| # | Name | Parties | Matches |
|---|---|---|---|
| Mudde (2007) | 5 | 5 | |
| Elections Global | 21 | 21 | |
| DPI | 11 | 11 | |
| Laver / Hunt | 10 | 10 | |
| Global Elections DB | 13 | 13 | |
| WhoGov | 11 | 11 | |
| EU-NED | 26 | 26 | |
| PAGED | 34 | 34 | |
| ParlSpeech | 17 | 17 | |
| Wikipedia | 56 | 56 | |
| PIP | 26 | 26 | |
| CCDD 2018 | 11 | 11 | |
| Huber / Inglehart (1995) | 9 | 9 | |
| IPOD | 23 | 23 | |
| Janda (1980) | 6 | 6 | |
| The PopuList | 10 | 10 | |
| Leaders Global | 12 | 12 | |
| CSES-IMD | 13 | 13 | |
| ESS prtv* | 23 | 23 | |
| Manifesto Project | 32 | 32 | |
| PPMD (all) | 17 | 17 | |
| Ray (1999) | 13 | 13 | |
| GPD | 2 | 2 | |
| EP roll call votes | 12 | 12 | |
| GPS 2019 | 10 | 10 | |
| ESS prtc* | 26 | 26 | |
| PPEPE (2021) | 6 | 6 | |
| Kitschelt (2013) | 9 | 9 | |
| POPPA | 13 | 13 | |
| CCS | 10 | 10 | |
| Mackie / Rose (1991) | 37 | 37 | |
| EJPR PDY | 18 | 18 | |
| V-Party | 20 | 20 | |
| KUREP (2012) | 11 | 11 | |
| PPDB (2017) | 11 | 11 | |
| euandi (GPS) | 12 | 12 | |
| EES 2014 | 9 | 9 | |
| CLEA | 38 | 38 | |
| PolCon | 23 | 23 | |
| Poll of Polls | 17 | 17 | |
| TAP | 7 | 7 | |
| Jennings / Wlezien | 12 | 12 | |
| NPED | 18 | 18 | |
| ERDDA (2013) | 28 | 28 | |
| PPMD (2006) | 9 | 9 | |
| World Values Survey | 11 | 11 | |
| ParlGov | 50 | 50 | |
| Morgan (1976) | 20 | 20 | |
| MAPP | 20 | 20 | |
| Wikipedia tags | 40 | 40 | |
| CHISOLS | 16 | 16 | |
| CHES | 17 | 17 |