| # | Name | Parties | Matches |
|---|---|---|---|
| ParlGov | 26 | 26 | |
| Manifesto Project | 18 | 18 | |
| Mackie / Rose (1991) | 24 | 24 | |
| CHES | 11 | 11 | |
| EJPR PDY | 19 | 19 | |
| Kitschelt (2013) | 7 | 7 | |
| Huber / Inglehart (1995) | 6 | 6 | |
| Ray (1999) | 14 | 14 | |
| PPMD (2006) | 10 | 10 | |
| CLEA | 32 | 32 | |
| World Values Survey | 11 | 11 | |
| PolCon | 13 | 13 | |
| CHISOLS | 6 | 6 | |
| DPI | 8 | 8 | |
| Jennings / Wlezien | 8 | 8 | |
| Wikipedia | 26 | 26 | |
| Global Elections DB | 9 | 9 | |
| Elections Global | 15 | 15 | |
| IPOD | 12 | 12 | |
| MAPP | 15 | 15 | |
| CSES-IMD | 14 | 14 | |
| CCS | 14 | 14 | |
| PIP | 17 | 17 | |
| Mudde (2007) | 5 | 5 | |
| The PopuList | 9 | 9 | |
| V-Party | 11 | 11 | |
| POPPA | 11 | 11 | |
| TAP | 8 | 8 | |
| GPD | 3 | 3 | |
| PPMD (all) | 10 | 10 | |
| ESS prtc* | 26 | 26 | |
| ESS prtv* | 25 | 25 | |
| GPS 2019 | 10 | 10 | |
| NPED | 14 | 14 | |
| WhoGov | 5 | 5 | |
| EU-NED | 16 | 16 | |
| Wikipedia tags | 23 | 23 | |
| Poll of Polls | 9 | 9 |