Build reliable AI agents with
Build better AI agents with
Build reliable AI agents with
The #1 AI engineering platform
to test your AI agents pre- and in production
The #1 AI engineering platform
to test your AI agents
pre- and in production
Traces
Evaluations
Agent Simulations
Prompts
Datasets
Analytics
Collaboration
Traces
Evaluations
Agent Simulations
Prompts
Datasets
Analytics
Collaboration
Traces
Evaluations
Agent Simulations
Prompts
Datasets
Analytics
Collaboration
Join 1000's of AI developers using LangWatch to ship complex AI reliably
Join 1000's of AI developers using LangWatch to ship complex AI reliably
Join 1000's of AI developers using LangWatch to ship complex AI reliably
400k+
400k+
400k+
Monthly installs
500k+
500k+
500k+
Daily evaluations to prevent hallucinations
Saved on Quality
control per week
4k+
4k+
4k+
Github stars
Prototype, evaluate and monitor AI features
Prototype, evaluate and monitor AI features
1
Build
2
Evaluate
3
Deploy
4
Monitor
5
Optimize
Ship Reliable AI
There’s a better way to ship reliable AI
There’s a better way to ship reliable AI
The strongest AI teams don’t rely on guesswork or one-off prompt tweaks. They move faster and with more confidence by building a continuous quality loop around their AI systems.
LangWatch gives your entire team engineers and domain experts alike a single platform to define evaluations, run experiments, test and simulate AI agents, and monitor production behavior.
By closing the loop between development, testing, and real-world usage, LangWatch helps teams ship AI systems with confidence and improve them with every release.
The strongest AI teams don’t rely on guesswork or one-off prompt tweaks. They move faster and with more confidence by building a continuous quality loop around their AI systems.
LangWatch gives your entire team engineers and domain experts alike a single platform to define evaluations, run experiments, test and simulate AI agents, and monitor production behavior.
By closing the loop between development, testing, and real-world usage, LangWatch helps teams ship AI systems with confidence and improve them with every release.
Build
Essential tools to develop agents faster and safer without slowing teams down
Essential tools to develop agents faster and safer without slowing teams down
Prompt & Model Management
Version, compare, and deploy prompt and model changes with full traceability. Roll out experiments safely using feature-flag–style controls, with clear audit trails for every change.
Evaluations
Create and tune custom evals that measure quality specific to your product
LLM Observability
Instantly search and inspect any LLM interaction across environments. Debug failures, investigate incidents, and support audits with complete visibility from development through production.
Test
Clearly measure the impact of every update. Foster a culture of continuous experimentation
Clearly measure the impact of every update. Foster a culture of continuous experimentation
Agent Simulations for complex agentic AI
Run thousands of synthetic conversations across scenarios, languages, and edge cases
Batch Tests & Experiments
Run tests directly from the LangWatch platform or your code. Track the impact of every change across prompts and agent pipelines.
Auto-Evals
Automatically execute your full test suite with LangWatch, covering both pre-release testing and production monitoring.
Optimize
Build a continuous feedback loop that helps you ship AI products users genuinely trust and enjoy.
Human-in-the-loop
Combine evaluations with domain experts and real user feedback to surface issues early and extract clear, actionable insights from live production data.
Data review & labeling
Collaborative workflows for teams to inspect, annotate, and analyze data together—spotting patterns and sharing learnings across engineering, product, and business stakeholders.
Dataset management
Convert production traces into reusable test cases, golden datasets, and benchmarks to power experiments, regressions, and fine-tuning.
Performance optimization with DSPy
Systematically improve prompts, models, and pipelines using structured experimentation and optimization techniques
Seamless integration in your techstack
Works with any LLM app, agent framework, or model
Works with any LLM app, agent framework, or model
OpenTelemetry native, integrates with all models & AI agent frameworks
Evaluations and Agent Simulations running on your existing testing infra
Fully open-source; run locally or self-host
No data lock-in, export any data you need and interop with the rest of your stack
python
Typescript
uv add langwatch
python
Typescript
uv add langwatch
python
Typescript
uv add langwatch
Collaborate to control reliable AI
Iterate, evaluate, monitor collaboratively
Iterate, evaluate, monitor collaboratively
The systhemetic way of testing that turns experiments into reliable AI
The systhemetic way of testing that turns experiments into reliable AI
Engineer
Access everything in just a few lines of code. Everything in LangWatch works with or without your code. Engineers are able to run prompts, flows, and evaluations programmatically, while non-technical users can use the UI.
