Synchronization between MS-SQL on premise database and azure database

Is there any stable way to synchronize a table between a MS SQL Server on premise database and a table in an Azure database?

So far i have found the following possibilities, but they are not stable:

1. SQL Data Sync
2. Transactional Replication
3. Self written TSQL Script with Elastic Database Transactions(T-SQL is planned for a later time and .Net is not stable)

I use SQL Server 2012 Standard Edition. My problem with the first two methods is that they are not recommended for production use. I expect suggestions from experienced people.