| # | Name | Parties | Matches |
|---|---|---|---|
| Manifesto Project | 31 | 31 | |
| ParlGov | 36 | 36 | |
| Wikipedia | 54 | 54 | |
| CHES | 14 | 14 | |
| CLEA | 21 | 21 | |
| EJPR PDY | 13 | 13 | |
| V-Party | 51 | 51 | |
| CHISOLS | 14 | 14 | |
| DPI | 22 | 22 | |
| ESS prtc* | 13 | 13 | |
| ESS prtv* | 13 | 13 | |
| Huber / Inglehart (1995) | 10 | 10 | |
| Kitschelt (2013) | 6 | 6 | |
| PolCon | 17 | 17 | |
| PPMD (2006) | 7 | 7 | |
| World Values Survey | 8 | 8 | |
| CCS | 14 | 14 | |
| CSES-IMD | 25 | 25 | |
| Elections Global | 41 | 41 | |
| EPAC (2018) | 10 | 10 | |
| ERDDA (2013) | 19 | 19 | |
| euandi (GPS) | 9 | 9 | |
| Global Elections DB | 13 | 13 | |
| Jennings / Wlezien | 7 | 7 | |
| KUREP (2012) | 10 | 10 | |
| MAPP | 40 | 40 | |
| Mudde (2007) | 2 | 2 | |
| PIP | 17 | 17 | |
| POPPA | 6 | 6 | |
| TAP | 6 | 6 | |
| The PopuList | 6 | 6 | |
| EES 2014 | 3 | 3 |