If there’s one thing Mac users are blessed with, it’s a variety of great email apps. In fact, depending on the day, I’ll often flit between the Gmail web app, Mimestream, Spark, and Outlook for work.
As we covered last year, Notion’s AI-adjacent Notion Mail tried to do some cool things. Sadly, it seemingly didn’t find an audience, with its developer deprecating the app soon because it believes more people use agentic AI to manage their inbox without opening the app.
And honestly? I was a little bummed. Notion Mail had a unique UI that felt right at home next to the company’s main app and Notion Calendar. And, while browsing my inbox, I spotted an email from the team at Slashy that might just fill the gap.
Slashy doesn’t want you to open your inbox
A quick glance at Slashy will show that it’s definitely cut from a similar cloth to Notion Mail. For one, its clean design makes it a looker — it’s easy to navigate, with options for highlighting important emails or everything.
What makes it unique is that Slashy will attempt to learn from a user’s emails and reply frequency to highlight what’s important, and use their voice to make responses feel more natural.
If that sounds dystopian, then yes, you’re not alone. I had the same thought, and we’ll touch on how successful it is in that regard in a moment. But, as someone swamped with press releases daily (not a complaint, keep ‘em coming!) I was impressed by how well Slashy categorises and labels my emails.
In many ways, it feels akin to Notion Mail’s labels, but Slashy wants you to handle your email from a distance, if at all. It automatically runs scheduling workflows to help identify meeting times, and can lean into Model Context Protocol (MCP) to tie in nicely with Claude, something I’m yet to fully get to grips with.
All of this is to say it’s an email app that looks great, and yet it wants you to leave its processes to handle your inbox - and it does so remarkably well.
With zero setup, it pulled through a bunch of handy contact info, complete with contextual history, for more than 20 people I’d emailed in recent weeks. It also highlighted my scheduling, including the days I work in a London office and when I’m home, and when my upcoming vacation is.
Put simply, it knows me better than I know myself.
“Your voice, not GPT slop”
I recently waxed lyrical about Cotypist, a Mac app that makes writing in certain situations simpler by using predictive text. I was impressed at the time by how much it’s attuned itself to my voice, to the point where, once again, it predicts my sentences (or maybe I’m very predictable).
I still use Cotypist across other apps, but when opening an email to reply, I genuinely thought I’d drafted something already in Slashy.
The use of humour, the tone, the friendly nature (if I do say so myself), it was all, well, me. Aside from the existential dread of being a writer who relies on personable copy to stand out from the AI content-absorbing machine, and who has now seemingly had my card numbered, I couldn’t quite believe it.
Every email I tried to reply to, Slashy had basically laid out exactly what I was going to say, albeit with a prompt to change it if I wanted to, like turning a positive response to a negative one, or amending the tone to be more professional.
There’s even a handy sidebar that allows you a sandbox to draft a reply, find specific emails related to the current thread, or just summarize the whole thing using Claude.
Add to that integrations with Notion so it can read and write to Notion databases, Slack, and even iMessage (albeit the last one isn’t working for me in macOS Golden Gate beta), and it can do a really great job at ensuring you barely ever need to look at your emails.
If you’re interested in Slashy, it’s available now for Gmail accounts, with Outlook coming soon. It’ll cost you $30 per month or $300 per year for unlimited inboxes and AI usage.
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