AI-Powered Voice Assistants for Banking Customer Service

Need
Scalable, intelligent solution, aiming to improve operational efficiency, enhance customer satisfaction, and reduce support costs
Solution
Robust solution based on AI-powered voice assistants for banking customer service
Technologies
Python
PostgreSQL
Amazon Polly
ElevenLabs
FastAPI
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Result

32%
Reduction in call center costs
82%
Сustomer inquiries resolved without human intervention
2x
Faster resolution times for common banking support tasks

Customer

One of Hungary’s leading financial institutions, One Bank (name withheld due to NDA restrictions), serves 1.3 million customers across the country. With a network of 145 branches and 380 ATMs, the bank combines a strong physical presence with a growing digital footprint, engaging 1.5 million users through its online platforms. Managing €28.7 billion in assets, it plays a crucial role in the national economy—supporting 75,000 small and medium-sized enterprises (SMEs) and employing 4,800 professionals throughout Hungary.

  • Natural speech recognition
previewpreview

Challenges & solutions

Problem
number

One Bank (name withheld due to NDA restrictions) faced mounting pressure to modernize its customer service. Despite strong digital adoption among users, its traditional call center model couldn’t keep pace with growing demand and evolving expectations.



Overloaded Call Centers
The bank’s support teams were overwhelmed by repetitive, low-complexity queries like balance checks, transaction history, card issues, and loan application status. These accounted for more than 60% of total inquiries, leaving little bandwidth for complex or high-value interactions. During peak periods, wait times surged, and abandonment rates increased — resulting in frustrated customers and missed engagement opportunities.



Limited Availability
Support was largely limited to standard business hours, with minimal weekend or evening coverage. As more users adopted digital-first lifestyles, the lack of 24/7 assistance created frustration and contributed to declining CSAT scores.

Problem
part2

Rising Costs, Low ROI
Despite scaling up its support team, One Bank (name withheld due to NDA restrictions) saw diminishing returns. Operational costs rose year-over-year, driven by agent onboarding, training, and legacy infrastructure maintenance — all without significant improvements in resolution speed or efficiency.



Poor Scalability During Growth
New product launches and marketing campaigns frequently triggered call volume spikes. Without flexible infrastructure, the bank couldn’t scale support operations fast enough, leading to delays and customer dissatisfaction.

Fragmented Experience and Security Risks
Customers often had to repeat information when transferred between departments. Agents lacked a unified view of prior interactions, slowing response times. Meanwhile, compliance with GDPR and PSD2 created pressure to modernize systems in a secure, auditable way — something legacy tools couldn’t deliver effectively.



To address these challenges, One Bank set out to implement AI-powered voice assistants for banking customer service, aiming to improve operational efficiency, enhance customer satisfaction, and reduce support costs.

Solution
number

To overcome growing support challenges, One Bank (name withheld due to NDA restrictions) partnered with Plavno to design and build a robust solution based on AI-powered voice assistants for banking customer service. The goal: automate routine inquiries, reduce operational costs, and deliver 24/7 customer service through natural, human-like voice interactions.

Key Objectives:

  • Reduce the workload for support operators;
  • Cut the average handling time for incoming calls;
  • Boost customer satisfaction with fast, accurate voice support;
  • Automate order placement and responses to frequently asked questions.

Solution
part3

Rollout Strategy
Plavno and One Bank (name withheld due to NDA restrictions) adopted a phased rollout strategy to ensure security, stability, and performance. The process began with internal sandbox testing, where employees validated speech recognition, NLP accuracy, secure voice authentication, and integration with core banking systems. Based on feedback, the AI models were refined before moving to a soft launch with a limited group of customers via mobile apps and IVR.

This stage allowed real-world testing, multilingual fine-tuning, and optimization of live agent escalation. After confirming reliability and compliance, the assistant was fully deployed via IVR, mobile, and smart assistants. Post-launch, the system entered a continuous improvement cycle with performance monitoring, model updates, and feature expansion based on user behavior and analytics. This strategy formed the backbone of a secure, scalable solution tailored specifically for AI-powered voice assistants for banking customer service.



