Portkey vs TensorZero
Which Observability AI tool is better in 2026?
Portkey
The control plane for production AI
TensorZero
Open-source stack for building industrial-grade LLM applications
Side-by-side
Portkey is the more established option (raised $18M); pricing is comparable on both sides.
| Metric | Portkey | TensorZero |
|---|---|---|
| Taglinei | The control plane for production AI | Open-source stack for building industrial-grade LLM applications |
| Foundedi | 2023🏆 | 2024 |
| HQi | San Francisco, US | New York, US |
| Employeesi | 11-50🏆 | 1-10 |
| Neuron scorei | 73🏆 | 66 |
| Total fundingi | $18M🏆 | $7.3M |
| Latest roundi | Seed | Seed · Aug 2025 |
| Valuationi | — | — |
| Cheapest paid plani | Pricing not disclosed | Pricing not disclosed |
| Free plani | ✓ | ✓ |
| Free triali | ✓ | ✗ |
| Top tier pricei | Pricing not disclosed | Pricing not disclosed |
| Pricing summaryi | Free | Open source |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Portkey and TensorZero.
| Capability | Portkey | TensorZero |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✓ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✓ | ✓ |
| Free trial | ✓ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Portkey
- Has raised more capital ($18M vs $7.3M)
- Higher Neuron score (73 vs 66)
- Offers a free trial
- More mature (2023)
🔵 Strengths of TensorZero
- Newer company (2024)
Which should you choose?
Choose TensorZero if price matters most — it starts at Open source, 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 Portkey if you want the most established option — it has raised $18M, 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 TensorZero — which is better?
It depends on your priority. Portkey has raised more capital and is the more established option; TensorZero has broader feature depth. See the side-by-side table above.
Is Portkey cheaper than TensorZero?
No — TensorZero's cheapest paid plan is Open source, while Portkey's is Free.
Do Portkey and TensorZero offer free plans?
Portkey: Yes, has a free plan. TensorZero: Yes, has a free plan.
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