Sai

The autonomous computer fleet at your command

Productivity

Artificial Intelligence

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I like that it remembers how I like things done instead of making me re-explain every time, which saves token usage a lot.

Having followed Simular's previous releases, Sai feels like a massive step forward for agentic workflows. What immediately stands out is the practical focus on operating at the interface layer—being able to handle legacy desktop apps, internal portals, and tasks behind logins without needing custom APIs is a huge win.

A few highlights that really make this release stand out:

• True Parallel Fleet Architecture: Running tasks across multiple dedicated cloud computers rather than a single local instance makes scaling complex workflows seamless.

• Smart Snapshot & Cost Efficiency: Reducing token usage without sacrificing screen-reading accuracy brings the cost per task down significantly (and makes the free tier viable).

• High OSWorld Benchmark Score: Scoring 73% on OSWorld 2.0 while staying lower in cost per task than competing models shows serious engineering optimization behind the scenes.

• Thoughtful Safety & Adaptation: The ability to gracefully pause, ask for human input on major UI redesigns, and use tiered approvals builds real trust for production use.

Excited to see how the team continues to refine handling edge cases and dynamic layouts. Congrats to the whole Simular team on another great launch! 🚀

Hey PH — I'm Richard (Chih-Lun), part of the crew helping ship Sai.

It's been fascinating to watch the evolution: local machines, then a shared VM, then dedicated VMs for each of us, and now a full agent fleet for everyone.

Huge thanks to everyone who helped get this out the door. Really grateful to have been part of it.

A final file is useful, but I also need to know how it was made. Can I see which apps Sai opened and which files it changed? Is there a run log I can share with a teammate?

Congrats on the launch, Simular team!

How do you guys ensure that all runs are deterministic while still having this "thinking" part when, let's say, the form changes and we have to enter another value? Thinking from a perspective where I have to fill out hundreds of website forms almost daily, but those forms are updated monthly.

@Simular @agidude Congrats one the PH launch ! , Does it have human in loop control / fully autonomous ?

I've been waiting for something like this that doesn't need a ton of setup just to automate basic desktop tasks, hope it delivers

I’m Yulia, a designer at Simular. One thing I kept coming back to while designing Sai: when the computer starts doing the work for you, the interface has to change too. You’re no longer designing screens for someone to operate - you’re designing a way for people to delegate, understand what’s happening, and stay in control.

That shift has been one of the most interesting design problems I’ve worked on. Sai can operate computers on its own, but making that autonomy feel understandable, trustworthy, and genuinely useful is what turns the technology into a product.

Very excited that Sai is finally out in the wild! Try it, break it, and tell us what feels weird. I’ll be in the comments all day! 🚀

Our internal tool barely has an API, so most automation products stop before the real useful part.

A computer that can work through the app itself opens up tasks we have left manual for years.

My work rarely stays in one tab. I go from email to a native app to a spreadsheet just to finish one request. If Sai is able to work across the desktop, then it will be very useful to me.

Congrats on the launch, @justin2025 ! If Sai gets better at my usual file names and checks over time, that could save a surprising amount of setup.

Do you have any becnchmarks for accuracy on common tasks like booking or form filling?

Do you see this replacing RPA tools or is it a different category entirely?

I'm Li Hau, engineer at Simular.

I spent years building apps that assumed a human would be sitting there doing the clicking. Then I watched how people actually work: twelve tabs, three apps, copying a value from one into another, all day. The interface was never the product — the tasks were.

So we built Sai, a robosecretary, and give Sai a fleet of autonomous computers. Each computer runs command, navigates app, check its own work. What you can do on a computer, can be done by Sai's computer.

The hardest and coolest part wasn't one agent. It was many. Running a fleet of autonomous computers in parallel — keeping them coordinated, recoverable, and honest about what they actually did — is where most of our engineering went.

I'll be in the comments all day — especially happy to talk about the failure cases.

Hey ProductHunt,

I'm JC, representing the research team behind Sai.

We're releasing Sai for free --- to free everyone from the repetitive busywork of clicking and typing on a computer, so we can all spend time on more fulfilling, creative, and impactful work than operating a computer.

"Did you say free? Doesn't Sai use LLMs??"

Yes! Sai operates a fleet of autonomous computers for complex personal and business workflows. You delegate a task to Sai, and it orchestrates the best and most efficient models: reasoning models for pulling multiple documents from your Drive, state-of-the-art vision models to click on any pixel on the screen, and efficient verifiers to make sure each computer action is safe and correct for the task.

"Then how is free possible?!?"

You know what's better than using LLMs? Not using LLMs (at least not for everything). After Sai completes your task once, it learns to repeat the task with 10-100x cost savings in future runs, so we're able to release this free tier for a mass audience along with our paid tier for power users.

"Are the machines free also?"

Yes, Sai's free tier comes with one remote machine, dedicated just for you for 30min per day. We learned from our invite-only release of Sai since March 2026 that the majority of routine workflows can be completed within 30min per day of machine time. So we've optimized Sai's infrastructure so that you get a full personal machine just like your own.

"So how do I get started?"

Go to https://www.sai.work/, and Sai, your first robosecretary, will show you how autonomous computers live and work in a new digital world --- giving you more freedom in yours.