Superlogical: Mitchell Hashimoto's New Company Building a Multiplexer for All Work

The launch: a terminal multiplexer company from the HashiCorp founder#

Mitchell Hashimoto has started a new company. That sentence alone was enough to send Superlogical to the top of Hacker News with 703 points and 411 comments on July 29, 2026. The HashiCorp co-founder and creator of Vagrant, Terraform, Vault, and (more recently) Ghostty is returning to building a developer tool - this time with a founding team that reads like a who's-who of infrastructure and design leadership.

The company describes its mission as building "the multiplexer for all work." They are starting with a terminal multiplexer, but the stated vision goes much further: a durable session layer that spans local development, remote access, coding agents, background jobs, production applications, live debugging, shared terminals, incident response, and multiplayer work.

The announcement came through a personal blog post by Hashimoto and the Superlogical website, both published simultaneously. Hashimoto made a point of noting he wrote the announcement himself: "No AI! Hand-written, real, and authentic."

The team: a HashiCorp-Vercel-Heroku lineage#

Superlogical's founding team is unusually deep for a seed-stage developer tools company:

• Mitchell Hashimoto - Creator of Ghostty. Co-founded HashiCorp and created Vagrant, Terraform, Vault. Served as CEO and CTO through HashiCorp's IPO.
• Jack Pearkes - First HashiCorp employee, VP of Engineering and VP of R&D.
• Alasdair Monk - Head of Experience at Poolside, VP of Design at Vercel, senior design leader at HashiCorp and Heroku. Two decades of developer-facing design.
• Hector Simpson - Designed apps, services, and agentic experiences at Poolside, Heroku, HashiCorp, and Vercel.

The investors are equally notable: Notable Capital, Amplify Partners, and angel investors including Aaron Levie (Box CEO), Patrick Collison (Stripe CEO), Tobias Lutke (Shopify CEO), Guillermo Rauch (Vercel CEO), and Armon Dadgar (HashiCorp co-founder).

What they are actually building#

The concrete first product is a terminal multiplexer - think tmux or zellij, but modern. Sessions will be accessible through web and native macOS/iOS applications. Sharing a live session with other people is built in from the start. Hashimoto says they are addressing the common papercuts of existing multiplexers: "making scrollback, selection, and scrolling all work natively."

The multiplexer is built on libghostty, the MIT-licensed terminal library Hashimoto's team extracted from Ghostty. He was explicit that Ghostty remains an independent non-profit project whose "mission, governance, license, technical goals, and roadmap do not change." Superlogical consumes the same public building block available to everyone else and will continue upstreaming shared work.

Beyond the terminal multiplexer, the vision is deliberately larger. Superlogical's website describes a future where interactive work (a person at a keyboard), automatic work (CI, background jobs), and production work (deployed systems) all share one underlying session layer. The three-part plan is: (1) build an incredible multiplexer, (2) make everything in it composable, (3) make it safe and operable in production.

What HN is saying#

The HN discussion was the second-most-commented story on the front page (411 comments) and reflects the range of reactions you would expect when a famous builder announces a new company with substantial funding.

Excitement about the team. The most-upvoted sentiment was trust in the founder. One top commenter wrote: "This is an incredible idea. I would usually be skeptical that such an engineering-focused tool would 'make it,' but Mitchell Hashimoto is one of the very few people I think can pull it off." Another added: "This guy is the inventor of quite a bit of architecture software supporting modern systems. I think it will be fine."

The "why not k8s?" question. Several commenters asked how a "durable session around work" differs from what Kubernetes already does. The replies pointed out that k8s handles orchestration and scheduling but does not provide the human-facing session layer for interactive and agent-driven work. One commenter synthesized it well: "K8s is just the last 100 meters."

Funding questions. Multiple commenters questioned why a billionaire would take venture funding. Others pointed out the practical reasons: accountability, recruiting, and strategic advice. One commenter noted: "Had it been hyper growth startup you would be looking at a16z or other bigger names." The investor list reads more like an advisory board of domain experts.

Skepticism about scope. Some commenters wondered whether a terminal multiplexer is the right starting point for such an ambitious vision. Others pointed to existing tools like tmux and zellij, asking what new ground Superlogical could cover. The counterargument: a terminal multiplexer is the narrow foundation for a broad vision, and the team has the track record to make it work.

The "ssh superlogical.jobs" moment. One commenter discovered the hiring page is accessible via ssh superlogical.jobs - a terminal-appropriate touch that generated a thread of approval.

Why it matters#

A terminal multiplexer may sound like a narrow starting point for a funded company, but it sits at an increasingly important intersection. As terminal agents become the portable runtime surface for AI development, the multiplexer layer is where human sessions, agent sessions, CI jobs, and production debugging converge. A modern multiplexer that handles scrollback, history, sharing, and reconnection natively removes friction that every developer using terminal-based coding agents hits daily.

Hashimoto's work on Ghostty proved that there is appetite for rethinking foundational developer tools when they are fast, well-crafted, and open. Superlogical is extending that same thesis to the session layer - the connective tissue between the tools, environments, and agents a developer touches in a day.

The timing is telling. A year ago, a "terminal multiplexer company" would have raised eyebrows even with this team. In mid-2026, with AI agents running in terminals, developers managing multi-session workflows across local and remote machines, and the line between interactive and automated work blurring daily, the problem feels more real than it did when tmux was written in 2007.

Sources#

• Superlogical announcement - company website
• Mitchell Hashimoto's personal post on Superlogical - personal reflection and context
• Hacker News discussion (411 comments) - community reaction
• Ghostty non-profit announcement - Hashimoto's post on Ghostty's transfer to a non-profit
• libghostty documentation - the terminal library Superlogical builds on

Continue Reading#

• Mitchell Hashimoto on Building Ghostty in Zig - Our earlier interview analysis covering Hashimoto's terminal work and Zig choice
• Terminal Agents Are the New Developer Runtime - Why terminals matter more than ever as AI agent surfaces
• Warp Open-Sources Its Agentic Terminal Stack - Another terminal company making moves in the agent era
• Git Worktrees and Parallel Agent Development - Managing multi-session development workflows with agents
• DevDigest Redesign 2026 - How we rebuilt our own developer-facing surface