The AI Email Assistant for Gmail That Actually Answers

Gmail already has AI. So why is your inbox still full?

Gmail is arguably the most AI-assisted inbox on the planet. Smart Reply suggests three canned responses under every message. Smart Compose finishes your sentences. Gemini's "Help me write" will draft a whole email from a prompt. And yet, if you run a small business on Gmail, the same thing happens every morning: you open the inbox and there they are. The pricing question. The availability question. The "did you get my last email?" follow-up. Twenty messages that each need a decision, a knowledge lookup and a send, and every scrap of AI in the product is waiting for you to do all three.

That is not a flaw in Gmail's AI. It is a category limit. Assistants make the person at the keyboard faster. They cannot do anything until you open the email, and they stop the moment the draft exists. The bottleneck in a customer-facing inbox was never typing speed; it was that a human had to show up for every single message. An assistant that halves your writing time still leaves you attending one hundred percent of your email.

InReply approaches the problem from the other end. It is an email agent, not an assistant: it connects to your existing Gmail account via Google OAuth and works on the mailbox itself. When a customer email arrives, InReply reads it, works out what kind of enquiry it is, writes a reply grounded only in your business's knowledge base, and either sends it (Autopilot) or saves it as a draft in Gmail for your review (Ghost Mode). You handle the emails that genuinely need you. The routine ones handle themselves.

This page walks through the difference in detail: what an agent does that an assistant cannot, how InReply fits into Gmail without changing anything about Gmail, and how it compares to Gemini and to the draft-first tools (Fyxer, Ellie, Jace) you have probably already seen. Every competitor fact is dated so you can check it yourself.

Assistant vs agent: the distinction that actually matters

Almost every AI email product for Gmail is an assistant. The workflow is always the same: an email arrives, you open it, the AI proposes text, you edit, you press send. Gemini works this way. So do Fyxer, Ellie and Jace, which go a step further by preparing drafts in advance, in your voice, so the review is faster. These are real improvements, and for personal email they are often exactly the right tool.

An agent runs a different loop entirely. The trigger is not you opening the email; it is the email arriving. The knowledge source is not the model's general training; it is your documents. And the final step is not "hand a draft to a human"; it is either send the reply or, when the answer is not in the knowledge base, deliberately leave the email for a person. The human moves from operator to supervisor.

Run the numbers on a real inbox and the gap is stark. Say fifty customer emails arrive a day and a drafting assistant cuts each one from four minutes to two. You have saved an hour and forty minutes, which is genuinely good, but you still personally processed fifty emails. An agent that answers the thirty-five routine ones outright leaves you fifteen. That is not a faster version of the same job. It is a different job.

For the full mechanics of the agent model, see how the AI email agent works, or compare it with hiring a human email answering service.

Works with the Gmail you already have. Literally nothing to install

Most Gmail AI tools live in your browser: a Chrome extension that injects buttons into the compose window, or a full replacement client you are asked to move into. Both approaches have the same tax. Extensions only work in the browser they are installed in, they break when Gmail's interface changes, and every teammate has to install and configure their own copy. Replacement clients ask you to abandon an inbox your team has used for a decade.

InReply asks for neither, because it does not touch the Gmail interface at all. You connect your Gmail account once, via the standard Google OAuth consent screen, and from that point InReply operates at the mailbox level. There is no add-on to install, no Workspace Marketplace listing to hunt for, no extension per teammate, and nothing new in your compose window. Gmail on your laptop, your phone and your team's machines looks identical to how it looked yesterday.

That architecture has a practical consequence worth spelling out: InReply works whether Gmail is open or not. An extension does nothing while your browser is closed. A mailbox-level agent classifies and answers the 9pm enquiry while you are at dinner, and the reply (sent, or drafted, depending on your mode) is sitting in the thread when you look in the morning.

From connection to first reply, the pipeline is:

1. Connect Gmail via OAuth. One consent screen, revocable at any time. No passwords shared, no forwarding rules, no MX changes, and your mail never moves anywhere.
2. Give it your knowledge. Your FAQs, documents, policies and prices become the knowledge base. This is the only material InReply answers from: your actual cancellation policy, not a model's guess at one.
3. Let playbooks route each email. Playbooks control tone, behaviour and routing per scenario, so a warm, chatty playbook can handle sales enquiries while a precise, careful one handles billing.
4. Humans get the exceptions. Emails that need judgement, or answers that are not in the knowledge base, are surfaced in the actions list with urgent flagging instead of receiving an invented reply.

