Kairos Prison Ministry International, Inc. is the parent organization of a body of ministries addressing the spiritual needs of incarcerated men, women and children, to their families and to those who work in the prison environment. Kairos sprang from the Cursillo movement and is supported by volunteers from Cursillo and those other movements that consider Cursillo as their root. Although a separate ministry, Kairos has received the blessing and encouragement of 4th Day movements such as Cursillo, National Episcopal Cursillo, Presbyterian Cursillo, Lutheran Via de Cristo, The Upper Room's Walk To Emmaus, and independently ecumenical Tres Dias.  Kairos Prison Ministry is a ministry rather than a movement.

Kairos is a ministry of the church ... a ministry of the apostles whom Jesus, the Christ, has called into community and sent forth into the environment of the correctional institution. Kairos has been called the best example of the early church in existence today.