Happycapy vs Simular Sai
We give Happycapy a 3.2 GPA and Simular Sai a 3.0, out of 4.0. Happycapy grades higher on value for money and platforms. Simular Sai grades higher on features. They get the same grade on the free plan and ease of use.
Price, platforms and features side by side. The table says where each price was read and when.
Happycapy
Cloud sandbox computer where AI agents run skills and automations
Simular Sai
Computer-use agent that operates a cloud desktop or your own computer
How we grade them
| 3.2GPAHappycapyVery good | 3.0GPASimular SaiVery good | |
|---|---|---|
| Value for money | BPro is $17 a month billed annually, or $20 monthly, for 2,000 credits, frontier models and a 2-core sandbox with 50 GB of storage. That's about typical here. Plus is $42 and Max $167 on the annual plan. There are no separate API keys to pay for. | CPay as you go is $50 a month, more than twice what agents in this category usually start at. It all comes back as 50,000 credits, which pay for both the AI and the cloud computer's time, and heavier use needs top-ups. Unlimited is $500 a month for one workspace. |
| Free plan and trial | BFree every month, but small: 250 credits and a basic sandbox, with Claude access and basic models through skills. Frontier models, Automations and Capy Mail all start at Pro. | BExplore is free, with credits refreshed daily and room to create and test workflows. But the pricing page doesn't say how big the daily allowance is, and access to the cloud computer is limited. So we can't tell you how far it goes. |
| Features | BAgents browse, handle files and run code in a cloud sandbox while you watch, and skills add research, slides, websites and video. You can start a task by email. But Automations are still labelled beta and capped at 3 on Pro, and only GitHub and Notion are listed as integrations. | AIt sees the screen and clicks through browsers, desktop apps, files and terminals. Its cloud computer keeps your logins between sessions and carries on with your laptop shut. Save a task as a skill and it reruns on a schedule. You can watch it work and approve the critical steps. |
| Ease of use | BIt runs in the browser with the models already included, so there are no API keys to sort out and no terminal to open. There's no rating on record to go by, so a B. | BYou teach it a task once, watch it work and approve the critical steps, and it pings you by iMessage, SMS or Telegram when it needs you. There's no rating on record to go by, so a B. |
| Platforms and integrations | AWeb, iPhone and Android, with connections to GitHub and Notion and its own email address through Capy Mail. It can also hook up to your own computer, though that part is for Macs only. | BIt runs in the browser and on your own Mac or Windows machine, with cloud computers on Windows or Linux. No phone app is listed, though it can message you by iMessage, SMS or Telegram. There's an API, and an MCP server that Claude Code, Codex and Cursor can call. |
| Best for | agents in a cloud computer, with no terminal | repeat tasks in software that has no API |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Happycapy and Simular Sai. How we grade
Where they differ
- Happycapy starts at $17 per month, billed annually (Pro); $20 billed monthly. Simular Sai starts at $50 per month (Pay as you go, includes 50,000 credits).
- Only Happycapy lists iOS and Android apps.
- Only Simular Sai lists macOS and Windows apps.
- Happycapy also covers app builder, research and presentations.
At a glance
| Happycapy | Simular Sai | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $17 per month, billed annually (Pro); $20 billed monthly | $50 per month (Pay as you go, includes 50,000 credits) |
| Free plan | 250 credits a month in a basic sandbox, with Claude model access, basic models through skills and custom skill creation. | Explore plan: a credit allowance refreshed daily, limited access to a cloud-based Windows computer, workflow creation and testing, and community support. |
| Free trial | None listed | None listed |
| Web | ||
| macOS | ||
| Windows | ||
| iOS | ||
| Android | ||
| Made by | Happycapy (Trickle Pte. Ltd.) | Simular Inc. |
| Price read from | happycapy.ai | sai.work |
| Checked | Oct 5, 2026 | Oct 6, 2026 |
Who each one suits
Happycapy
- People who want agent tools like Claude Code without a terminal
- Recurring reports and monitoring that run while you are away
- Trying several frontier models under one subscription
Simular Sai
- Recurring tasks in desktop software or portals that offer no API
- People who want automation that keeps running with their laptop closed
- Developers adding computer use to a coding agent through MCP
Worth knowing
Happycapy
- The Free plan is capped at 250 credits a month; frontier models, Automations and Capy Mail start at Pro.
