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How to synchronize data with HubSpot API?

Written by Luc Benayoun | 10/01/2025

Data synchronization is a bit like juggling several balls (or rather, several tools) without ever dropping one. And if you're the kind of person who juggles CRMs, databases and various applications, you know that keeping all this information up to date and in harmony can quickly become... a nightmare. Fortunately, with HubSpot's API, it's a bit like having a personal assistant to synchronize it all without too much effort!

In this article, we're going to find out how to synchronize your data with HubSpot, why it's a great idea, and above all how to do it all without pulling your hair out. Because, let's be honest, nobody wants to manage tons of obsolete data. So we're going to show you how to keep it all clean, in sync and always up to date.

Data synchronization is a bit like juggling several balls (or rather, several tools) without ever dropping one. And if you're the kind of person who juggles CRMs, databases and various applications, you know that keeping all this information up to date and in harmony can quickly become... a nightmare. Fortunately, with HubSpot's API, it's a bit like having a personal assistant to synchronize it all without too much effort!

In this article, we're going to find out how to synchronize your data with HubSpot, why it's a great idea, and above all how to do it all without pulling your hair out. Because, let's be honest, nobody wants to manage tons of obsolete data. So we're going to show you how to keep it all clean, in sync and always up to date.

What is data synchronization and why is it essential?

Data synchronization is the art of keeping all your information up to date, wherever it is, all the time. Imagine you've got a contact in your CRM, but his information isn't aligned with that of your marketing or sales tool. What a mess! In 2024, waiting for a manual update is like using a fax machine... nobody wants to do that anymore.

Synchronizing your data means ensuring that everyone - be it your teams, your tools or your customers - shares the same information in real time. With up-to-date data, you can create hyper-relevant marketing campaigns, deliver a personalized customer experience, and ensure that every team is on the same wavelength. No more e-mails sent to out-of-date addresses, no more frustration: everything is fluid and perfectly synchronized!

How does data synchronization work with the HubSpot API?

Basically, HubSpot's API is like a messenger that goes back and forth between your tools, taking care to synchronize all information. Updating HubSpot? No problem, your CRM is updated too. A new lead arrives in your database? Boom, HubSpot adds it directly and completes its information automatically. All effortlessly. It works thanks to endpoints that extract and send data across your various tools.

No need to become a development expert (or know your favorite developer's keyboard shortcuts). HubSpot's API takes care of everything.

What types of data can be synchronized with the HubSpot API?

You can synchronize an impressive amount of data, and it goes far beyond simple contacts. For example:

  • Contacts: names, email addresses, phone numbers (because nobody likes calling the wrong number, except perhaps to test their patience).
  • Businesses: all info related to your customers (except, perhaps, their favorite drink - but we're working on it).
  • Transactions: all sales-related data. Amounts, products, all synchronized too!
  • Tickets: because keeping track of your support requests is as important as knowing when to take the pizza out of the oven.

Bidirectional or unidirectional synchronization?

In the wonderful world of data synchronization, you have two options: unidirectional or bidirectional. It's like choosing between a monologue or a conversation. With unidirectional synchronization, your data travels from point A to point B, but never back. This is simple and effective if you have a specific data flow to follow.

But if you want to be more interactive, opt for bidirectional synchronization. Here, data flows in both directions, ensuring that every change in one tool is reflected in the other. Imagine: you update a contact in HubSpot and your external database is updated too. And vice versa. A dream come true, don't you think?

How do you synchronize data between HubSpot and other platforms?

Now that you're convinced that synchronization is your best friend, let's see how it works in practice. With HubSpot's API, you can connect HubSpot to almost any tool. Here's how it works in a few simple steps (I promise, it's not rocket science):

  • Authentication: Because, yes, we don't let just anyone in. Use an API key or an OAuth token to prove that you have the rights to do what you're doing.
  • API calls: This is where the magic happens. You're going to use HubSpot's endpoints to send or retrieve the info you need. It's all done via API calls, which allow HubSpot to talk to your other tools.
  • Data update: Once synchronization is in place, any change in a tool is automatically reflected in HubSpot (or vice versa). Simple, fast and efficient.

Synchronization example: HubSpot and an ERP system

Let's imagine you have an ERP system to manage your inventory and a HubSpot CRM to track your customers. Every time an order is placed, the HubSpot API updates the information in your CRM, and the ERP takes care of managing the stock (who bought what, and in what quantity). Your sales teams know exactly what's available in real time, and your customers are happy. Everything runs smoothly.

Why does data synchronization improve customer relations?

This is where it gets cool. Having data in sync is like having your favorite playlist automatically adapted to your mood, without you having to touch a thing. Good customer relationship management relies on up-to-date data. You want to send a personalized email to your customer, but you don't know that their address has changed? Or worse, you don't know what they bought last time? Don't panic, data synchronization does everything for you.

By keeping your customer information always synchronized between your different tools, you guarantee an optimal user experience. Your teams have everything they need to offer ultra-personalized communication, and your customers feel understood (and pampered).

Real-time data synchronization: the icing on the cake

Real time makes all the difference. By synchronizing your data with HubSpot in real time, you can be sure that all changes are taken into account immediately. Updating customer information at 9.03am? At 9.04am, everything is already updated in all your systems. There's no need to

Overcoming the challenges of data synchronization

Of course, it's not all rosy. Even data synchronization has its challenges. For example, what happens if two people update a piece of information at the same time? Who's right? Data synchronization is powerful, but you need to know how to manage data conflicts.

Here are a few tips to avoid headaches:

  • Monitor error logs: Yes, it can happen. A quick look at potential errors can save you a lot of stress.
  • Limit API calls: Too many API calls is like too much pizza. It feels good, but watch out for indigestion.

To sum up: HubSpot and synchronization are the basics

By using HubSpot's API to synchronize your data, you guarantee total consistency between your tools. Whether it's your contacts, transactions or tickets, HubSpot makes sure everything stays aligned. There's no need to check manually - everything is done automatically, live.

So, are you ready to dive into the wonderful world of data synchronization with HubSpot? You'll see, once it's up and running, you'll never want to go back. Want to find out more? Follow us on LinkedIn or subscribe to our YouTube channel for tips and tutorials on data synchronization with the HubSpot API!

Photo credit : Photo from Luke Jones on Unsplash