Fall 2025 Concurrency Report
Dial or Die
Concurrency Economics in Peak Season
Synthesys' Peak-season connect rates soar 71% when teams switch from sequential dialing to burst concurrency
That’s the fastest lift we’ve recorded across 18 industries. See how high-volume orgs used Synthesys to triple first-call contact and stabilize queues during their busiest quarter.
Key findings
Contact in seconds, not minutes. Firms that activated ≥250 concurrent lines cut average “dial-to-hello” latency from 4m 12s to 46s, lifting first-attempt connects by 71%.
$112 in extra revenue per rep, per day. Concurrency reduced idle time 38%, translating to one additional qualified conversation every 19 calls.
Infrastructure matters. Teams running cloud SIP trunks on Synthesys saw 99.997% uptime during Black Friday week; legacy PBX users degraded to 97.2%.
Compliance at scale. Dynamic throttling kept TCPA‐safe call spacing while still delivering a 4.3× higher connect/second burst than sequential dialing.
What you’ll learn
Billions of AI-driven calls in Q3 show how market leaders handle the chaos of peak season. Inside, we break down concurrency math by vertical, reveal the hidden cost of under-provisioned trunks, and give you a five-step playbook to replicate the gains without tripping consent or DNC rules.
Based on anonymized telemetry from 4.8M outbound calls processed on Synthesys between July 1 – Sept 30 2025. Minimum n = 50 companies per vertical. All figures reported with 95% confidence intervals.
Related content
The 10-Second Advantage
Benchmarks from 4.8 million inbound calls prove that replies inside 10 seconds triple pipeline conversion.
CRO / VP Sales
Q3 2025
Voice Commerce Recovery Index 2025
Vertical-by-vertical data on failed-payment saves (avg. +19% revenue recapture) and the optimal retry schedule.
eCom / SaaS Growth Lead
Annual Report
Retention Wars — AI Save-Offer Playbook
Churn-risk outreach benchmarks, channel mix tests, and copy templates that push save rates past 31%.
CX / Lifecycle Manager
EOY Report