- Automations are limited by plan (3 on Pro, 5 on Plus, 10 on Max) and are still labeled beta.
- A Team plan is offered, but the pricing page shows no price for it.
- The local-computer connection described in the docs covers Macs only.
Simular Sai
- The free Explore plan has a daily credit allowance whose size the pricing page does not state, and only limited access to a cloud computer.
- On Pay as you go, the $50 a month of credits pays for both AI usage and cloud computer time; heavier use needs top-ups.
- Sai Unlimited costs $500 a month and covers one workspace; additional workspaces are upgraded separately.
- Running Sai on your own device is offered for Mac and Windows, while the cloud computers are Windows or Linux.
Key features
Happycapy
- Cloud sandbox
- Agents work in an isolated cloud sandbox, separate from your computer, where they browse the web, handle files and run code. You can watch each step and stop a task at any time.
- Skills and Skill Store
- Installable skills add abilities such as building websites, deep research, slides, images, video and games. You can also create your own or use open-source skills.
- Automations
- A scheduled prompt runs inside a Project daily or on an interval, using its files and context, then saves or sends the result. The feature is labeled beta.
- Capy Mail
- Each account gets an email address that can send and receive mail, so a task can be started by email and its results sent back. Only approved senders are processed.
- Many models, one subscription
- Models from several AI labs, including Claude, GPT, DeepSeek and Kimi along with image and video models, are included without separate API keys.
- Connect My Mac
- A connected Mac lets the agent read and save local files, run local scripts and CLI tools and use desktop apps, moving work between the sandbox and your machine.
Simular Sai
- Operates real interfaces
- Sai sees the screen and clicks and types through browsers, desktop apps, file systems and terminals, so it can handle software that offers no API.
- Dedicated cloud computer
- Sai works in its own Windows or Linux cloud machine, which keeps your logins, preferences and context between sessions and carries on after you close your laptop.
- Bring your own device
- Sai can run on your own Mac, Mac mini or Windows machine instead. On Pay as you go, only AI usage is then charged, with no computer time.
- Scheduled reruns that reuse steps
- A task taught once can be saved as a reusable skill and rerun on a schedule. Simular says the unchanged steps become code, so repeat runs need fewer model tokens.
- Approvals and live view
- You can watch Sai's computers work, approve its critical steps, and get notified by iMessage, SMS or Telegram when a task needs you.
- API and MCP server
- The Simular Platform exposes Sai through an API key and an MCP server that coding agents such as Claude Code, Codex and Cursor can call.
Plans
Happycapy
Free$0
250 credits a month, a basic sandbox, Claude model access, basic models through skills and custom skill creation.
Pro$17
per month, billed annually
2,000 credits a month, a 2-core sandbox with 4 GB RAM and 50 GB storage, frontier models, 3 Automations and Capy Mail. $20 billed monthly.
Plus$42
per month, billed annually
5,000 credits a month, 5 Automations and a Capy Mail quota of 2,000 emails. $50 billed monthly.
Max$167
per month, billed annually
22,000 credits a month, a 4-core sandbox with 8 GB RAM and 200 GB storage, 10 Automations and priority human support. $200 billed monthly.
Simular Sai
Explore$0
A daily credit allowance, limited access to a cloud-based Windows computer, creating and testing workflows, and community support.
Pay as you go$50
per month
50,000 credits a month ($50 of usage) for AI models and computer time, up to 5 cloud computers at once billed only while running, and credit top-ups.
Sai Unlimited$500
per month, per workspace
Unlimited AI usage under fair-use guidelines and an always-on Windows or Linux cloud computer. Heavy use may shift Sai to an efficiency mode.
EnterpriseCustom
Everything in Sai Unlimited, plus managed scaling, a dedicated account team, SSO and RBAC, custom integrations and SLA guarantees.
Ways to pay less
Happycapy
- Annual discount
Two months free with annual billing
The pricing page marks annual billing as 2 months free: Pro shows $17 a month instead of $20, Plus $42 instead of $50 and Max $167 instead of $200.
Simular Sai
No public discounts listed.
