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Software Development · head to head

LangSmith vs Windsurf

LangSmith logo

LangSmith

Software Development

Know what your agents are really doing

From
Free
Rated
-
Full reviewWebsite
Windsurf logo

Windsurf

Software Development

The agentic IDE

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: LangSmith usage-based pricing applies beyond included traces; LCU charges at $1.50/LCU and LSU at $1.00/LSU; Windsurf recently rebranded to Devin Desktop, creating product identity confusion
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which LangSmith and Windsurf actually diverge.

Attributes where LangSmith and Windsurf differ
AttributeLangSmithWindsurf
Pricing modelfreemiumUnknown
PlatformsWebmacOS, Linux, Windows
FoundedUnknown2021

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Software Development).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in LangSmith

Nothing recorded that Windsurf does not also cover.

Only in Windsurf

  • Cascade AI agent
  • Agentic programming
  • Context-aware assistance
  • Automated command execution
  • Multi-file understanding
  • Intelligent code generation
  • Real-time debugging
  • Integrated terminal

What people use each for

The jobs each tool is most often brought in to do.

LangSmith

  • Tracing agent execution step-by-step in productionnot Windsurf
  • Detecting agent failures affecting latency and costnot Windsurf
  • Monitoring token usage and latency percentilesnot Windsurf
  • Clustering traces to identify failure modesnot Windsurf
  • Self-hosting traces within VPC for data residencynot Windsurf

Windsurf

  • Agentic developmentnot LangSmith
  • AI-assisted codingnot LangSmith
  • Complex project managementnot LangSmith
  • Automated coding tasksnot LangSmith
  • Learning new codebasesnot LangSmith

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

LangSmith

  • Usage-based pricing applies beyond included traces; LCU charges at $1.50/LCU and LSU at $1.00/LSU
  • Free tier limited to 1 seat and 5,000 traces per month

Windsurf

  • Recently rebranded to Devin Desktop, creating product identity confusion
  • Cascade agent reached end-of-life on July 1, 2026, requiring migration to Devin Local
  • Free tier quota runs out quickly for active developers, within a couple days of coding
  • Pricing increased significantly in March 2026 overhaul, moving from credit-based to daily/weekly quotas
  • OpenAI acquisition raises concerns about long-term product direction diverging from Codeium's vision

Pricing, plan by plan

LangSmith

Free
  • DeveloperFree
    • 1 seat maximum
    • 5,000 base traces monthly
  • Plus$39/month
    • Unlimited seats
    • 10,000 base traces monthly
    • 1 free small serverless deployment
  • Enterprise$null/mo
    • Custom pricing
    • Self-hosted and hybrid options
    • Custom SSO, ABAC, RBAC

Windsurf

Free
  • FreeFree
    • Light daily and weekly quotas
    • Unlimited tab autocomplete
    • Access to Cascade AI agent
  • Pro$20/month
    • Standard quotas
    • Windsurf proprietary SWE model
    • Cloud sessions for background work
  • Max$200/month
    • Heavy daily quotas
    • Long agent sessions
    • Frontier third-party models
  • Teams$40/month-per-user
    • All Pro features
    • Centralized billing
    • Usage analytics

Which should you pick?

Choose LangSmith if

  • You want to start without paying.
LangSmith review

Choose Windsurf if

  • You need cascade ai agent.
  • You want to start without paying.
  • You work on macOS, Linux, Windows.
  • You also want agentic programming.
Windsurf review

Questions people ask

Is LangSmith or Windsurf better?
Neither clearly leads. LangSmith starts at Free and Windsurf at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, LangSmith or Windsurf?
LangSmith starts at Free and Windsurf at Free.
Does LangSmith or Windsurf run on more platforms?
LangSmith runs on Web. Windsurf runs on macOS, Linux, Windows.
Can I use LangSmith for free?
Both have a free tier, so you can try either at no cost before committing.
What is LangSmith best used for?
LangSmith is most often used for tracing agent execution step-by-step in production, detecting agent failures affecting latency and cost, monitoring token usage and latency percentiles, clustering traces to identify failure modes. Of those, tracing agent execution step-by-step in production and detecting agent failures affecting latency and cost are not what Windsurf is typically brought in for.
What can LangSmith do that Windsurf cannot?
Windsurf covers Cascade AI agent, Agentic programming, Context-aware assistance, Automated command execution.

Answered from the vendors’ own pages

LangSmith: What does LangSmith cost?

LangSmith Developer plan is free with up to 5,000 base traces monthly. Plus plan costs $39/month per seat with 10,000 base traces included. Enterprise pricing is custom.

Source
Windsurf: Does Windsurf support MCP (Model Context Protocol) integrations?

Yes. Windsurf supports MCP with integrations for 21 third-party tools for extending functionality and connecting to external systems.

Source
LangSmith: How does LangSmith usage-based pricing work?

Beyond included traces, LangSmith charges $1.50 per LCU (LangChain Compute Unit) for computational work and $1.00 per LSU (LangChain Storage Unit) for data storage.

Source
Windsurf: What is Windsurf's current status as of 2026?

Windsurf rebranded to Devin Desktop in June 2026 and is backed by OpenAI after its 2025 acquisition. Cascade reached end-of-life on July 1, 2026, with Devin Local as the Rust-rewritten successor.

Source
LangSmith: Is there a free tier for LangSmith?

Yes, the Developer plan is free with limits on seat count (1 seat maximum) and trace volume (5,000 base traces per month).

Source
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