How do evaluators using collaborative approaches to evaluation (CAE) define success? This is the core question being asked in a further analysis of data from our previous work (Cousins, Whitmore, & Shulha, 2013 ; Shulha et al., 2016) that developed a set of evidence-based principles to guide collaborative evaluation practice. Probing data from 320 responses to our (2012) survey, we examined what respondents considered "highly successful" and "less successful than hoped" in their collaborative evaluation projects. The results revealed that evaluation use, relationships, and information needs are key factors. We propose a conceptual framework as an aid to thinking about success in CAE.