Executive Summary
A fast-growing African Internet Service Provider (ISP) transformed its customer engagement and sales operation by implementing Stubber's AI Sales Assistant on Web Chat.
In just 12 months, they slashed customer acquisition costs, more than doubled quoting efficiency, and boosted revenue by 35.8% — all while reducing staffing pressures and maintaining existing marketing spend.
Stubber's AI Assistant, capable of operating in any customer-required language, not only confirmed service feasibility but also generated personalized quotes and could complete the full sales process autonomously.
The Challenge: Manual Processes and Language Barriers
Before AI Implementation (Human-Only Sales Process)
The ISP faced several critical challenges that hindered growth across African markets:
Manual handling of all sales leads
Sales team struggling to meet rising inquiry volumes
Only 51.38% of customer inquiries received quotes
Language barriers restricting engagement across diverse African markets
Slow feasibility checks and quotes causing customer drop-offs
Limited service hours — call centers closed overnight
The Stubber Solution
After Stubber Implementation
Stubber transformed the ISP's customer engagement with comprehensive AI automation:
Instant, multilingual engagement capable of addressing customers in any required language
Automated feasibility checks and personalized quote generation delivered within minutes
Full sales capability: AI could onboard customers end-to-end, with human sales team support where needed
No increase in marketing spend — lead growth driven purely by 24/7 AI availability
Cost per interaction stabilized at ~$0.24, maintaining low operational costs
Implementation Timeline
Initial AI Assistant Deployment
3 Weeks
Number of APIs Integrated
2
Results: Before vs. After Stubber
% of Leads Quoted
51.38% → 87.13%
Languages Supported
Limited → Unlimited
Leads Handled (6 months)
~18,000 → ~36,000
Cost per Interaction
~$0.24
Marketing Spend
Standard → No Increase
"Stubber's AI Sales Assistant not only engaged leads but completed full transactions, confirming service availability, sending personalized quotes, and enabling immediate customer onboarding."
Impact at a Glance
+34.48%
More Leads Captured (with no marketing spend increase)
+128.05%
Increase in Quotes Sent
+35.8%
Revenue Growth Year-on-Year
+147.07%
Sales Growth in Portuguese-speaking markets
$9,495
Investment generated $103,727 extra revenue over 7 months
10.98x
Return on Implementation
Why It Worked
Stubber automated everything that could be automated: responding instantly, communicating across languages, confirming service feasibility, sending branded quotes, and even completing onboarding. The AI allowed human sales agents to focus only on closing high-value leads, driving faster deal cycles and reducing operational overhead.
Sales Process Transformation
Before:
Lead Inquiry → Manual Handling → Language Barriers → Slow Feasibility Checks → Manual Quote Creation → Limited Hours → High Drop-off
After:
Lead Inquiry → Instant AI Response → Any Language Support → Automated Feasibility → Instant Quote → 24/7 Availability → Higher Conversion
Conclusion
Stubber's AI Sales Assistant enabled this ISP to scale its customer acquisition without scaling its workforce, delivering fast, multilingual responses and dramatically improving lead conversion rates. With 24/7 engagement, even overnight, lead volume increased without additional marketing investment.
The strong 10.98x return on marketing investment over just seven months proves that Stubber's AI delivers tangible financial results.