| # | Name | Parties | Matches |
|---|---|---|---|
| Elections Global | 26 | 26 | |
| DPI | 21 | 21 | |
| Global Elections DB | 21 | 21 | |
| WhoGov | 19 | 19 | |
| OPAMED | 1 | 1 | |
| EU-NED | 54 | 54 | |
| PAGED | 20 | 20 | |
| ARPD | 2 | 2 | |
| Wikipedia | 48 | 48 | |
| PIP | 19 | 19 | |
| Huber / Inglehart (1995) | 7 | 7 | |
| The PopuList | 11 | 11 | |
| Leaders Global | 13 | 13 | |
| CSES-IMD | 6 | 6 | |
| ESS prtv* | 113 | 113 | |
| Manifesto Project | 28 | 28 | |
| PPMD (all) | 15 | 15 | |
| GPD | 3 | 3 | |
| GPS 2019 | 10 | 10 | |
| ESS prtc* | 38 | 38 | |
| PPEPE (2021) | 4 | 4 | |
| Kitschelt (2013) | 7 | 7 | |
| POPPA | 8 | 8 | |
| EJPR PDY | 29 | 29 | |
| V-Party | 27 | 27 | |
| EPAC (2018) | 10 | 10 | |
| KUREP (2012) | 10 | 10 | |
| euandi (GPS) | 7 | 7 | |
| EES 2014 | 8 | 8 | |
| CLEA | 23 | 23 | |
| PolCon | 13 | 13 | |
| Poll of Polls | 16 | 16 | |
| TAP | 6 | 6 | |
| ERDDA (2013) | 22 | 22 | |
| PPMD (2006) | 8 | 8 | |
| World Values Survey | 4 | 4 | |
| ParlGov | 47 | 47 | |
| MAPP | 15 | 15 | |
| Wikipedia tags | 26 | 26 | |
| CHISOLS | 7 | 7 | |
| CHES | 23 | 23 |