vioscaleAI
Comparison

LangSmith vs Pydantic AI

On the evidence we track, Pydantic AI leads this comparison with a composite score of 66/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

LangSmith full profile →Pydantic AI full profile →
Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
LangSmith52
★Pydantic AI66
Score
vioscaleAI score
LangSmith52 / 100low · 12%
Pydantic AI66 / 100medium · 62%
Pricing
Free tier
LangSmith–
Pydantic AI✓
Model
LangSmith–
Pydantic AIfreemium
Price level
LangSmith–
Pydantic AImid
Starting price
LangSmith–
Pydantic AI$49
Transparent
LangSmith–
Pydantic AI✓
Integrations
Count
LangSmith–
Pydantic AI7
Security
Certifications
LangSmith–
Pydantic AISOC 2 Type II
Disclosure policy
LangSmith–
Pydantic AI✓
Gdpr
LangSmith–
Pydantic AI✓
Hipaa
LangSmith–
Pydantic AI✓
Soc2
LangSmith–
Pydantic AI✓
Trust center
LangSmith–
Pydantic AIhttps://pydantic.dev/security
Vulnerabilities
Reliability
Status page
LangSmith✓
Pydantic AI–
Adoption
Dependent repos
LangSmith–
Pydantic AI0
Github stars
LangSmith–
Pydantic AI20,608
Package downloads weekly
LangSmith–
Pydantic AI3,171,945
Activity
Commits last 30d
LangSmith–
Pydantic AI100
Release
Cadence days
LangSmith–
Pydantic AI1
History
LangSmith–
Pydantic AI20 items
License
Spdx
LangSmith–
Pydantic AIMIT
Language
Primary
LangSmith–
Pydantic AIPython
Market
Availability
Content
Faq
LangSmith4 items
Pydantic AI7 items

Capabilities

Feature-by-feature on the axes that matter for mlops & llmops tools. “-” means undocumented, not absent.

Core
Tool role
LangSmithLLM observability / eval
Pydantic AILLM observability / eval
Deployment
Self-hostable / OSS core
LangSmith✗
Pydantic AI✓
Managed cloud available
LangSmith✓
Pydantic AI✓
On-prem / VPC deployment
LangSmith✗
Pydantic AI✓
Observability
LLM tracing / observability
LangSmith✓
Pydantic AI✓
Evaluation (offline / LLM-judge / human)
LangSmith✓
Pydantic AI✓
Dev
Prompt management + versioning
LangSmith-
Pydantic AI✓
Tracking
Experiment tracking / model registry
LangSmith-
Pydantic AI✓
Serving
Model serving / inference endpoint
LangSmith✗
Pydantic AI✓
Interop
OpenTelemetry / OpenLLMetry compatible
LangSmith-
Pydantic AI✓
Framework-agnostic
LangSmith✓
Pydantic AI✓
Gateway
Multi-provider model support
LangSmith-
Pydantic AI✓
Data
No-train-on-customer-data guarantee
LangSmith-
Pydantic AIUnknown

What each one is

The product in its own terms, so the numbers below have context.

LangSmith

LangSmith enables users to observe, evaluate, and deploy AI agents through a web interface that requires no coding. The platform provides tools for agent engineering and monitoring.

Independently observed

Pydantic AI

Leader

An observability and development platform for production AI agent systems that combines tracing, evaluation, and inference gateway capabilities for building reliable LLM applications.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

LangSmith

Pricing not documented yet.

Pydantic AI

Leader
from $49/moSubscriptionFree tier

Free tier for 10M spans/month. Paid plans from $49/month with flat-rate overage pricing at $2 per million spans.

  • PersonalFree
    • 10M spans per month
    • Hard cap to prevent bill shock
  • Team$49/month + $2 per million spans
    • Overage billing at flat rate
    • Seat limits apply
  • Growth$249/month + $2 per million spans, unlimited seats
    • No seat limits
    • Overage billing at flat rate
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
LangSmith✓
Pydantic AI✓
Deployment
Cloud / SaaS
LangSmith✓
Pydantic AI✓
Self-hosted
LangSmith✗
Pydantic AI✓
On-premise
LangSmith✗
Pydantic AI✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

LangSmith

Not documented yet.

Pydantic AI

Leader
10 total
  • Pydantic AI
  • Pydantic Evals
  • OpenTelemetry
  • Model Context Protocol (MCP)
  • Snowflake
  • FastAPI
  • OpenAI
  • LangChain
  • HuggingFace
  • Prefect
Independently observed
Still deciding?

LangSmith or Pydantic AI: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.