rabbit OS3 vs Simular Sai
Published · Updated
Which is better, rabbit OS3 or Simular Sai?
It depends on what you want done. Pick rabbit OS3 if you want an agent that works across your own computers, and like having a dedicated device. Pick Simular Sai if your errands are repetitive tasks on your computer that you'd like an agent to do. Both are personal agents. Prices as of November 2026: rabbit OS3, from $20/mo; Simular Sai, price not published.
On our rubric, rabbit OS3 scores higher, 6.7 to 6.2. Both handle 1 of our 6 everyday errands fully on their own, so the difference is in how they work and what they cost. Here's where each one wins.
rabbit OS36.7
Choose rabbit OS3 if you want an agent that works across your own computers, and like having a dedicated device.
Visit rabbit OS3
Simular Sai6.2
Choose Simular Sai if your errands are repetitive tasks on your computer that you'd like an agent to do.
Visit Simular SaiErrands, side by side
| Errand | rabbit OS3 | Simular Sai |
|---|---|---|
| Book reservations, rides and travel | With your OK | With your OK |
| Shop and check out | No | With your OK |
| Handle email and calendar | With your OK | With your OK |
| Fill forms and click through websites | With your OK | Yes |
| Cancel subscriptions, chase refunds, lower bills | No | No |
| Research and compare | Yes | With your OK |
Scores side by side
| Criterion | rabbit OS3 | Simular Sai |
|---|---|---|
| Gets it done (30%) | 6.5 | 7.0 |
| Reach (15%) | 7.0 | 5.5 |
| Knows you (15%) | 7.0 | 6.0 |
| Safety & control (15%) | 7.0 | 6.5 |
| Value (15%) | 7.5 | 5.5 |
| Trust (10%) | 5.0 | 6.0 |
| Overall | 6.7 | 6.2 |
Where they work
| Clicks through websites for you | ||
|---|---|---|
| Works in the background or on a schedule | ||
| Remembers you | ||
| Works over text messages | ||
| Talks by voice | ||
| Phone app |
Price and fine print
| rabbit OS3 | Simular Sai | |
|---|---|---|
| Type | Personal agent: computer agent | Personal agent: computer agent |
| Made by | rabbit | Simular |
| Our rank | #16 of personal agents | #22 of personal agents |
| Price | From $20/mo (as of November 2026) | Price not published (as of November 2026) |
| Free plan | Yes: free usage plus 30 phone minutes (as of November 2026) | Not published (as of November 2026) |
| Refunds | Not stated | Not stated |
| Best for | Tinkerers who want an agent across their computers, with the option of a dedicated device. | People with repetitive computer tasks they'd like an agent to take over. |
rabbit OS3: pros and cons
- Works across your own connected computers
- Background jobs
- Free tier with phone minutes
- Bring your own key or local model
- The r1 device had a rough launch
- Suits tinkerers more than most people
- r1 price not on the page
- Less proven at real errands
Simular Sai: pros and cons
- Operates your apps like a person would
- Runs locally and in the cloud
- Good for repetitive screen tasks
- Open-source Agent S framework
- No published consumer pricing
- Supported platforms not clearly stated
- No texting or phone app
- Less suited to everyday errands
rabbit OS3 vs Simular Sai: questions
Is rabbit OS3 better than Simular Sai?
On our rubric, rabbit OS3 scores higher (6.7 vs 6.2). Simular Sai is still the better pick if your errands are repetitive tasks on your computer that you'd like an agent to do.
Which is cheaper, rabbit OS3 or Simular Sai?
rabbit OS3: from $20/mo, free plan: yes (as of November 2026). Simular Sai: price not published, free plan: no (as of November 2026).