Hi there, Christina. You can browse our approved apps directly within your QuickBooks Online account. Just navigate to Integration > Find integrations to view the full list. Every app in our store is thoroughly vetted by Intuit to ensure your data remains secure.

For your custom in-house software, the process is slightly different. Your development team can build a direct connection via the Intuit Developer Portal. Signing up is free, and the portal provides all the documentation your team needs. You can also post technical questions in their developer forum, where experts are available to assist you.
Feel free to reply if you have any questions. We're here to help.