Providers

Every Melious inference request runs on one of our provider partners. They're all in Europe, by construction — we don't have US or APAC fallbacks, and we won't add them.

The list

Nine partners across eight countries, last we counted. The live list — including which models each one runs and their current PUE — is on melious.ai under Providers.

Data residency

Your request body and the response never leave the EU. We don't mirror traffic to any non-EU region, and our providers don't either — that's the condition of being on the list.

If you need a narrower guarantee than "EU" — for example "only providers in Germany" — that's a constraint the router can enforce internally, but there's no public request field for it yet. Tell us if you need it.

No prompt logging by Melious. A provider may retain short-lived operational logs for their own stability monitoring, but none of them train on your traffic. If a provider changes that policy, they leave the list.

How routing picks between them

A routing decision combines two inputs:

• Your flavor (balanced, speed, price, eco, or batch) — weights how much each dimension matters.
• Live provider state — measured tokens-per-second for this model, current price per token, the grid's carbon intensity at the provider's location right now, and recent error rates.

The cheapest provider isn't always chosen under balanced. The fastest isn't always chosen under speed. The scoring is a weighted sum, and other providers can tie or win on a given day.

Full mechanism and the dimension weights are in Routing.

PUE, power, and why it shows up in responses

Each provider reports a Power Usage Effectiveness (PUE) — total facility energy divided by energy actually delivered to the compute. Lower is better; 1.0 is the theoretical floor. PUE feeds into our environment_impact.energy_kwh calculation.

We publish each provider's PUE alongside their listing on the website, and it also appears on every response via environment_impact.pue. If a provider changes hardware or cooling, that number shifts — we don't hardcode it.

When a provider isn't on the list

We've got nine providers live today. If the one you need isn't on the list, tell us — we'll see what we can do. The bar is:

1. EU infrastructure, no US or APAC fallback.
2. No training on customer traffic.
3. Open-weight models only.

If all three hold, we're probably already talking to them.

Related

Environmental impact walks through what the per-response metrics mean and how they're computed. Routing covers the flavor and filter fields you'll use to steer selection.