Comet vs LUML Flow
Comet
comet.com
LUML Flow
luml.aiSide by side
| Figure | Comet | LUML Flow |
|---|---|---|
| Price from | $19/mo | — |
| Free plan | Yes | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 11 | 0 |
| Spec score · ML Experiment Tracking Software | 9.4 (#1) | 7.0 (#27) |
| Headquarters | New York City, United States | Linz, Austria |
| Integrations | Comet advertises integrations with more than 40 AI frameworks, model providers, and gateways, including PyTorch, TensorFlow, Keras, scikit-learn, XGBoost, Hugging Face, LangChain, and OpenAI. | The page lists PyTorch, LangGraph, XGBoost, scikit-learn, LlamaIndex, TensorFlow, Anthropic, LightGBM, DSPy, JAX, LangChain, and Keras. |
| LLM tracing | Opik traces LLM inputs, outputs, metadata, tool calls, and multi-step agent execution. | Flow routes OpenTelemetry spans into experiment storage and describes instrumentors for OpenAI clients, LangChain, and LangGraph. |
| Support | The pricing page lists community support for all plans, email support for paid cloud Pro and Enterprise, and dedicated support and SLAs for Enterprise. | The Flow page links to documentation and offers a request-demo link. |
Plans
Comet
- Free CloudFree
- MLOps FreeFree
- Open SourceFree
- Opik Free CloudFree
- Opik Open SourceFree
- MLOps Pro$19 a month
- Opik Pro Cloud$19 a month
- Pro Cloud$19 a month
- EnterprisePriced on request
- MLOps EnterprisePriced on request
In their own words
Comet
Comet offers two product families on one platform: Opik for observing and evaluating LLM applications and agents, and MLOps for machine-learning workflows. Opik traces execution paths such as context retrieval, model responses and tool calls. Its evaluation tools include test suites, datasets, experiments, LLM-as-a-judge and heuristic metrics. The product lists integrations with more than 40 AI frameworks, model providers and gateways, including LangChain, OpenAI, Google ADK, LangGraph and CrewAI; OpenTelemetry support covers tracking applications in Ruby, Java and other languages. MLOps provides experiment tracking, dataset management, a model registry and production monitoring. Opik's open-source version can be self-hosted, and Enterprise offers flexible deployment options. Free Cloud allows up to 10 team members, 25k spans per month and 60-day data retention. Pro Cloud costs $19 a month and allows up to 50 team members and 100k spans monthly, with the same retention period. MLOps Free is also listed, while MLOps Pro costs $19 per user/month. Enterprise pricing is custom. Comet lists community support for all plans, email support for paid cloud Pro and Enterprise, and dedicated support and SLAs for Enterprise.