ChatGPT App Development Company

ChatGPT App Development Company

As a ChatGPT app development company, we have 100+ qualified specialists to integrate AI innovations like ChatGPT-based capabilities into your software solutions.

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Why Businesses Choose ChatGPT Development Services

What is ChatGPT?

ChatGPT app development is the process of designing, building, and integrating applications that use OpenAI’s GPT models to understand user input, generate responses, automate tasks, retrieve information, and support conversational or AI-powered workflows. It can include custom chatbots, virtual assistants, AI copilots, customer support tools, knowledge-base assistants, and GPT-powered features embedded into web, mobile, or enterprise applications.

  • Why Businesses Choose ChatGPT Development Services

    ChatGPT-powered applications can handle routine questions, guide users through common issues, retrieve relevant information, and support self-service around the clock. This reduces pressure on support teams while helping customers get answers faster.

  • Lower Operational Costs

    Businesses can automate repetitive conversations and workflow steps that would otherwise require manual effort. ChatGPT development services help reduce the cost of handling high-volume requests across support, sales, operations, and internal service teams.

  • 24/7 Availability

    AI-powered assistants can support customers, employees, and partners outside normal business hours. This is especially valuable for global companies that need consistent service across multiple regions and time zones.

  • New In-Chat Customer Experiences

    Apps built for ChatGPT can give customers access to business services directly within the ChatGPT interface. Through MCP integrations and interactive UI components, users can search, compare, book, configure, or complete other supported tasks without moving through a traditional application flow.

  • Multilingual Communication

    ChatGPT-powered applications can support users across multiple languages from a single conversational interface. This can help global organizations improve accessibility and reduce the effort required to maintain separate support experiences for each market.

Our Services

AI-Based Solutions to Boost Your Business: ChatGPT as a Service

AI technologies allow for solving complex problems, automating business processes, and speeding up decision-making. A wide range of industries has already benefited from artificial intelligence. AI and ChatGPT app development can boost your business, enable problem-solving capabilities, and increase customer satisfaction.

  • MCP Server Development

    We build MCP servers that connect ChatGPT with your APIs, databases, internal platforms, and third-party systems. Our team defines the tools, resources, permissions, and data flows needed for secure, reliable interactions while keeping business logic and sensitive operations under your control.

  • Interactive UI Component Development

    We create interactive components that make ChatGPT apps more useful than text-only experiences. These can include forms, product selectors, comparison interfaces, dashboards, booking flows, tables, cards, and structured results that help users complete tasks directly within the conversation.

  • API and Tool Integration

    We integrate ChatGPT with the APIs and tools required to perform real business actions. Depending on the use case, your app can search product catalogs, retrieve customer or account data, create records, trigger workflows, check availability, generate reports, or interact with existing enterprise systems.

  • Authentication and Access Control

    We implement authentication and authorization for ChatGPT apps that work with private or user-specific data. This can include account linking, role-based access, permission checks, secure token handling, and controls that ensure users only access the data and actions they are authorized to use.

  • App Testing and Optimization

    We test how the app behaves across different prompts, workflows, edge cases, and failure scenarios. Our engineers optimize tool selection, response accuracy, latency, error handling, API reliability, and UI behavior to create a smoother and more predictable ChatGPT app experience.

  • ChatGPT Directory Submission Support

    We help prepare your app for submission to the ChatGPT app directory, including technical validation, metadata preparation, configuration review, testing, and compliance checks. We also help identify potential issues before submission to reduce unnecessary revisions during the review process.

  • Ongoing Maintenance and Expansion

    We support ChatGPT apps after launch as APIs, business requirements, and platform capabilities evolve. Our team can add new tools and workflows, update MCP integrations, expand UI components, monitor reliability, improve performance, and continuously extend the app as new use cases emerge.

What You Get

ChatGPT App Development Services We Offer

01

Custom ChatGPT Development

We offer custom ChatGPT app development to fit your goals and requirements and meet your customers’ expectations. Our team focuses on your unique project needs.

02

ChatGPT API Integration

At Devox Software, we are focused on integrating ChatGPT into your websites or mobile apps. Save time and money with human-like chatbots that work 24/7.

03

ChatGPT Consulting

Boost your business with ChatGPT capabilities and functionality. Our team will analyze your business needs and requirements and offer custom ChatGPT software development solutions.

