Langfuse vs LangSmith Comparison
Langfuse
Starting at Free free
- Small Business
- Mid-Market
Langfuse is an open-source LLM engineering platform for tracing, evaluation, prompt management, and metrics. It provides detailed traces of LLM application executions — capturing every LLM call, tool use, retrieval step,…
LangSmith
Starting at Free free
- Small Business
- Mid-Market
LangSmith is the LLMOps observability and evaluation platform built by LangChain for teams developing production LLM applications. It provides tracing, debugging, and evaluation for any LLM application — not just LangCha…
Langfuse leads on user satisfaction with a 4.7-star rating across 185 reviews.
Langfuse vs LangSmith — at a glance
| Feature | Langfuse | LangSmith |
|---|---|---|
| Rating | 4.7 / 5 | 4.5 / 5 |
| Reviews | 185 | 310 |
| Starting price | Free free | Free free |
| Free trial | No | No |
| Free version | No | No |
| Best for | Small Business, Mid-Market, Enterprise | Small Business, Mid-Market, Enterprise |
| Category | MLOps Platforms | MLOps Platforms |
| Platforms | Cloud, On-Premise, Linux | Cloud, On-Premise |
| API | Available | Available |
| Support modes | GitHub Issues, Discord Community, Email Support, Enterprise Support | Discord Community, Help Center, Email Support, Enterprise Support |
Key differences between Langfuse and LangSmith
- Pricing: Langfuse starts at Free free, while LangSmith starts at Free free.
- User satisfaction: Langfuse scores higher with a 4.7-star average.
- Deployment: Langfuse supports Cloud, On-Premise, Linux; LangSmith supports Cloud, On-Premise.
Langfuse vs LangSmith — find the better fit before you commit.
Which tool fits your team best
Which is actually cheaper for your team size
Where each product wins, per real buyers
Most MLOps Platforms tools look identical on paper. This comparison cuts to the differences that matter — pricing structure, team fit, and what real buyers found after signing up.
Biggest differences
Features
Pricing
Buying details
Security
Buyer feedback
Integrations
Product tour
Other options
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Biggest differences
Start here before you go deeper into features.
Small Business, Mid-Market, Enterprise
Small Business, Mid-Market, Enterprise
Langfuse typically suits Small Business and Mid-Market. LangSmith tends to fit Small Business and Mid-Market better. The right choice depends on your team size, workflow, and whether a free trial matters.
Description | Langfuse is an open-source LLM engineering platform for tracing, evaluation, prompt management, and metrics. It provides detailed traces of LLM application executions — capturing every LLM ... Read More about Langfuse | LangSmith is the LLMOps observability and evaluation platform built by LangChain for teams developing production LLM applications. It provides tracing, debugging, and evaluation for any LLM ... Read More about LangSmith |
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Entry Level Pricing |
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Free Trial Availability |
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SpotScoreWhat's this? ↗ | 9.4/10 | 9.0/10 |
User RatingsBased on verified Spotsaas reviews | ||
Get pricing help | Get pricing help |
Where each option fits best
See where each product is strongest, which teams it fits, and what causes buyers to keep looking — before you commit.
Based on buyer reviews and verified product data collected by Spotsaas.
Key strengths
- Data Sovereignty for AI Traces: Self-hosted MIT deployment keeps all LLM traces, prompts, and evaluation data on company infrastructure — critical for regulated industries.
- Free at Scale: 50k free cloud traces plus unlimited self-hosted cover most production AI applications without per-trace cost anxiety.
- Product-Level AI Analytics: Session grouping lets you analyze how users interact with AI features across multi-turn conversations — beyond per-call debugging.
- Debug LLM Failures Fast: Full call traces with inputs, outputs, latency, and token counts for every LLM call — no more guessing why an AI chain failed.
- Prevent Prompt Regressions: Automated evaluation runs on datasets catch quality regressions when prompts change, before they reach users.
- Monitor Production AI Quality: Real-time dashboards track LLM latency, error rates, and output quality — the same visibility layer backend engineers expect for APIs.
Best fit
- European and regulated-industry teams self-hosting LLM observability to maintain data residency compliance
- Early-stage AI startups instrumenting production LLM applications at zero cost with the cloud free tier
- Teams running systematic LLM-as-judge evaluations to catch prompt quality regressions before deployment
- AI engineering teams debugging complex multi-step LLM chains that produce unexpected outputs
- Teams running systematic evaluation of prompt changes before deploying to production
- ML platform teams building shared observability infrastructure for multiple AI product teams
Software Demo
Demo |
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How do Langfuse and LangSmith Compare on Features?
Total Features | 8 Features | 9 Features |
|---|---|---|
Unique Features | No unique features | No unique features |
Get Quote | Get Quote |
Compare Langfuse and LangSmith on pricing
Review starting price, plan structure, and free-trial access side by side so you can see which option fits your budget and buying process.
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Other Details
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Get help choosing | Get help choosing |
Langfuse User Reviews & Rating Comparison
User Ratings | 4.7 (based on 185 reviews) | 4.5 (based on 310 reviews) |
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Rating Distribution | ||
Spotsaas Editor’s POV generated by AI | Buyer sentiment Buyer sentiment is very strong across 185 reviews, with consistently positive feedback. What buyers like
Common complaints
| Buyer sentiment Buyer sentiment is very strong across 310 reviews, with consistently positive feedback. What buyers like
Common complaints
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Pros and Cons |
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Disclaimer: This research has been collated from a variety of authoritative sources. We welcome your feedback at [email protected].
Frequently asked questions
- Which is better, Langfuse or LangSmith?
- Langfuse edges out the other on user ratings (4.7 vs 4.5). That said, the best pick depends on your use case — use the comparison tables above to evaluate each dimension.
- Do Langfuse and LangSmith offer a free trial?
- Neither Langfuse nor LangSmith currently lists a free trial.
- What is the starting price of Langfuse vs LangSmith?
- Langfuse starts at Free free. LangSmith starts at Free free.