Zero Mail review (2026): is the free plan enough?
Open-source AI email client that connects your existing inboxes
Black Friday: is there a Zero Mail sale?
Zero Mail report card
Weak · out of 4.0 · graded Nov 12, 2026
Best for an AI layer over your existing inbox
Zero is an open-source email client with AI chat, labels and writing that connects to the inboxes you already have. The site marks it as beta, the free plan allows one email connection, and Pro is $20 a month with the billing basis unstated, which is the top of what email tools charge.
Who Zero Mail is for
- Fits if you want AI summaries and replies over a Gmail or Outlook inbox
- Works for developers who are happy with a beta and might self-host
Who Zero Mail is not for
- Skip it if you want a finished product, because the site labels Zero beta
- Tight if you have more than one inbox, since free allows one connection
- Pricey if you want the full AI writing and summaries: Pro is $20 a month
- Watch out: no desktop or phone apps are listed, only the web
- Watch out: the pricing page does not say whether $20 is monthly or annual
Why Zero Mail gets a 1.8
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- DValue for moneyPro is $20 a month, which is where the dearest tenth of email tools starts. The page does not say whether that is billed monthly or yearly.
- CFree plan and trialFree plan: one email connection, AI chat with the inbox, basic labeling and limited AI writing. Unlimited connections and full AI writing need Pro. There is a 7-day Pro trial.
- CFeaturesAI chat, summaries, labels and writing on a keyboard-driven inbox. The site labels it beta, and the free plan limits the writing.
- CEase of useNo store rating on record. You connect your Gmail or Outlook accounts, and self-hosting is also offered.
- CPlatforms and integrationsWeb only. The site lists no desktop or mobile apps, and Gmail and Outlook are the connections named.
What these grades rest on. Graded from this listing, whose facts were read from Zero's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/zero-mail#review"><img src="https://toolgpa.com/badge/zero-mail.svg" alt="Zero Mail: 1.8 GPA on ToolGPA" width="196" height="56"></a>Where Zero Mail stands among email apps
Zero Mail's GPA of 1.8 is higher than 0 of the 70 other email apps we grade, and level with 2.
It stands best on platforms and integrations (C, above 5 of 70) and worst on value for money (D, above 0).
Its paid plans start at $20 a month, against a middle price of $4.92 for the category: 49 of the 56 others that charge start lower.
On features, ease of use and platforms it scores 2.0 out of 4. 45 tools score higher and cost less.
Each grade against the category
Every bar is all 71 email apps we grade, cut by the letter each got. Zero Mail’s own letter is outlined.
- DValue for moneyAbove 0 of 70, level with 11
- CFree plan and trialAbove 4 of 70, level with 42
- CFeaturesAbove 0 of 70, level with 44
- CEase of useAbove 1 of 70, level with 48
- CPlatforms and integrationsAbove 5 of 70, level with 19
Price against what you get
Each dot is one of 67 email apps. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Zero Mail, or make your own?
Keep it
To replace Zero Mail you would be making an email client: sending, receiving, threading and searching years of mail. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 68 of the 70 other email apps grade higher. It costs $240 a year. Zero Mail is open source, so there is a third way: take its code and run it yourself.
What you could not
- An email client: sending, receiving, threading and searching years of mail.
- Filters that read every message as it arrives.
- AI features, unless you pay a model provider for each request yourself.
What this rests on. Zero Mail’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Zero Mail?
Zero is an email client in beta that sits on top of existing accounts such as Gmail and Outlook rather than hosting mail itself. It adds AI chat over the inbox, automatic labels, thread summaries and one-click replies, and is driven largely by keyboard shortcuts. Its code is published on GitHub under the MIT license.
Worth knowing
- The site labels Zero as beta, and the vendor's pricing page does not say whether $20 is billed monthly or annually.
- The free plan allows one email connection; unlimited connections need Pro.
- Zero is a web client; no desktop or mobile apps are listed on the site.
- The pricing page lists Enterprise support and a Slack channel without prices.
Key features
- Keyboard-driven inbox
- Shortcuts for opening, replying, archiving and marking read, plus a command palette for search (Cmd+K), aim to process mail without the mouse.
- AI chat with your inbox
- Ask questions or give instructions in natural language, such as finding an invoice from a sender or replying to a person, on every plan.
- Summaries and AI writing
- Pro generates thread summaries and one-click replies; the free plan has limited AI writing.
- Labels and categories
- Free accounts get basic labeling; Pro adds automatic labeling to sort incoming mail.
- Self-hosting
- The README on GitHub describes running Zero on your own server, connected to Gmail and other providers.
Zero Mail pricing
As of Nov 12, 2026, Zero Mail has a free plan, and paid plans start at $20 per month (billing basis not shown).
- Starts at
- $20 per month (billing basis not shown)
- Free plan
- One email connection, AI chat with your inbox, basic labeling and limited AI email writing.
- Free trial
- 7-day free trial of Zero Pro
| Plan | Price | What you get |
|---|---|---|
| Free | $0 | One email connection, AI chat with the inbox, basic labeling and limited AI writing. |
| Pro | $20per month, billing basis not shown | Unlimited connections, auto labeling, one-click AI writing and replies, and instant thread summaries. |
| Enterprise | Custom | Everything in Pro plus a dedicated Slack channel and priority customer support. |
Read from 0.email on Nov 12, 2026. Prices change, so confirm with Zero Mail before you buy.
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Common questions
Does Zero Mail have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. Zero Mail is listed for Web.
Does Zero Mail have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. Zero Mail is listed for Web.
Is Zero Mail open source?
Yes. Zero Mail is open source, according to its own site. It can also be run on a server of your own.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 12, 2026.