Helicone routes LLM traffic through a proxy — one base URL change unlocks cost logs and caching. Peekr runs inside your process — zero proxy hop, 17 regulatory packs enforced before output reaches your app.
No credit card · MIT license · 17 compliance packs on Pro
The architecture
Helicone
Peekr — in-process, framework-agnostic
Side by side
| Capability | Helicone | Peekr |
|---|---|---|
| Instrumentation model | Proxy (base URL change) or async logging | Class-level patch, no proxy |
| Added network latency | ~20–40ms per proxy hop (async mode avoids) | zero added latency |
| In-process compliance enforcement | alerting only, no built-in packs | 17 packs (HIPAA, FDCPA, FINRA…) on Pro |
| LLM response caching | cache repeated prompts | not a caching layer |
| Claim-level hallucination scoring | not offered | built-in, every sentence scored |
| Cost & latency dashboards | per-user, per-model breakdown | span-level cost + latency |
| Provider keys stay in your stack | proxy path sends keys to Helicone cloud | keys never leave your process |
| MIT / self-host | open-source, self-hostable | MIT SDK; VPC self-host on Enterprise |
✓ = present · ✗ = not offered. "Added network latency" row for Helicone reflects the proxy path; async logging mode avoids the hop.
The compliance gap
Helicone shows you what happened after the fact — request logs, cost, latency. Peekr enforces 17 regulatory packs in your call path, blocking violations and writing a tamper-evident audit log before output ever reaches your application. Available on the $99/mo Pro plan.
Where Helicone wins
Peekr is not a proxy, a caching layer, or a per-user billing dashboard.
You want single-line proxy setup
Helicone's proxy mode requires only a base URL change — no code changes to your existing LLM calls. If the fastest possible setup and a rich logging dashboard are the goal, Helicone's proxy path is hard to beat.
You want LLM response caching
Helicone caches LLM responses so repeated identical prompts are served from cache, cutting cost and latency. Peekr is not a caching layer — it observes and enforces inside your process but does not cache responses.
You need per-user analytics
Helicone tracks cost, latency and request volume by user — useful for product teams billing per-user or debugging user-specific regressions. Peekr's span dashboard focuses on compliance and trace structure, not user-level cost roll-ups.
FAQ
For teams that need in-process regulatory compliance and zero proxy latency, yes. Peekr instruments your code at the class level — one call before any imports, no proxy in your request path — and enforces 17 compliance packs (HIPAA, FDCPA, FINRA, GDPR…) before LLM output reaches your application. Helicone routes traffic through its proxy to provide request logs, cost dashboards, and LLM caching. If dashboards, caching, and single-line base-URL setup are your priorities, Helicone is a strong fit.
Yes. Helicone works by routing requests through its cloud proxy (you change the OpenAI base URL to oai.helicone.ai). Independent benchmarks have measured roughly 20–40ms added per request for a proxy hop, and an additional network round trip is always in your critical path. Helicone also offers an async logging mode that avoids the proxy hop, but moves cost/latency tracking out of the hot path. Peekr patches the SDK client class inside your process — zero added network latency, no proxy, no third-party network dependency for enforcement.
Helicone does not ship pre-built regulatory compliance packs as enforced guardrails. It provides request logging and custom alerting where you can detect issues — but blocking violations and tamper-evident audit logging are not built in. Peekr ships 17 regulatory packs (HIPAA, FDCPA, FINRA, GDPR, EU AI Act, and more) enforced in-process on the $99/mo Pro plan: violations are blocked and audit-logged inside your own process before output ever reaches your app.
Auto-instruments OpenAI, Anthropic, Gemini, Bedrock, and more. 17 in-process compliance packs. Claim-level hallucination scoring. MIT-licensed. Free up to 10k spans/month.