Buffer vs ContentCal
ContentCal was acquired by Adobe in 2022 and folded into Adobe Express. The standalone product no longer exists. If you were considering ContentCal, Buffer is the obvious alternative for simple social scheduling.
Verdict
ContentCal is dead — acquired by Adobe and absorbed into Adobe Express. If you loved ContentCal's content calendar and approval workflows, look at Planable or CoSchedule. For simple social scheduling, Buffer is the straightforward replacement.