Tomorrow vs. Canary Mail: AI writing help, or an AI agent
Canary Mail is one of the best IMAP clients with AI built in. Tomorrow is in the same category — a real IMAP client — but goes further: a proactive, approval-gated agent that prepares and automates the work, not just helps you write.
You want an AI that prepares actions and automates workflows — not just drafts and summaries — while you stay in control of every send.
You mainly want AI writing assistance and built-in encryption inside a polished, well-established desktop and mobile client.
The honest summary
Canary Mail is a genuinely good product, and it gets something right that a lot of “AI email” tools don’t: it’s a real IMAP client that works across providers, with AI writing features and a strong privacy/encryption story. If what you want is a polished client that can draft and summarize, it’s a solid pick.
Tomorrow sits in the same category — a full IMAP client you live in — but the AI is a different kind of thing. Canary’s AI helps when you ask. Tomorrow’s agent works ahead of you: it reads what came in, prepares the reply or the follow-up, builds automations from plain language, and waits for your approval before anything happens.
Feature comparison
| Feature | Tomorrow | Canary Mail |
|---|---|---|
| Full email client (not a digest/concierge) | Yes | Yes |
| Native IMAP — any provider, custom domains | Yes | Yes |
| Mail stays on your own server, no lock-in | Yes | Yes |
| AI-drafted replies & thread summaries | Yes | Yes |
| Proactive agent that prepares actions for you | Yes | On-demand |
| Plain-language workflow automation | Yes | No |
| Acts in outside tools (invoices, tasks) | Yes | No |
| Approval gate on every agent action | Yes | No |
Where Tomorrow pulls ahead
Agentic, not just assistive. Drafting and summarizing on demand is the floor. Tomorrow proactively prepares replies, surfaces the threads that need you, chases unanswered mail, and turns “email this client an invoice” into a real action.
Automation from plain language. Describe a workflow — “when a supplier emails an invoice, create it in Moneybird” — and Tomorrow builds the recipe and connects the tool from 1000+ integrations, plus any API or a browser fallback. Canary keeps you inside the mail app.
Control by design. Every side-effecting action is approval-gated, so the agent can do more because you stay in the loop. See exactly how Tomorrow connects over IMAP.
Where Canary Mail is still a fine choice
If your priority is AI writing assistance plus built-in encryption in a mature client across desktop and mobile, Canary delivers that well. Tomorrow’s edge is for people who want the inbox to do the work — prepare, automate, and act — rather than only help them write faster.
Frequently asked questions
What is the best Canary Mail alternative with AI?
Tomorrow is a strong Canary Mail alternative for people who want more than AI writing help. Both are real IMAP clients that work on any provider, but Tomorrow adds a proactive, approval-gated AI agent that prepares replies, chases follow-ups, and automates workflows from plain language.
Is Tomorrow a real email client like Canary Mail?
Yes. Like Canary, Tomorrow is a full email client you use as your main inbox — read, search, organize, write, and send — over native IMAP and SMTP. It is not a digest service or an AI layer that sits outside your mailbox.
How is Tomorrow different from Canary Mail?
Canary focuses on AI writing assistance and encryption inside a polished client. Tomorrow focuses on agentic depth: it proactively prepares actions, automates multi-step workflows, and can act in outside tools — with every action gated behind your approval.
Does Tomorrow keep my email private?
Yes. Your mailbox stays on your own server over standard IMAP/SMTP — Tomorrow does not relocate your mail into a proprietary backend, and there is no lock-in.
The AI inbox that works on any email address
Connect any mailbox — Gmail, Outlook, Fastmail, or a custom domain — and let Tomorrow prepare your replies and automations, with your approval before anything sends.
