Yes words have meaning. You should read original comment again . The OP said closed source,he didn’t say not open source or FOSS or source available . Of all

Yes words have meaning. You should read original comment again . The OP said closed source,he didn’t say not open source or FOSS or source available . Of all the three, redis is only one with closed source components classifying redis as open and ES , mongoDB as closed is misleading and false . Either all three are in grey area if you are purist, or all three are shades of open if you are a realist . none of the restrictions are relevant to the vendor lock-in point he was making Also OSI doesn’t own the word [1] Open source or the open source movement. Classifying ES and mongoDB in the same category as Oracle is just not helping vendors to be open . [1] trademark or copyright perhaps , not the word or concept or the movement .