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Custom Extension Development

Private CRM widgets and Marketplace-style extensions: custom buttons, related lists, Deluge functions, and embedded apps.

Book a call What you get
  • Bilateral NDA protected
  • 100% client code & IP ownership
  • 2–4 week agile sprints
Custom Extension Development

Custom Extension Development: key facts

What it is
Insyrge builds private CRM extensions and marketplace-style extensions, such as widgets, buttons, related lists, functions and embedded apps, that add features your CRM does not offer out of the box.
Who it is for
CRM users who need a feature their platform does not provide; Businesses that want a private extension for their own team.
Main deliverables
Extension specification, Widgets and UI components, Server-side functions, Third-party connections, Marketplace packaging.
Works with
CRM extension frameworks and APIs, third-party APIs, webhooks and OAuth.
How it starts
A free 45-minute discovery call, then a written scope agreed before any build starts.
Ownership
You own the code, configuration and documentation. Ongoing support is optional.

Overview

How we approach Custom Extension Development

Private CRM widgets and Marketplace-style extensions: custom buttons, related lists, Deluge functions, and embedded apps. Insyrge already publishes Zoho Marketplace extensions such as HOVER Integration, Timeline Pro, and Google Address Autocomplete, so we build to marketplace review standards from day one.

Who it is for

CRM users who need custom widgets, buttons, functions or integrations that the standard product does not provide.

Who it is for and the problems it solves

Who it is for

  • CRM users who need a feature their platform does not provide
  • Businesses that want a private extension for their own team
  • Software companies that want an extension listed on a CRM marketplace

Problems it solves

  • Staff switch between the CRM and other tools to finish one task
  • A missing feature forces manual workarounds
  • External data is not visible on CRM records
  • Existing extensions do not fit your process

What you get

Tested deliverables, included in this service

Clear milestones agreed in writing, with the code and configuration handed over to you.

  • 01

    Build custom extensions tailored to your business needs

  • 02

    Integrate third-party platforms using APIs and webhooks

  • 03

    Develop custom widgets and UI components

  • 04

    Automate complex workflows and processes

  • 05

    Centralize data across multiple systems

  • 06

    Improve system usability and team productivity

  • 07

    Scalable, secure, and performance-driven solutions

What each deliverable includes

Extension specification
Where it appears, what it does, data it reads and writes, and permissions.
Widgets and UI components
Buttons, panels and embedded views inside the CRM.
Server-side functions
Logic and API calls behind the interface.
Third-party connections
External services connected through APIs and webhooks.
Marketplace packaging
Listing assets and review preparation, where applicable.
Documentation
Admin guide, user guide and source code.

The process

How an engagement runs

Scope and deliverables are agreed before any build starts.

  1. Step 01

    Discovery

    We review your goals, current setup and the tools involved.

  2. Step 02

    Plan

    Scope, deliverables and timeline agreed in writing before work starts.

  3. Step 03

    Build and test

    Extensions are built to marketplace review standards, checked against real scenarios.

  4. Step 04

    Handover

    Documentation and installation support.

Typical timeline and what you receive at each phase

  1. Phase 01

    Discovery call

    Systems, data and the process the build must support.

  2. Phase 02

    Specification

    Mappings, screens or architecture, error handling and test cases in writing.

  3. Phase 03

    Build and test

    Delivered in sprints with automated and user acceptance testing.

  4. Phase 04

    Deploy and hand over

    Deployed to your accounts or infrastructure with source code and a runbook.

Durations depend on scope and are set in the written proposal. Build work runs in 2–4 week sprints.

Platforms & capabilities

Tech this service works with

  • Webhooks
  • APIs
  • Zoho Marketplace
  • CRM
  • Integrations
  • Workflow automation

Typical integrations

  • CRM APIs

    Records, metadata and user context.

  • Third-party APIs

    Maps, file storage, messaging and data services.

  • Webhooks

    Events to and from external systems.

  • Identity

    OAuth connections to other services.

Questions about Custom Extension Development

Still unsure? Email info@insyrge.com

What is a CRM extension?

A package that adds functionality inside a CRM, such as a widget on a record page, a custom button, a related list or a background function.

Private or marketplace extension?

A private extension is installed only in your account. A marketplace extension is published for other businesses to install and must pass the platform's review.

Can an extension show data from another system?

Yes. Widgets can call external APIs and show that data on the CRM record.

Will the extension survive CRM updates?

We build on supported extension frameworks and APIs, which are designed to stay stable across platform updates.

Can you help publish an extension to a marketplace?

Yes. We build to marketplace review standards and prepare listing material.

Do we own the extension?

Yes. Source code and documentation are handed over.

How do we start?

A free 45-minute call, then a written specification.

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