AI Tool
LangWatch pricing, features, company info, and alternatives
A factual product page for LangWatch as an AI agent testing and LLM evaluation platform.
Last updated April 2026 · Pricing and features verified against official documentation
Pricing
Current public pricing tiers on file for LangWatch, last verified Apr 25, 2026.
Developer
$0 / month
Includes 50,000 events per month, 14 days of data access, 2 users, and 3 scenarios, 3 simulations, and 3 custom evaluations.
Growth
€29 / core-seat/month
Per core-seat pricing. Includes 200,000 events, 30 days of retention, unlimited lite-users, unlimited eval scores, simulations, and prompts, plus chat and email support.
Enterprise / Regulated
Custom pricing
Sales-led plan with hybrid, self-hosted, or on-prem deployment, custom retention, SSO/RBAC, audit logs, SLA support, ISO 27001 reports, DPA, and marketplace billing.
What You Can Do With It
The main capabilities that shape how people use LangWatch today.
Tracks traces, threads, token and cost data, and multi-agent graphs for production AI systems.
Combines prompt management, online and offline evaluations, agent simulations, and dataset workflows in one platform.
Supports OpenTelemetry and SDK-based instrumentation, with REST APIs for traces, prompts, annotations, and related objects.
Offers managed cloud, self-managed, self-hosted, hybrid, and on-prem deployment paths.
Best For
Who LangWatch is most clearly built for.
Teams building agentic AI products that need testing, evaluation, and observability together.
Organizations that want self-hosted or hybrid deployment options for sensitive workloads.
Product and engineering teams collaborating on prompts, datasets, and evaluations across roles.
Company
Leadership and company context for Reasoning Engine B.V..
CEO
Manouk Draisma
Founders
Manouk Draisma, Rogerio Chaves
Investors
Antler, Rabobank Innovation, Passion Capital, Volta Ventures
Headquarters
Amsterdam, Netherlands
Platforms
Where you can use LangWatch today.
Web
API
Self-hosted
Hybrid/on-prem
Integrations
Notable connected tools and ecosystem hooks for LangWatch.
OpenTelemetry
LangChain
DSPy
n8n
Privacy Notes
Publicly stated data-handling notes that matter when evaluating LangWatch.
LangWatch's privacy policy applies to Reasoning Engine B.V. doing business as LangWatch.
The trust center says LangWatch is ISO 27001 compliant and GDPR compliant.
The pricing page says enterprise customers can request DPA terms, ISO 27001 reports, and info-sec or legal review.
Compliance
Public compliance or enterprise-governance signals we found for LangWatch.
ISO 27001
SOC 2
GDPR
Access
How to integrate or build around LangWatch.
Public API
Yes
Docs
Available
Alternatives
Other tools worth considering alongside LangWatch.
Framework-agnostic platform for observability, evaluation, and deployment of AI agents and LLM apps.
Open-source LLM engineering platform for tracing, prompt management, evaluations, and analytics.
AI observability and evaluation platform for tracing, scoring, and improving production AI applications.
Product Snapshot
LangWatch is an AI agent testing and LLM evaluation platform from Reasoning Engine B.V., doing business as LangWatch. It combines observability, prompt management, simulations, evaluations, and guardrails for teams shipping AI applications.
What You Can Do With It
- Track traces, threads, token usage, cost data, and multi-agent graphs in production.
- Build and run online and offline evaluations, agent simulations, and prompt experiments.
- Manage prompts, datasets, annotations, and replay workflows in one platform.
- Instrument applications through SDKs, OpenTelemetry, and a public REST API.
Why It Stands Out
It brings observability, evaluation, prompt management, and simulation into one workflow, with cloud, self-managed, self-hosted, hybrid, and on-prem deployment options.
Tradeoffs To Know
- Pricing is seat-and-event based, so usage growth changes the bill along more than one axis.
- The enterprise and regulated plan is sales-led rather than self-serve.
- The platform is built for AI engineering workflows, so it is broader than a simple tracing tool.
Sources
- langwatch.ai/pricing
- langwatch.ai/blog/new-pricing-ai-growth-shouldn%E2%80%99t-increase-your-bill
- langwatch.ai/legal/terms-conditions
- langwatch.ai/legal/privacy-policy
- langwatch.ai
- langwatch.ai/blog/new-dutch-startup-langwatch-brings-much-needed-quality-control-to-genai
- langwatch.ai/about-us
- langwatch.ai/blog/langwatch-ai-announcing-1m-funding-round-to-bring-the-power-of-evaluations-to-ai-teams
- langwatch.ai/docs
- docs.langwatch.ai/integration/overview
- langwatch.ai/blog/introducing-scenario-use-an-agent-to-test-your-agent
- docs.langwatch.ai/self-hosting/overview
- langwatch.ai/trust-center
- docs.langwatch.ai/integration/rest-api
- docs.langwatch.ai/api-reference/prompts/overview