Arize Phoenix vs Hex
Updated June 2026 · A structured head-to-head comparison.
Open-source LLM tracing and evaluation
The verdict
Both Arize Phoenix and Hex are credible ai machine learning tools, and the right pick comes down to your priorities.
Choose Arize Phoenix if you want broader platform coverage. Open-source LLM tracing and evaluation
Choose Hex if you'd rather have a higher overall rating (4.7/5). Collaborative analytics notebooks with AI.
Arize Phoenix vs Hex: side by side
| Dimension | Arize Phoenix | Hex |
|---|---|---|
| Starting price | Free – $50/mo | Free – $36/user/mo |
| Free plan | Yes | Yes |
| Pricing model | Open source | Freemium |
| Best for | Developers, Ai Teams | Data Teams |
| Platforms | Api, Self Hosted, WebWinner | Web |
| Rating | 4.4/5 | 4.7/5Winner |
Arize Phoenix key facts
- Vendor
- Arize AI
- Pricing
- Open source — Free – $50/mo
- Free tier
- Yes
- Platforms
- Api, Self Hosted, Web
- Best for
- Developers, Ai Teams
- Editor rating
- 4.4 / 5
- Founded
- 2020
- Headquarters
- Berkeley, USA
Hex key facts
- Vendor
- Hex
- Pricing
- Freemium — Free – $36/user/mo
- Free tier
- Yes
- Platforms
- Web
- Best for
- Data Teams
- Editor rating
- 4.7 / 5
- Founded
- 2019
- Headquarters
- San Francisco, CA, USA
Frequently asked questions
Is Arize Phoenix better than Hex?
Neither is universally better — Hex 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 Arize Phoenix or Hex cheaper?
Arize Phoenix is the more affordable of the two to get started, at free – $50/mo. Arize Phoenix starts at free – $50/mo; Hex starts at free – $36/user/mo.
Can Arize Phoenix replace Hex?
Yes for most teams — both are ai machine learning tools with heavily overlapping features. The main trade-offs are pricing and platform support, covered in the comparison above.