The Best TensorZero Alternatives in 2026

Respan unifies LLM observability, evals, prompt optimization, and an AI gateway so teams can ship reliable AI applications.

Deepchecks evaluates and monitors AI agents using testing, tracing, dataset scoring, and production observability tools.

PromptLayer supports prompt versioning, LLM evaluations, and production monitoring with traces, logs, and regression sets.

Confident AI provides evaluation, observability, red-teaming, and governance tools for testing and monitoring AI systems.

Comet's Opik platform provides AI observability, agent testing, evaluation, and monitoring for developers.

Glide provides an open model gateway for developing production generative AI applications.

Bifrost by Maxim AI is an open-source AI gateway for LLMs, MCP and agents with routing, governance, guardrails and observability, supporting 8+ providers and 1000+ models via a drop-in SDK replacement.

Guardrails AI provides a framework for building, governing, and deploying reliability controls for generative AI systems.

LLM Gateway routes, manages, and analyzes requests across more than 40 language-model providers through one API.

LiteLLM provides an AI gateway and LLM proxy with model routing, usage tracking, spend controls, and support for many providers.

Featherless is a serverless AI inference platform for open-weight models with API access to tens of thousands of models.

Monkt converts PDFs, Word, PowerPoint, Excel, CSV, webpages, and HTML into Markdown or structured JSON.

Flaq offers one API for accessing AI image, video, 3D, music, and language models.

The abso TypeScript SDK calls more than 100 LLM providers through an OpenAI compatible format.

Ollama runs language models locally and provides tools to work with model files and APIs.

Stakpak runs an agent on a machine to ship code and keep applications running.

Hugging Face Text Embeddings Inference serves text embedding models through an inference solution.

OpenModelZ scales LLM inference on Kubernetes with engines including vLLM, SGLang, and LMDeploy.

Hopsworks provides a feature store and MLOps platform for building and operating production machine learning systems.

Arize Phoenix provides observability and evaluation tools for AI applications and systems.

Langfuse provides open-source evaluation and observability tools for tracing and improving AI agents.

DigitalOcean offers cloud infrastructure for AI agents, inference, and production AI products.

Baseten provides an inference platform for serving and scaling open-source and custom AI models in production.

Galileo evaluates, monitors, and protects generative AI applications through observability tools for AI teams.