Custom development for HubSpot


We've built our own platform to monitor API updates to eliminate future technical issues for you.  


We work primarily with marketing automation services like HubSpot, Pardot, InfusionSoft, Salesforce and other systems, so there is no learning curve, we already know ins and outs. 

Your Integration Agent is here. We will develop integrations for systems you already use to make it feel like custom software created just for you. 

Get the most out of your marketing automation

You use powerful tools for sales and marketing, they work perfectly... almost. 

But there is always something you wish to add or change: additional reports, integration with your CRM or other systems, exporting from Excel sheet stored in Dropbox. 

There are tons of potential improvements for your exact business processes. 

Hopefully, most of the marketing tools allow to build custom modification on top of them to satisfy your needs.

How can we help you?

You might have problems with standard integrations, that don't cover your specific case. Or may be you need to import your data from one system to another. Or even add couple new buttons to your HubSpot page (yes, we can do that too).   

Let's have a free consultation to find out what are the possible solutions for your problem.

Denis helped us create a workflow between Salesforce and HubSpot that wasn't present in the standard integration that exists between the two platforms. 

Without too much explanation he easily understood what we were trying to accomplish, and was able to execute the project on time.

I really liked that he seems to be up to speed on a lot of the newer functionality within Salesforce and was able to utilize some of these new tools (Process Builder) to reduce the number of hours needed. I would definitely recommend Denis with Integration Agent for any integration projects you might need some custom development on.

Trent Boorman / Systems Analyst at SASB 

We’ve been fortunate finding Denis with Integration Agent and having us do HubSpot integration for us. His work has been key to getting a range of features and capabilities in place on our website. In addition, his expert counsel and quick work has been a Godsend.

Kevin Shayne / Director of Marketing at CADD Edge

Denis from Integration Agent was a great find! He had the skills to handle our Hubspot to Freshdesk integration out of the box so there was no cost for him to learn about either platform. 

We met and discussed deliverables and they were done a week later. When minor changes were requested he handled it quickly. 

He was available to bounce ideas off of regarding other integrations which we proceeded with and had the same speedy results. 

My team is very happy with how much more connected our platforms feel and how it allows them to be more productive. I whole heartedly recommend Denis and Integration Agent.

Laureen Jandroep / CEO of Certification Coaching

We hired Denis to support us to integrate Xero to our new CRM System. Denis did a fantastic job. We agreed on a time frame for the work to be completed. Denis completed before the deadline. He was very helpful through out the process. 

I would highly recommend Denis with Integration Agent he is professional and reliable.

The work Integration Agent has done goes beyond what I hoped would be possible to accomplish! I'd recommend the company without hesitation.

Chad Lawie / CEO at Longer Days

Our clients say

Denis developed an elegant, clean and user-friendly solution in HubSpot for an event registration module that not only integrates with HubSpot forms, but also with PayPal for payment. He was a delight to work with, responding quickly to feedback and ready with clear instructions. 

I highly recommend Denis with Integration Agent, and look forward to working with him again.

Christine B. Whittemore / Chief Simplifier at Simple Marketing Now LLC 

Working with Denis of Integration Agent was extremely refreshing. Excellent communicator and goes beyond an expectation we had. Extremely happy with our results and the new relationship.

September Dohrmann / CEO at CEO Space International 

Denis of Integration Agent provided a cost-effective way for us to move data from a difficult-to-export system into HubSpot. We required a number of sample imports and testing of the data migration along the way. Denis was patient and thorough.

Anne Lehan / Marketing Director at, LLC 


There are many stories when consultants create a solution and then leave clients one on one with it. 

But what if 3rd party services change API? What if there is a new security patch for a web server? Or your business processes have changed and you need to update the code? 

We will handle all ongoing technical problems you may face. Our monitoring tools allow us to fix some issues even before you notice that.

Monthly fee includes cost of servers and other tools we use to keep you running.

Who is behind Integration Agent?

Integration Agent was founded by Denis Lunev in beautiful Chicago, IL.

Denis has been developing software for more than 9 years for a variety of companies, including fast growing startups as well as large enterprise corporations.

He started Integration Agent to help businesses to supercharge marketing and sales processes.

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