Automating analysis of customer communication: how LLM and modern AI tools are changing customer care

This article is related to our recent webinar on the same topic, where we also demonstrated the automated processing of an audio recording from a call centre using AI between two callers.

June 5, 2025
8
min read
Automating analysis of customer communication: how LLM and modern AI tools are changing customer care

Table of contents

Every day, hundreds to thousands of messages land in company emails, chats, social media, or voicemails. They contain frustrations, wishes, suggestions and warning signs that a customer is considering leaving for a competitor. Without systematic analysis, this information often fades into obscurity and companies miss the opportunity to respond in a timely manner.

Why a systematic analysis of customer communication pays off

Without a structured approach it is difficult:

  • detect recurring problems,
  • identify ideas for product improvements,
  • catch negative trends before they result in customer churn.

The solution is automated analysis of these communications, ideally in real time, which can turn disparate text and audio into actionable data and actionable recommendations.

The audio age: the renaissance of audio formats

Text communication is stagnating, while audio channels are growing at a double-digit rate:

  • Phone calls remain the fastest way to resolve complex or emotionally challenging situations - 71% of companies use them (source: Zendesk)
  • Online meetings have quadrupled since the pandemic and have become a common part of internal and external communications (source: Microsoft Teams, Zoom)
  • Over 460 million people listened to podcasts in 2024; corporate podcast popularity grew by over 60% year-over-year (Source: Statista, Edison Research)
  • Platforms like WhatsApp or Messenger handle billions of voicemails a day.
  • Audiobooks are heading for $15 billion in revenue by 2027.

People simply like to talk and expect companies to not only listen to their voice, but also to understand it.

The impact of customer experience on business

  • 55% of customers cite poor experience as the main reason for switching suppliers (source: PWC - Future of CX Report)
  • Customer experience-driven companies report revenue growth of 2-7% and profitability growth of 1-2% (source: McKinsey)
  • Advanced call analytics can shorten the problem resolution by up to 40% (source: McKinsey).

So there is a clear direction -> those who rely on CX (customer experience) grow faster and lose fewer customers.

How is AI changing customer care

Modern tools based on generative and large-scale language models (LLMs) provide a triple benefit:

  • Productivity - Implementing generative AI in customer care can increase productivity by 30-45% of the current cost of this function (source: McKinsey)
  • Quality - AI improves personalization and can increase overall satisfaction by 5-10%. 
  • Savings - Automating up to 80% of routine contacts reduces pressure on human agents and QA costs drop by more than 50% (McKinsey)

Why should you automate audio analysis

  • You will gain detailed insight into the needs and emotions of your customers.
  • You scale - you can analyse every call, not just a random sample.
  • You improve service quality with individual call analysis.
  • You reduce costs by eliminating manual processes.
  • You create a competitive advantage through data-driven decisions.

Typical use-cases

  • Generation of overview reports for management.
  • Realtime copilot: suggestions of answers for operators during a call.
  • Sentiment and tonal analysis for early detection of dissatisfaction.
  • Performance metrics for teams and individual agents.
  • Automatic evaluation of service quality.

What an AI-assisted audio processing pipeline might look like

Of course, it all starts with the audio recording. Then the recording must be processed, with a so-called Speech-to-text process, using Large Language Models (LLM). First we recognize the language(s) and then we create the transcript. In the next step, for example, sentiment and emotion analysis takes place (again using LLM and specialized models for this, such as Hume AI). In the penultimate step, we classify the topics from the conversation, extracting intentions or keywords or information that was heard during the conversation. Finally, everything is clearly visualized and integrated into business intelligence (BI) or custom reporting tools. 

Above we mention a relatively basic case of call analysis. However, it is of course possible to experiment with call analysis in various ways. For example, if you process calls using real-time AI, real-time data enrichment for a specific call from your own knowledge base (order statuses, previous communications, etc.) can also enter the analysis. In the last step, you can then update your knowledge base with the newly acquired information from the call. All these steps can save your operators or HR managers additional time.

Examples of some key technologies for speech-to-text processing

  • Deepgram - wide language support, speed.
  • Azure Speech - convenience, in the cloud, easy connection to other Azure services. 
  • Beey - optimized models for Czech language.
  • OpenAI Whisper - security, can run both online and offline. Open-source variants also do exist.

What to watch out for

  • Languages and dialects - make sure the model can handle your language(s) of choice (including regional nuances).
  • Price vs. speed - real-time operation requires low latency, which may cost more money.
  • Data protection - especially for sensitive calls, choose on-premise or GDPR-ready solutions. For example, OpenAI Whisper can be run entirely in-house, so sensitive data never leaves your company.
  • Customizable - for specific vocabularies (brand, product terminology), models that can be fine-tuned come in handy.

Always choose tools, models and procedures with regard to the nature of the information to be processed and the sensitivity of the data.

Conclusion

Automated analysis of customer communications, especially voice, is changing the game. Companies that can listen and respond in real time increase client satisfaction, reduce costs and gain an edge over the competition. Now is the time to give your customer voice an AI boost.

Need help implementing AI into your customer communications? Let us know, we'd love to help. 

Sources:

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