LLM integration services for products and business workflows. Connect models to applications, data, RAG, APIs, tools, evaluation, and production controls.

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15+

Years building production software

120+

Engineers across delivery pods

75+

Clients served in North America

3K+

Successful product releases

Why Logiciel

Why LLM Integration Needs More Than an API Call.

Why Logiciel · 01

A model API does not know your application state, user permissions, business rules, source systems, or workflow requirements by default.

Why Logiciel · 02

Production integrations need clear boundaries around what data is sent to models, what context is retrieved, and what outputs can influence downstream systems.

Why Logiciel · 03

Free-form model responses often need schemas, validation, retries, deterministic checks, and application logic before they can be used reliably.

Why Logiciel · 04

Different tasks may require different models based on capability, latency, cost, privacy, context size, and provider availability.

Why Logiciel · 05

LLM features need evaluation against representative user scenarios because conventional software tests cannot fully measure model-backed behavior.

Why Logiciel · 06

Model providers, versions, prompts, APIs, and pricing can change, so integration architecture should reduce unnecessary coupling.

Why Logiciel · 07

Production LLM workflows need observability, fallbacks, rate controls, error handling, security boundaries, and a plan for continuous improvement.

What you get

What You Get From Logiciel LLM Integration Services.

We combine AI engineering, software development, data integration, and platform engineering to embed LLM capabilities into enterprise applications without treating the model as the whole product.

LLM integration around real workflows

connecting model capabilities to application state, user context, business rules, data, APIs, and the steps users already perform

Flexible model access architecture

supporting appropriate providers and models through reusable interfaces, routing, authentication, configuration, and controlled abstraction

Grounded application context

combining LLMs with RAG, approved data, metadata, user context, and source systems when the task requires information beyond the base model

Structured and validated outputs

using schemas, parsing, validation, retries, deterministic checks, and application logic before model output reaches downstream workflows

Secure system integration

controlling data flows, secrets, identity, permissions, logging, tool access, and external connections around model-backed features

Measurable LLM performance

evaluating quality, task success, grounding, structured output, latency, cost, failure behavior, and workflow-specific acceptance criteria

Production-ready LLM operations

adding observability, fallbacks, rate controls, caching, provider handling, versioning, and change management for live applications

Technology

LLM Integration Across Enterprise Workflows.

LLM Features in Existing Products

What it meansAdd summarization, extraction, classification, drafting, search, or conversational capabilities to established applications.

Enterprise Copilot Integration

What it meansConnect LLMs to approved knowledge, user context, APIs, and workflows while preserving permissions and operational controls.

LLM-Powered Support Workflows

What it meansIntegrate models into service operations for response drafting, case summarization, knowledge retrieval, and routing.

Document and Content Workflows

What it meansUse LLMs for structured extraction, comparison, transformation, summarization, and controlled content generation.

LLM Integration for Internal Tools

What it meansBring model capabilities into internal portals, operations systems, analytics experiences, and employee workflows.

Multi-Model Application Architecture

What it meansRoute tasks across models based on capability, latency, cost, privacy, availability, and application requirements.

LLM Integration for AI Agents

What it meansConnect models to retrieval, tools, business systems, workflow state, and approval logic for bounded agentic execution.

Technology

LLM Integration Models Built Around Your Team.

Dedicated LLM Integration Squad

AI, software, data, platform, and QA engineers work across architecture, model integration, RAG, APIs, structured outputs, evaluation, deployment, and improvement.

LLM Engineering Team Extension

Specialists strengthen your existing team across model APIs, application integration, data access, retrieval, orchestration, evaluation, observability, and production engineering.

Outcome-Based LLM Integration Engagement

A focused initiative integrates LLM capability into one product feature, copilot, document workflow, support experience, internal application, or agentic process.

Under the hood

LLM Integration Services We Deliver.

LLM Use-Case and Architecture Design

We map the user workflow, application context, data, permissions, latency needs, output requirements, integration points, and acceptance criteria before selecting the model architecture.

