AI Inbox Agent: all 15 products
Works your email, sorting, labeling, archiving and routing incoming mail without being asked each time, and in a few cases sending the reply. We found 15 products that do this, from 15 companies. All 15 can be bought with a sign-up form. All 15 publish a price. Monthly plans in US dollars run $15 to $97, typically $25.
The 15 products
| Compare | Product | What it does on its own | Built for | How you buy | Starting price |
|---|---|---|---|---|---|
| Instantly | Reads replies to outbound email and sends the answer with no approval step. In the vendor’s words: “Agent replies to everything instantly” Source (opens in a new tab) · checked Sep 24, 2026 | Any size | Sign up yourself | $97 a month | |
| Carly | Sorts incoming mail, answers it and chases people who have not replied. | Any size | Sign up yourself | $35 a month | |
| Front | Answers incoming customer email in a shared inbox and closes the conversation. In the vendor’s words: “Run complex customer work with our omnichannel AI agent” Source (opens in a new tab) · checked Sep 24, 2026 | Any size | Sign up yourself | $0.05 a conversation | |
| Gmelius | Sorts incoming Gmail messages into categories and routes them to the right person. In the vendor’s words: “Sorts and classifies emails” Source for the vendor’s words (opens in a new tab) Where it says AI does it: “Meli categorizes messages into actionable labels and filters out noise like marketing and outreach emails, so you focus only on what matters.” Source for where it says AI does it (opens in a new tab) · checked Sep 26, 2026 | Any size | Sign up yourself | $19 a month per user | |
| Hiver | Triages a shared mailbox and takes routine requests through to a reply. In the vendor’s words: “AI agents triage, resolve requests and act across your systems.” Source (opens in a new tab) · checked Sep 24, 2026 | Any size | Sign up yourself | $25 a month per user | |
| Inbox Zero | Sorts and labels every message and runs plain-language rules against new mail. In the vendor’s words: “Sorts and labels every email” Source for the vendor’s words (opens in a new tab) Where it says AI does it: “Our AI assistant will label everything automatically.” Source for where it says AI does it (opens in a new tab) · checked Sep 24, 2026 | Any size | Sign up yourself | $20 a month per user | |
| Lindy | Watches the inbox, writes replies in your voice, sends them and books the meetings they ask for. In the vendor’s words: “Lindy drafts, schedules, and replies without leaving your email.” Where it says AI does it: “The AI teammate that will 3x your output.” Source (opens in a new tab) · checked Sep 29, 2026 | Any size | Sign up yourself | $29.99 a month per user | |
| Maestro Labs | Tags every incoming email by priority and intent inside Outlook and flags the follow-ups it finds. The tagging sits on the Professional plan, not the free plan. In the vendor’s words: “MailMaestro automatically tags emails by priority, and intent” Source for the vendor’s words (opens in a new tab) Where it says AI does it: “We automatically prioritise incoming emails for you with AI” Source for where it says AI does it (opens in a new tab) · checked Sep 24, 2026 | Any size | Sign up yourself | $15 a month per seat | |
| SaneBox | Moves mail it judges unimportant out of the inbox into a separate folder. In the vendor’s words: “Unimportant messages automatically move to a separate folder” Source for the vendor’s words (opens in a new tab) Where it says AI does it: “SaneBox uses sophisticated algorithms and machine learning to automatically sort your incoming emails into different folders based on their importance.” Source for where it says AI does it (opens in a new tab) · checked Sep 24, 2026 | Any size | Sign up yourself | $24 a year | |
| Serif | Organizes the inbox, drafts replies and keeps following up until missing paperwork arrives. In the vendor’s words: “Serif starts organizing your inbox and drafting replies immediately” Source for the vendor’s words (opens in a new tab) Where it says AI does it: “Serif brings everything you need to train AI agents to handle your most complex document and email work into one unified platform. No technical expertise required.” Source for where it says AI does it (opens in a new tab) · checked Sep 26, 2026 | Any size | Sign up yourself | $30 a month | |
| Shortwave | Runs AI filters on new mail that label, archive, delete or star it. In the vendor’s words: “Take control of your inbox with custom AI filters. Automatically label, star, archive, and more with scripts you write in plain English.” Source (opens in a new tab) · checked Sep 26, 2026 | Any size | Sign up yourself | $30 a month per seat | |
