ChatGPT Integration Services

ChatGPT integration that works in production, not just the demo.

ChatGPT is a product. The OpenAI API is the infrastructure behind it. What most businesses need is not ChatGPT, they need GPT-4o or GPT-4 Turbo integrated into their specific application, trained on their data, and delivering outputs their users can act on.
We integrate the OpenAI API into your existing web app, mobile app, or internal tool, adding AI capabilities grounded in your data, constrained to your use case, and working reliably in your production environment.

  • OpenAI API integration: GPT-4o, GPT-4 Turbo, GPT-4o mini

  • RAG pipelines connecting the model to your knowledge base and documents

  • Function calling for tool use and structured data extraction

  • Streaming responses, cost management, and production monitoring

Recent outcomes

Conversational AI · Market research

48 hrs to insights

Built a conversational AI that runs automated research interviews, delivering usable insights within 48 hours of interview completion.

AI OCR · Gas station operations

20K+ in a single day

Integrated an AI document-processing pipeline that handled 20,000+ transactions in a single day with manual errors eliminated.

4.9
on Clutch
See our work

The problem

Sound familiar?

  • Want to add AI to your product but don't know how to connect it to your data?

  • Built a ChatGPT integration that works in demo but hallucinates in production?

Short answer

RaftLabs integrates OpenAI GPT-4o, GPT-4 Turbo, and GPT-4o mini into web apps, mobile apps, and internal tools for clients across the US, UK, Europe, Canada, GCC, South Africa, and Southeast Asia. 20+ AI products shipped. Fixed cost from $20,000 before development starts.

Key takeaways

  • RaftLabs has shipped 20+ AI products in 24 months
  • Integration development is fixed cost from $20,000 before development starts
  • A conversational AI built for automated research interviews delivered usable insights within 48 hours of interview completion
  • An AI document processing pipeline handled 20,000+ transactions in a single day with manual errors eliminated
  • RAG pipelines, function calling, and streaming responses are standard integration components, not add-ons

Trusted by

Vodafone logo
Aldi logo
Nike logo
Microsoft logo
Heineken logo
Cisco logo
Calorgas logo
Energia Rewards logo
GE logo
Bank of America logo
T-Mobile logo
Valero logo
Techstars logo
East Ventures logo
TuneClub logo

The demo was flawless. Then it met real users.

The team connected the OpenAI API, wrote a system prompt, and the assistant answered every question in the pitch meeting. Then it shipped. A customer asked about a refund policy the model had never seen, and it invented one. Another asked for last quarter's numbers, and it made them up with total confidence.

Nobody had grounded the model in the company's actual data, validated a single output, or set a budget alert. The integration worked right up until it faced a question the demo never asked.

The API call is the easy 10 percent. The other 90 percent is what makes it survive contact with real users.

Integration that works in production, not just in the demo

Most ChatGPT/OpenAI integrations that fail in production share a common pattern: the team connected the API, wrote a system prompt, and shipped. No data grounding. No output validation. No cost monitoring. No handling for when the model does not know the answer.

We build the full integration, not just the API call.

According to McKinsey's State of AI 2025 report, 71% of organizations now regularly use generative AI in at least one business function, up from 65% the year before. For most of these teams, the bottleneck is not access to the OpenAI API but the engineering depth required to connect it reliably to production data and workflows.

RaftLabs has shipped 20+ AI products in 24 months, part of 100+ products since 2015 for clients including Vodafone, T-Mobile, Aldi, Nike, Cisco, and Lockheed Martin, rated 4.9/5 on Clutch. A conversational AI we built for automated research interviews delivers usable insights within 48 hours of interview completion. An AI document processing pipeline handled 20,000+ transactions in a single day with manual errors eliminated. The team that scopes your integration is the team that ships it, with no offshore handoff after the contract is signed. We scope the work, lock the cost in writing before any development starts, and scope compliance requirements (GDPR, HIPAA, SOC 2) in week 1 rather than retrofitting them before launch. We have shipped HIPAA-compliant AI systems for US healthcare clients and GDPR-compliant products for European markets.

