| # | Name | Parties | Matches |
|---|---|---|---|
| Manifesto Project | 34 | 34 | |
| ParlGov | 51 | 51 | |
| Wikipedia | 51 | 51 | |
| CHES | 17 | 17 | |
| CLEA | 23 | 23 | |
| EJPR PDY | 27 | 27 | |
| CHISOLS | 24 | 24 | |
| DPI | 27 | 27 | |
| Kitschelt (2013) | 8 | 8 | |
| PolCon | 29 | 29 | |
| PPMD (2006) | 7 | 7 | |
| World Values Survey | 3 | 3 | |
| CSES | 8 | 8 | |
| EPAC (2018) | 17 | 17 | |
| ERDDA (2013) | 21 | 21 | |
| euandi (GPS) | 8 | 8 | |
| Global Elections DB | 26 | 26 | |
| KUREP (2012) | 8 | 8 | |
| Mudde (2007) | 1 | 1 | |
| PIP | 27 | 27 | |
| The PopuList | 7 | 7 | |
| EES 2014 | 7 | 7 |