Hi @Pavanchand Brhmabhotla Thank you for contacting us!
I understand that you are looking for replacement of Attunity tool. If you are planning for migration of your on-premise workloads to Azure, then Azure migrate would be best option - https://learn.microsoft.com/en-us/azure/migrate/migrate-services-overview and https://azure.microsoft.com/en-us/services/azure-migrate/#getting-started
If you are looking business continuity and disaster recovery (BCDR) solution, Azure Site Recovery suits your requirement. Refer to the documentation below:
https://learn.microsoft.com/en-us/azure/site-recovery/site-recovery-overview and https://azure.microsoft.com/en-in/services/site-recovery/