Fathom Analytics
Weights & Biases
| Feature | Fathom Analytics | Weights & Biases |
|---|---|---|
| Pricing | From $14/mo | Free / from $50/mo |
| Free Plan | ✗ No | ✓ Yes |
| Rating | 4.6 / 5 | 4.7 / 5 |
| Best For | privacy-conscious-businesses, bloggers, saas-companies, agencies | ml-engineers, research-teams, ai-companies, data-scientists |
| Founded | 2018 | 2017 |
| Privacy First Analytics | ✓ | ✗ |
| Event Tracking | ✓ | ✗ |
| Email Reports | ✓ | ✗ |
| Custom Domains | ✓ | ✗ |
| Api | ✓ | ✗ |
| Uptime Monitoring | ✓ | ✗ |
| Experiment Tracking | ✗ | ✓ |
| Model Registry | ✗ | ✓ |
| Sweeps | ✗ | ✓ |
| Artifacts | ✗ | ✓ |
| Reports | ✗ | ✓ |
| Launch | ✗ | ✓ |
✓ Fathom Analytics Pros
- No cookie banners needed
- Beautiful simple dashboard
- Fast loading (single script)
- EU-isolation for European data
✗ Fathom Analytics Cons
- No free plan
- Limited segmentation compared to GA4
- No e-commerce tracking
✓ Weights & Biases Pros
- Best-in-class experiment tracking
- Beautiful visualizations
- Great collaboration features
- Generous free tier
✗ Weights & Biases Cons
- Learning curve for full platform
- Can be expensive for large teams
- Requires integration work
The Verdict
Fathom Analytics is built for privacy conscious businesses and bloggers, with a focus on privacy-first-analytics and event-tracking. Weights & Biases targets ml engineers and research teams and leads with experiment-tracking and model-registry.
On pricing, Fathom Analytics is the clear winner for budget-conscious users — starting at $14/mo compared to $50/mo for Weights & Biases. That $36/mo difference adds up quickly for growing teams.
Weights & Biases has a free plan, which gives it a meaningful edge for individuals and small teams exploring their options. Fathom Analytics requires a paid subscription from day one.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.