This pays off when you have a real application and real data to ground it on.

Everything on the left should already be true for your product. Even one thing on the right, and the consumer ChatGPT product or a quick prototype is the smarter first step.

A fit
01

An existing web app, mobile app, or internal tool you want to add AI capabilities to.

02

Data the model needs to ground its answers on: documents, a knowledge base, product records, or a database.

03

You need the integration to work reliably in production, with output validation and cost monitoring, not just a demo.

Not a fit
  • You just need the ChatGPT consumer product at chat.openai.com, not the OpenAI API inside your own application.
  • There's no data to ground the model on, and general training knowledge already covers your use case.
  • You want a throwaway proof-of-concept with no production users, monitoring, or reliability requirements.

What we build

What we integrate

  • 01
    AI chat and assistants
    Conversational AI embedded in your application: support assistants grounded in your product docs, knowledge base Q&A for internal teams, and company assistants that know your policies and pricing. Retrieval over your indexed documents, using RAG on pgvector or Pinecone, means responses cite your actual content, not general training knowledge, streaming cuts the wait to under a second to first token, and out-of-scope queries escalate to a human instead of a hallucinated answer.
  • 02
    Document and content AI
    AI features that work on documents throughout their lifecycle: contract clause extraction returning structured JSON, financial report summarisation with table data preserved, plain-language rewrites of technical docs, and first-draft generation from CRM records in your brand voice. PDF extraction preserves headings and tables, and documents longer than the model's context window are processed in parallel chunks, then combined in a second pass.
  • 03
    AI for your product
    AI added to your existing SaaS product as integrated features, not a chatbot bolted onto the side: writing assistance that preserves each user's style, content generation from structured data, and background categorisation of records. Multi-tenant prompt isolation scopes brand voice per customer, per-user token tracking supports cost attribution and usage-based billing, and fallback handling keeps features graceful during downtime, all built directly on the OpenAI API.
  • 04
    Structured data extraction
    Extract typed, validated data from unstructured inputs with strict schema enforcement, using OpenAI function calling and JSON Schema and validating with Zod or Pydantic, so the model returns only the fields your schema defines, never invented ones. Every response is validated before a write, so out-of-range values are flagged for review instead of written silently, and we benchmark accuracy against a labelled test set before launch so you know the error rate to expect.
  • 05
    AI agents and tool use
    Agents that complete multi-step tasks through a loop where the model picks the next tool based on prior results, not a single API call, built on OpenAI function calling and LangGraph. Conditional branches and state persist across tool calls, borderline cases route to human review with context compiled, tool failures surface structured errors instead of hallucinated results, and token budgets prevent runaway spend. See our multi-agent systems page for complex multi-agent orchestration.
  • 06
    Cost and performance optimisation
    We reduce OpenAI API costs on existing integrations, typically by 30-60%, without degrading quality: GPT-4o mini handles high-volume focused tasks while GPT-4o is reserved for reasoning that needs the depth. Semantic caching returns stored answers for near-duplicate queries and prompt caching cuts cost and latency on long system prompts, and production monitoring tracks cost per conversation, latency, and error rates in real time.

Tell us what AI feature you want to add.

The application, the user problem you're solving, and the data you want the model to work with. We'll scope the integration and give you a fixed cost.

How it works

From scope to shipped

Every project follows the same four phases. Scope is locked and price is fixed before development starts.

  1. Week 1
    01

    Discover and scope

    We map the integration requirements: which models fit the task, what data the model needs access to, and how outputs connect to your product or workflow. You leave week 1 with a written scope and a fixed-price quote.

  2. Weeks 2-3
    02

    Design and architect

    RAG pipeline design, prompt architecture, function call schemas, and data flow before a line of production code is written. Design decisions made here cost a fraction of the same decisions made mid-build.

