Inbox Zero. For sorting alone, SaneBox. For a shared team inbox, Gmelius. If you already pay for a general assistant, Gemini or ChatGPT will cover the basics inside their eligibility limits.
For narrower comparisons, see best AI email assistants for Gmail and best AI email agents.
FAQ
What is the best AI assistant for Gmail in 2026?
Carly AI, for email-triggered work that has to continue across CRM, calendar, and task systems. Shortwave and Superhuman are stronger if what you actually want is a new daily email client, and Gemini is the lowest-friction option inside Gmail if you are eligible.
Can a Gmail AI assistant send email?
Yes, with different controls. ChatGPT sends after your approval, Grok sends once Gmail scopes are enabled, Gemini Spark replies in eligible tasks, and Claude’s Gmail connector sends, replies, and forwards with approval. Carly sends from event-driven workflows with review steps wherever you want them. Fyxer and SaneBox never send.
Can an AI assistant react when a new Gmail message arrives?
Only a few genuinely can. Carly and Tasklet support new-email triggers, Grok offers filtered incoming-email triggers on SuperGrok, Gemini Spark has Gmail-filter monitors on eligible paid personal accounts, and Shortwave Business has AI filters. Ordinary ChatGPT and Claude schedules poll on a timer rather than listening for arrival.
Can one assistant handle Gmail and Outlook together?
Carly can, holding both providers and several accounts of each, addressed by name. Tasklet, Inbox Zero, Fyxer, and Spark support Microsoft mailboxes in different ways. Shortwave is Gmail-only and Gmelius has Outlook on a waitlist.
Do all of these work with personal Gmail and Google Workspace?
No. Support varies by region, plan, administrator enablement, and account type, and Gemini’s free tier is especially fragmented. Check the exact account and the exact action before you buy.
How many Gmail AI tools should I run?
Usually one inbox surface plus, if needed, one automation layer. Stacking clients creates duplicate labels, drafts, and notifications. Pick the interface that fits daily triage, then add Carly when the work needs to continue beyond what that client can do.
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See what people say
"Before Carly, I relied on a Calendly link, but the whole process felt impersonal and not very professional. Carly changed that by handling all the back-and-forth, so I'm no longer stuck in endless email threads trying to line up schedules.
Now Carly reaches out to candidates, shares my real-time availability, lets them pick a slot, then sends a Zoom link and drops it straight into my calendar. She sends reminders to both of us before each call, which has significantly reduced no-shows and last-minute confusion.
On top of scheduling, Carly acts like a full executive assistant, sending me my schedule the night before so I can prepare for each call. It reminds me of the old x.ai assistant, but Carly is noticeably smarter, faster, and better suited to my healthcare recruitment business."
