Helicone joined Mintify — if your priorities just changed, read on

Helicone did logging. EvalGuard does logging + five more things.

Drop-in proxy replacement — change the base URL, keep your SDK code. You get request/response logging, cost tracking, and caching just like Helicone. Plus red-team security (249 plugins), LLM firewall, evals (106 scorers), and prompt IDE in the same workspace.

Swap the URL, done See quickstart

What you keep — and what you gain

Keep

✓ Drop-in proxy — change one URL, keep your SDK
✓ Full request / response logging
✓ Cost tracking per model, per user
✓ Response caching (semantic + exact)
✓ Custom tags / properties for segmentation
✓ Rate limiting per key
✓ Generous free tier (10K traces/month)

Gain

+ Real-time LLM firewall (input + output)
+ 249 red-team plugins with threat-feed sync
+ 106 eval scorers (LLM-as-judge, pairwise, rubric)
+ Prompt IDE + optimizer across 87 providers
+ OTel trace correlation web→worker→LLM
+ Drift detection + auto-reeval on regression
+ 33 compliance frameworks + audit log

Proxy URL mapping

Replace the base URL and change one header. Your SDK code, your provider keys, and your custom metadata stay exactly the same.

Helicone	EvalGuard	Notes
https://oai.helicone.ai/v1	https://evalguard.ai/api/v1/gateway/proxy	Same drop-in base-URL pattern; EvalGuard routes to the right provider based on the model name.
https://anthropic.helicone.ai	https://evalguard.ai/api/v1/gateway/proxy	Same endpoint — claude-* model names auto-route to Anthropic.
Authorization: Bearer $OPENAI_KEY	Authorization: Bearer $PROVIDER_KEY	Or let EvalGuard hold your provider keys and drop the header entirely.
Helicone-Auth: Bearer $HELICONE_KEY	X-EvalGuard-Key: eg_...	Proxy auth header — get yours at /dashboard/settings.
Helicone-Property-*: metadata	X-EvalGuard-Tags: tag1,tag2	Custom tags work identically.

One-line migration

// Before — Helicone

- baseURL: "https://oai.helicone.ai/v1",

- defaultHeaders: { "Helicone-Auth": `Bearer ${HELICONE_KEY}` },

// After — EvalGuard

+ baseURL: "https://evalguard.ai/api/v1/gateway/proxy",

+ defaultHeaders: { "X-EvalGuard-Key": EG_KEY },

Log once. Secure, eval, optimize — everywhere.

Observability is the hook. The platform is why you stay.

Start free — 10K traces / month