04

OpenAI App Development

We build custom applications powered by OpenAI models for customer-facing and internal business use cases. Our team handles solution architecture, model integration, prompt and tool orchestration, RAG pipelines, API connections, security, testing, and deployment. From AI assistants and copilots to workflow automation and knowledge systems, we develop OpenAI applications that integrate with your existing software and support real business processes.

Our Vision

We’ve worked extensively in terms of geography and sector, developing a variety of work — products, services, and experiences — that has taught us that a well-defined visual strategy is key to bring visibility, credibility, and funds to any organisation. Starting in 2018, we decided to plant a tree for each client that we work with.

70

+

Successfully completed projects

71

%

Devox Software annual growth

100

+

Tech specialists on board

82

%

Clients with us for more than 2 years

Case Studies

Our Latest Works

View All Case Studies
Humanising Autonomy: Behavioral AI SDK for Humanized Driver Assistance Systems (HDAS) Humanising Autonomy: Behavioral AI SDK for Humanized Driver Assistance Systems (HDAS)
  • AUTONOMOUS DRIVING
  • C++ DEVELOPMENT
  • COMPUTER VISION
  • AI OPTIMIZATION
  • ETHICAL AI

Humanising Autonomy: Behavioral AI SDK for Humanized Driver Assistance Systems (HDAS)

A computer vision SDK for predicting road user behavior and enhancing driver safety.

Additional Info

Core Tech:
  • C++
  • OpenCV
  • CUDA
  • Github Actions
  • Cmake
  • Conan
  • TensorRT
  • ONNX
  • Ambarella
Country:

United Kingdom United Kingdom

ActivePlace ActivePlace
  • health
  • fitness
  • marketplace

ActivePlace: Wellness-Focused Social Marketplace Platform

A wellness-focused social media and marketplace platform for active lifestyle communities.

Additional Info

Core Tech:
  • Jenkins
  • Angular
  • Ruby
  • Figma
Country:

Australia Australia

Social Media Screening Platform Social Media Screening Platform
  • Backend
  • Frontend
  • Cloud Services
  • DevOps & Infrastructure

AI-Powered Social Media Background Check Platform for Risk-Free Hiring

An AI-driven platform for HR teams to automate social media background checks and mitigate hiring risks.

Additional Info

Core Tech:
  • .NET Core
  • Angular
  • Azure
  • Docker
  • GitLab CI/CD
  • Selenium Web Driver
Country:

USA USA

Trusted by

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Awards & Certifications

Industry Contribution Awards & Certifications

Check Devox Software’s awards on rating and review platforms, recognized among the top software development companies, along with the certifications our team members hold.

  • Awards
  • Certifications
  • UpWork

    UpWork

  • Clutch

    Clutch

  • The Manifest

    The Manifest

  • DesignRush

    DesignRush

  • MC.today

    MC.today

  • Clutch

    Clutch

  • Clutch

    Clutch

  • AppFutura

    AppFutura

  • Clutch

    Clutch

  • GoodFirms

    GoodFirms

  • DesignRush

    DesignRush

  • UpWork

    UpWork

  • Professional Scrum Master™ II (PSM II)

    Professional Scrum Master™ II (PSM II)

  • Professional Scrum Product Owner™ I (PSPO I)

    Professional Scrum Product Owner™ I (PSPO I)

  • Microsoft Certified: DevOps Engineer Expert

    Microsoft Certified: DevOps Engineer Expert

  • Quality Assurance ISTQB Foundation Level

    Quality Assurance ISTQB Foundation Level

  • Java Development Certified Professional

    Java Development Certified Professional

  • Certified Artificial Intelligence Scientist (CAIS)

    Certified Artificial Intelligence Scientist (CAIS)

  • Oracle Database SQL Certified Associate

    Oracle Database SQL Certified Associate

  • ITSMS Auditor/Lead Auditor of ISO Standard 20000

    ITSMS Auditor/Lead Auditor of ISO Standard 20000

  • Microsoft Certified: Azure Fundamentals (AZ 900)

    Microsoft Certified: Azure Fundamentals (AZ 900)

  • Claude Certified Developer - Foundations (CCDV-F)

    Claude Certified Developer - Foundations (CCDV-F)

  • Cisco CCNA certification

    Cisco CCNA certification

  • PL-400: Power Platform Developer Associate

    PL-400: Power Platform Developer Associate

  • Claude Certified Partner

    Claude Certified Partner

  • Certified Kubernetes Application Developer (CKAD)

    Certified Kubernetes Application Developer (CKAD)

Testimonials

Testimonials

Carl-Fredrik Linné                                            Sweden

The solutions they’re providing is helping our business run more smoothly. We’ve been able to make quick developments with them, meeting our product vision within the timeline we set up. Listen to them because they can give strong advice about how to build good products.