Data Scientist
Product Manager
Domain Experts
Engineer
Access everything in just a few lines of code. Everything in LangWatch works with or without your code. Engineers are able to run prompts, flows, and evaluations programmatically, while non-technical users can use the UI.
Data Scientist
Product Manager
Domain Experts
Engineer
Data Scientist
Product Manager
Domain Experts
Empower non-technical team members to contribute to AI quality. Let them easily build evaluations and annotate model outputs, bringing them into the quality testing loop.
Amit Huli
Head of AI - Roojoom
“When I saw LangWatch for the first time, it reminded me of how we used to evaluate models in classic machine learning. I knew this was exactly what we needed to maintain our high standards at enterprise scale"
Amit Huli
David Nicol
CTO - Productive Healthy Work Lives
Having evaluated numerous platforms, LangWatch was the only one that meaningfully resolved our quality gaps. The difference has been substantial
David Nicol
Lane Cunmmingham
VP engineering - GetGenetica - Flora AI
“LangWatch has brought us our monitoring and evaluations with an intuitive analytics dashboard. The Optimization Studio with DSPy brings the kind of progress we were hoping for as a partner."
Lane Cunmmingham
Kjeld O
AI Architect, Entropical AI agency
"I’ve seen a lot of LLMops tools and LangWatch is solving a problem that everyone building with AI will have when going to production. The best part is their product is so easy to use."
Kjeld O
Amit Huli
Head of AI - Roojoom
“When I saw LangWatch for the first time, it reminded me of how we used to evaluate models in classic machine learning. I knew this was exactly what we needed to maintain our high standards at enterprise scale"
Amit Huli
David Nicol
CTO - Productive Healthy Work Lives
Having evaluated numerous platforms, LangWatch was the only one that meaningfully resolved our quality gaps. The difference has been substantial
David Nicol
Lane Cunmmingham
VP engineering - GetGenetica - Flora AI
“LangWatch has brought us our monitoring and evaluations with an intuitive analytics dashboard. The Optimization Studio with DSPy brings the kind of progress we were hoping for as a partner."
Lane Cunmmingham
Kjeld O
AI Architect, Entropical AI agency
"I’ve seen a lot of LLMops tools and LangWatch is solving a problem that everyone building with AI will have when going to production. The best part is their product is so easy to use."
Kjeld O
Amit Huli
Head of AI - Roojoom
“When I saw LangWatch for the first time, it reminded me of how we used to evaluate models in classic machine learning. I knew this was exactly what we needed to maintain our high standards at enterprise scale"
Amit Huli
David Nicol
CTO - Productive Healthy Work Lives
Having evaluated numerous platforms, LangWatch was the only one that meaningfully resolved our quality gaps. The difference has been substantial
David Nicol
Lane Cunmmingham
VP engineering - GetGenetica - Flora AI
“LangWatch has brought us our monitoring and evaluations with an intuitive analytics dashboard. The Optimization Studio with DSPy brings the kind of progress we were hoping for as a partner."
Lane Cunmmingham
Kjeld O
AI Architect, Entropical AI agency
"I’ve seen a lot of LLMops tools and LangWatch is solving a problem that everyone building with AI will have when going to production. The best part is their product is so easy to use."
Kjeld O
Amit Huli
Head of AI - Roojoom
“When I saw LangWatch for the first time, it reminded me of how we used to evaluate models in classic machine learning. I knew this was exactly what we needed to maintain our high standards at enterprise scale"
Amit Huli
David Nicol
CTO - Productive Healthy Work Lives
Having evaluated numerous platforms, LangWatch was the only one that meaningfully resolved our quality gaps. The difference has been substantial
David Nicol
Lane Cunmmingham
VP engineering - GetGenetica - Flora AI
“LangWatch has brought us our monitoring and evaluations with an intuitive analytics dashboard. The Optimization Studio with DSPy brings the kind of progress we were hoping for as a partner."
Lane Cunmmingham
Kjeld O
AI Architect, Entropical AI agency
"I’ve seen a lot of LLMops tools and LangWatch is solving a problem that everyone building with AI will have when going to production. The best part is their product is so easy to use."
