Helicone vs Langfuse
A detailed comparison to help you choose between Helicone and Langfuse.
🏆
Verdict: Langfuse wins
Langfuse scores 4.3/5, edging out Helicone at 3.6/5. Engineering teams running LLM apps or agents in production who want framework-agnostic tracing and evaluation with either a cheap managed cloud or a free self-hosted stack.
Helicone Open-source LLM observability and monitoring platform | Langfuse Open-source LLM observability and evaluation | |
|---|---|---|
| Rating | 3.6 (1 review) | 4.3 (1 review) |
| Pricing Model | freemium | freemium |
| Starting Price | Free tier available | Free tier available |
| Best For | Teams that want immediate LLM cost and latency visibility with near-zero integration work, and who are willing to pair it with a planned migration or a self-hosted fallback given the maintenance-mode status. | Engineering teams running LLM apps or agents in production who want framework-agnostic tracing and evaluation with either a cheap managed cloud or a free self-hosted stack. |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | free tieropen sourceapi access | free tieropen sourceapi access |
| Visit Helicone → | Visit Langfuse → |
Helicone
Pros
- + One-line proxy integration (change the base URL) is still the fastest instrumentation path I have used in this category
- + Apache-2.0 repo with commits still landing in October 2026 — the self-host hedge is real, not theoretical
- + Free Hobby tier (10,000 requests/month, 1 GB storage, one seat) is enough to fully instrument a side project or staging without a credit card
- + Gateway with fallbacks, caching, and custom rate limits plus observability in one hop; 0% markup claimed on provider credits
Cons
- - Acquired by Mintlify in March 2026 and in maintenance mode — no product roadmap, so plan a migration date regardless
- - Docs claim '$20/seat' while pricing sells a flat $79/month Pro plan; the information surface is drifting
- - Evaluation, tracing, and user tracking are self-described as limited versus dedicated platforms and will not improve now
- - Long-term hosting terms and end-of-life date are unpromised; consolidating provider billing through a departing team is a concentration risk
Langfuse
Pros
- + MIT-licensed core with free, unrestricted self-hosting — only named enterprise features like audit logs and SCIM need a licence key
- + A 5-seat team at 100k traces runs roughly $69/month versus about $420/month for the main closed alternative (Panoply's independent estimate, consistent with my bills)
- + OpenTelemetry-native tracing across OpenAI SDK, LangChain, LlamaIndex, Pydantic AI, Vercel AI SDK, CrewAI and raw OTLP
- + Graduated usage pricing is transparent and cheap: worked examples on the pricing page match my own invoices (200k units on Core = $37/month)
- + Dataset-backed evaluation with the langfuse/experiment-action GitHub step let me gate prompt changes in CI on a real test set
Cons
- - v3 self-hosting needs Postgres, ClickHouse, Redis and S3 where v2 ran on one container — a four-service system to operate
- - Heavy agent traces render slowly in the UI (issue threads #10391 and #9933 match the multi-second loads I measured)
- - Online evaluations score a sample of traffic rather than everything, so rare failure modes can go unscored
- - UI-configured evaluators cannot be triggered programmatically for scheduled pipelines in my setup
- - Owned by ClickHouse, Inc. since January 2026 — licence unchanged so far, but the vendor-independence profile shifted
Frequently Asked Questions
Which is better, Helicone or Langfuse?▼
Langfuse scores higher at 4.3/5 vs 3.6/5 for Helicone, making it the better-rated option in our comparison.
What is the difference between Helicone and Langfuse?▼
Helicone: Helicone is an open-source gateway and observability layer for LLM applications, logging requests, costs and latency across providers. Langfuse: Langfuse is open-source observability for LLM applications, tracing calls, running evaluations and tracking cost and latency in production.
Is Helicone or Langfuse more affordable?▼
Helicone starts at €0/mo, Langfuse starts at €0/mo. Check the comparison table above for current pricing.
Stay in the loop
Get weekly updates on the best new AI tools, deals, and comparisons.
No spam. Unsubscribe anytime.