Pirsch
Weights & Biases
| Feature | Pirsch | Weights & Biases |
|---|---|---|
| Pricing | From $4/mo | Free / from $50/mo |
| Free Plan | ✗ No | ✓ Yes |
| Rating | 4.3 / 5 | 4.7 / 5 |
| Best For | privacy-focused-websites, european-businesses, bloggers, saas-companies | ml-engineers, research-teams, ai-companies, data-scientists |
| Founded | 2021 | 2017 |
| Pageview Tracking | ✓ | ✗ |
| Event Tracking | ✓ | ✗ |
| Goals | ✓ | ✗ |
| Utm Tracking | ✓ | ✗ |
| Server Side Tracking | ✓ | ✗ |
| Api Access | ✓ | ✗ |
| Experiment Tracking | ✗ | ✓ |
| Model Registry | ✗ | ✓ |
| Sweeps | ✗ | ✓ |
| Artifacts | ✗ | ✓ |
| Reports | ✗ | ✓ |
| Launch | ✗ | ✓ |
✓ Pirsch Pros
- No cookies required
- GDPR compliant out of the box
- Lightweight script (less than 1KB)
- Server-side tracking option
✗ Pirsch Cons
- No free plan
- Less detailed than GA4
- Limited 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
Pirsch is built for privacy focused websites and european businesses, with a focus on pageview-tracking and event-tracking. Weights & Biases targets ml engineers and research teams and leads with experiment-tracking and model-registry.
On pricing, Pirsch is the clear winner for budget-conscious users — starting at $4/mo compared to $50/mo for Weights & Biases. That $46/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. Pirsch requires a paid subscription from day one.
Weights & Biases edges out on user ratings (4.7 vs 4.3). While both are well-regarded, that gap reflects real differences in user satisfaction worth considering.
Bottom line: Weights & Biases has a slight overall edge — but if no cookies required matters most to you, Pirsch may still be the right call.