This article theorizes equality and inclusion in coproduction, from the perspective of public administrators. Coproduction may occur across the policy cycle and at the individual, group, and collective levels, and for reasons of both instrumentality (such as improved efficiency) and normativity (such as democracy). Participation of the disadvantaged in various modes of coproduction is essential if the solidarity principle (stipulating prioritization of those in greatest need) is to be taken seriously. However, their access may be hindered due to external exclusion (not having a place) and internal exclusion (not having a say). Whether inclusion of the disadvantaged is argued for in terms of sameness or difference, different reasons are addressed: justice (for the former) as well as additional perspectives and resources (for the latter). Policymakers and practitioners need to recognize that strategies of equality are likely to differ at various levels and modes of coproduction.