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LangWatch vs Onyx

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

LangWatch compared with Onyx
DetailLangWatchOnyx
What it doesAI agent testing and evaluation that turns unpredictable agents into reliable production systems Open source enterprise search and AI assistant platform
StageGrowing Growing
FoundedNot given Not given
Based inNL Not given
Pricing modelfreemium freemium
PricingFree Developer plan forever with 50k events/month. Growth plan at €29/core-seat/month with 200k included events, then €5 per 100k additional events. Storage €3/GB beyond 30-day included retention. Enterprise with custom pricing. Free open-source self-hosting available. Managed cloud Business plan: $20/user/month (annual) or $25/user/month (monthly). Enterprise plan with custom pricing, on-premise deployments, OIDC/SAML SSO, white-labeling, and dedicated support.
Key features
  • Agent simulations with simulated users
  • Red teaming and adversarial testing
  • LLM-based evaluation and scoring
  • Full production observability and tracing
  • Prompt versioning and A/B testing
  • Voice agent simulation and testing
  • Multi-modal evaluation
  • OpenTelemetry native instrumentation
  • Claude Code usage tracking
  • Enterprise SSO and RBAC
  • Chat and search UI
  • Access to all major LLMs
  • Custom AI agents
  • MCP and OpenAPI actions
  • 40+ app connectors
  • Web search and deep research
  • Code interpreter
  • Slack integration
  • Developer APIs
  • Permission-aware connectors
What makes it different
  • Works framework-agnostically with any agent framework without rewrite
  • Simulations with real user behavior from scenario descriptions
  • Fully automated testing from PM goals to pull requests with Langy
  • Self-hosted, hybrid, or cloud deployment with full control
  • Production traces queryable at search speed with AI search
  • Searches all sources in parallel for faster answers
  • Self-hosted with data never leaving customer infrastructure
  • Permission-aware from day one with real-time sync
  • Supports any LLM provider with one-click switching
  • State-of-the-art search outperforming industry leaders
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)53 no change since last check62 no change since last check
Trust Flow (Majestic)2529
Citation Flow (Majestic)4550
Referring domains (Majestic)8521686

6 details filled in for both companies.

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