| Stamp | Sorts incoming mail into the owner’s own labels and carries out the action each label calls for. In the vendor’s words: “…specify what actions Stamp should take on all emails that are categorized into that label” Where it says AI does it: “You can configure AI labels in plain English and specify what actions Stamp should take on all emails that are categorized into that label.” Source (opens in a new tab) · checked Sep 24, 2026 | Any size | Sign up yourself | $20 a month | |
| Superhuman | Labels incoming mail by type and archives marketing, cold pitches and social updates without being asked. In the vendor’s words: “Superhuman AI can automatically archive marketing, cold pitches, and social network updates.” Source (opens in a new tab) · checked Sep 26, 2026 | Any size | Sign up yourself | $25 a month per member billed annually | |
| Drag | Reads each incoming email, works out what it needs and closes the request in connected tools. In the vendor’s words: “Varley working on its own: it reads every email, acts in your tools, and resolves, or hands off when it should.” Where it says AI does it: “High confidence resolves autonomously; anything uncertain hands off to a teammate with the full context Varley gathered, so your team starts from the middle, not from scratch.” Source (opens in a new tab) · checked Oct 1, 2026 | Any size | Sign up yourself | $24 a month per user | |
| Zapier | Watches for new mail and carries the work through connected apps on its own. In the vendor’s words: “Equip your Agents with company knowledge and have them do work across 9,000+ apps” Source (opens in a new tab) · checked Sep 24, 2026 | Any size | Sign up yourself | Free tier |
What to know before you buy
- Most inbox products sort, label and file mail on their own but only draft replies. If you want replies sent, ask for the sentence on the vendor’s page that says it sends.
- Aggressive filing that hides mail you wanted is the complaint specific to this job. Check what it filed away in the first weeks.
- The cheapest plan can cover one email account and one feature. Price the plan that covers the accounts you actually use.
- In reviews, cancellation and billing are the most repeated themes, followed by drafts that need heavy editing.
More from our research
How real (from our first round of research)
Most inbox products draft and then stop, and the vendors say so plainly. One vendor’s own pricing FAQ states it cannot send emails on your behalf and only drafts them, and another’s own blog says auto-send is rare even where it is technically supported. Of the 14 we checked in the first round, 4 act all the way to a sent reply with no person in the loop, and the other 10 are counted because they act on the mailbox itself, sorting, labeling, archiving and routing without being asked each time. Most of what you can buy here sorts your mail; few products send the reply.
Watch for
Aggressive auto-filing that hides mail you wanted is the complaint specific to this job. What low-star reviews keep saying is mail disappearing from the inbox and being hard to find again. Cancellation and billing is the most repeated theme across every review page we checked for this job, and draft quality needing heavy correction before sending is named in the low-star reviews. Some reviewers also describe the first setup as tedious. Tier gaps matter: one product’s cheapest published plan covers one email account and one feature, so the real entry for a working setup is higher than the headline figure.
Questions to ask in the demo
- Does an AI do this, or does a rule? If the answer is “when X happens it sends Y”, you are buying automation, and it should not cost AI prices.
- Does it send, or does it draft? Ask for the sentence on their page that says it acts on its own.
- Does it do it on its own on this plan, or on the one above? The setting that lets it act without you is often a tier up from the entry price.
Quick answers
How many AI products are there for keeping up with email?
We found 15 products from 15 companies that do this themselves. 15 can be bought with a sign-up form and 0 through a sales call.
How much does an AI Inbox Agent cost?
Monthly plans priced in US dollars run $15 to $97, typically $25 a month. 15 of 15 publish a price. Check the monthly cap and what extra use costs.
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Cite this
AI Inbox Agent: all 15 products. The AI Agents Report, Iterategy, 2026. https://iterategy.com/research/ai-agents/jobs/ai-inbox-agent/