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Introducing NemoRouter: Enterprise LLM Gateway for Every Major Provider

One key, one bill, every major LLM provider. NemoRouter brings enterprise multi-tenancy, billing, and guardrails to a single managed gateway.

Nemo Team · 5 min read
Introducing NemoRouter: Enterprise LLM Gateway for Every Major Provider

The Problem with LLM Access Today

Every team building with AI hits the same wall. You need API keys from OpenAI, Anthropic, Google, Cohere, and a dozen more providers. Each has its own authentication, pricing model, rate limits, and SDK. Your engineers spend weeks writing provider-specific integration code instead of building product features.

Existing solutions force a choice: run a self-hosted open-source proxy and manage everything yourself, or pay an enterprise vendor for a closed-source gateway with opaque pricing. Neither option gives you both transparency and the operational simplicity of a managed platform.

What NemoRouter Does

NemoRouter is an enterprise LLM gateway. We provide a single API endpoint that routes to models across every major provider — OpenAI, Anthropic, Google Vertex AI, Azure OpenAI, AWS Bedrock, Cohere, Mistral, and more.

Your team gets one API key and one bill. No provider configuration, no key management, no cost reconciliation across vendors.

How It Works

NemoRouter sits in front of every model provider as a single managed gateway. Your team manages everything — auth, billing, analytics, team management, and observability — from one dashboard, while every request runs through guardrails, prompt templates, A/B tests, and cost tracking before it is routed to the right provider with automatic load balancing and failover.

You point your code at one endpoint; NemoRouter handles the rest.

Request flow

What happens inside Nemo Router when your app calls a model.

Nemo Router request flowYour application sends a request to Nemo Backend, which authenticates the virtual key, reserves credits, applies guardrails and A/B routing, then routes to the chosen provider. The provider response returns with a cost header used to settle credits and log the call.Your applicationOpenAI SDK · sk-nemo-…POST /v1/chat/completionsNemo Backend (FastAPI)Auth · virtual keyReserve creditsGuardrailsA/B routingPrompt templatesProvider routingforwardProvidersOpenAIAnthropicVertexBedrockAzureread response cost · settle credits · log · stream back

Onboarding

From sign-up to your first API call in five steps.

Nemo Router onboarding flowSix steps from signing up to making your first API call: sign up, verify email, choose plan, set up team, create your first virtual key, and make the first call.Sign upSupabase Auth1Verify emailmagic-link or pwd2Choose planTier 1 · 2 · 33Set up teamDefault auto-created4Create keysk-nemo-… (once)5First callx-nemo-* headers6One org per user · Default team auto-created · key shown once

Architecture

The services in the request path and where data lives.

Nemo Router architectureThe request path: your application connects over HTTPS to Nemo Backend (FastAPI on port 8090), which runs the provider-routing core in-process. Nemo Backend handles auth, guardrails, A/B, prompts, and credit reserve/settle against Supabase Postgres with row-level security. The routing core handles cost tracking, provider routing, fallback chains, and spend accounting before talking to OpenAI, Anthropic, Google Vertex, AWS Bedrock, or Azure OpenAI.Your applicationHTTPS · sk-nemo-…Nemo Backend · FastAPI :8090Nemo concernsAuth · Guardrails · A/B · PromptsCredits (reserve + settle)Supabase nemo schema · RLSProvider router (in-process)Cost tracking · Provider routingFallback chains · SpendPostgres public schema (Prisma)OpenAI · Anthropic · Google Vertex · AWS Bedrock · Azure OpenAI · …

Enterprise Features Built In

Multi-Tenancy

Each organization gets isolated resources — API keys, credit balances, budgets, guardrails, and usage analytics — with strict tenant isolation that guarantees zero cross-tenant data leakage.

Credit-Based Billing

Users purchase credits and spend them on API calls. Platform fees are tier-based: 4% for pay-as-you-go, 2% at Tier 2, and 0% at Tier 3. The fee is charged on top at purchase time — you always get 100% of the credits you buy. Spend is tracked accurately and protected against overspend, even under heavy concurrent load.

Guardrails and Prompt Management

Configure safety guardrails at the organization level. They apply automatically to every request, with per-request overrides available via extra_body fields. Prompt templates with version history and A/B testing let your team iterate on prompts without redeploying code.

Capacity Across Every Cloud

NemoRouter manages provider capacity across GCP, Azure, and AWS behind the scenes, with cost analysis and reconciliation built in — so you get reliable throughput and accurate billing without touching provider infrastructure yourself.

Getting Started

Sign up at nemorouter.ai, create your organization, and generate an API key. From there, point any OpenAI-compatible SDK at your NemoRouter endpoint:

import openai

client = openai.OpenAI(
    api_key="sk-nemo-your-key",
    base_url="https://api.nemorouter.ai/v1"
)

response = client.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": "Hello from NemoRouter!"}]
)

No provider keys to manage. No routing logic to write. Just one key, one bill, and access to every model you need.

What Comes Next

We are actively building out SSO integrations, expanded observability dashboards, and deeper analytics for cost optimization. Follow our changelog for updates, and reach out if you want to discuss enterprise deployment options.

Written by Nemo TeamEngineering, product, and company posts from the Nemo Router team — code-first, cost-honest, no vendor-marketing fluff.