LangWatch
LangWatch: Affordable visibility for agents, RAG pipelines, evaluations, and LLM costs. Ranked #7 of 26 in LLM Observability Tools by our editors (8.8/10); pricing: Free plan; best for teams needing affordable agent and RAG visibility.
At a glance
- Editor score8.8 / 10
- PricingFree plan
- Best forTeams needing affordable agent and RAG visibility
- Free planYes
- Paid from€29/seat/mo
- LLM tracingYes
- Facts checked20 Sep 2026
Where it wins
- Nested agent tracing with execution graphs and cost tracking
- Evaluations, guardrails, simulations, and prompt versioning in one platform
- Broad SDK, framework, OpenTelemetry, and self-hosted deployment support
Where it doesn't
- Developer includes 50k events monthly and 14-day data access
- Enterprise capabilities require a custom plan
- The feature set may exceed the needs of teams wanting basic tracing only
Our verdict on LangWatch
LangWatch is an LLM engineering and observability platform for teams building AI agents and applications. It records LLM and agent traces with nested spans and execution graphs, tracks tokens, model costs, and latency, and captures RAG spans and retrieved context. Its audience is teams developing, evaluating, and operating AI systems in production, particularly those that need visibility across agents, retrieval workflows, prompts, and evaluations.
The freemium pricing structure gives teams a low-cost entry point. The Developer plan costs €0 per month and includes 50k events per month, 14-day data access, 2 users, 3 scenarios, 3 simulations, and 3 custom evaluations. Growth costs €29 per core-seat per month, includes 200k events, and adds unlimited lite-users, simulations, evaluations, and prompts, along with private Slack or Teams support. Volume discounts apply above 20 users. Enterprise adds hybrid, self-hosted, or on-prem deployment, custom data retention, SSO and RBAC, audit logs, SLAs, ISO 27001 reports and security review, and a dedicated support plan.
LangWatch fits teams that want one workspace for observability, testing, and prompt operations. It supports Python, TypeScript, and Go SDKs, OpenTelemetry, REST API ingestion, and frameworks including OpenAI Agents, LangGraph, LangChain, CrewAI, Pydantic AI, Mastra, DSPy, LlamaIndex, Haystack, Google ADK, and Amazon Bedrock. Offline experiments, online evaluations, guardrails, prompt rollback, deployment tags, playground testing, topic clustering, trace search, and custom analytics broaden its coverage. Teams needing only basic trace collection may prefer a narrower tool, while teams building agentic or RAG systems should find the combined coverage more suitable.
Your product? Our editors can test LangWatch in depth and publish a review, labelled as paid · from $149/mo →
LangWatch pricing
All 3 LangWatch plans and prices →
LangWatch fact sheet
| Free plan | Yes |
|---|---|
| Paid from | €29/seat/mo |
| LLM tracing | Yes |
| LLM evaluations | Yes |
| Prompt management | Yes |
| Agent tracing | Yes |
| Retrieval tracing | Yes |
| Token cost tracking | Yes |
| Deployment options | Both |
| Deployment | Cloud, Self-hosted |
| Platforms | Web, Linux |
| Compliance & security | SOC 2, ISO 27001, GDPR, 2FA |
| Support | Community, Live chat, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 26+ integrations: Python SDK, TypeScript SDK, Go SDK, OpenTelemetry, OpenAI Agents, LangGraph … See all → |
| Pricing | Free plan (source) |
| Website | langwatch.ai |
| Facts checked | 20 Sep 2026 |
LangWatch integrations
LangWatch lists 26+ integrations on its own site — the 20 named here are the ones its pages call out.
- Python SDK
- TypeScript SDK
- Go SDK
- OpenTelemetry
- OpenAI Agents
- LangGraph
- LangChain
- CrewAI
- Pydantic AI
- Mastra
- DSPy
- LlamaIndex
- Haystack
- Google ADK
- Amazon Bedrock
- Azure OpenAI
- Vertex AI
- OpenAI
- Anthropic
- Google Cloud
See all LangWatch integrations →
Alternatives to LangWatch
- Arize AXBroad LLM observability with tracing, evaluations, prompts, agents, RAG, and cost tracking.9.4
- LangfuseA broad observability platform with open-source deployment and accessible paid tiers.9.3
- Arize PhoenixA free platform for tracing, evaluating, and improving LLM applications.9.2
See all LangWatch alternatives →
LangWatch vs the competition
- LangWatch vs Arize AX
- LangWatch vs Langfuse
- LangWatch vs Arize Phoenix
- LangWatch vs Opik
- LangWatch vs W&B Weave
- LangWatch vs LangSmith
Compare LangWatch with any tool side by side →
Also Ranked In
LangWatch is ranked in 7 of our directories.
Used LangWatch? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used LangWatch for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
LangWatch is listed in our LLM Observability Tools directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/langwatch/"><img src="https://www.itechguides.com/best/badge/langwatch.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update