Ghost Mode: the drafts appear in Gmail, where you already work

The sensible first question about any tool that can send from your account is "how do I try this without letting it send anything?" Ghost Mode is the answer, and it is available on every plan, not gated behind an upgrade.

In practice, teams run Ghost Mode for a week or two, watch real answers to real customer emails accumulate in their Gmail drafts, correct anything they do not like in the knowledge base, and then switch on Autopilot for the scenarios that have earned it. The graduation is gradual and entirely under your control.

InReply vs Gemini and the draft-only Gmail tools (July 2026)

Competitor facts last verified 22 July 2026

Gemini for Gmail is the default, and for personal drafting it is hard to argue with: it is native, it knows your thread, and as of 2026 it is bundled into Google Workspace Business plans rather than sold as a separate add-on (pricing guides retrieved 22 July 2026 list Business Standard at $14/user/month with an annual commitment). But "Help me write" is exactly what it says. It writes when you ask, from general model knowledge plus the thread, and you send. It does not know your refund policy, it does not act while you are away, and it will happily draft a confident answer to a question your business would answer differently.

Fyxer prepares draft replies in your voice for Gmail and Outlook, at $22.50/user/month (Starter) to $37.50/user/month (Professional) billed annually per its pricing page, retrieved 22 July 2026. Its own FAQ is admirably direct about the boundary: "Fyxer can't send emails on your behalf. We only draft your emails. We never send them." That makes it a good personal productivity tool and a categorically different thing from an agent. See our InReply vs Fyxer comparison and Fyxer AI review.

Ellie is a browser extension that drafts replies in your writing style inside Gmail (and Outlook on the web), with a 7-day free trial; its homepage states that "drafts sit in your Drafts folder, and nothing sends until you say so" (retrieved 22 July 2026). Note the architecture as much as the behaviour: as an extension it works where it is installed, whereas a mailbox-level agent works everywhere, including while your browser is closed. See InReply vs Ellie.

Jace organises your inbox and prepares drafts for quick approval ("Approve drafts instantly"), listed at $20/month (Plus) and $40/month (Pro) billed yearly on its homepage, retrieved 22 July 2026. The pitch is faster review, which is honest and useful, but a human still reviews and sends every message. See InReply vs Jace and our Jace AI review.

Honest scope: business email, not personal triage

A page like this should tell you when not to buy. InReply is built for customer-facing business email: the hello@, info@ and bookings@ traffic where the same questions arrive daily and each unanswered hour costs goodwill or a sale. It is deliberately not a personal inbox tool. It will not summarise your newsletters, triage your subscriptions or tidy a decade of personal correspondence, and if that is the job, a drafting assistant or an AI-native client is the better purchase. Our roundup of the best AI email assistants for small business covers both categories honestly.

The flip side of that narrow scope is depth where it counts. Because InReply only answers from your knowledge base, a reply about your cancellation policy states your cancellation policy. Because playbooks control tone and behaviour per scenario, your sales replies and your billing replies do not sound like the same robot. And because everything the AI cannot answer lands in a shared actions list with urgent flagging, the emails that need a human are visible instead of buried under the ones that did not.

Teams get proper access too: members join the workspace with their own accounts and per-inbox access, so nobody is passing around the password to hello@. If your shared mailbox is the real pain, the shared inbox software page covers that angle in depth.

Set up in minutes, priced per workspace

There is no migration and no rollout project. Connect Gmail via OAuth, add your knowledge, start in Ghost Mode, and watch drafts appear in the inbox you already use. Plans are a flat monthly price per workspace, never per seat: Starter at £39/month with 500 credits and 1 inbox, Growth at £79/month with 2,000 credits and 3 inboxes, Scale at £149/month with 5,000 credits and 5 inboxes, and Business at custom pricing from 10,000 credits with unlimited inboxes. Adding a teammate never raises the bill.

Mixed environments are fine, too: a workspace can run a Gmail inbox and an Outlook inbox side by side. If your business lives on Microsoft, the AI email assistant for Outlook page is the mirror of this one. Every plan starts with a 14-day free trial, no credit card required. See full pricing.