Heap
Weights & Biases
| Feature | Heap | Weights & Biases |
|---|---|---|
| Pricing | Free only | Free / from $50/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.3 / 5 | 4.7 / 5 |
| Best For | product-teams, growth-marketers, ux-researchers, saas-companies | ml-engineers, research-teams, ai-companies, data-scientists |
| Founded | 2013 | 2017 |
| Auto Capture | ✓ | ✗ |
| Session Replay | ✓ | ✗ |
| Funnel Analysis | ✓ | ✗ |
| Retention Analysis | ✓ | ✗ |
| User Segments | ✓ | ✗ |
| Data Science | ✓ | ✗ |
| Integrations | ✓ | ✗ |
| Experiment Tracking | ✗ | ✓ |
| Model Registry | ✗ | ✓ |
| Sweeps | ✗ | ✓ |
| Artifacts | ✗ | ✓ |
| Reports | ✗ | ✓ |
| Launch | ✗ | ✓ |
✓ Heap Pros
- Auto-captures all user interactions without code
- Retroactive analysis (define events after the fact)
- Session replay integrated with analytics
- No engineering resources needed for tracking
✗ Heap Cons
- Pricing not transparent (sales-required for growth+)
- Can generate excessive data requiring cleanup
- UI can feel slower than event-based alternatives
✓ 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
Heap is built for product teams and growth marketers, with a focus on auto-capture and session-replay. Weights & Biases targets ml engineers and research teams and leads with experiment-tracking and model-registry.
Heap uses custom enterprise pricing, while Weights & Biases starts at $50/mo — a tangible advantage for teams with a fixed budget.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
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.
Feature-wise, Heap offers broader built-in capabilities (7 features vs 6), while Weights & Biases takes a more focused approach — which can mean a simpler, faster onboarding experience.
Bottom line: Weights & Biases has a slight overall edge — but if auto-captures all user interactions without code matters most to you, Heap may still be the right call.