  3. Weeks 4-12
    03

    Build, integrate, and QA

    Working integration at a staging URL by the end of sprint one. Bi-weekly demos. Accuracy benchmarking against labelled test sets for extraction and classification tasks. QA runs in parallel with every sprint.

  4. Weeks 12+
    04

    Launch and monitor

    Production deployment with cost monitoring, latency tracking, and error rate dashboards active on launch day. 8 weeks of post-launch support included in every project.

What clients say

What our clients say

Three-year average engagement. Founders and operators describing the work in their own words. No marketing varnish.

Amer Abu Khajil
Amer Abu Khajil
Canada flagCanada
Founder, Peak Studios & Perceptional

I found RaftLabs to be the perfect partner for Perceptional, with their expertise in helping startup founders build MVPs, a free consultation, a prototype that matched my vision, and their unwavering support.

01 / 02

Fixed cost, scoped before development starts.

Integration development is a fixed cost from $20,000, modelled at your expected monthly volume before you commit. Tell us the application, the data, and the outcome, and we'll scope it.

Stay on topic

More on AI chatbots

Frequently asked questions

ChatGPT is OpenAI's consumer product, a chat interface anyone can use at chat.openai.com. The OpenAI API is the programmatic interface that lets you integrate GPT-4o and other models into your own applications. When businesses say they want to 'integrate ChatGPT', they mean they want OpenAI API integration, the same underlying models, but integrated into their specific product, workflow, or data environment with custom prompts, data connections, and output formats.

GPT-4o: the flagship model, best for complex reasoning, analysis, and nuanced tasks. Higher cost per token. GPT-4o mini: significantly cheaper, surprisingly capable on focused tasks, the right choice for high-volume production use cases where cost compounds. GPT-4 Turbo: large context window (128K tokens), good for long document analysis. o1 and o3 reasoning models: for tasks requiring multi-step logical reasoning. We recommend the right model for each specific task, not the most expensive one as default.

Retrieval-augmented generation (RAG). Your documents, product knowledge, or database content are indexed into a vector store (Pinecone, Weaviate, or pgvector in PostgreSQL). When a user asks a question, we retrieve the relevant content from your index and include it in the model's context. The model answers based on your specific data rather than general training knowledge. This prevents hallucination on company-specific topics and grounds responses in accurate, current information.

OpenAI function calling lets the model trigger specific actions or return structured data rather than free-form text. Use cases: returning structured JSON for your application to process (extract specific fields from a user message), triggering actions in your system (creating a support ticket, looking up an order, updating a CRM record), and building AI agents that use tools to accomplish multi-step tasks. Function calling is how you make AI integrations that do things, not just say things.

Hallucination prevention strategy: RAG grounds responses in your actual data. System prompts constrain the model to answer only from provided context. Confidence handling, prompting the model to say when it does not know rather than guess. Output validation for structured outputs (checking that returned JSON matches expected schema). Human-in-the-loop review for high-stakes outputs. Monitoring and logging for hallucination patterns identified in production. No approach eliminates hallucination entirely, the goal is making it detectable and handleable.

Integration development costs $20,000-$80,000 depending on complexity, a single AI feature in an existing application runs less; a full AI product with RAG, function calling, and multiple AI workflows runs more. Ongoing OpenAI API costs scale with usage, GPT-4o at $5/1M input tokens and $15/1M output tokens, GPT-4o mini at $0.15/$0.60 per 1M tokens. We model the expected monthly API cost at your estimated volume before committing to the build.

Work with us

Tell us what you need. We'll tell you what it would take.

We scope ChatGPT Integration Services in 30 minutes. You walk away with a clear cost, timeline, and approach. No commitment required.

  • Scope and cost agreed before work starts. No surprises. No obligation.
  • Working prototype within 3 weeks of kickoff.
  • Pay by milestone. You see progress before each invoice.
  • 60-day post-launch warranty. Bug fixes, UI tweaks, and deployment support. No retainer.
  • All conversations are NDA-protected.