Informers in the service of state secret police collaborate with authorities and thus contribute to the power of repressive regimes. Through a case-study of Communist Czechoslovakia (1945–1989)—and drawing from secret police archives– this article presents selected stories of informers who in one way or another also ‘resisted’ collaboration with the Czechoslovak State Security (StB). By doing so, we try to further complexify the notions of ’everyday resistance’, on the one hand, and ‘collaboration’ on the other. We demonstrate that resistant acts, similar to collaborative acts, can be apolitically devoid of ideology, highly idiosyncratic, and motivated by private drivers. Informing can be a tool of social navigation—namely, making the most out of one’s circumstances—in repressive times. Hence, resisting while informing also can be approached as a method for an individual to maximize opportunities within the overlapping incentives—both public and private, personal and professional—that contour decision-making and social action in repressive regimes.