Clerk vs Duo Security
Updated June 2026 · A structured head-to-head comparison.
Multi-factor authentication and device trust
The verdict
Both Clerk and Duo Security are credible authentication tools, and the right pick comes down to your priorities.
Clerk — Auth and user management for devs.
Choose Duo Security if you'd rather have broader platform coverage. Multi-factor authentication and device trust
Clerk vs Duo Security: side by side
| Dimension | Clerk | Duo Security |
|---|---|---|
| Starting price | Free – $25/mo | Free – $3/user/mo |
| Free plan | Yes | Yes |
| Pricing model | Freemium | Freemium |
| Best for | Developers, Startups | Smb, Enterprise, It Teams |
| Platforms | Web, Api | Web, Ios, Android, ApiWinner |
| Rating | 4.7/5 | 4.6/5 |
Clerk key facts
- Vendor
- Clerk
- Pricing
- Freemium — Free – $25/mo
- Free tier
- Yes
- Platforms
- Web, Api
- Best for
- Developers, Startups
- Editor rating
- 4.7 / 5
- Founded
- 2020
- Headquarters
- San Francisco, CA, USA
Duo Security key facts
- Vendor
- Cisco
- Pricing
- Freemium — Free – $3/user/mo
- Free tier
- Yes
- Platforms
- Web, Ios, Android, Api
- Best for
- Smb, Enterprise, It Teams
- Editor rating
- 4.6 / 5
- Founded
- 2010
- Headquarters
- Ann Arbor, USA
Frequently asked questions
Is Clerk better than Duo Security?
Neither is universally better — Clerk 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 Clerk or Duo Security cheaper?
Clerk is the more affordable of the two to get started, at free – $25/mo. Clerk starts at free – $25/mo; Duo Security starts at free – $3/user/mo.
Can Clerk replace Duo Security?
Yes for most teams — both are authentication tools with heavily overlapping features. The main trade-offs are pricing and platform support, covered in the comparison above.