Results

The results of the project exceeded expectations and clearly demonstrated the value of implementing AI-powered voice assistants for banking customer service:

  • 32% reduction in call center costs within the first 6 months
  • 82% of сustomer inquiries resolved without human intervention
  • 2x faster resolution times for common banking support tasks
  • 24/7 customer service availability across digital channels
  • 21% improvement in CSAT (Customer Satisfaction Score)


This success led One Bank (name withheld due to NDA restrictions) to expand the use of the voice assistant across more departments and languages.

Features
number

One Bank’s AI-powered voice assistants for banking customer service offer fast, secure, and natural interactions to enhance customer support.


  • Conversational Support. Quickly handles common banking queries like balances, transactions, and loan statuses with advanced natural language understanding.
  • Secure Voice Authentication. Uses multi-factor and biometric voice verification to protect sensitive customer data and comply with banking regulations.
  • Omnichannel Integration. Supports voice access via IVR, mobile apps, websites, and smart assistants, providing a seamless experience across channels.
  • Multilingual Support. Delivers accurate responses, tailored to regional customers.
  • Live Agent Escalation. Transfers complex issues to human agents with full conversation context, speeding up resolution.
  • Analytics Dashboard. Tracks performance, user sentiment, and call trends to optimize the AI-powered voice assistants for banking customer service.
  • Self-Learning AI. Continuously improves through real interactions to stay effective and relevant.

Features
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process

Crystal clear process

Agile methodology forms the cornerstone of our work philosophy. Through a seamless blend of innovative practices, including regular demos, comprehensive progress tracking, and a unique pay structure based on hours invested, we've constructed a workflow that ensures optimal outcomes and client satisfaction.

discovery
design
development
Testing
Launch
Maintenance
Conduct market research
UX Research
Components
Perform integration testing
Address issues in staging environment
Audience analysis
Moodboards
Develop UI components
Test personalized algorithms
Monitor customer satisfaction
Identify key features
Prototyping
API integrations
Deploy to production
Gather user feedback
Define project scope
UI Design
Implement custom features
Address and fix bugs
Updates and improvements

project team

Launch, accelerate and support your business with our teams

Dmitry
Dmitry
Frontend
Expertise
Fullstack Developer with more than 5 years of experience in React and Node.js.
TypeScript
Node.js
Express
Next.js
React
Yan
Yan
QA
Expertise
Experienced QA Engineer with a strong background in Cypress and Selenium automation testing.
Postman
Selenuim
Bamboo
Python
ADB
Aleksandr
Aleksandr
DevOps
Expertise
Lead DevOps with 6+ years of experience in implementing the entire infrastructure and architecture.
Dart
Terraform
Kubernetes
Docker
Azure
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Testimonials

clutch
“They really understand what we need. They’re very professional.”

The 3D configurator has received positive feedback from customers. Moreover, it has generated 30% more business and increased leads significantly, giving the client confidence for the future. Overall, Plavno has led the project seamlessly. Customers can expect a responsible, well-organized partner.

Sergio Artimenia

Sergio Artimenia

Commercial Director, RNDpoint

FinTech
Project description

Plavno has developed a web application for a product development company. They’ve built a 3D configurator that allows clients to design a unique final product by choosing colors, materials, and other options.

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clutch
“The quality of their work speaks for itself.”

Plavno has completed the project within five months and helped to save $400,000 on client’s crypto startup launch. The client has also recorded one million onboarded users in a year. Moreover, Plavno provides high-quality codes, offers 24/7 interactive support, and communicates well.

Margarita Gushchina

Margarita Gushchina

Recruiter, Expert Soft

Blockchain
Project description

Plavno has created a multi-layered ecosystem designed to accelerate the ownership economy and address a software development firm's main paradigm shifts. They've used Node.js, Solidity, and PostgreDB.

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clutch
“We are very satisfied with their excellent work”

Through the partnership with Plavno, we built a system used by more than 40 million connected channels. Throughout the engagement, the team was communicative and quick in responding to our concerns. Overall, we were highly satisfied with the results of collaboration.

Michael Bychenok

Michael Bychenok

CEO, MediaCube

FinTech
Project description

Plavno was hired by a YouTube network to develop an internal portal for bloggers that handled Google reports for their company. They also built an e-wallet and a system where users' information was collected.

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