poorva mimansa is atheistic    poorva mimansa is more atheistic than both buddhism and   jainism  let us see jainism do not entertains concept of god and buddha   remained his silence both for god and deities Later buddhist rejected god but not deities jainism do believes   in deities But in jainism these deities are not siddhas and can   only bestow material gains In mahayana even god can be   believed and in hinyana and even in therveda deities are not   rejected although here not much importance is given That in   buddhism deities are symbolic is modern interpretations or   propaganda  a more traditional buddhist believes in the   ontological existence of deities although deities are not so   important in dhamma In poorva mimansa the earliest document we have is Sabara   Bhasya a commentary on mimansa sutra attributed to rishi   jaimini Here only the ontological existence of deities is   refuted when Sabara writes  the vedic gods are mere words   and sounds  and there existence is not outside of vedas  No   modern propaganda  no atheistic interpretations done as done to   adwaita vedanta but the earliest resources itself is clear on its   starke athiesm Later mimansak remains doubtful over deities and   mimansak like Kumarila and Prabhakara wrote extensively to   refute the concept of god but maintained silence over deities In a nutshell Mimansa was more atheistic in origin over  buddhism   and jainism Today Vedanta is more famous among vedics and   i too find adwaita if i leave buddhism and jainism  more   interesting than Mimansa not that mimansa is lesser than any   other that  no no