Lack of Support - Begging for assistance addressing their integration issues and it has been nearly impossible to receive any assistance. Only respond via email at the end of the day giving repetitive instructions to uninstall and re install, No one to speak to via phone or real help at all. I highly recommend using alternatives solutions with better support and less bugs.

Lack of OneSaas Support - Begging for assistance addressing their integration issues and it has been nearly impossible to receive any assistance. Only respond via email at the end of the day giving repetitive instructions to uninstall and re install, No one to speak to via phone or real help at all. I highly recommend using alternatives solutions with better support and less bugs.

Integration issues - Ever since Intuit/OneSaaS took full control of this integration, it’s been a nightmare. The new version no longer functions correctly — it only imports partial data from BigCommerce into QuickBooks Online. Shipping charges don’t sync, so invoices and payments never match (payments include shipping, but invoices don’t). Customer addresses are no longer imported, guest checkouts are skipped entirely, and even check payments are marked as “paid,” creating constant reconciliation issues. I’ve spent the past month manually fixing every transaction, adding addresses, and adjusting invoices one by one. BigCommerce support has been great but can’t help since Intuit now owns the app, and OneSaaS has yet to fix these problems despite multiple tickets. This rollout was irresponsible and has seriously disrupted my accounting workflow.

Great Support - Nick is awesome. Has now helped me twice with sync issues. So friendly & helpful.

Integration Broken - After the update on 6th of October the QuickBooks app no longer integrates. Was working perfectly prior to the update, was just told it is now back online and uninstall and reinstall and it will work, I have followed the process and still not working.

Integration Broken - The app updated and the connection has been lost from BigCommerce to QBO, nothing will update. On with the chat yesterday with no resolution. Allegedly in 24-48 hours the legacy app will be be re-introduced and the connection restored. It has been down all week.

Does anyone have it working again yet (10/06-25) - Everything was working fine, then an update has made nothing work. It can't sync with payment methods, it was great before, now basically just doesn't work.

Updates have ruinted it - Everything was working fine, then an update has made nothing work. It can't sync with payment methods, it was great before, now basically just doesn't work.

Great Customer Service - Was having issues with the integration appearing in BigCommerce but had a wonderful talk with Rods who helped troubleshoot the issue with me.

Integration Ruined - UPDATE: 10/15Thanks to these reviews, I decided to contacted support. I chatted with Francis who helped me implement the workaround. He was very patient and helpful. I now have a working system again!I thought I was going crazy until I saw the most recent reviews. I'm also stuck with a new app that doesn't work. I now have a lot more work to do with trying to find an alternative, manually entering online orders into QB, and manually updating inventory on our website. For something this major, we should have been notified about the changes in advance or at least given a tutorial on how this would work. I can't believe this was beta tested at all because there's no way this works for anyone. Poor planning and execution all around.

Integration Ruined - I thought I was going crazy until I saw the most recent reviews. I'm also stuck with a new app that doesn't work. I now have a lot more work to do with trying to find an alternative, manually entering online orders into QB, and manually updating inventory on our website. For something this major, we should have been notified about the changes in advance or at least given a tutorial on how this would work. I can't believe this was beta tested at all because there's no way this works for anyone. Poor planning and execution all around.

APP IS RUINED AS OF 9/30/25 - A new update that was released was in fact a completely new app. This app does not support inventory syncing so any website that was utilizing Quickbooks as their inventory management software and had live inventory on their website is now completely screwed. There are quite a few features they removed with the new app without any notification that has completely ruined my website's functionality. They say there is no way to return to the old application and to be patient while their developers update their software with an unknown ETA. They say I should research something else to better work for my business, after I am now in a position where I am completely screwed. I will be getting rid of Onesaas and Quickbooks as soon as I now RUSH to find an alternative.

I need help! - I have your integration running, but I want to make some adjustments. When I try to "Get Support" or "Contact Partner" from your marketplace site, it takes me somewhere I can't request help. I am hopeful someone can see this review and provide help! Every time I try to open the app from within BigCommerce I get the following error: Something went wrong.Could not sign in user. Unknown identity.Please try again later or contact customer support.Error Id: us2~250903-400073dc-0000-da00-b63f-84710c7967bb

fantastic support - Francis from OneSaaS fixed my issue almost instantly, now its back to working perfecly, francis was friendly and professional, highly recommend,

Great help - Franics from ONESAAS helped me out with a bug i was working with in the app. I didnt think it could get fix but he did it. Thanks for the help1

BEN fixed customer map in 5 seconds - App is pretty maintenance free. One downside is that is lacks GUI to manage customer mapping so if you delete/merge a customer, you have to reach out to support. Also, BC nor QB support have a clue when it comes to the app...they cannot even provide the correct contact information to reach OneSaas.

syncing issue fixed fast by Sherwin - Sherwin helped me out in record time today. He was kind, asked all the right questions, and fast to figure out what was stopping my integration on one invoice. I think you are rivaling the best customer service with Big commerce in my book! They also have great help and I'm so glad you are partnering with them and continuing the support for my small business. Sherwin deserves a raise! or at least buy him a special lunch as a thank you from me!

Great support from Francis - We received very helpful support from Francis. We didn't have everything set correctly for invoice number sequencing. Francis walked us through both correcting our QB's account and getting the proper settings in place in the app. Thank you!

FRANCIS is super HELPFUL - FRANCIS is HELPFUL. Thank you Francis for resolving the issues and appreciate it.

App Integration Support Success - Our QBO integration was disconnected when we changed users. Emailing OneSaas was a nightmare with the response time and understanding of my issue. Once, I was connected with LORI via their online chat, she had it handled within minutes. Thank you, LORI!