Plug-in & Integrations · Microsoft Copilot Extensions

Empower your team with Custom Copilot Extensions.

Extend Microsoft 365 Copilot with custom enterprise data. We build secure, compliant Copilot extensions that let AI interact with your internal APIs, databases, and proprietary systems.

Copilot custom plugins

Graph API integration

Teams AI extensions

Message Extensions

Declarative Copilots

10x

Faster workflows

AI-driven task completion.

100%

Secure

Enterprise data compliance.

M365

Native

Runs inside Word, Excel, Teams.

Custom

LLMs

Bring your own models.

Trusted by enterprises worldwideCMMi Level 3ISO 27001SOC 220+ Years

Why MetaDesign

Copilot Extension Experts

We integrate your proprietary data with Microsofts AI.

Enterprise AI Integration

Connect your secure data to Copilot without compromising compliance or data boundaries.

Zero Trust Architecture

Extensive Graph API scopes ensure AI only sees what the user is authorized to see.

Rapid Prototyping

From idea to working Teams Copilot bot in weeks, not months.

Enterprise Search

Query internal databases directly from Copilot prompt.

Legal Drafting

Copilot drafting contracts using proprietary firm templates.

Financial Summaries

Summarizing live ERP data inside Teams.

IT Helpdesk

Automated ticket resolution via Teams Copilot.

Our approach

Five stages, paired end-to-end.

Predictable delivery. No black-box sprints.

Map

Identify high-ROI workflows for Generative AI automation.

Design

Design prompts, message extensions, and Adaptive Cards.

Build

Develop using Teams Toolkit and Bot Framework.

Test

Validate LLM responses for accuracy and hallucinations.

Deploy

Publish via Microsoft 365 Admin Center.

Customer value

Why build a Copilot Extension?

Unlock the full potential of Generative AI in M365.

Productivity

Automate tasks inside Word, Excel, and Teams without switching apps.

Contextual AI

Give Copilot the specific context of your business.

Secure

Leverage Microsofts enterprise-grade security.

ROI

Massive time savings across all departments.

Technology

Tools our microsoft copilot extensions developers ship with.

We use what works. No vendor lock-in.

Teams ToolkitBot FrameworkGraph APIAdaptive CardsNode.js ReactTypeScriptC#OpenAIAzure OpenAISemantic Kernel

By the numbers

400+

Engineers worldwide

200+

Active clients

20yr

Pure-play software

94%

Client retention

Engagement models

Three ways to work with our Microsoft Copilot Extensions team.

Scale up, scale down — zero procurement headaches.

Fixed-scope project

Start-to-finish delivery with total cost, timeline, and scope agreed upfront. Best for well-defined builds and launches.

BEST FORNew product launches

Dedicated team

A ring-fenced squad — PM, tech lead, engineers, QA — fully managed by us, embedded in your workflow.

BEST FORLong-running platforms

Staff augmentation

Plug senior engineers into your existing team and tools. You manage priorities, we deliver results.

BEST FORCapacity gaps & sprints

FAQ

Asked first, every time.

Don't see yours here? Send us the question — a principal engineer will reply within 24 hours.

What is a Microsoft 365 Copilot Extension?

A Copilot Extension allows you to bring your external data, APIs, and business logic directly into the Copilot chat experience in Teams, Word, and Excel — enabling AI-powered workflows with your proprietary enterprise data.

Is our corporate data safe with Copilot Extensions?

Yes. Microsoft Copilot respects all existing Microsoft 365 tenant boundaries and permissions. Your data is not used to train foundational models, and we implement Zero Trust architecture with granular Graph API scopes.

How long does it take to build a custom Copilot Extension?

A typical Copilot plugin MVP takes 4 to 8 weeks depending on complexity. Simple declarative copilots can be ready in 2 weeks, while full custom extensions with API connectors and Adaptive Cards may take longer.

What is the difference between a Declarative Copilot and a Custom Engine Agent?

A Declarative Copilot uses Microsoft's own LLM with your instructions and data sources. A Custom Engine Agent lets you bring your own model (e.g., Azure OpenAI GPT-4o) for full control over reasoning. We help you choose based on your compliance and cost requirements.

Can Copilot Extensions access our internal databases and APIs?

Yes. We build secure API plugins and message extensions that allow Copilot to query your CRM, ERP, HRIS, or any REST API — all within the Microsoft 365 security boundary using Graph API connectors and Azure AD authentication.

Do you handle deployment and admin center publishing?

End to end. We handle Teams Toolkit development, testing, Microsoft 365 Admin Center publishing, and user rollout. We also prepare documentation for your IT team's app governance review.

Can Copilot Extensions work in Teams, Word, and Excel simultaneously?

Yes. A well-architected Copilot extension surfaces as a message extension in Teams and can be invoked contextually in Word, Excel, and PowerPoint — providing consistent AI assistance across all M365 applications.

What is the cost model for Copilot Extension development?

We offer fixed-price and dedicated-team engagement models. Costs depend on the number of data sources, complexity of the AI logic, and Adaptive Card UI requirements. Microsoft 365 Copilot licensing is a separate prerequisite managed by your IT team.

Ready to build your Copilot extension?

Tell us about your project. We'll come back with a plan, a timeline, and the right team — no obligations.

Book a Call