Mercury vs Square
Updated June 2026 · A structured head-to-head comparison.
The verdict
Both Mercury and Square are credible expense management tools, and the right pick comes down to your priorities.
Choose Mercury if you want a higher overall rating (4.7/5). Banking built for startups.
Square — Payments and POS for businesses.
Mercury vs Square: side by side
| Dimension | Mercury | Square |
|---|---|---|
| Starting price | Free | Free |
| Free plan | Yes | Yes |
| Pricing model | Free | Usage-based |
| Best for | Startups | Retail, Smb |
| Platforms | Web, Ios, Android | Web, Ios, Android, Api |
| Rating | 4.7/5Winner | 4.5/5 |
Mercury key facts
- Vendor
- Mercury
- Pricing
- Free — Free
- Free tier
- Yes
- Platforms
- Web, Ios, Android
- Best for
- Startups
- Editor rating
- 4.7 / 5
- Founded
- 2017
- Headquarters
- San Francisco, CA, USA
Square key facts
- Vendor
- Block
- Pricing
- Usage-based — Free
- Free tier
- Yes
- Platforms
- Web, Ios, Android, Api
- Best for
- Retail, Smb
- Editor rating
- 4.5 / 5
- Founded
- 2009
- Headquarters
- Oakland, CA, USA
Frequently asked questions
Is Mercury better than Square?
Neither is universally better — Mercury edges ahead on overall rating, but the best choice depends on price, platforms, and your use case. See the side-by-side table above.
Is Mercury or Square cheaper?
Mercury is the more affordable of the two to get started, at free. Mercury starts at free; Square starts at free.
Can Mercury replace Square?
Yes for most teams — both are expense management tools with heavily overlapping features. The main trade-offs are pricing and platform support, covered in the comparison above.