After a Three‑Year Hiatus, HashiCorp Co‑Founder Returns with Superlogical: Building a Multiplexer for Everything

Superlogical product overview

Superlogical is a startup founded by Mitchell Hashimoto, the creator of Vagrant, Terraform and Vault. Its first product is a modern terminal multiplexer that aims to become a “multiplexer for everything”, spanning local machines, remote hosts, sandbox environments, CI pipelines, production systems and AI agents.

Problem statement

Developers now work across heterogeneous environments (local, remote, sandbox, CI, production) and interact with both human‑driven tools and automated or AI‑driven workloads. Existing tools treat these domains as isolated silos:

Interactive tools assume a human behind them.

Automation tasks disappear into logs.

Production environments enforce separate permission models.

The fragmentation predates the recent AI boom and has long limited system management, continuous integration and remote collaboration.

Proposed solution

Superlogical proposes a persistent session layer that spans applications and environments, exposing structured data and APIs, preserving full history, and being both programmatically driven and human‑visible. The solution is built in three incremental steps:

Build a high‑quality terminal multiplexer.

Make everything inside it composable.

Ensure safe operation in production.

Terminal multiplexer details

The first step delivers a terminal multiplexer that groups multiple terminal windows into a long‑lived session. Users can close the application or switch devices and reconnect without losing state. Compared with existing tools such as tmux or Zellij, Superlogical adds modern capabilities:

Web client for browser‑based access.

Native macOS and iOS clients.

Built‑in real‑time session sharing from day one.

Fixes for long‑standing issues like scrolling, selection and paging.

The design treats the terminal as the connective tissue linking developers, AI agents, toolchains and infrastructure, providing a foundation for future capabilities.

Technical foundation

The product is built on libghostty, the open‑source component library behind the Ghostty terminal emulator. libghostty is released under the MIT license; Superlogical will contribute generic terminal‑related work back to the upstream library while preserving Ghostty’s non‑profit governance and licensing.

Founding team

Jack Pearkes – HashiCorp’s first engineer, early product builder.

Alasdair Monk – Former Head of Experience at Poolside, former VP of Design at Vercel, with over two decades of developer‑experience design.

Hector Simpson – Experience designer for apps, services and agents at Poolside, Heroku, HashiCorp and Vercel.

Funding snapshot

Seed round of $10 million led by Notable Capital and Amplify Partners, with angel investors including Stripe co‑founder Patrick Collison, Shopify founder Tobias Lütke, Box founder Aaron Levie and Vercel CEO Guillermo Rauch.

References

Superlogical website: https://www.superlogical.com/

Mitchell Hashimoto personal blog post: https://mitchellh.com/writing/superlogical

Glenn Solomon social media post: https://x.com/glennsolomon/status/2082491431592308884