Side by side

PetalTrace vs VoltOps

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.

PetalTrace

Free plan APILinuxMac+3

PetalTrace brings tracing, cost analysis, run comparison and replay into one developer-facing toolset. Teams considering deployment should account for authentication being disabled by default.

Visit PetalTrace

VoltOps combines agent tracing with evaluation, prompt management, automation, and deployment tools. Its free Developer plan has defined seat, project, trace, and retention limits, while Core starts at $50 a month.

Visit VoltOps

The facts

	PetalTrace	VoltOps
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	API, Linux, Mac, Self-hosted, Web, Windows	API, Self-hosted, Web
Lowest paid plan	Free or on request	Core: $50 a month
Plans published	1	4
Maker	Not published	Not published
Website	docs.petallabs.io	voltagent.dev
On ai agent observability tools	#22 of 31	#26 of 31

PetalTrace: what it does well

Captures prompts, tool calls, token use and costs.
Compares runs for content and cost differences.
Replays runs with different models or temperatures.
Accepts standard OpenTelemetry traces.
The public repository identifies an MIT license.

What to know first

Authentication is future functionality and disabled by default.
Documented trace storage uses SQLite.
No commercial pricing or usage limits are stated.

VoltOps: what it does well

Traces calls, tool executions, and agent interactions.
Alerts cover latency, errors, and token usage.
Prompt changes can be rolled back or promoted.
RAG supports uploads, Notion syncing, and website crawling.
Free Developer plan includes 250 traces per month.

What to know first

Developer plan retains data for seven days.
Developer plan is limited to one seat and project.
Enterprise pricing is custom and not listed.

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