See main article: 2021 Almaty Challenger.
Andrej Martin and Hans Podlipnik Castillo were the defending champions[1] but chose not to defend their title.
Jesper de Jong and Vitaliy Sachko won the title after defeating Vladyslav Manafov and Evgenii Tiurnev 7–6(7–4), 6–1 in the final.