Gas and Electricity Data Hub
December 17, 2018

Data Hub is a digital environment for data exchange in the gas and electricity markets for the purpose of changing open suppliers, forwarding and storage of gas and electric power meter data between market participants, performing the obligations imposed on market participants by the law and ensuring the rights granted to them. The Data Hub contains definitions for all market participants operating in the Estonian electricity market, as well as all metering points tracking the transfer of gas and electricity between market participants.
Works done:
IT analysis (business and system analysis)
System architecture
UX and design
Software development
Testing
Technical documentation
Project management
The scope of work included the further development of existing functionalities
Technologies used: Java, CentOS, MySQL, Tomcat, Hibernate, Git, OWASP Level 2B
Latest Projects

Visit Estonia’s Smart AI Chatbot
October 14, 2025
Estonia’s official tourism portal, visitestonia.com, recently received an upgrade that makes visiting the site much more convenient. The platform now greets its visitors with an AI-powered chatbot developed by Krabu Grupp. This new solution helps users quickly and easily find answers to questions related to travel, destinations, events, and everything else connected to exploring Estonia.
Client need: less searching, more clarity
The Visit Estonia team faced a challenge: the portal contains a vast amount of content, but not every visitor knows where to start or how to quickly find the information they need. Many users access the site via mobile devices, in different languages and from various time zones — which means help must be available anytime, anywhere.
They needed a solution that would let users find answers on their own, without having to browse through dozens of pages or send emails.
The solution: a smart chatbot that works around the clock
Krabu Grupp built a solution that works like a helpful virtual guide. When a user scrolls the page and sees the chat icon, they can open it and ask a question such as:
• “What festivals are happening in November?”
• “Where can I find vegan food in Tallinn?”
• “When is the best time to visit Soomaa National Park?”
The chatbot searches existing articles and databases for the answer and delivers a clear and concise response. If needed, it also links to specific pages with more information.
The conversation is personal, simple, and smooth — and it works on all devices, 24/7. If the user temporarily loses internet connection, the chatbot notifies them and patiently waits until the connection is restored.
A user-friendly and natural part of the website
It was important that the new solution wouldn’t distract users but instead feel like a natural part of the site. That’s why the chat window is designed to be simple, discreet, and visually aligned with Visit Estonia’s overall design. All messages are clearly displayed, with timestamps and brand-specific details.
The chatbot also meets accessibility requirements — making it easy to use on mobile, for people with visual impairments, or those who rely on screen readers.
The result: more satisfied visitors and easier access to answers
The new chatbot now helps millions of international users better understand and explore Estonia. As a result, the portal becomes not only an informative resource but also an engaging and user-friendly tool that supports Estonia’s image as a smart and welcoming travel destination.
Would you like a similar solution for your website?
Get in touch: info@krabu.ee

Tallinna Linnatransport – Renewal of the Intranet and Public Website
August 19, 2025
Challenge
Tallinna Linnatransport (TLT) needed a complete overhaul of both its intranet and public website. The new solution had to be user-friendly, secure, accessible, and meet the needs of diverse target groups – from citizens to employees and business partners.
Solution
Krabu Grupp carried out a comprehensive renewal project which included:
• creating a new design framework in line with TLT’s brand guidelines;
• developing a user-centered Mega Menu and personalized homepage views for different user groups;
• adding modern features such as ID-card, Mobile-ID and Smart-ID login, dark mode, and dynamic submenus;
• ensuring mobile-friendly responsive design and multilingual support (Estonian, English, Russian);
• implementing accessibility improvements in line with international standards;
• optimizing site performance (lazy loading, CSS/JS minification, caching, server-side rendering) and strengthening security with a multi-layered protection system.
Result
The renewed website provides TLT with:
• significantly improved user experience across all devices,
• smooth and fast navigation through the Mega Menu and personalized views,
• secure and reliable access to internal information,
• better visibility in search engines thanks to technical optimization.
With the new solution, TLT can offer employees, customers, and partners a clear, trustworthy, and convenient digital channel that supports daily operations and strategic goals.