Our Verdict
Sai, from Simular, is a computer-use agent: instead of connecting to apps through APIs, it works the way a person does, clicking and typing in browsers, desktop apps, file systems and terminals. You describe a task in plain language, and it runs either on its own cloud computer (Windows or Linux, so your laptop can stay closed) or on your own Mac or Windows machine. The features built for real repeat work are recurring tasks you teach once and schedule, persistent memory of your logins and preferences, live viewing with approvals for important actions, and notifications by iMessage, SMS or Telegram. Simular also says its research agent, Agent S, was the first to beat human performance on the OSWorld benchmark — a claim about the underlying research, not a guarantee for your tasks. The trade-offs: the free plan's daily credit allowance isn't stated, Pay as you go is $50/mo for $50 of usage with cloud computer time counted against it, and the next step up is a big jump to $500/mo. Like any agent that acts on your accounts, it needs careful setup and approvals before you trust it with anything important. This verdict is built from Sai's own published pages — RankerToolAI has not run a hands-on lab test of Sai.
How Sai Scores
| Criterion | Score | Rating |
|---|---|---|
| Capability Works across browsers, desktop apps, files and terminals |
8.5/10 | |
| Automation Recurring tasks, persistent memory, skills |
8.5/10 | |
| Control & Safety Live view, approvals, notifications |
8.0/10 | |
| Value for Money Free tier, then $50/mo usage or $500/mo |
6.5/10 | |
| Transparency Free credit allowance not published |
6.5/10 |
✓ Pros
- Works through real screens, so it can handle apps that have no API or integration
- Runs on its own cloud computer, so tasks keep going after you close your laptop
- Teach a task once and schedule it to run again
- Remembers your setup, logins and preferences between sessions
- Watch it live and approve important actions, with alerts by iMessage, SMS or Telegram
- Free Explore plan to build and test workflows before paying
✗ Cons
- The free plan's daily credit allowance isn't published
- Pay as you go's $50 covers both AI usage and cloud computer time, so heavy use runs out quickly
- Big jump from $50/mo to $500/mo for unlimited use
- No refund policy or annual pricing is listed
- An agent that acts in your accounts needs careful testing and approvals before you rely on it
Sai
Free Explore plan · Pay as you go $50/mo · Sai Unlimited $500/mo
What Sai Offers
Computer Use
Operates software through the screen, clicking and typing in browsers, desktop apps, file systems and terminals.
Cloud Desktop or Your Own Device
Runs in its own Windows or Linux cloud computer, or on your own Mac, Mac mini or Windows PC.
Recurring Tasks
Teach Sai a task once, then run it again on a schedule, such as weekly reports or follow-ups.
Persistent Memory
Keeps your setup, logins, preferences and context between sessions.
Live View & Approvals
Watch Sai work, approve important actions, and get updates by iMessage, SMS or Telegram.
Skills & API
Extend Sai with skills for specific tasks, share them with your team, and use the new developer API.
Sai Pricing (2026)
| Plan | Price | Details |
|---|---|---|
| Explore | $0 | Daily credits (amount not stated) · limited Windows cloud computer · build and test workflows |
| Pay as you go ⭐ | $50/mo | 50,000 credits ($50 of usage) · cloud computer billed only while running, up to 5 at once · or use your own device |
| Sai Unlimited | $500/mo | Unlimited AI usage (fair use) · always-on cloud computer · concierge · one workspace |
| Enterprise | Custom | Managed scaling · SSO, RBAC, SOC 2 · custom integrations · SLA |
On your own Mac or Windows device, only AI usage counts against credits. Credits can be topped up anytime, and Pay as you go can be cancelled anytime. Check Sai's current pricing before you subscribe.
Try Sai
Free Explore plan · Pay as you go $50/mo · Sai Unlimited $500/mo
Try Sai →Affiliate link — we earn a commission if you upgrade, at no extra cost to you.
Best Sai Alternatives
Sai isn't the only option in this space. Here's how the leading alternatives compare:
- Claude — Anthropic's assistant can also operate a computer through Claude Cowork and Claude Code, if you already pay for Claude. See our Claude review.
- Perplexity — Perplexity's Computer agent is aimed at research-heavy browsing tasks. See our Perplexity review.
- ChatGPT agent — OpenAI's agent mode browses and completes tasks inside ChatGPT. See our ChatGPT review.
Frequently Asked Questions
Is Sai free?
Yes, partly. The Explore plan is free with a daily credit allowance and limited access to a Windows cloud computer. Sai doesn't publish how many daily credits you get.
How much does Sai cost?
Pay as you go is $50/mo for 50,000 credits ($50 of usage), Sai Unlimited is $500/mo, and Enterprise is custom.
Does Sai need my computer to stay on?
No. Sai can run on its own cloud computer, so tasks continue after you close your laptop. You can also run it on your own Mac or Windows device.
What can Sai do?
Sai says it handles research, lead sourcing, follow-up drafting, scheduling, file organisation, spreadsheet updates, document handling and recurring reports.
Who makes Sai?
Sai is made by Simular Inc., whose research agent Agent S is described as the first to outperform human performance on the OSWorld benchmark.