Purpose: Consumers have always sought convenience and relevant channel options, such as physical stores, online shops, applications, and social networks, among others (Hossain et al., 2020; Wind et al., 2003). In this way, omnichannel emerges as a retail strategy to provide a seamless experience, where all channels are combined or integrated to enhance consumer experience and company performance (Lazaris & Vrechopoulos, 2014; Lee, 2020). This poses a challenge for organizations to meet current market demands and remain competitive (Lee et al., 2019). Advanced technologies to predict and better respond to buyers' preferences drive the crucial role that personalization can play in the omnichannel context, as channel integration has significant potential to provide more personalized information and enhance consumer experience (Hänninen et al., 2018; Shi et al., 2020; Thaichon et al., 2024). Therefore, it is relevant to understand the impact that channel integration quality can have on the perception of personalization among omnichannel brand/retailer customers. Personalization is the organization's competence to collect, analyze, and utilize personal data to proactively recommend and alter offerings, aiming to enhance personal relevance (Piccoli et al., 2017) by providing consumers with individualized attention and tailored service (Shi et al., 2020). Thus, the perception of personalization can create and maintain a more customeroriented omnichannel system (Alang & Nguyen, 2022), making it relevant to understand the influence it has on consumer experience. However, for personalization to generate value, buyers need to perceive it as personally beneficial to themselves (Alimamy & Gnoth, 2022). According to the Marketing Science Institute (2020), it is relevant to investigate strategies that prioritize customer value at all touchpoints during the omnichannel journey. Similarly, it is necessary to further explore the role of personalization in the omnichannel context (Tyrväinen et al., 2020), since although several studies have sought to explain the effects of personalization, the literature presents inconclusive results. Studies have concluded that personalization has a positive influence on perceived value (Sharma & Fatima, 2024), but can cause risks that have a negative impact on shopping intention (Shi et al., 2020). Findings indicate that personalization has a positive impact on the emotional and cognitive components of the customer experience (Rahmawati & Arifin, 2022; Tyrväinen et al., 2020). However, Zhang et al. (2024) concluded that personalization doesn’t have a positive effect on the utilitarian customer experience. To contribute to the development of knowledge on the omnichannel theme and from the perspective of the customer who purchases from the same retailer through online and offline channels, this study aims to explore the influence of channel integration quality on perceived personalization. Also, the impact of perceived personalization on perceived value and on the affective and cognitive dimensions of the consumer experience. Additionally, this study explores the mediating role of perceived personalization, on one hand, between channel integration quality and consumer experience, and on the other hand, between channel integration quality and perceived value. Methodology: The conceptual framework and research hypotheses were developed based on the analysis of the literature on the topic. Through an online questionnaire, 390 valid responses from Portuguese buyers of omnichannel brands/retailers were collected, and a structural equation model was estimated using AMOS 29 software. Results: The results show that channel integration quality has a positive effect on perceived personalization, while this perception has a positive influence on consumer experience, more significantly on the affective component. Contrary to expectations, perceived personalization does not have a significant effect on perceived value. It was also found that perceived personalization plays a mediating role between channel integration quality and consumer experience. Research limitations: The limitations are related to the adopted methodology, as a nonrandom convenience and snowball sample was used. The data is cross-sectional and collected only in Portugal. The study was applied to omnichannel brands/retailers from various sectors and industries. Originality: This study contributes to the development of literature in understanding the role that personalization can play in the development of the omnichannel experience. The results obtained raise pertinent questions for omnichannel retail practice. It has been proven that perceived personalization positively influences consumer experience, but it does not have a significant impact on perceived value. A possible justification for this result may be the fact that consumers show doubts regarding the privacy of their personal information, revealing the need to strengthen this dimension of channel integration quality. This presents a challenge for retailers, as while personalization can enhance customer experience, retailers must decide the level of personalization, to prevent privacy issues that may attenuate the benefits of personalization (Thaichon et al., 2024). Offering specific rewards based on consumer purchase history and personal information may contribute to increased perceived value. The importance of personalization perception in the omnichannel consumer experience is highlighted, as consumer experience is decisive in consumer satisfaction and repeat purchase intention (Rahman et al., 2022; Rahmawati & Arifin, 2022), consolidating loyalty to the omnichannel brand/retailer. In conclusion, personalization can be perceived as something positive, resulting from the practice of one-to-one marketing. On the other hand, it can be perceived as something negative, associated with the abusive use of data collected during the omnichannel shopping journey. [ABSTRACT FROM AUTHOR]