Kjeld O
Amit Huli
Head of AI - Roojoom
“When I saw LangWatch for the first time, it reminded me of how we used to evaluate models in classic machine learning. I knew this was exactly what we needed to maintain our high standards at enterprise scale"
Amit Huli
David Nicol
CTO - Productive Healthy Work Lives
Having evaluated numerous platforms, LangWatch was the only one that meaningfully resolved our quality gaps. The difference has been substantial
David Nicol
Lane Cunmmingham
VP engineering - GetGenetica - Flora AI
“LangWatch has brought us our monitoring and evaluations with an intuitive analytics dashboard. The Optimization Studio with DSPy brings the kind of progress we were hoping for as a partner."
Lane Cunmmingham
Kjeld O
AI Architect, Entropical AI agency
"I’ve seen a lot of LLMops tools and LangWatch is solving a problem that everyone building with AI will have when going to production. The best part is their product is so easy to use."
Kjeld O
Amit Huli
Head of AI - Roojoom
“When I saw LangWatch for the first time, it reminded me of how we used to evaluate models in classic machine learning. I knew this was exactly what we needed to maintain our high standards at enterprise scale"
Amit Huli
David Nicol
CTO - Productive Healthy Work Lives
Having evaluated numerous platforms, LangWatch was the only one that meaningfully resolved our quality gaps. The difference has been substantial
David Nicol
Lane Cunmmingham
VP engineering - GetGenetica - Flora AI
“LangWatch has brought us our monitoring and evaluations with an intuitive analytics dashboard. The Optimization Studio with DSPy brings the kind of progress we were hoping for as a partner."
Lane Cunmmingham
Kjeld O
AI Architect, Entropical AI agency
"I’ve seen a lot of LLMops tools and LangWatch is solving a problem that everyone building with AI will have when going to production. The best part is their product is so easy to use."
Kjeld O
Amit Huli
Head of AI - Roojoom
“When I saw LangWatch for the first time, it reminded me of how we used to evaluate models in classic machine learning. I knew this was exactly what we needed to maintain our high standards at enterprise scale"
Amit Huli
David Nicol
CTO - Productive Healthy Work Lives
Having evaluated numerous platforms, LangWatch was the only one that meaningfully resolved our quality gaps. The difference has been substantial
David Nicol
Lane Cunmmingham
VP engineering - GetGenetica - Flora AI
“LangWatch has brought us our monitoring and evaluations with an intuitive analytics dashboard. The Optimization Studio with DSPy brings the kind of progress we were hoping for as a partner."
Lane Cunmmingham
Kjeld O
AI Architect, Entropical AI agency
"I’ve seen a lot of LLMops tools and LangWatch is solving a problem that everyone building with AI will have when going to production. The best part is their product is so easy to use."
Kjeld O
Amit Huli
Head of AI - Roojoom
“When I saw LangWatch for the first time, it reminded me of how we used to evaluate models in classic machine learning. I knew this was exactly what we needed to maintain our high standards at enterprise scale"
Amit Huli
David Nicol
CTO - Productive Healthy Work Lives
Having evaluated numerous platforms, LangWatch was the only one that meaningfully resolved our quality gaps. The difference has been substantial
David Nicol
Lane Cunmmingham
VP engineering - GetGenetica - Flora AI
“LangWatch has brought us our monitoring and evaluations with an intuitive analytics dashboard. The Optimization Studio with DSPy brings the kind of progress we were hoping for as a partner."
Lane Cunmmingham
Kjeld O
AI Architect, Entropical AI agency
"I’ve seen a lot of LLMops tools and LangWatch is solving a problem that everyone building with AI will have when going to production. The best part is their product is so easy to use."
Kjeld O
Amit Huli
Head of AI - Roojoom
“When I saw LangWatch for the first time, it reminded me of how we used to evaluate models in classic machine learning. I knew this was exactly what we needed to maintain our high standards at enterprise scale"
Amit Huli
David Nicol
CTO - Productive Healthy Work Lives
Having evaluated numerous platforms, LangWatch was the only one that meaningfully resolved our quality gaps. The difference has been substantial
David Nicol
Lane Cunmmingham
VP engineering - GetGenetica - Flora AI
“LangWatch has brought us our monitoring and evaluations with an intuitive analytics dashboard. The Optimization Studio with DSPy brings the kind of progress we were hoping for as a partner."
Lane Cunmmingham
Kjeld O
AI Architect, Entropical AI agency
"I’ve seen a lot of LLMops tools and LangWatch is solving a problem that everyone building with AI will have when going to production. The best part is their product is so easy to use."
