kitio.aiAdded Oct 28, 2026
Pydantic Logfire
Freemium · $49/moOpenTelemetry observability for Python apps and AI agents
What is Pydantic Logfire?
Pydantic Logfire is an observability platform from the team behind the Pydantic library, built on OpenTelemetry. It shows traces, logs and metrics for Python apps and gives detailed views of LLM calls and agent runs, including Pydantic AI agents.
Logfire auto-instruments popular libraries such as FastAPI, OpenAI, Anthropic and databases, so you see LLM calls alongside the rest of your application. You can query trace data with SQL and build dashboards.
A free tier covers small projects, and paid plans are billed by data volume. SDKs exist for Python, JavaScript and Rust, and any OpenTelemetry source can send data.
Features
- OpenTelemetry tracing
- LLM call views
- Auto-instrumentation
- SQL queries on traces
- Dashboards
Tags
Releases
+ Submit new release- Listed
Pydantic Logfire was added to the directory.
Organization
Pydantic
🇬🇧 United Kingdom
Listed by kitio.ai · unverified owner
Pricing
- Pricing model
- Freemium
- Paid options from
- $49/mo
- Billing frequency
- Monthly
Pydantic Logfire plans
Personal
Free
- 10M records per month, hard-capped
- 3 projects, 30-day retention
- 1 seat + 2 read-only guests
Team
$49/mo
- 10M records included, $2/M after
- 5 seats included, $25/extra seat
- AI evaluations and human review
Growth
$249/mo
- Unlimited seats and projects
- Up to 90-day retention
- Priority support and BAA
Enterprise
Contact sales
- Compliance support
- Self-hosting options
Prices in USD, checked Oct 28, 2026. Plans change often, so confirm on the Pydantic Logfire site.Official pricing
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Pros and cons
Pros
- Full-stack plus LLM traces
- Easy setup for Python
- SQL access to data
Cons
- Python-first experience
- Fewer eval tools than rivals
- Volume pricing needs monitoring
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Q&A
What is Pydantic Logfire?
Pydantic Logfire is an observability platform from the team behind the Pydantic library, built on OpenTelemetry. It shows traces, logs and metrics for Python apps and gives detailed views of LLM calls and agent runs, including Pydantic AI agents.
How much does Pydantic Logfire cost?
Pydantic Logfire is freemium, with paid plans from $49/mo.
Is there a free version of Pydantic Logfire?
Yes. Pydantic Logfire has a free plan, and paid plans add more usage and features.
What are the main features of Pydantic Logfire?
OpenTelemetry tracing, LLM call views, Auto-instrumentation, SQL queries on traces, Dashboards.
Who makes Pydantic Logfire?
Pydantic Logfire is made by Pydantic.
What are the best alternatives to Pydantic Logfire?
Popular alternatives include LangSmith, Datadog LLM Observability, Arthur.