Included

Model API and Gateway Integration

We connect approved model providers through secure interfaces with authentication, configuration, routing, quotas, retries, caching, usage tracking, and provider abstraction where useful.

Included

RAG and Context Integration

We connect LLMs to approved knowledge, databases, documents, metadata, and user context through retrieval and application logic designed around the task.

Included

Structured Output and Workflow Engineering

We implement schemas, tool calls, validation, retries, deterministic checks, state management, and downstream application logic around model outputs.

Included

Application and API Integration

We embed LLM capabilities into web, mobile, SaaS, internal, and backend systems through APIs, events, queues, services, and existing business workflows.

Included

LLM Evaluation and Testing

We test representative scenarios across task success, grounding, structured output, tool use, failure handling, latency, cost, and application-specific quality criteria.

Included

Production Monitoring and Optimization

We instrument model calls, errors, latency, token usage, cost, fallbacks, application events, and quality signals while improving the integration after launch.

Included

Technology

LLM Integration Insights & Frameworks.

Model Selection and Routing Matrix

A framework for matching tasks to models based on capability, latency, cost, privacy, context requirements, availability, and operational constraints.

Technology

LLM Integration Boundary Model

A method for deciding which responsibilities belong to the model, retrieval layer, deterministic application logic, tools, validation, and human review.

Technology

LLM Change and Regression Framework

A framework for deciding which evaluations and integration tests should rerun when models, prompts, providers, retrieval, tools, schemas, or application logic change.

Technology

Our LLM Integration Framework.

Map the Workflow and Integration Points

We identify users, tasks, application state, data, APIs, permissions, expected outputs, latency needs, and the systems the LLM feature must interact with.

Select the Model and Context Architecture

We define model access, routing, RAG, context construction, structured outputs, tool use, security boundaries, fallbacks, and acceptance criteria.

Build the LLM Integration

We implement model APIs, retrieval, schemas, validation, services, queues, application connections, logging, and workflow logic around the feature.

Evaluate and Test Real Scenarios

We test task quality, grounding, structured output, failures, latency, cost, permissions, provider issues, and downstream behavior against representative cases.

Deploy, Monitor, and Improve

We monitor production usage, errors, latency, cost, model behavior, fallbacks, and workflow outcomes while refining the integration as requirements change.

Selected work

Tailored engineering for your industry.

Zeme · Real Estate Cut development costs 50% and launched 3× faster with dedicated dev teams.

Real Estate

Cut development costs 50% and launched 3× faster with dedicated dev teams.

Leap · Construction Scaled to 7-figure ARR with AI-augmented software teams.

Construction

Scaled to 7-figure ARR with AI-augmented software teams.

KW · Real Estate 56M+ workflows automated, saving agents 30% time with AI-powered tasks.

Real Estate

56M+ workflows automated, saving agents 30% time with AI-powered tasks.

Resources

Insights for tech leaders.

Whitepaper · PDF

The Model Evaluation Report

Whitepaper · PDF

The Economics of Model Evaluation

Whitepaper · PDF

Benchmarking Model Evaluation

In their words

What our clients say.

Teams that needed to ship fast, and did. Here's what partnering with Logiciel felt like from the inside.

I would highly recommend them to anyone looking to scale quickly or needing support in engineering, product, or QA.

Patrick Fingles

CEO, Leap

We don't just call them Logiciel; they're part of the Zeme team. Within the first week they were contributing meaningfully to our codebase.

Elior Alayev

Founder & CEO, Zeme

The Logiciel team worked tirelessly and built everything we needed, with security and best practices across our entire platform. It allowed us to become #1 in our industry, and we couldn't have done it without them.

David Buzzelli

Co-Founder, JobProgress

Questions

Frequently asked questions.

What are LLM integration services?

LLM integration services connect language models to existing products, data, APIs, knowledge sources, and business workflows. The work can include model APIs, RAG, structured outputs, tool use, application logic, evaluation, monitoring, and production engineering.

