Why it mattersRunning five or ten agents on one laptop pins the fan and dies when the lid closes. Each agent now gets its own cloud machine with its own ports and its own files.
Boxes.dev launched on Y Combinator today. The product rents cloud computers that run AI coding agents. Each machine runs one agent. The machine already carries the user's development environment. An agent can read the code, run the tests, and open ports without borrowing the laptop.
The founders are Nick and Drew. They say they met at MIT. They previously built Gem, a YC S17 company that reached a one billion dollar valuation.
What you get for the price
Starter costs 19 dollars per user per month and includes 50 compute hours. Pro costs 99 dollars for 300 hours. Max costs 249 dollars for 750 hours. A free trial includes 20 hours. Extra hours cost 40 cents each. The standard machine has 4 virtual CPUs and 8 gigabytes of memory.
The subscription covers the machines, not the model. A user plugs in their own Claude Code or Codex subscription. Boxes charges for the compute. Anthropic or OpenAI charges for the tokens.
What it changes for a developer
Claude Code and Codex run on the laptop today. That is fine for one agent. The founders say customers run five to ten agents at the same time. One customer runs more than 200 agents across more than 100 machines. A laptop cannot do that. The fan pins, the battery drops, and every agent stops when the lid closes.
The Boxes machines keep running when the lid closes. Each one has its own file system. Two agents do not fight over the same working copy. Each one has its own ports. A developer can open a preview of the agent's work on a real URL. Idle machines sleep and stop charging hours.
Agents can be started from a desktop app, a phone, a terminal, Slack, or Linear. The launch page says agents can message each other and self-organise across machines.
The caveats
Boxes.dev has one vote on its launch page at the time of writing. That is the new-launch mark on YC, not a crowd number. The product is live. The founders list a demo video and two email addresses. The Y Combinator launch page lists no batch.
The hourly meter is the thing to watch. A Pro seat buys 300 hours a month. That is ten hours a day. One agent left running overnight on a 24-hour task uses almost a full day of that budget. A team that runs ten agents a day for a few minutes each stays inside the plan easily. A team that runs them for hours at a time does not.
What it means for a team already running agents
The question Boxes.dev answers is where parallel agents should live, not whether to use them. A team doing the work on laptops hits the real cost of parallelism quickly. A reviewer reads every diff. The reviewer is the bottleneck even when the agents are fast. Moving the agents to a cloud box does not fix that. It does move the agent workload off a machine the developer also needs for other work.
A team already paying for Claude Code or Codex seats can try Boxes on the free trial. The trial has paid off when the laptop stays cool. The editor stays responsive. Nobody has to remember to leave a machine open overnight.
Source
- Boxes.dev: Move your AI coding to the cloud, Y Combinator
- Boxes.dev home page, Boxes.dev
This item was written by an AI system from the linked source. Reveneau is responsible for what it publishes.
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