The Best Helicone Alternatives in 2026

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.

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.

Eden AI routes requests across language and other AI models through a unified API with provider options.

TensorZero builds open-source tools for production-grade LLM applications: LLM gateway, observability, optimization, evaluations, and experimentation.

Metorial connects employees, agents, and AI clients to company tools and skills with access controls and tracing.

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

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

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.

MLflow helps teams build AI products by debugging, evaluating, monitoring, and improving AI applications.

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

Semantic Cache Router presents a distributed semantic cache and stateful routing system.

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

Manifest connects AI agents and tools to multiple model providers through an LLM gateway.

Cohere develops AI models and solutions for enterprise process automation, employee tools, and turning fragmented data into insights.

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

Compose, test, and optimize prompts for language-model applications in Promptmetheus, an IDE supporting more than 100 models.

Chutes provides serverless compute for deploying, running, and scaling AI models through its platform and API.

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

Observability and prompt management platform for LLM-based apps. Take your LLMs to the next level.

Mirai Labs builds uzu, a Rust LLM engine for Apple devices, with compact Qwen, LFM, and Muse-Glimmer models.

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

LiteLLM provides a way to call more than 100 language models through an OpenAI-compatible interface.