Can LLMs be integrated into an existing application?

Yes. LLM capabilities can be added to existing web, mobile, SaaS, internal, and backend applications through APIs and services without rebuilding the entire product around the model.

How do you choose which LLM to integrate?

Model selection should reflect the task, required quality, latency, cost, privacy, context size, structured-output needs, tool support, availability, and operational constraints. Different workflows may justify different models.

When does an LLM integration need RAG?

RAG is useful when the model needs current, private, domain-specific, or source-verifiable information that is not reliably available in the base model. Not every LLM feature needs retrieval.

How do you make LLM outputs reliable enough for software workflows?

Reliability can be improved with structured schemas, validation, retries, deterministic rules, bounded tool use, representative evaluation, fallback behavior, and human review for decisions that should not be delegated to the model.

Can an application use more than one LLM provider?

Yes. A multi-model architecture can route tasks across providers or models based on capability, latency, cost, privacy, availability, or fallback requirements. The added complexity should be justified by the application’s needs.

How do you monitor an LLM integration in production?

Monitoring can include model errors, latency, token usage, cost, fallback rates, retrieval behavior, structured-output failures, tool calls, application events, and workflow-specific quality signals.

Let's build

Add LLM Capability Without Rebuilding the Product Around the Model.

Bring us the application, workflow, or AI feature you need to integrate. We’ll help define the model architecture, data connections, evaluation, and production controls required to ship it.

Book an Intro Call

LLM Integration Services.

See Logiciel in action.

Why LLM Integration Needs More Than an API Call.

A model API does not know your application state, user permissions, business rules, source systems, or workflow requirements by default.

Production integrations need clear boundaries around what data is sent to models, what context is retrieved, and what outputs can influence downstream systems.

Free-form model responses often need schemas, validation, retries, deterministic checks, and application logic before they can be used reliably.

Different tasks may require different models based on capability, latency, cost, privacy, context size, and provider availability.

LLM features need evaluation against representative user scenarios because conventional software tests cannot fully measure model-backed behavior.

Model providers, versions, prompts, APIs, and pricing can change, so integration architecture should reduce unnecessary coupling.

Production LLM workflows need observability, fallbacks, rate controls, error handling, security boundaries, and a plan for continuous improvement.

What You Get From Logiciel LLM Integration Services.

LLM integration around real workflows

Flexible model access architecture

Grounded application context

Structured and validated outputs

Secure system integration

Measurable LLM performance

Production-ready LLM operations

LLM Integration Across Enterprise Workflows.

LLM Features in Existing Products

Enterprise Copilot Integration

LLM-Powered Support Workflows

Document and Content Workflows

LLM Integration for Internal Tools

Multi-Model Application Architecture

LLM Integration for AI Agents

LLM Integration Models Built Around Your Team.

Dedicated LLM Integration Squad

LLM Engineering Team Extension

Outcome-Based LLM Integration Engagement

LLM Integration Services We Deliver.

LLM Use-Case and Architecture Design

Model API and Gateway Integration

RAG and Context Integration

Structured Output and Workflow Engineering

Application and API Integration

LLM Evaluation and Testing

Production Monitoring and Optimization

LLM Integration Insights & Frameworks.

Model Selection and Routing Matrix

LLM Integration Boundary Model

LLM Change and Regression Framework

Our LLM Integration Framework.

Map the Workflow and Integration Points

Select the Model and Context Architecture

Build the LLM Integration

Evaluate and Test Real Scenarios

Deploy, Monitor, and Improve

Tailored engineering for your industry.

Cut development costs 50% and launched 3× faster with dedicated dev teams.

Scaled to 7-figure ARR with AI-augmented software teams.

56M+ workflows automated, saving agents 30% time with AI-powered tasks.

Insights for tech leaders.

The Model Evaluation Report

The Economics of Model Evaluation

Benchmarking Model Evaluation

What our clients say.

Frequently asked questions.

Add LLM Capability Without Rebuilding the Product Around the Model.