Salesforce Open CTI retiring

We rely heavily on the Open CTI functionality in Salesforce, linking to our RingCentral service.  However, Salesforce is retiring Open CTI in February 2028 (see link below), in order to push their Salesforce Voice service.  

While there is a bring-your-own-telco option to connect to Salesforce Voice, the service is still fairly expensive.  Is there an alternative solution that RingCentral has (or is planning to have) for those customers that are dependent on Open CTI, but are looking to avoid the additional costs for Salesforce Voice?  

https://help.salesforce.com/s/articleView?id=005306437&language=en_US&type=1