You will get Outlook add-ins for Office 365, desktop and VSTO
Top Rated

Project details
I specialize in developing custom Office add-in plugins for Outlook, Word, PowerPoint, Excel, and OneNote tailored to your specific needs. I offer both web and desktop add-ins, along with seamless integration of Outlook with APIs and databases. As a Microsoft add-in expert, I'm here to assist you in creating a plugin that meets your requirements.
Specialization in ChatGPT/OpenAI API Integration
Technologies:
Front-end:
• HTML
• CSS
• JavaScript
• React
• Angular
• Vue
• Bootstrap
• Tailwind
• jQuery
Back-end:
• Node.js
• Express.js
• .NET Core
Database:
• MSSQL
• MySQL
• MongoDB
Integrations:
• OpenAI API like ChatGPT
• REST APIs
• Microsoft Graph API
• Other third-party APIs like Mailtrap
**Keywords:**
Office add-in, Outlook add-in, outlook 365 plugin, outlook web adding, outlook-addons, VSTO office add-ins, office js adding, Excel add-in, PowerPoint add-in, Word addin, OneNote addin, OpenAI, ChatGPT
Specialization in ChatGPT/OpenAI API Integration
Technologies:
Front-end:
• HTML
• CSS
• JavaScript
• React
• Angular
• Vue
• Bootstrap
• Tailwind
• jQuery
Back-end:
• Node.js
• Express.js
• .NET Core
Database:
• MSSQL
• MySQL
• MongoDB
Integrations:
• OpenAI API like ChatGPT
• REST APIs
• Microsoft Graph API
• Other third-party APIs like Mailtrap
**Keywords:**
Office add-in, Outlook add-in, outlook 365 plugin, outlook web adding, outlook-addons, VSTO office add-ins, office js adding, Excel add-in, PowerPoint add-in, Word addin, OneNote addin, OpenAI, ChatGPT
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, PSD to HTML, SecurityWhat's included $250
These options are included with the project scope.
$250
- Delivery Time 3 days
- Number of Revisions 3
- Number of Pages 2
- Design Customization
- Content Upload
- Responsive Design
- Source Code
23 reviews
(22)
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(1)
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(0)
MF
Max F.
Dec 19, 2024
Willing to go the extra mile, and great communication
MF
Max F.
Dec 6, 2024
Brilliant! Great communicator, technically proficient and fast. Rehired him for other projects immediately :)
SH
Sergei H.
Mar 31, 2026
Excel Plugin Development with AI Reviewer Comments Feature
UL
UPRIGHT L.
Mar 30, 2026
Experience with Outlook Add-ins
Very good developer
CF
Christian F.
Mar 17, 2026
Software Developer for Microsoft Word Plug-in (AI Drafter)
BC
Bruce C.
Mar 9, 2026
Develop Custom Web-Based Outlook Add-in with Azure Function Integration – Phase 1
MP
Martin P.
Nov 11, 2025
Link Preview Outlook Add In on Mac
Very smart and talented, highly recommend!!!!
About Zia Ul
Microsoft 365 Add-ins | Outlook, Excel & Word | Office.js | Graph API
96%
Job Success
Sargodha, Pakistan - 10:05 am local time
I am a specialist Microsoft 365 Add-in Developer with 4+ years focused exclusively on Office.js, VSTO, and Google Workspace Add-ons. I do not build generic web apps; every project I take is an Office or Workspace automation solution built for real business workflows.
✦ Outlook Add-in Development
AI email summaries, auto-replies, and priority tagging CRM sync with Salesforce, HubSpot, and Dynamics 365 phishing detection and compliance tools, calendar automation and scheduling assistants, all built with Office.js and VSTO, production-ready and enterprise-compliant.
✦ Excel Add-in Development
Live API data sync, automated dashboards, custom Office.js functions, AI-powered analysis, and enterprise Excel automation for both Web and Desktop, replacing slow manual workflows with reliable, scalable solutions.
✦ Word Add-in Development
Automated document generation, contract and proposal assembly, AI proofreading, redlining and approval workflows, and compliance enforcement, turning Word into a document automation engine.
✦ PowerPoint Add-in Development
Data-driven slide generation, brand and template enforcement, automated investor decks and sales presentations built with Office.js for Web and Desktop.
✦ Google Workspace Add-on Development
Gmail automation and email parsing, Google Sheets custom sidebars and dashboards, Docs content automation, and secure internal workflow tools built with Google Apps Script and modern APIs.
✦ Microsoft Graph API & M365 Integration
Cross-app workflows connecting Excel, Outlook, Word, SharePoint, and Teams Microsoft Graph API integrations, SSO authentication with MSAL, Azure AD, centralized deployment, and AppSource-ready add-in packaging.
✦ Tech Stack
Office.js · VSTO · Microsoft Graph API · React · TypeScript · Fluent UI · Node.js · .NET Core · Azure · OpenAI API · Google Workspace APIs · Salesforce API · REST APIs
Steps for completing your project
After purchasing the project, send requirements so Zia Ul can start the project.
Delivery time starts when Zia Ul receives requirements from you.
Zia Ul works on your project following the steps below.
Revisions may occur after the delivery date.
Client purchases the project and sends requirements.




