The Acquisition That Felt Like a Trap
Here's the thing about tech acquisitions that nobody tells you upfront: they rarely feel like weddings. More often, they feel like a merger of equals where one side quietly brings the checkbook and the other brings the talent — and then the talent gets redistributed within eighteen months.
That's exactly what happened when Notion acquired Skiff in February 2024. On paper, it was a beautiful match. Skiff had built something genuinely useful — end-to-end encrypted email, private document collaboration, cloud storage that didn't read your messages. Notion had the distribution engine and the capital to scale those features across its massive user base. The press release language was warm, full of words like "alignment" and "shared mission." Skiff's own announcement page still sits there, almost cheerfully, declaring that they were "extremely excited to accelerate this mission by joining forces."
I don't know about you, but when a company tells me they're "extremely excited" right before they announce a sunset date six months later, I tend to raise an eyebrow.
The timeline was brutal. February 9th, 2024: acquisition announced. August 9th, 2024: email service sunsetted. That's six months. Half a year to wind down an encrypted email platform that had taken years to build, migrate users, and establish trust. Notion gave affected users email forwarding — a courtesy, sure, but also a quiet admission that the product was dead.
For those who opted into an extension, the clock stretched to February 9th, 2025. A full year from acquisition to total shutdown. The @skiff.com addresses? Gone. No forwarding after that date. Just... silence where an inbox used to be.
What Skiff Actually Built
Before we get to the shutdown, it's worth understanding what made Skiff worth acquiring in the first place. The company wasn't just another email wrapper slapping encryption on top of SMTP. They'd built a full collaboration stack — Mail, Pages, Drive, Calendar — all end-to-end encrypted, all designed from the ground up with privacy as the default setting rather than an opt-in afterthought.
That's genuinely rare. Most "private" email services are really just Gmail or Outlook with a thin privacy veneer. Skiff was different. Their whitepaper laid out the cryptographic architecture, their GitHub showed real engineering depth, and their user base — while niche — was fiercely loyal. These were people who cared about not having their communications scanned for advertising profiles.
The Skiff announcement page still frames the acquisition in idealistic terms: "Skiff's mission was to bring freedom to the internet by helping people collaborate and communicate with confidence and privacy." There's something almost poetic about reading that now, knowing the email service was dead within a year. The mission wasn't abandoned because it failed. It was abandoned because it didn't fit the acquirer's roadmap.
And that's the pattern we keep seeing. Privacy-first startups get bought not to continue their work, but to eliminate a potential competitor, absorb their engineering talent, and quietly bury the product that threatened the parent company's data-harvesting business model.
The AI Agent Justification
Here's where the story gets interesting — and where Notion's move started influencing other email apps, according to Ars Technica's reporting on the situation.
The justification for killing Skiff's email service wasn't framed in terms of cost-cutting or strategic realignment. It was framed as technological progress. The argument, as reported, went something like this: most users have already moved past traditional email. They're using AI agents to manage their communications. Why maintain an email product when the future of inbox management looks nothing like an inbox?
I'll be honest — that argument cuts both ways.
On one hand, you can see the logic. If your user base is shifting toward AI-mediated communication — where agents read, triage, and respond to messages on your behalf — then maintaining a full email client becomes an expensive distraction. Notion's core product is a workspace. Email, even encrypted email, doesn't fit neatly into that box.
On the other hand, "most users have moved on" is a claim that deserves scrutiny. The people who used Skiff weren't using it because they hadn't discovered AI agents. They were using it because they valued privacy and encryption — things that most AI agent implementations currently handle poorly, if at all. Sending your encrypted emails to an AI agent means giving that agent access to your messages. That's a privacy tradeoff that Skiff's user base explicitly rejected.
The timing is also worth noting. This justification emerged in 2026, two years after the acquisition. If Notion truly believed email was obsolete in 2024, why acquire a mail product at all? The answer, of course, is that acquisitions are rarely about the present. They're about options — and options get exercised when the market shifts.
The Ripple Effect on Email Apps
What's striking about the Skiff shutdown isn't just what happened to Skiff users. It's how it changed the conversation around email products more broadly.
According to Ars Technica, Notion's decision influenced other email apps — presumably by signaling that even privacy-focused, well-engineered email products are vulnerable to acquisition and rapid shutdown. For competing services like Proton Mail, Tutanota, or any number of privacy-first alternatives, the Skiff example serves as a cautionary tale: you can build something great, attract loyal users, and still lose everything when a larger company decides your product doesn't fit their vision.
This creates a chilling effect. Entrepreneurs building email products now have to ask themselves: are we building for users, or are we building an acquisition target? The answer shapes everything from feature decisions to fundraising strategy. If you're building for acquisition, you optimize for integration potential. If you're building for users, you optimize for the things that matter to them — even if those things make you less attractive to potential buyers.
The Skiff case also raises questions about what happens to user data when an email service is killed. Notion offered forwarding for a period, which is more than some acquirers do. But after that window closed? Those @skiff.com addresses simply ceased to exist. Any contacts who only had your Skiff address and never received your forwarding notification? You've lost them. Permanently.
For a privacy-focused service, that's particularly painful. Skiff users had chosen their addresses deliberately — as an expression of values, not convenience. Watching those addresses vanish feels like watching a statement get erased.
What This Means for the Future of Email
The Skiff story is really a story about three competing visions for how we communicate online.
Vision one: email as infrastructure. This is the Proton Mail approach — treat email like water or electricity, a basic utility that should be secure and reliable regardless of who provides it. Under this model, acquisitions are threats because they introduce single points of failure.
Vision two: email as legacy. This is the Notion position, as reported — email is a technology that AI agents will replace, and maintaining it is an exercise in nostalgia. Under this model, acquisitions are pruning exercises, cutting features that belong to a dying paradigm.
Vision three: email as platform. This is the Skiff approach before the acquisition — email isn't just messaging, it's a foundation for encrypted collaboration. Pages, Drive, Calendar — all built on the same cryptographic principles. Under this model, acquisitions are opportunities to scale a privacy-first stack across millions of users.
Notion clearly chose vision two. They killed the email product, absorbed what they needed from the engineering team, and moved on. Whether that was the right call depends on your timeline. In the short term, it freed Notion to focus on its core workspace product. In the long term, it eliminated a privacy-focused email option for users who specifically wanted one.
The AI agent argument will only get stronger as these tools improve. But improvement takes time, and in the meantime, there are millions of users who need secure communication today — not whenever AI agents figure out encryption.
Skiff's email is gone. Its @skiff.com addresses are history. But the questions it raised about acquisition, privacy, and what we owe to users who trusted us with their communications? Those are still very much alive.