Darrin Lipscomb Darrin Lipscomb
Darrin Lipscomb United States

We are a software startup and using Devox allowed us to get an MVP to market faster and less cost than trying to build and fund an R&D team initially. Communication was excellent with Devox. This is a top notch firm.

Daniel Bertuccio Daniel Bertuccio
Daniel Bertuccio Australia

Their level of understanding, detail, and work ethic was great. We had 2 designers, 2 developers, PM and QA specialist. I am extremely satisfied with the end deliverables. Devox Software was always on time during the process.

Trent Allan Trent Allan
Trent Allan Australia

We get great satisfaction working with them. They help us produce a product we’re happy with as co-founders. The feedback we got from customers was really great, too. Customers get what we do and we feel like we’re really reaching our target market.

Andy Morrey                                            United Kingdom

I’m blown up with the level of professionalism that’s been shown, as well as the welcoming nature and the social aspects. Devox Software is really on the ball technically.

Vadim Ivanenko Vadim Ivanenko
Vadim Ivanenko Switzerland

Great job! We met the deadlines and brought happiness to our customers. Communication was perfect. Quick response. No problems with anything during the project. Their experienced team and perfect communication offer the best mix of quality and rates.

Jason Leffakis Jason Leffakis
Jason Leffakis United States

The project continues to be a success. As an early-stage company, we're continuously iterating to find product success. Devox has been quick and effective at iterating alongside us. I'm happy with the team, their responsiveness, and their output.

John Boman John Boman
John Boman Sweden

We hired the Devox team for a complicated (unusual interaction) UX/UI assignment. The team managed the project well both for initial time estimates and also weekly follow-ups throughout delivery. Overall, efficient work with a nice professional team.

Tamas Pataky Tamas Pataky
Tamas Pataky Canada

Their intuition about the product and their willingness to try new approaches and show them to our team as alternatives to our set course were impressive. The Devox team makes it incredibly easy to work with, and their ability to manage our team and set expectations was outstanding.

Stan Sadokov Stan Sadokov
Stan Sadokov Estonia

Devox is a team of exepctional talent and responsible executives. All of the talent we outstaffed from the company were experts in their fields and delivered quality work. They also take full ownership to what they deliver to you. If you work with Devox you will get actual results and you can rest assured that the result will procude value.

Mark Lamb Mark Lamb
Mark Lamb United Kingdom

The work that the team has done on our project has been nothing short of incredible – it has surpassed all expectations I had and really is something I could only have dreamt of finding. Team is hard working, dedicated, personable and passionate. I have worked with people literally all over the world both in business and as freelancer, and people from Devox Software are 1 in a million.

Insights

Our Experts' Insights

PWA vs Native: Which Approach to Choose?

Back End & Front End Developer Salary Trends In 2021 [Market Research]

Top Dedicated Development Team Providers in 2026

Questions

Questions You May Have

  • What does a ChatGPT app development company do?

    A ChatGPT app development company builds software that uses OpenAI’s models to answer questions, automate tasks, or take actions for your users or employees. Typical projects are customer-support assistants, internal knowledge assistants, AI features inside existing products, and apps that run directly inside ChatGPT. The work covers the whole build: architecture, connecting the AI to your data and systems, safety testing, deployment, and ongoing monitoring of quality and cost.

  • How long does it take to build a ChatGPT app?

    A working proof of concept usually takes 2–4 weeks, and a production-ready application 2–4 months. The proof of concept runs on your real data and use cases, so you can see answer quality before committing to the full build. Timelines depend mostly on how many systems the app connects to and how clean your source data is.

  • Can you build an app that runs inside ChatGPT?

    Yes. With OpenAI’s Apps SDK, built on the Model Context Protocol (MCP), businesses can build apps that users open and use directly in their ChatGPT conversations. We build the MCP server that connects ChatGPT to your product’s data and actions, design the in-chat interface, handle authentication, and prepare the app for OpenAI’s review and listing. It’s a new channel to reach ChatGPT’s users where they already are.

