eRank vs Serpvox
| eRank | Serpvox | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | Yes |
| Paid from | $5.50/mo | €19/mo |
| Open source | No | No |
| Platforms | extension, