# Zero Mail review (2026): is the free plan enough? > Open-source AI email client that connects your existing inboxes Checked Nov 12, 2026 ยท graded Nov 12, 2026 by ToolGPA. 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. - **Category:** Email Apps - **Made by:** Zero Email Inc - **Website:** https://0.email - **Runs on:** Web - **Who should skip it:** Skip it if you want a finished product, because the site labels Zero beta. - **Facts last checked:** Nov 12, 2026 ## Pricing As of Nov 12, 2026, Zero Mail has a free plan, and paid plans start at $20 per month (billing basis not shown). - **Pricing model:** Free plan - **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 | $20 per 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 https://0.email/pricing on Nov 12, 2026. Prices change, so confirm with Zero Mail before buying. ## 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. ## Good for - Gmail users who want AI and keyboard shortcuts without changing address - Developers who want to read or self-host the code - People who connect several inboxes to one client ## 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. ## ToolGPA grades **GPA: 1.8 out of 4**, graded Nov 12, 2026. 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. - **Value for money: D.** Pro 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. - **Free plan and trial: C.** Free 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. - **Features: C.** AI chat, summaries, labels and writing on a keyboard-driven inbox. The site labels it beta, and the free plan limits the writing. - **Ease of use: C.** No store rating on record. You connect your Gmail or Outlook accounts, and self-hosting is also offered. - **Platforms and integrations: C.** Web only. The site lists no desktop or mobile apps, and Gmail and Outlook are the connections named. These are ToolGPA's own grades. 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. ## Where it 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. The category's chart of price against score: https://toolgpa.com/charts/email ## Keep it, 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. - You could not: An email client: sending, receiving, threading and searching years of mail. - You could not: Filters that read every message as it arrives. - You could not: AI features, unless you pay a model provider for each request yourself. A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it. ## Works with Gmail, Outlook **Tags:** Email client, AI features, Keyboard-first, Open source, Self-hostable, Inbox filtering ## Alternatives - [Superhuman Mail](https://toolgpa.com/tools/superhuman): Keyboard-driven email client for Gmail and Outlook with built-in AI. [Compare](https://toolgpa.com/compare/superhuman-vs-zero-mail) - [Shortwave](https://toolgpa.com/tools/shortwave): AI email client for Gmail with an assistant, filters and split inbox. [Compare](https://toolgpa.com/compare/shortwave-vs-zero-mail) - [Spark Mail](https://toolgpa.com/tools/spark): Email client with a unified smart inbox, AI tools and team features. [Compare](https://toolgpa.com/compare/spark-vs-zero-mail) - [Mailspring](https://toolgpa.com/tools/mailspring): Open-source desktop email client for Mac, Windows and Linux. [Compare](https://toolgpa.com/compare/mailspring-vs-zero-mail) - [Fyxer](https://toolgpa.com/tools/fyxer): AI assistant that sorts email, drafts replies and takes meeting notes. [Compare](https://toolgpa.com/compare/fyxer-vs-zero-mail) ## Sources The prices, plans, platforms and features above were read from these pages on Nov 12, 2026: - https://0.email/pricing - https://0.email - https://github.com/Mail-0/Zero Page: https://toolgpa.com/tools/zero-mail Listed by ToolGPA (toolgpa.com).