AI Voice Sales Automation for a Call Center with ElevenLabs & Salesforce
A US-based outbound sales operation was running 60 agents on phones full-time — high turnover, inconsistent pitch delivery, manual Salesforce data entry, and time-zone-limited capacity. SpiderHunts built an AI voice sales agent using ElevenLabs for natural-sounding voice, Claude for real-time conversational reasoning, and Salesforce CRM for end-to-end lead tracking. The system now runs 24/7 with just 4 humans monitoring dashboards and handling escalations — a 93% headcount reduction, $14,500+ in monthly savings, and 3x the call volume.
Project Snapshot
A US outbound sales operation ran 60 agents on phones full-time — selling B2B services across the United States. The operational pain was relentless: high turnover meant constant re-hiring and re-training, pitch delivery varied wildly between agents, Salesforce CRM entries were slow and inconsistent, and the calling window was limited to working hours across only some US time zones. Scaling further required hiring — and the unit economics were already tight.
- Industry
- Outbound Sales / Call Center
- Project Type
- AI Voice Agent + Salesforce CRM Integration
- Duration
- 14 weeks
- Investment
- £28,000 fixed-price + £1,800/mo operations
- Staff Before / After
- 60 agents → 4 monitors
- Monthly Savings
- $14,500+ net (after platform costs)
The Challenge
A US outbound sales operation ran 60 agents on phones full-time — selling B2B services across the United States. The operational pain was relentless: high turnover meant constant re-hiring and re-training, pitch delivery varied wildly between agents, Salesforce CRM entries were slow and inconsistent, and the calling window was limited to working hours across only some US time zones. Scaling further required hiring — and the unit economics were already tight.
Before SpiderHunts
- 60 outbound sales agents — payroll, training, management overhead at scale
- Agent turnover at roughly 90% annually — training new hires never stopped
- Pitch quality inconsistent — top performer vs bottom performer 5x conversion gap
- Calls only happened in working hours — missed prospects in West Coast and after-hours
- Salesforce CRM updates took 4-7 minutes per call of after-call admin work
- Compliance risk on call recording, DNC list adherence, and TCPA from individual agent variation
After SpiderHunts
- 60 → 4 — Headcount (monitoring only)
- $14,500+ / month — Net savings after platform cost
- 3x — Daily call volume
- 24/7 — Operating hours
- ~1 sec — AI conversation response latency
- 100% — Calls auto-logged in Salesforce
The Solution
SpiderHunts built an end-to-end AI voice sales platform: ElevenLabs voices indistinguishable from human agents, Anthropic Claude driving real-time conversation logic and objection handling, Twilio for telephony, and bidirectional Salesforce sync that updates leads, opportunities, and call notes the moment the call ends. A small human team of 4 monitors live calls, takes over hot leads, and tunes prompts based on outcomes.
01
ElevenLabs voice generation
Branded, natural-sounding voices tuned for the client's industry. Multiple voice profiles A/B tested for connection rate. Sub-200ms latency between AI response generation and speech output — fast enough to sound conversational.
02
Real-time conversational AI
Anthropic Claude 3.5 Sonnet handles the conversation logic — opening, qualifying questions, objection handling, value pitch, close attempts. Prompts are dynamically built from Salesforce context (industry, company size, prior interactions) before every call.
03
Twilio telephony layer
Twilio Voice + Media Streams for bidirectional audio. OpenAI Whisper transcribes the prospect's speech in real-time and feeds it to Claude; Claude's response goes to ElevenLabs, then back to the prospect — full loop under 1 second.
04
Bidirectional Salesforce sync
Lead lists pulled from Salesforce on schedule. Every call result — connected, voicemail, qualified, booked, not-interested — auto-logs as a Salesforce Activity with full transcript, sentiment analysis, and next-action suggestions. Sales reps see live updates in their Salesforce timeline.
05
Smart routing & live takeover
When a prospect signals high intent or asks a complex question outside the AI's confidence zone, the call instantly routes to one of the 4 human monitors with full context — transcript, lead history, and AI's suggested next move all on screen.
06
Compliance built-in
DNC list checking before every dial, automatic call recording with consent prompts, TCPA-compliant calling windows enforced per state, call dispositions logged for audit. The AI cannot make calls outside legal hours.
07
Live monitoring dashboard
React + TypeScript dashboard showing all live calls in progress, real-time transcripts, AI confidence scores, and one-click takeover. Daily, weekly and monthly analytics — connection rate, qualification rate, booked-meeting rate, by voice profile and by script variant.
08
Continuous prompt tuning
Weekly review of low-converting calls feeds prompt improvements. New script variants A/B tested against control. Within 3 months of launch the AI was outperforming the previous human team's average on qualification-to-meeting conversion.
Tech Stack
Production-grade components selected for sub-second voice latency, telephony reliability, and tight Salesforce CRM integration.
Results
Measured at the 4-month mark following full production rollout.
We replaced an entire floor of agents with four people watching dashboards. The AI never has a bad day, never misses a Salesforce update, and works while we sleep. Honestly the hardest part was telling the team — the savings were so big the math was undeniable.
— VP of Sales Operations, US Outbound Sales Company
Ready for a Similar Result?
Have an outbound sales, voice support, or appointment-setting operation that could be automated? SpiderHunts builds production AI voice systems with ElevenLabs + CRM integration. Book a free discovery call.