Portkey vs Weights & Biases
Which Observability AI tool is better in 2026?
Portkey
The control plane for production AI
Weights & Biases
The AI developer platform
Side-by-side
Weights & Biases is the more established option (raised $245M); pricing is comparable on both sides.
| Metric | Portkey | Weights & Biases |
|---|---|---|
| Taglinei | The control plane for production AI | The AI developer platform |
| Foundedi | 2023 | 2018🏆 |
| HQi | San Francisco, US | San Francisco, US |
| Employeesi | 11-50 | 500-1000🏆 |
| Neuron scorei | 73🏆 | 49 |
| Total fundingi | $18M | $245M🏆 |
| Latest roundi | Seed | Series C · Oct 2023 |
| Valuationi | — | $1B🏆 |
| Cheapest paid plani | Pricing not disclosed | — |
| Free plani | ✓ | ✗ |
| Free triali | ✓ | ✗ |
| Top tier pricei | Pricing not disclosed | Enterprise · Contact sales |
| Pricing summaryi | Free | 1 published plans |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Portkey and Weights & Biases.
| Capability | Portkey | Weights & Biases |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✓ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | 1 (Python) |
| Free plan | ✓ | ✗ |
| Free trial | ✓ | ✗ |
| Verified | ✗ | ✓ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Portkey
- Higher Neuron score (73 vs 49)
- Offers a free plan
- Offers a free trial
- Newer company (2023)
🔵 Strengths of Weights & Biases
- Has raised more capital ($245M vs $18M)
- More mature (2018)
- Verified profile
Which should you choose?
Choose Weights & Biases if price matters most — it starts at Enterprise · Contact sales, which is friendlier for teams watching burn. Both AI Observability tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Weights & Biases if you want the most established option — it has raised $245M, suggesting more runway for enterprise features, support, and long-term roadmap. For mission-critical workflows or larger teams, that stability often outweighs a lower monthly price.
Frequently asked questions
Portkey vs Weights & Biases — which is better?
It depends on your priority. Portkey is the leaner option; Weights & Biases has broader feature depth. See the side-by-side table above.
Is Portkey cheaper than Weights & Biases?
No — Weights & Biases's cheapest paid plan is Enterprise · Contact sales, while Portkey's is Free.
Do Portkey and Weights & Biases offer free plans?
Portkey: Yes, has a free plan. Weights & Biases: Paid only.
Explore more AI Observability tools
Contextual paths to related AI startups, deals and rankings.