Coasty
Computer Using Agents on Secure Cloud VMs That Run Forever
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Coasty - A Computer-Use-Agent that runs legacy software like a human

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Coasty is a computer use agent that operates real desktop software end to end. Started with healthcare prior auth, automating payer portals and legacy EHRs, and data removal for data privacy but now we're expanding into insurance and tax & accounting. Coasty does that work autonomously, with human takeover and full audit trails. Independently verified at 82.81% on OSWorld Verified (359 tasks), near the top of the leaderboard. No APIs required. If software has a screen, Coasty can run it.

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Maker
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Hey everyone, I'm Prateek, co-founder of Coasty. We didn't start here. Our first product was an LLM aggregation tool. When we analyzed 14,000+ agent interaction logs, we noticed the real bottleneck wasn't the models. It was operating legacy desktop software end to end. Payer portals, EHRs, freight TMS systems. Software with no API, just a screen. So we built an agent that uses the computer the way a person does. It clicks, types, reads screens, and knows when to hand off to a human. We scored 82.81% on OSWorld Verified (359 tasks), independently evaluated, which puts us near the top of the leaderboard. Happy to answer anything about how the agent works, where it fails, and what it took to get it reliable enough for regulated work.
Maker

For the developers here! Coasty is also available as an API.

You send a task in plain language, the agent gets a fresh environment, does the work, and returns structured results plus a full action log. Every click and keystroke is recorded, so you can replay exactly what the agent did. Setup takes 2 to 5 minutes per environment, then the agent runs unattended until the task is done or it decides a human should take over. It's modular so you can use the predict part of the harness to write an instruction for your own screenshots or any other part of the system. The pricing is fully transparent for every type of call you could make(at the end of ).

Docs are at . The quickstart gets you to a first running task in a few minutes. If you build something with it, tell me. I read everything in this thread.

Maker

If you want us to run it for you live or just in general, want to talk to us, here's our Calendly: .

how does the per-VM teardown actually handle stateful workloads like browser automation where you need session persistence across multiple steps

Maker

 Our VMs last forever, irrelevant of the tasks or the number of steps. And we specialize in long-horizon tasks(30m+), so we deal with this all the time.

Is there a list of all softwares it supports?

Maker

 It supports any software you can run on your desktop or the Virtual Machines we have, since it just uses a screen, mouse and keyboard.

Congrats on the launch!
The runs forever part is what stood out most agent VMs die when the session ends. Does it keep state between tasks, or reset each time?

how fast does the VM actually spin up when I need to fire off a quick agent task, is there cold start latency to worry about