| Function | Equinox | Nesstar | SDA |
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| Data file identification | |||
| Search for variables across data sets |  |
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| Search for variables within data sets | |
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| Descriptive statistics | |||
| Frequencies | |
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| Cross-tabulations | |
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| Means & standard deviations | |
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| Correlations | |
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| Measures of association and significance (chi-square, etc) | |
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| Graphic output (pie charts, bar charts, histograms, etc) | |
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| Quick tables | |
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| Inferential statistics | |||
| ANOVA | |
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| Multiple regression | |
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| Logit/probit regression | |
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| Measures of strength, direction, and significance | |
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| Design effects | |
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| Data management | |||
| Disclosure control | |
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| Recode | |
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| Compute new variables | |
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| Share recoded/computed variables | |
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| List cases | |
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| Weight cases | |
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| Filter | |
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| User uploaded data (self-archiving) | |
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| Downloading | |||
| Download recoded/computed variables | |
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| Subset | |
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| Ascii data & syntax file | |
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| Excel/csv file | |
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| System/portable file | [SPSS & Stata only] |
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| DDI-compliant metadata | |
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| Documentation and miscellaneous | |||
| DDI 1.0/2.0 compliant | |
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| Usage reports | |
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| Multiple language support (interface) | |
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| Swift resolution of problems, bugs, etc | |
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