Shortwave score factors
Editorial quality78
Practical utility81
Trust & transparency78
Freshness84
Engagement quality10
Momentum63
Decision guide · Reviewed Sep 23, 2026 · AI Email & Communication, AI-Native Email Clients
Shortwave
73.1
Zero
66.8Choose Shortwave when you need Gmail users who want an AI assistant that understands their whole inbox at a modest price. Choose Zero when you need privacy-conscious Gmail users and technical teams seeking a transparent, open-source inbox that does not store emails centrally.
At a glance
The practical differences
| Decision factor | Shortwave | Zero |
|---|---|---|
| Best for | Gmail users who want an AI assistant that understands their whole inbox at a modest price | privacy-conscious Gmail users and technical teams seeking a transparent, open-source inbox that does not store emails centrally |
| Not ideal for | Outlook or other mailbox users and organisations needing heavy admin controls | teams using Microsoft 365 or IMAP providers, or those wanting a conventional closed-source email client with direct telephone support |
| Pricing | A free plan covers basic use with limited AI; Personal, Business, and Enterprise plans add more AI usage and team features at the review date. Confirm current terms on the official pricing page. | At the review date, the vendor offers a free plan with core capabilities and a 7-day trial for premium subscriptions billed monthly or annually, though specific dollar figures are not published on the provided pages. Zero has announced a transition to Orchid (orchid.ai); check official pages for current pricing and availability. |
| Key difference | An assistant-centred email client that treats the inbox as searchable memory, with a free tier for individuals. | Zero processes Gmail data directly inside the client browser without permanent server-side email storage, backed by an auditable open-source codebase and self-hosting support. |
| Overall rank | #467 | #680 |
| Review verdict | A compelling alternative for Gmail users who want AI search and drafting without a premium price. Outlook users and larger teams needing admin depth should look elsewhere. | Zero suits technical professionals and privacy-conscious users who want an open-source, client-only Gmail interface with self-hosting options. It is not suitable for organizations seeking native support for Microsoft Exchange, non-Google mail providers, or long-term vendor stability without following the project's evolution into Orchid. |
Zero score factors
Editorial quality72
Practical utility74
Trust & transparency78
Freshness70
Engagement quality7
Momentum50
Shortwave strengths
- Strong AI search over inbox
- Free plan available
- Fast, modern interface
- Good voice matching
Zero strengths
- Zero email storage on vendor servers; communications remain directly between browser and Gmail
- Open-source codebase available for independent auditing on GitHub
- Option to self-host for complete data autonomy
- Complies with Google API Services User Data Policy limited use rules
- Free plan available with basic features requiring no credit card
Frequently asked
Shortwave vs Zero
Should I choose Shortwave or Zero?+
Choose Shortwave when you need Gmail users who want an AI assistant that understands their whole inbox at a modest price. Choose Zero when you need privacy-conscious Gmail users and technical teams seeking a transparent, open-source inbox that does not store emails centrally. ToolsRank scores Shortwave 73.1 and Zero 66.8; the gap reflects editorial quality, utility, trust, and freshness, not popularity or payment.
Is Shortwave cheaper than Zero?+
Shortwave: A free plan covers basic use with limited AI; Personal, Business, and Enterprise plans add more AI usage and team features at the review date. Confirm current terms on the official pricing page. Zero: At the review date, the vendor offers a free plan with core capabilities and a 7-day trial for premium subscriptions billed monthly or annually, though specific dollar figures are not published on the provided pages. Zero has announced a transition to Orchid (orchid.ai); check official pages for current pricing and availability. Compare the plan you would actually use and verify current prices on each vendor's pricing page before purchasing.
Which is better for ai email & communication?+
Shortwave currently scores higher for ai email & communication work. Zero remains the stronger pick when your priority is privacy-conscious Gmail users and technical teams seeking a transparent, open-source inbox that does not store emails centrally. Avoid Shortwave if you are Outlook or other mailbox users and organisations needing heavy admin controls.
Can I use Shortwave and Zero together?+
Yes. Shortwave stands out for an assistant-centred email client that treats the inbox as searchable memory, with a free tier for individuals. Zero stands out for zero processes Gmail data directly inside the client browser without permanent server-side email storage, backed by an auditable open-source codebase and self-hosting support. Pairing them makes sense when one workflow needs both strengths; otherwise pick the tool that matches your primary job.