Langfuse vs Portkey: Which Should You Choose in 2026?
Choosing between Langfuse and Portkey comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
By Toolradar Team · Last updated May 6, 2026 · Methodology
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Langfuse
Open Source LLM Engineering Platform for debugging and improving your LLM application.
Best for you if:
- 0
- • You need debugging features specifically
- • Provides observability, traces, and metrics for LLM applications.
- • Offers prompt management, evaluation, and annotation features.
Portkey
Production stack for Gen AI builders: AI Gateway, Observability, Guardrails, Governance, and Prompt Management.
Best for you if:
- 0
- • You need api tools features specifically
- • Unified AI Gateway for 1600+ LLMs with smart routing and caching.
- • Comprehensive observability, guardrails, and governance for Gen AI applications.
| At a Glance |  Langfuse |  Portkey |
|---|---|---|
Price | Free + Paid | Free + Paid |
Best For | Debugging | API Tools |
Rating | — | — |
| Feature | Langfuse | Portkey |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | DebuggingAI Prompt Tools | API ToolsAI Model Deployment |
How Langfuse and Portkey Compare
Langfuse
Open Source LLM Engineering Platform for debugging and improving your LLM application.
Free tier available
Portkey
Production stack for Gen AI builders: AI Gateway, Observability, Guardrails, Governance, and Prompt Management.
Free tier available
Langfuse is a debugging tool. Portkey is in api tools.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: Langfuse
Want the highest-rated option?
Neither has user reviews yet.
Go with: Langfuse
Value user reviews?
Neither has user reviews yet.
Go with: Langfuse
3 Questions to Help You Decide
What's your budget?
Both are freemium. Pricing won't help you decide here.
What's your use case?
Langfuse is a debugging tool. Portkey is in api tools. Pick the category that matches your needs.
How important are ratings?
Neither has user reviews yet.
Key Takeaways
Langfuse
- 0
- Free tier available
- Our pick for this comparison
Portkey
- Better fit for api tools
The Bottom Line
Langfuse is our pick.
Frequently Asked Questions
Is Langfuse or Portkey better?
Langfuse is rated high in our evaluation. Both are freemium.
What are Langfuse and Portkey used for?
Langfuse: Open Source LLM Engineering Platform for debugging and improving your LLM application.. Portkey: Production stack for Gen AI builders: AI Gateway, Observability, Guardrails, Governance, and Prompt Management..
What does Langfuse cost vs Portkey?
Langfuse is freemium (free tier + paid plans). Portkey is freemium (free tier + paid plans). Visit their websites for detailed pricing.