Hello KIRTIKA MITTAL,
Welcome to the Microsoft Q&A and thank you for posting your questions here.
I understand that you're asking on how you can export your Azure DevOps Organization Data to Another Platform.
Regarding your questions, the recommended tools and APIS are the followings:
You need only need to be at alert for the limitations as its stated in the following links:
- https://learn.microsoft.com/en-us/azure/devops/organizations/settings/work/object-limits?view=azure-devops
- https://learn.microsoft.com/en-us/azure/devops/integrate/concepts/rate-limits?view=azure-devops
Then, put in consideration best practices for migration as Microsoft provides comprehensive documentation on using Azure DevOps, including best practices for exporting data.
I hope this is helpful! Do not hesitate to let me know if you have any other questions or clarifications.
Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful.