LangWatch
LLM observability and evaluation platform to monitor, debug, and optimize AI applications.
What is LangWatch?
LangWatch is an LLM observability, monitoring, and evaluation platform designed to help AI teams manage the entire lifecycle of their AI agents. If you are exploring what is langwatch, it functions as an end-to-end LLMops solution that assists in debugging complex prompt engineering, measuring response quality, and detecting llm hallucination. Positioned as one of the strong langfuse alternatives with prompt optimization and dspy lowcode support, LangWatch provides visibility into prompts, variables, costs, and tool calls. AI teams can utilize langwatch evaluations and explore langflow integrations to maintain quality control over their applications, while using the dspy visualizer to observe prompt optimization steps to make dspy use langwatch highly effective.
Category
Best LangWatch use cases by task, role, industry, and platform
These use cases show where LangWatch fits best, ranked by fit score before popularity or pricing.
LangWatch Pricing Plans
Compare LangWatch free options, LangWatch paid pricing plans, and usage notes before you choose the best way to use this AI tool in 2026.
Free, Launch from €59/mo
Get started with LLM monitoring and evaluation. Includes 1,000 traces/month, 30 days data access, 2 users, and community support.
For small teams optimizing their LLM apps. Includes 20k traces/month, 180 days data access, 3 users (additional users at €19/user), unlimited evaluations, and email/Slack support.
Dedicated support and security controls for larger teams. Includes 20k traces/month, up to 2 years data retention, 5 users (additional users at €10/user), and ISO27001 reports.
Optional add-on for Launch or Accelerate plans. Includes Enterprise SSO, hybrid hosting, custom data retention, audit logs, and dedicated technical support.
Self-hosting, enterprise-grade support, custom traces, custom terms, dedicated support engineer, and optional billing via AWS Marketplace.
Pricing updated:Jun 12, 2026
LangWatch AI Features
LangWatch Pros and Cons
Pros
- Provides visibility into prompts, variables, and tool calls across major AI frameworks
- Seamlessly integrates with DSPy to automate prompt engineering adjustments
- Offers self-hosted and hybrid hosting models to comply with enterprise data standards
- Features human annotation queues to combine expert input with automated workflows
Limitations
- The free Developer tier limits trace retention to 30 days
- Advanced enterprise features like hybrid hosting require a premium add-on