Zenken Maximizes Sales Efficiency by Adopting ChatGPT Enterprise

Zenken is accelerating its web marketing and overseas human resources business by adopting ChatGPT Enterprise, which combines GPT-5, custom GPTs, and the latest OpenAI models. As a result of the adoption, weekly active usage exceeded 90%, and an average time savings of 30~50% was achieved in knowledge work tasks.

With security and support for complex thinking as core criteria, the company is now able to safely manage sensitive information through ChatGPT Enterprise, where data is not used for AI training. It also leverages the reasoning model to support executive-level decision-making, including market analysis, competitive strategy, and evaluation of new business opportunities.

Notable changes have also appeared in the sales process, as follows.

• Preparation stage: Shifted from manual information gathering to in-depth industry and customer analysis using ChatGPT
• Meeting stage: Able to provide immediate answers during meetings when questions arise
• Proposal stage: Evolved from product-centered proposals to customized proposals based on customer insights

Through these changes, the company achieved a 15~20% increase in initial screening pass rate, a 5~10% increase in new contract win rate, and an approximately 30% increase in final proposal approval rate.