Side by side
Hexel vs Traccia
Both stand on ai agent observability tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan API
Hexel combines pre-execution policy checks with traces, run replay, and several execution planes. Teams should review the tier’s retention and support terms: Scale lists 90-day trace retention, while Enterprise lists unlimited retention and a dedicated SLA.
Visit Hexel Free plan APIWeb
Traccia combines agent tracing, evaluation, and runtime controls, with a free entry plan and paid tiers based on volume and retention. Organizations considering its HIPAA module should note that it does not provide a signed Business Associate Agreement.
Visit TracciaThe facts
| Hexel | Traccia | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API | API, Web |
| Lowest paid plan | Free or on request | Observe: $99 a month |
| Plans published | 3 | 5 |
| Maker | Not published | Not published |
| Website | hexelstudio.com | traccia.ai |
| On ai agent observability tools | #23 of 31 | #27 of 31 |
Hexel: what it does well
- Actions can pause for human approval.
- Rules can allow, deny, or require approval.
- Run traces support replay and spend attribution.
- Three execution planes serve different capacity needs.
- Free tier is available.
What to know first
- Scale pricing is usage-metered and not listed.
- Enterprise uses custom annual pricing.
- ISO 27001 and HIPAA-ready are marked in progress.
- Free usage is metered in Hexel Fleet Units.
Traccia: what it does well
- SDK traces runs, sessions, prompts, and tool calls.
- Policy limits can stop calls at runtime.
- Free Hobby plan includes 50K events.
- Open-source SDK can export traces without an account.
- Optional PII masking runs before spans leave the process.
What to know first
- Hobby retains data for seven days.
- SOC 2 Type II certification is in progress.
- No signed Business Associate Agreement is offered.
- ML-based PII detection is planned, not available.
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