  • Can you add ChatGPT to our existing website, mobile app, or software?

    Yes. OpenAI provides official SDKs for Python, JavaScript/TypeScript, .NET, Java, and Go, so we can integrate its models into almost any stack, including web apps, iOS and Android apps, internal tools, and enterprise systems. We also build chat widgets and add assistants to Slack, Microsoft Teams, WhatsApp, and other messaging channels.

  • Can you create custom chatbots with ChatGPT?

    Yes. We start by defining what the bot should answer, do, and hand off. It’s required to define the scope of the bot’s capabilities, e.g., questions it can answer, tasks it can perform, and interactions it can handle. It’s also necessary to provide training data to the model, which can be done through techniques such as fine-tuning or transfer learning.

  • How does ChatGPT handle different languages and dialects in chatbot development?

    ChatGPT is trained on a diverse dataset that includes multiple languages and dialects, enabling it to understand and respond in various languages. It can detect the language used in the user’s input and reply in the same language. For dialects and regional variations, ChatGPT’s performance may vary based on the representation of such dialects in its training data.

  • What are the primary programming languages and frameworks supported by ChatGPT for integration?

    ChatGPT is designed to be highly flexible and can be integrated into various programming environments. The primary languages for integration include Python, JavaScript, and Java, catering to a wide range of development needs. Frameworks like Node.js for JavaScript, Flask and Django for Python, and Spring for Java are commonly used for seamless integration. This flexibility allows developers to integrate ChatGPT into existing projects or start new ones in the environment they are most comfortable with.

  • What are the limitations of ChatGPT in app development, and how can they be addressed?

    While ChatGPT is a powerful tool, it does have limitations, such as sometimes generating verbose or irrelevant responses, and a lack of understanding of context outside its training data. To address these issues, developers can fine-tune ChatGPT with specific data relevant to their application, and implement fallback mechanisms where human intervention is possible in complex scenarios. Regular updates and monitoring can also help in maintaining the chatbot’s performance.

  • Can ChatGPT be used for multilingual chatbot development?

    Yes, ChatGPT is capable of understanding and generating text in multiple languages, making it an excellent choice for multilingual chatbot development. This feature allows businesses to cater to a diverse user base, breaking language barriers and expanding their market reach. The ability to train ChatGPT on specific languages and dialects further enhances its effectiveness in providing accurate and culturally relevant responses.

  • What's the difference between a custom GPT, an app in ChatGPT, and an OpenAI API integration?

    Compare this:

    Option What it is Best for
    Custom GPT A configured version of ChatGPT with your instructions and files, built without code Quick internal tools and simple assistants
    App in ChatGPT Your product’s functions available inside ChatGPT via the Apps SDK Reaching ChatGPT users and letting them take actions with your service
    OpenAI API integration OpenAI models built into your own website, app, or internal systems Full control over UX, data, security, and branding

    Many companies combine them, for example, an API-powered assistant on their website plus an app in ChatGPT.

  • Can a ChatGPT app answer questions using our company's data?

    Yes. We use retrieval-augmented generation (RAG): your documents, knowledge base, product data, or database records are indexed, and the most relevant pieces are retrieved and given to the model with each question. The assistant answers from your up-to-date information, can cite its sources, and respects user permissions. Your data isn’t used to retrain the model.

  • Do we need to fine-tune the model?

    Usually not. For most business assistants, RAG plus careful prompt and instruction design gives better, more controllable results than fine-tuning, and your content stays easy to update. We recommend fine-tuning only for narrow cases, such as a strict output format, a very specific writing style, or reducing cost and latency at high volume. Even then, we test whether it actually improves results first.

  • Is our data safe? Will OpenAI use it to train its models?

    By default, OpenAI doesn’t use data sent through its API to train its models. For stricter needs, options include zero-data-retention agreements (for eligible use cases) and Azure OpenAI, which runs models in the Azure region you choose. We also:

    • remove or mask personal data before it reaches the model
    • enforce role-based access
    • log activity for audits
    • keep secrets and credentials out of prompts
  • Can a ChatGPT app take actions, not just answer questions?

    Yes. With tool calling, the assistant can act in your systems: create a support ticket, check an order status, book an appointment, update a CRM record, or draft a document for approval. We connect it to tools such as Zendesk, HubSpot, Salesforce, and your own APIs. Sensitive actions (refunds, payments, account changes) require confirmation or human approval, and every action is logged.

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