| # | Name | Parties | Matches |
|---|---|---|---|
| ParlGov | 35 | 35 | |
| Manifesto Project | 9 | 9 | |
| ERDDA (2013) | 15 | 15 | |
| Morgan (1976) | 4 | 4 | |
| Mackie / Rose (1991) | 27 | 27 | |
| CHES | 7 | 7 | |
| EJPR PDY | 10 | 10 | |
| Ray (1999) | 8 | 8 | |
| PPMD (2006) | 6 | 6 | |
| CLEA | 32 | 32 | |
| Janda (1980) | 4 | 4 | |
| EES 2014 | 6 | 6 | |
| PolCon | 11 | 11 | |
| DPI | 10 | 10 | |
| Wikipedia | 23 | 23 | |
| Global Elections DB | 11 | 11 | |
| Laver / Hunt | 5 | 5 | |
| euandi (GPS) | 8 | 8 | |
| Elections Global | 21 | 21 | |
| EP roll call votes | 4 | 4 | |
| IPOD | 9 | 9 | |
| CCS | 8 | 8 | |
| PIP | 9 | 9 | |
| Mudde (2007) | 3 | 3 | |
| The PopuList | 4 | 4 | |
| V-Party | 21 | 21 | |
| POPPA | 7 | 7 | |
| TAP | 4 | 4 | |
| PPMD (all) | 7 | 7 | |
| ESS prtc* | 7 | 7 | |
| ESS prtv* | 7 | 7 | |
| GPS 2019 | 9 | 9 | |
| NPED | 7 | 7 | |
| WhoGov | 5 | 5 | |
| Leaders Global | 5 | 5 | |
| PPEPE (2021) | 2 | 2 | |
| PAGED | 15 | 15 | |
| EU-NED | 16 | 16 | |
| Wikipedia tags | 11 | 11 | |
| Poll of Polls | 8 | 8 | |
| PopulisTree | 1 | 1 |