Kjeld O
Amit Huli
Head of AI - Roojoom
“When I saw LangWatch for the first time, it reminded me of how we used to evaluate models in classic machine learning. I knew this was exactly what we needed to maintain our high standards at enterprise scale"
Amit Huli
David Nicol
CTO - Productive Healthy Work Lives
Having evaluated numerous platforms, LangWatch was the only one that meaningfully resolved our quality gaps. The difference has been substantial
David Nicol
Lane Cunmmingham
VP engineering - GetGenetica - Flora AI
“LangWatch has brought us our monitoring and evaluations with an intuitive analytics dashboard. The Optimization Studio with DSPy brings the kind of progress we were hoping for as a partner."
Lane Cunmmingham
Kjeld O
AI Architect, Entropical AI agency
"I’ve seen a lot of LLMops tools and LangWatch is solving a problem that everyone building with AI will have when going to production. The best part is their product is so easy to use."
Kjeld O
Amit Huli
Head of AI - Roojoom
“When I saw LangWatch for the first time, it reminded me of how we used to evaluate models in classic machine learning. I knew this was exactly what we needed to maintain our high standards at enterprise scale"
Amit Huli
David Nicol
CTO - Productive Healthy Work Lives
Having evaluated numerous platforms, LangWatch was the only one that meaningfully resolved our quality gaps. The difference has been substantial
David Nicol
Lane Cunmmingham
VP engineering - GetGenetica - Flora AI
“LangWatch has brought us our monitoring and evaluations with an intuitive analytics dashboard. The Optimization Studio with DSPy brings the kind of progress we were hoping for as a partner."
Lane Cunmmingham
Kjeld O
AI Architect, Entropical AI agency
"I’ve seen a lot of LLMops tools and LangWatch is solving a problem that everyone building with AI will have when going to production. The best part is their product is so easy to use."
Kjeld O
Amit Huli
Head of AI - Roojoom
“When I saw LangWatch for the first time, it reminded me of how we used to evaluate models in classic machine learning. I knew this was exactly what we needed to maintain our high standards at enterprise scale"
Amit Huli
David Nicol
CTO - Productive Healthy Work Lives
Having evaluated numerous platforms, LangWatch was the only one that meaningfully resolved our quality gaps. The difference has been substantial
David Nicol
Lane Cunmmingham
VP engineering - GetGenetica - Flora AI
“LangWatch has brought us our monitoring and evaluations with an intuitive analytics dashboard. The Optimization Studio with DSPy brings the kind of progress we were hoping for as a partner."
Lane Cunmmingham
Kjeld O
AI Architect, Entropical AI agency
"I’ve seen a lot of LLMops tools and LangWatch is solving a problem that everyone building with AI will have when going to production. The best part is their product is so easy to use."
Kjeld O
Enterprise-grade controls:
Your data, your rules
Enterprise-grade controls:
Your data, your rules
On-prem, VPC, air-gapped or hybrid
ISO27001, SOC2 certified. GDPR controlled
Role-based
access controls
Use custom models
& integrate via API
FAQ
Frequently Asked Questions
Frequently Asked Questions
How does LangWatch work?
How does LangWatch work?
How does LangWatch work?
What is LLM observability?
What is LLM observability?
What is LLM observability?
What are LLM evaluations?
What are LLM evaluations?
What are LLM evaluations?
Is LangWatch self-hosted available?
Is LangWatch self-hosted available?
Is LangWatch self-hosted available?
How does LangWatch compare to Langfuse or LangSmith?
How does LangWatch compare to Langfuse or LangSmith?
How does LangWatch compare to Langfuse or LangSmith?
What models and frameworks does LangWatch support and how do I integrate?
What models and frameworks does LangWatch support and how do I integrate?
What models and frameworks does LangWatch support and how do I integrate?
Can I try LangWatch for free?
Can I try LangWatch for free?
Can I try LangWatch for free?
How does LangWatch handle security and compliance?
How does LangWatch handle security and compliance?
How does LangWatch handle security and compliance?
How can I contribute to the project?
How can I contribute to the project?
How can I contribute to the project?
Ship agents with confidence, not crossed fingers
Get up and running with LangWatch in as little as 5 minutes.
Ship agents with confidence, not crossed fingers
Get up and running with LangWatch in as little as 5 minutes.
Ship agents with confidence, not crossed fingers
Get up and running with LangWatch in as little as 5 minutes.
Resources
Integrations
Resources
Integrations
Resources
Integrations