Inference Labs › Alternatives › vs Langfuse
Inference Labs vs Langfuse
Honest, dated comparison of Inference Labs and Langfuse -- router architecture, eval pipeline, pricing, public utilities, and when to pick each. Updated 2026-05-28.
Langfuse
Open-source LLM engineering platform: tracing, evals, prompt management, dataset workflows.
Strengths
- Strongest open-source trace/dataset/eval UI in the space.
- Mature integrations with every major framework and provider.
- Self-hostable end-to-end (MIT-ish license) with a generous cloud tier.
- Sophisticated prompt management + versioning workflow.
Inference Labs
Vendor-neutral multimodal router + cache + eval pipeline. BYO provider keys, per-workspace policy router, JSONL eval/SFT exports, MCP server for Claude Desktop.
Where Inference Labs differs
- Inference Labs is a router + evaluator; Langfuse is primarily observability + eval. They are complementary, not competitive, on the eval surface.
- Inference Labs picks the model per request based on policy; Langfuse generally assumes you've already decided.
- Public free pricing API + MCP server + embeddable widgets, all zero-auth.
- Inference Labs ships Stripe billing + per-workspace credit ledger out of the box.
Feature-by-feature
| Capability | Langfuse | Inference Labs |
|---|---|---|
| Routing vs observability focus | Observability | Routing + observability |
| Per-request policy routing | No | Yes |
| Prompt management UI | Yes (strong) | Roadmap |
| Eval datasets + UI | Yes | Yes |
| JSONL SFT/preference exports | Yes | Yes |
| Free public pricing API | No | Yes |
| MCP server for Claude Desktop/Cursor | No | Yes |
Which one should you pick?
Pick Langfuse if…
you want observability + prompt management + eval workflows on top of an LLM stack you route yourself.
Pick Inference Labs if…
you want the routing layer itself (with similar eval surface on top), plus zero-auth public utilities you can integrate into your own tools.
Many teams adopt both: Langfuse for one workload (or its specific strength) and Inference Labs for the routing + evaluation layer. The platforms are not mutually exclusive.
Try Inference Labs free. 500 credits, no card required, takes 30 seconds to send your first routed request. Create an account → or read the 5-min quickstart.
Frequently asked
Is this comparison biased toward Inference Labs?
We try to be honest. We name Langfuse's real strengths up front, then describe where Inference Labs is genuinely different -- not better at everything. If you spot something factually wrong, email [email protected] and we will update the page.
Can I use both?
Yes. Inference Labs is BYO-provider-key and never requires you to drop another tool. Many users wire Langfuse for one surface (e.g. observability) and Inference Labs for the routing + eval pipeline.
Where can I see live pricing?
Our public dataset is at /api/prices.json (CC BY 4.0) and the human view is at /benchmarks.html. To estimate your spend, use the cost calculator.