| # | Name | Parties | Matches |
|---|---|---|---|
| Mudde (2007) | 5 | 5 | |
| Elections Global | 25 | 25 | |
| DPI | 25 | 25 | |
| Laver / Hunt | 11 | 11 | |
| Global Elections DB | 24 | 24 | |
| WhoGov | 22 | 22 | |
| EU-NED | 24 | 24 | |
| PAGED | 24 | 24 | |
| Wikipedia | 39 | 39 | |
| PIP | 21 | 21 | |
| Huber / Inglehart (1995) | 9 | 9 | |
| IPOD | 21 | 21 | |
| The PopuList | 5 | 5 | |
| Leaders Global | 11 | 11 | |
| CSES-IMD | 13 | 13 | |
| ESS prtv* | 28 | 28 | |
| Manifesto Project | 28 | 28 | |
| PPMD (all) | 19 | 19 | |
| Ray (1999) | 15 | 15 | |
| EP roll call votes | 14 | 14 | |
| GPS 2019 | 10 | 10 | |
| ESS prtc* | 20 | 20 | |
| PPEPE (2021) | 6 | 6 | |
| Kitschelt (2013) | 12 | 12 | |
| POPPA | 13 | 13 | |
| CCS | 17 | 17 | |
| Mackie / Rose (1991) | 33 | 33 | |
| EJPR PDY | 23 | 23 | |
| V-Party | 27 | 27 | |
| EPAC (2018) | 13 | 13 | |
| KUREP (2012) | 13 | 13 | |
| PPDB (2017) | 12 | 12 | |
| euandi (GPS) | 12 | 12 | |
| EES 2014 | 12 | 12 | |
| CLEA | 46 | 46 | |
| PolCon | 29 | 29 | |
| Poll of Polls | 20 | 20 | |
| TAP | 5 | 5 | |
| Jennings / Wlezien | 8 | 8 | |
| NPED | 21 | 21 | |
| ERDDA (2013) | 21 | 21 | |
| PPMD (2006) | 11 | 11 | |
| ParlGov | 40 | 40 | |
| Morgan (1976) | 12 | 12 | |
| MAPP | 19 | 19 | |
| Wikipedia tags | 36 | 36 | |
| CHISOLS | 27 | 27 | |
| CHES | 22 | 22 |