LLM Integration Services

One governed LLM layer for the enterprise

LLM integration services — LLM API integration into your applications, data and workflows through a provider-agnostic gateway with routing, fallback, retrieval, guardrails and observability.

Route
By use case, cost or latency
Fallback
When a provider degrades
Per-team
Quotas and cost reporting

Quick answerLLM integration services connect large language models into your applications, data and workflows through a governed, provider-agnostic layer — an LLM gateway with routing and fallback, retrieval to your systems of record, prompt and policy management, guardrails, and observability for quality, latency and cost. It keeps ‘integration’ intent in one place, alongside our OpenAI and Claude services.

The gateway

What a single LLM layer gives you

Routing & fallback

Each request goes to the cheapest capable model, with automatic fallback if a provider degrades.

Central prompt & policy

One place to manage system prompts, safety policy and structured-output schemas.

Cost control

Per-team quotas and budgets, caching, and cost-per-request and cost-per-user reporting.

Security & keys

Secrets held centrally, per-app authorisation, and one place to enforce logging and redaction.

Shared retrieval

A retrieval service any application can call to ground answers in enterprise data.

Observability

Latency, quality and error rates per model and per app, with alerting wired to ownership.

Before vs after

Direct provider calls compared with a gateway

Applications calling providers directly compared with a governed LLM gateway
ConcernDirect callsLLM gateway
Switch or A/B a modelCode change per appConfig change, no app change
Cost visibilityScattered across accountsPer-team, in one place
Provider outageApp breaksAutomatic fallback
Prompt / policy updatesPer appCentral
Security & loggingDuplicated, inconsistentEnforced once
How we deliver

A path to a governed LLM layer

Assess

Current LLM usage, providers, cost and pain points.

Stand up

The gateway with routing, caching, keys and logging.

Migrate

Applications onto the gateway, one at a time, no big bang.

Ground

Add the shared retrieval service for RAG use cases.

Optimise

Routing and caching tuned against real cost and quality data.

Why Relevance Lab

An LLM layer your platform team can own

Provider-agnostic

OpenAI, Claude, Gemini and open models behind one endpoint.

FinOps for AI

Quotas, budgets and cost-per-use reporting so spend is owned.

Security-first

Central secrets, per-app authorisation, redaction and audit logging.

Platforms behind the team

RLCatalyst and Spectra accelerate build and run.

Retrieval built in

A shared grounding service, not a per-app rebuild.

Maintainable

A clean layer your team can extend and operate.

350+
Data & AI specialists
150+
Data & AI projects delivered
170+
Certified engineers
30‑60‑90
Day roadmap to your first AI use case
Alliances & partners
  • AWS
  • DataStax
  • Salesforce
  • Snowflake
Related services

Provider-specific integration

For OpenAI and Claude specifically, see OpenAI & ChatGPT Integration and Claude & Anthropic Integration — both plug into the same gateway.

OpenAI & ChatGPT Integration Services
FAQ

LLM Integration Services: frequently asked questions

LLM integration services connect large language models into your applications, data and workflows through a governed, provider-agnostic layer — an LLM gateway with routing and fallback, retrieval to your systems of record, prompt and policy management, guardrails, and observability for quality, latency and cost.

So that 'integration' intent lives in one place. LLM Development covers building models and applications; AI Integration — including this page — owns connecting them into the enterprise, alongside our OpenAI and Claude integration services.

An LLM gateway is a single internal endpoint every application calls instead of talking to providers directly. It gives you model routing and fallback, central prompt and policy control, per-team cost tracking and quotas, caching, and one place to enforce security and logging.

Yes — routing by use case, cost, latency or availability, with automatic fallback if a provider degrades, and the ability to A/B or shadow-test a new model without touching application code.

Central caching, model routing to the cheapest capable model, context and token controls, per-team quotas and budgets, and cost-per-request and cost-per-user reporting so spend is visible and attributable.

Content last reviewed: September 2026

Cross-cutting practice

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