Notion is pulling the plug on Notion Mail, the AI-enhanced email client it launched just over a year ago. The service will go dark across web, desktop, and iOS on September 22, marking the final chapter in a product lineage that traces back to the company’s acquisition of encrypted email startup Skiff.

The reason is striking: more than 50% of Notion Mail users now manage their email without ever opening their inbox. They’re using AI agents to handle workflows instead.

From Skiff to Notion Mail to nothing

Notion acquired Skiff, a privacy-focused email and productivity startup, on February 9, 2024. Skiff had built a small but devoted user base around encrypted email, with @skiff.com addresses and some limited crypto-adjacent features baked into the platform.

Within a year of the acquisition, Notion shut down Skiff’s standalone email services. Users got forwarding capabilities through February 2025, then the lights went off.

That something was Notion Mail, which launched in April 2025. Built primarily by engineers who joined Notion through the Skiff acquisition, it functioned as a Gmail client layered with AI enhancements. Think smart sorting, automated responses, and workflow integrations that tied email into Notion’s broader workspace tools.

Now, roughly 14 months later, Notion Mail is getting the axe too. The company announced the shutdown on June 25 via an X post, first spotted by 9to5Mac. Users have until September 22 to export their data before it’s permanently deleted.

The AI agent takeover is real

Notion isn’t framing this as a failure. It’s framing it as evidence that traditional inboxes are becoming obsolete for a growing segment of knowledge workers.

When more than half your users prefer to delegate email tasks to AI agents rather than manually sorting through messages, you’re sitting on a product whose core interface is fighting against user behavior. Notion appears to be betting that building better agents is more valuable than maintaining a prettier inbox.

What this means for investors watching productivity and AI

Notion Mail launched in April 2025. By mid-2026, the majority of its users had essentially stopped using the inbox. That’s a remarkably fast adoption curve for AI-driven workflows, even accounting for the fact that Notion Mail’s user base likely skewed toward early adopters and power users who were already comfortable with automation.

There’s a crypto angle here too, even if it’s a thin one. Skiff had offered some limited cryptocurrency-related features during its independent run. With Notion Mail’s shutdown, the last traces of Skiff’s product DNA are effectively being erased. No blockchain integrations, no token announcements, no crypto features have carried over into Notion’s current strategy.

For crypto-native productivity tools and encrypted communication platforms, Notion’s pivot might actually represent opportunity. The privacy-conscious users that Skiff originally served have been orphaned twice now — first when Skiff shut down, and again as Notion Mail disappears.