Fathom vs Weights & Biases — Which One Wins?
A detailed, side-by-side comparison of Fathom and Weights & Biases to help you pick the right tool for your workflow.
Quick Verdict
Weights & Biases takes the lead with a 4.9 rating and is best for ml teams that need to track, compare, and reproduce experiments. Fathom (4.4) is the better pick if you need businesses wanting the most polished privacy-friendly analytics with premium support..
Side-by-Side Comparison
| Criteria | Fathom | Weights & Biases |
|---|---|---|
| Rating | ★★★★ 4.4(89) | ★★★★★ 4.9(12) |
| Pricing Model | paid | freemium |
| Starter Price | $15/mo (100K pageviews) | $50/user/mo |
| Free Tier | Yes | No |
| Platforms | web | Web |
| Learning Curve | easy | moderate |
| API Available | Yes | Yes |
| Best For | Businesses wanting the most polished privacy-friendly analytics with premium support. | ML teams that need to track, compare, and reproduce experiments |
| Verdict | situational | recommended |
Feature Checklist
| Feature | Fathom | Weights & Biases |
|---|---|---|
| Cookie-free analytics | — | |
| Beautiful single-page dashboard | — | |
| EU data isolation | — | |
| Custom events and goals | — | |
| UTM campaign tracking | — | |
| Multi-domain support | — | |
| Experiment tracking | — | |
| Model evaluation | — | |
| Dataset versioning | — | |
| Collaborative dashboards | — | |
| Hyperparameter sweeps | — | |
| Artifact management | — |
Fathom
Pros
- ✓Most polished privacy-friendly analytics dashboard
- ✓EU data isolation for GDPR compliance
- ✓Accurate visitor counting without cookies
Cons
- ✕More expensive than Plausible for similar features
- ✕No free tier or self-hosting option
- ✕Less capable than GA4 for marketing analytics
Weights & Biases
Pros
- ✓Industry standard
- ✓Excellent visualizations
- ✓Good free tier
- ✓Comprehensive artifacts
Cons
- ✕ML-specific only
- ✕Enterprise pricing steep
- ✕Learning curve for full features
The Bottom Line
Both Fathom and Weights & Biases are solid tools in the Analytics & Data space. Weights & Biases edges ahead with a stronger overall rating (4.9 vs 4.4) and is the better choice for ml teams that need to track, compare, and reproduce experiments. However, if you prioritize businesses wanting the most polished privacy-friendly analytics with premium support., Fathom is worth serious consideration. We recommend trying the free tier or trial of each before committing.