TensorZero
Open-source LLMOps stack unifying gateway, observability, evaluations, optimization and experimentation.
| Category | Observability & Tracing |
| Open source | Yes |
| Self-hostable | Yes |
| Pricing model | free |
| Pricing notes | Fully open source (Rust gateway + ClickHouse storage) |
| Framework integrations | OpenAI SDK, Anthropic, vLLM |
| Funding / ownership | $7.3M seed (2025) |
Pricing/feature source: https://github.com/tensorzero/tensorzero