Trade-offs in LiteLLM, Helicone, and Portkey routing

Routing logic and latency

LiteLLM is the most flexible choice for platform teams that need to manage their own infrastructure and routing logic. The proxy supports 100+ providers and lets you pick strategies like weighted pick, least-busy, or latency-based routing. By using Redis, you can track usage and implement session affinity to keep conversations on the same deployment. LiteLLM provides specialized routing like lowest cost routing which uses a model cost map to select the cheapest deployment, and you can also use traffic mirroring to mimic production traffic to a secondary model for evaluation without affecting latency. LiteLLM also supports routing groups that allow you to apply different strategies to different models in one deployment, but it begins to struggle with latency when running at 500 requests per second on a single instance. Helicone provides a faster alternative for developers who want low latency, as its Rust implementation achieves ~8ms P50 processing time. Helicone provides a faster alternative for developers who want low latency, while Portkey provides routing and reliability, but it introduces 20-40ms of overhead when you use advanced features like complex routing or guardrails. Portkey handles complex scenarios like cascading fallbacks and intelligent load balancing across multiple providers, and it maintains 99.99% uptime.

Observability and governance

Portkey is the better selection for production workloads that demand enterprise-level governance. It connects to 1,600+ models and handles prompt versioning, A/B testing, and environment promotion. Portkey provides semantic caching to reduce latency and costs, and its guardrails include PII detection and jailbreak protection. Helicone provides a lightweight proxy that gives you request-level visibility with a single line of code. However, Helicone lacks the advanced role-based access control and audit logging required by regulated industries. Portkey manages 1,600+ models and provides tools for prompt management and environment promotion, but Helicone remains the better choice for developers who prioritize minimal latency through its Rust implementation and edge deployment. You will need to weigh these performance trade-offs against your compliance needs. Helicone works with any LLM provider that accepts HTTP requests, such as OpenAI, Anthropic, or Gemini. Helicone has a 64MB memory footprint and was acquired by Mintlify in March 2026, which left some users wondering about the platform’s future direction. Does the current focus on observability still take priority after the acquisition?

Infrastructure and cost

LiteLLM is the most capable option for teams that require full control over deployment and data flows. The open-source version of LiteLLM is free, but you must manage the engineering time for setup and the security risk of patching. In March 2026, malicious LiteLLM versions 1.82.7 and 1.82.8 appeared on PyPI, which demonstrates the responsibility of self-hosting. Enterprise users can upgrade to get SSO, audit logs, and professional support with specific SLAs. LiteLLM supports the four most recent stable minor lines, and the oldest line reaches end of life when a new one is promoted. LiteLLM also enables users to group virtual keys by application or use-case with per-project budgets and rate limits, and users can also integrate with secret managers like AWS KMS, Azure Key Vault, and Google Secret Manager. LiteLLM can handle 350+ RPS on 1 vCPU, but you must account for infrastructure costs like a $50/month VM and engineering hours. LiteLLM has more than 40,000 GitHub stars and 1,300 contributors in 2026, and standard support for enterprise customers is available from 9am to 9pm PST, Monday through Friday. Portkey is a managed platform that processes 2.5 trillion tokens, but its pricing scales based on log volume.