| # | Name | Parties | Matches |
|---|---|---|---|
| ParlGov | 42 | 42 | |
| Manifesto Project | 17 | 17 | |
| ERDDA (2013) | 16 | 16 | |
| Mackie / Rose (1991) | 46 | 46 | |
| CHES | 17 | 17 | |
| EJPR PDY | 22 | 22 | |
| Kitschelt (2013) | 5 | 5 | |
| KUREP (2012) | 5 | 5 | |
| Ray (1999) | 9 | 9 | |
| PPMD (2006) | 4 | 4 | |
| CLEA | 50 | 50 | |
| Janda (1980) | 4 | 4 | |
| EES 2014 | 8 | 8 | |
| PolCon | 18 | 18 | |
| CHISOLS | 34 | 34 | |
| DPI | 10 | 10 | |
| Jennings / Wlezien | 9 | 9 | |
| Wikipedia | 75 | 75 | |
| Global Elections DB | 29 | 29 | |
| Laver / Hunt | 4 | 4 | |
| euandi (GPS) | 12 | 12 | |
| Elections Global | 60 | 60 | |
| EP roll call votes | 8 | 8 | |
| IPOD | 10 | 10 | |
| CSES-IMD | 10 | 10 | |
| CCS | 8 | 8 | |
| PIP | 16 | 16 | |
| Mudde (2007) | 5 | 5 | |
| The PopuList | 11 | 11 | |
| V-Party | 63 | 63 | |
| POPPA | 10 | 10 | |
| TAP | 9 | 9 | |
| GPD | 2 | 2 | |
| PPMD (all) | 5 | 5 | |
| ESS prtc* | 15 | 15 | |
| ESS prtv* | 17 | 17 | |
| GPS 2019 | 8 | 8 | |
| NPED | 8 | 8 | |
| WhoGov | 8 | 8 | |
| Leaders Global | 13 | 13 | |
| PPEPE (2021) | 9 | 9 | |
| EU-NED | 30 | 30 | |
| Wikipedia tags | 65 | 65 | |
| Poll of Polls - Politico Europe | 16 | 16 |