Custom integrations

Connect your SaaS tools with a custom API integration. 

How many apps does your company use? 

As companies grow, they use more and more apps. The smallest companies use up to 40 apps. Companies with fewer than 1,000 employees typically have 151 apps, while enterprise-level businesses can realistically expect to be using 200 or more. 

Do your apps talk to each other? 

If not, then you know the pain of copy & pasting data between tools or importing CSV files. It's time consuming and error prone. 

A custom integration will be more efficient and will improve the reliability of your data. 

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Why build a custom integration?

If your software has an API, then it can be integrated with another platform. Sure, you can make use of middleware like Zapier or Workato for a basic connection but what if you need something more complex? 

A custom integration can achieve exactly what you need it to. Even better, if can include built-in error checking and reporting. 

In short, you can trust a custom integration to do what you ask and tell you when it finds an issue. 

What's involved in building a custom integration?

There are 4 steps to building a custom integration:

  1. Systems architecture: by talking to you and your team, we'll establish your current tech stack and identify the processes where a human has to move data between systems. We'll then document a plan for how that can be automated.
  2. Development: one of our API developers will build a custom integration that makes use of best in class platforms like Google Cloud and Amazon Web Services to connect the platforms together. The entire integration will be built with custom code so that it does exactly what you need it to.
  3. QA testing: we'll work with you to test the integration so that you can be confident it meets your needs. We'll get to work crushing any bugs.
  4. Training & documentation: we'll conduct a training session for relevant team members so that they understand how the integration works and can update any user-configurable elements. We'll provide you with clear and simple documentation for future reference. 

Custom integration pricing

We would love to give you an exact price for your custom integration... but it's a custom integration! 

To reduce uncertainty about the cost implications of a fully custom-coded integration, ESM Inbound starts every integration project with a Diagnostic Engagement. This is a project where we work with your team to document the business requirements, identify the behaviour of the integrated systems and create a detailed plan for how the integration should be built. 

Once that engagement is complete, we will be able to give you an outline of the work required and a price if you choose ESM Inbound to build the integration. 

Most integrations cost between £5,000 and £10,000 but more complex requirements will result in higher prices. 

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2,000 +

Plan how your systems should be connected and confirm the technical requirements. 

A fully-documented integration plan that will define the development stage.

Prices start at £2,000.


Fully-customised API development to connect your SaaS tools. 

Pricing based on the scope in the Diagnostic Engagement stage.

What's included with a custom integration?


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A clear plan for your integration

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A dedicated API developer

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QA testing

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Training and documentation

Ready to build your integration?

Fill in the form below to speak to an expert about planning your custom integration.