Reasoning
All independent sources indicate Apptivo has built-in telephony/VoIP: TechRadar (0.90), PCMag (highest domain confidence 0.80), Software Advice (highest domain confidence 0.90), and Capterra (highest domain confidence 0.95). For each domain, multiple entries were collapsed to a single opinion using the highest confidence. No source provides a conflicting 'false' value. Therefore, the consensus across credible sources supports true.