3 Apr 20204 min read
5 Reasons to Use Mautic for Your Marketing Automation Needs
Amit GuptaRead more
Plug-in & Integrations · Outlook Add-in Development
Custom Outlook add-ins for enterprise productivity.
Custom Microsoft Outlook add-ins built on Office JS. Classify emails, integrate CRM data, automate meeting scheduling, and enhance enterprise cybersecurity right from the inbox. As a leading Outlook add-in development company, we specialize in custom Outlook add-in development tailored to your unique business logic.
CRM integration tools
Phishing reporting add-ins
Email classification
AppSource certification
Event-based automation
5M+
Emails processed
Secure add-ins operating at enterprise scale globally.
1-Click
CRM Synchronization
Seamlessly pushing email threads and contacts to Salesforce or HubSpot.
100%
Security compliant
Passing strict infosec reviews for financial and healthcare clients.
1st
Pass AppSource
Engineered to pass Microsoft certification immediately.
Why MetaDesign
Outlook add-in developers who understand security.
From CRM sync to phishing detection—we build inbox tools that pass IT security reviews.
01
Seamless CRM Integration
We build two-way integrations that allow sales and support teams to view, create, and update CRM records based on the email they are currently reading. hire Outlook add-in developers to build enterprise Outlook add-ins that scale securely.
02
Cybersecurity & Compliance
Expertise in building email classification, phishing reporting, and secure encryption add-ins that integrate with your corporate security infrastructure. Accelerate this with our Outlook add-in development services.
03
Event-Based Activation
We leverage Outlook's event-based activation to run code automatically when a user composes an email, adds an attachment, or schedules a meeting.
Sales Productivity
Instantly view a sender's CRM history, log the email thread, and create follow-up tasks without leaving Outlook. Streamline this end-to-end with our Outlook plugin development experts.
Threat Reporting
Provide employees with a single-click button to report suspicious emails to your SOC for automated analysis. When you hire Outlook add-in developers, you ensure your project is built to the highest enterprise standards.
Data Classification
Force users to apply sensitivity labels (e.g., Internal, Confidential) before an email can be sent.
Meeting Automation
Inject custom video conferencing links or meeting agendas directly into the calendar invite automatically.
Our approach
Five stages, paired end-to-end.
Predictable delivery. No black-box sprints.
01
Analyse
Map your email workflows, security requirements, and third-party API integrations. As your dedicated Outlook add-in development company, we prioritize performance and scalability from day one.
02
Design
Design context-aware task panes that adapt whether the user is reading or composing an email. We achieve this through our comprehensive Outlook add-in development services, minimizing technical debt.
03
Build
Develop using Office JS, implementing secure Graph API or custom REST integrations. Our architects design a custom Outlook add-in development blueprint tailored specifically to your ecosystem.
04
Test
Rigorous testing across Outlook for Windows, Mac, iOS, Android, and Web.
05
Deploy
Enterprise rollout via Microsoft 365 Admin Center or AppSource publishing.
Customer value
Why enterprises choose our Outlook add-in services.
Tangible outcomes from automating email workflows.
CRM Synchronization
Eliminate context switching by bringing your CRM directly into the Outlook reading pane.
Enhanced Security
Protect corporate data with custom classification, encryption, and threat reporting tools.
Works Everywhere
Ensure your tools are available to users on Windows, Mac, Web, iOS, and Android.
Accelerate Sales
Empower sales teams to insert templates, track opens, and log activities with one click.
Automated Actions
Trigger complex background workflows the moment an email is composed or a meeting is scheduled.
Easy Deployment
Deploy globally via the Microsoft 365 Admin Center with no local installation required.
By the numbers
400+
Engineers worldwide
200+
Active clients
20yr
Pure-play software
94%
Client retention
Engagement models
Three ways to work with our Outlook Add-in Development 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.
Yes, modern Office JS add-ins can be configured to work on Outlook for iOS and Android, in addition to Windows, Mac, and the web.
Yes, with the appropriate permissions, the add-in can read the sender, recipients, subject, body, and attachments to process data or sync with a CRM.
Yes, using Outlook's event-based activation (ItemSend event), we can validate the email content and block it from sending if it violates compliance rules.
Extremely secure. The add-in operates in a sandboxed environment, uses Azure AD for authentication, and communicates only via secure, encrypted API endpoints.
We configure the manifest for `OnMessageSend` events. When a user clicks send, the add-in executes a background script to scan the body and attachments for PII, allowing us to block the email if a policy violation is detected.
Yes, we build add-ins that allow users to report suspicious emails with one click. The add-in automatically extracts the email headers, body, and attachments, securely forwarding them to your Security Operations Center via API.
Using Event-Based Activation, we intercept the send event and display a custom dialog box forcing the user to select a classification label (e.g., Internal, Confidential). The email will not send until a valid selection is made.
Office JS runs in an isolated, sandboxed browser control. It cannot execute local executables, read the local file system, or arbitrarily access mailboxes outside of the currently selected message or configured Graph API permissions.
Yes. We utilize the `OnNewMessageCompose` event to trigger a background script that fetches the user's latest title and phone number from Azure AD (via Graph API) and injects a formatted HTML signature directly into the body.
Because modern add-ins are web-based, true offline functionality is limited. However, we utilize HTML5 LocalStorage and IndexedDB to cache critical settings and data, ensuring the UI remains responsive during spotty connections.
Build an Outlook add-in that streamlines your inbox.
Tell us about your project. We'll come back with a plan, a timeline, and the right team — no obligations.