Most businesses we work with don't just run on HubSpot. They also rely on other software to manage bookings, ticket sales, property listings, or industry specific operations, and all of that data needs to flow into HubSpot for marketing and sales to work properly. Sometimes that connection is simple. Other times the two systems need a custom built bridge designed specifically for how that business operates, and that's where things get more complicated.
If your business uses a platform that doesn't talk to HubSpot the way you need it to, you're not alone. Ticketing platforms, property management systems, booking and reservation tools, niche industry software - they all hold essential data HubSpot needs, and the way that data moves (or doesn't) between systems shapes everything from your marketing automation to your reporting accuracy.
When native connectors aren’t available, or don’t include the data you need, custom integrations are the next step - but choosing the wrong integration partner doesn't just cost you money. It can leave you with fragile integrations that can break under load, data that flows one way when you need it flowing both, and a HubSpot instance that never quite does what you were promised it would. If you've been burned before or you're staring down a build and don't know who to trust, here's what to actually look for.
Before you even think about a partner, work out which one you need. HubSpot's app marketplace has native connectors for hundreds of platforms and for straightforward use cases, they're usually the best bet. But "available" and "sufficient" are different things. Native connectors often have genuine limits:
If you've got a standard setup, the native connector might do the job. But if you've got a custom source platform, run multiple accounts or operate in a niche segment of a broader industry, this is usually where the native connector runs out of road and where a custom integration becomes worth the investment.
This is the part a lot of businesses can get wrong. It's tempting to default to "a HubSpot partner" and assume that covers it. Here’s what you need to look out for:
This is where Engaging.io's work tends to live. As an Elite HubSpot Solutions Partner, we have built integrations across ticketing (we’re an accredited Ticketmaster partner), hospitality platforms like SevenRooms and property data through the Real Estate Syncer. We also built Jinnsync, a middleware connector platform that handles common integration patterns instead of building every connection from scratch. We didn't build this because we wanted another product on the shelf. We built it because we kept seeing the same kinds of problems for different clients and it made sense to build for that instead of starting from scratch each time.
While it’s a setback, a failed or fragile integration can always be fixed. The work usually starts with mapping what's actually happening (where data drops, duplicates or stalls) before any rebuild begins. You're not starting from zero, and you're not the first business this has happened to.
Whoever you choose, the project lives or dies on scoping, and two things make the biggest difference:
Be specific about your sync requirements. How often does the data actually need to move? Real time, hourly, daily? Sync frequency drives both cost and complexity, so vague requirements lead to either overbuilt (expensive) or underbuilt (frustrating) solutions.
Bring the day to day users into the room. The people entering and using this data daily will spot problems a technical scoping document never will. Include them early, not after the build is signed off.
Understand the costs and risks. Just like a car needs a mechanic, an integration will need a developer. Integrations can break when one platform makes a change, need updating when a data set up changes or new data needs to be mapped. Make sure you budget for the cost of maintenance, not just the build.
Getting this right from the start is far cheaper than fixing it after the fact, and it's the difference between an integration that quietly works and one you're explaining away in six months.
If you're weighing up a custom integration or trying to work out why your last one isn't holding up, talk to our team about what your specific setup actually needs.
How do I know if I need a custom integration instead of a native connector?
If your setup is relatively standard, a native connector is usually enough. If you've customised your source platform, run multiple accounts, work in a niche industry segment, or need two way sync and custom property mapping, you’re probably looking at a custom integration to ensure success.
What should I ask a potential integration partner before hiring them? Ask what they know about the non-HubSpot platform specifically, whether they've built integrations or apps in your industry before, and ask for examples of data they've worked with that's similar in volume or complexity to yours.
Can a broken or one way integration be fixed without starting over?
In most cases, yes! The first step is mapping where the current integration is dropping or duplicating data, then rebuilding from that diagnosis rather than scrapping everything and starting fresh.
Does sync frequency really affect cost?
Yes, significantly. Real time sync requires more infrastructure and ongoing maintenance than hourly or daily syncs. Defining your actual need (not just defaulting to "real time") keeps the build proportionate to the problem.