LangSmith vs Promptfoo: Which DevOps Tools Is Better in 2026?
Compare pricing, features, integrations, verified reviews, AI capabilities, security, and customer satisfaction, side by side, with no marketing spin.
The Short Answer
LangSmith vs Promptfoo, in 15 seconds
Choose LangSmith if…
- You prefer LangSmith's approach and ecosystem
Choose Promptfoo if…
- You prefer Promptfoo's approach and ecosystem
Head-to-Head Scorecard
How LangSmith and Promptfoo score
It's evenly matched, each leads on 0 of 9 measured dimensions.
- Even
Customer Rating
Average score from verified user reviews
LangSmithNo reviewsPromptfooNo reviews - Even
Review Volume
Number of verified reviews, a proxy for adoption
LangSmith0Promptfoo0 - Even
Entry Pricing
Lowest published starting price (free plan = lowest)
LangSmithCustomPromptfooCustom - Even
Free Access
Availability of a free plan and/or free trial
LangSmithFree trialPromptfooFree trial - Even
Integrations
Number of listed third-party integrations
LangSmith6Promptfoo6 - Even
Features
Number of listed product capabilities
LangSmith0Promptfoo0 - Even
AI Features
Capabilities mentioning AI, automation or ML
LangSmith,Promptfoo, - Even
Security & Compliance
Number of listed compliance certifications
LangSmith2Promptfoo2 - Even
Platforms & Deployment
Supported platforms and deployment options
LangSmith4Promptfoo4
Feature Comparison
LangSmith vs Promptfoo feature breakdown
Search or filter the full feature matrix, core features, AI, integrations, APIs, security and compliance.
LangSmith
PromptfooPricing Comparison
LangSmith vs Promptfoo pricing
Entry pricing, plan tiers and the cost factors that shape total cost of ownership.
LangSmith
Custom to start- Standard support
- agent and LLM tracing
- evaluation datasets and experiments
- Integrations
- Everything in Professional
- prompt hub and playground
- Dedicated support and onboarding
- agent deployment
Promptfoo
Custom to start- Analytics and reporting
- prompt and model comparison tests
- Standard support
- automated red teaming
- Everything in Professional
- CI/CD integration
- security vulnerability scanning
- Advanced security and controls
Total cost of ownership factors
Beyond list price, factor in implementation, training, add-ons and per-seat scaling when estimating total cost of ownership.
Pros & Cons
LangSmith vs Promptfoo: strengths and trade-offs
LangSmith
Pros
- Free trial offered
- Compliance: SOC 2, GDPR
- Public API available
Cons
- No free plan
- Pricing is quote-based (less transparent)
Promptfoo
Pros
- Free trial offered
- Compliance: SOC 2, GDPR
- Public API available
Cons
- No free plan
- Pricing is quote-based (less transparent)
Buyer Fit
Who should use LangSmith vs Promptfoo?
Startups
Either
Either keeps early-stage costs lowest with its entry tier.
Small businesses
Either
Either offers the most accessible pricing for lean teams.
Agencies
Either
Either connects to more tools for multi-client workflows.
Enterprises
Either
Either leads on compliance and breadth for complex needs.
Ecommerce
Either
Either integrates with more of the commerce stack.
SaaS companies
Either
Either is the more developer- and automation-friendly choice.
Integration overlap
Shared integrations (3)
Only in LangSmith (3)
Only in Promptfoo (3)
Keep Exploring
Other alternatives worth considering
Similar devops tools products buyers compare alongside LangSmith and Promptfoo.
Ask SIA which solution fits your business
SIA, Saaskart's AI buying assistant, weighs LangSmith and Promptfoo against your team size, budget, integrations and compliance needs, then recommends the right fit and the questions to ask each vendor.
Get a personalised recommendationLangSmith vs Promptfoo, Frequently Asked Questions
What is the difference between LangSmith and Promptfoo?
LangSmith and Promptfoo are both DevOps Tools solutions. LangSmith is rated 0.0/5 by 0 users, while Promptfoo is rated 0.0/5 by 0 users. The main differences lie in pricing, features, and target audience.
Which is better, LangSmith or Promptfoo?
Based on user ratings, LangSmith scores higher at 0.0/5. The best choice depends on your team size, budget, and specific requirements.
Which is cheaper, LangSmith or Promptfoo?
Both products have custom pricing. We recommend contacting both vendors for a quote tailored to your team size.
Does LangSmith or Promptfoo have a free plan?
Neither LangSmith nor Promptfoo currently offers a free plan, but LangSmith provides a free trial.
Can I switch from LangSmith to Promptfoo?
Switching between LangSmith and Promptfoo is possible. Both support data export. Check integration compatibility and plan for data migration to minimise disruption to your team.
Who should use LangSmith vs Promptfoo?
LangSmith is best suited for teams that prioritise enterprise features. Promptfoo works well for teams needing advanced capabilities.
Our Verdict
The bottom line on LangSmith vs Promptfoo
Best Overall
Either
It's a tie balances user satisfaction and proven adoption.
Best for Startups
Either
It's a tie has the friendliest entry point for new teams.
Best for Enterprise
Either
It's a tie leads on compliance and feature breadth.
Best Value
Either
It's a tie delivers the lowest cost to get started.
Best AI Features
Either
Comparable AI capabilities on both sides.
Highest Rated
Either
Both earn equal user ratings.