kitio.aiWeights & Biases vs MLflow
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. MLflow is completely free, while Weights & Biases is freemium.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Experiment tracking
- Hyperparameter sweeps
- Model registry
- Weave LLM tracing
- Reports
- Experiment tracking
- Model registry
- GenAI tracing
- LLM evaluation
- Framework autologging
| Feature | Weights & Biases | MLflow |
|---|---|---|
| Best for | Experiment tracking and LLM observability, now part of CoreWeave | Open-source platform for ML experiments, models and GenAI tracing |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Free |
| Starting price | $60/mo | Free |
| Free plan | Yes | Yes, fully free |
| Made by | CoreWeave | Databricks |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
|
Both offer: Experiment tracking, Model registry.
Pricing compared
MLflow is completely free, while Weights & Biases is freemium.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- Experiment tracking for individuals
- Limited storage
Pro
$60/mo
- Starting price
- Team collaboration features
- Higher usage limits
Enterprise
Contact sales
- SSO and advanced security
- Dedicated support
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Weights & Biases
- Industry-standard experiment tracking
- Polished dashboards
- Covers training and LLM apps
- Pricing jumps for larger teams
- Weave ingestion billed by size
- Sign-in moved to CoreWeave
MLflow
- Free and widely adopted
- Covers classic ML and GenAI
- Managed options on many clouds
- Self-hosting needs setup
- UI less polished than SaaS tools
- GenAI features still maturing
Which one should you choose?
Choose Weights & Biases if you want:
- Industry-standard experiment tracking
- Polished dashboards
- Covers training and LLM apps
Watch out: pricing jumps for larger teams.
Choose MLflow if you want:
- Free and widely adopted
- Covers classic ML and GenAI
- Managed options on many clouds
Watch out: self-hosting needs setup.
Weights & Biases vs MLflow FAQ
What is the difference between Weights & Biases and MLflow?
Weights & Biases: Experiment tracking and LLM observability, now part of CoreWeave. MLflow: Open-source platform for ML experiments, models and GenAI tracing. Both are models & apis tools.
Is Weights & Biases or MLflow cheaper?
MLflow is completely free, while Weights & Biases is freemium.
Do Weights & Biases and MLflow have free plans?
Weights & Biases: Yes. MLflow: Yes, fully free.
Who makes Weights & Biases?
Weights & Biases is made by CoreWeave, based in United States.
Who makes MLflow?
MLflow is made by Databricks, based in United States.
Which should I choose, Weights & Biases or MLflow?
Choose Weights & Biases if you value industry-standard experiment tracking and polished dashboards. Choose MLflow if you value free and widely adopted and covers classic ml and genai.