Best Helicone Alternatives 2026

Top alternatives to Helicone for code assistants

Helicone

★★★★☆ Freemium

LLM observability proxy for logging, caching, and analyzing every AI call

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5 Best Alternatives to Helicone

#1

Langfuse

★★★★☆ 4.4/5 Open Source

Open source observability with stronger eval and prompt management

Open source LLM observability platform for traces, evaluations, and prompt management

Full LLM call tracing with input/output captureAgent and multi-step workflow visualizationPrompt versioning and A/B testingLLM-as-judge and human eval scoring
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#2

Portkey

★★★★☆ 4.3/5 Freemium

LLM gateway with routing, guardrails, and observability

Full-stack LLM gateway with routing, fallbacks, semantic caching, and guardrails

Multi-provider routing with 250+ AI servicesAutomatic fallbacks and retry logicSemantic caching across providersInput/output guardrails for safety and compliance
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#3

LiteLLM

★★★★☆ 4.4/5 Open Source

Open source proxy with cost tracking, requires self-hosting

Open source Python library to call 100+ LLMs with one unified OpenAI-compatible interface

100+ LLM providers via one interfaceOpenAI-compatible Python and REST APISelf-hosted proxy with load balancingAutomatic retries and provider fallbacks
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#4

Braintrust

★★★★☆ 4.3/5 Freemium

Evals-first platform with tracing, stronger on evaluation workflows

AI evaluation and testing platform for measuring and improving LLM output quality

Dataset management for eval test casesLLM-as-judge and custom scoring functionsPrompt versioning and A/B comparisonProduction traffic sampling and scoring
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#5

NotDiamond

★★★★☆ 4/5 Freemium

Intelligent routing that optimizes costs across providers, complementary to observability

AI model router that automatically picks the best LLM for each task

Automatic task classification and model routingSupports GPT-4o, Claude, Gemini, Llama, MistralOpenAI SDK-compatible drop-in replacementCost and quality tradeoff configuration
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Quick Comparison

Tool Rating Pricing Category Why Consider It
Langfuse ★★★★☆ 4.4 Open Source Code Assistants Open source observability with stronger eval and prompt management
Portkey ★★★★☆ 4.3 Freemium Code Assistants LLM gateway with routing, guardrails, and observability
LiteLLM ★★★★☆ 4.4 Open Source Code Assistants Open source proxy with cost tracking, requires self-hosting
Braintrust ★★★★☆ 4.3 Freemium Code Assistants Evals-first platform with tracing, stronger on evaluation workflows
NotDiamond ★★★★☆ 4 Freemium Productivity & Workflow Intelligent routing that optimizes costs across providers, complementary to observability
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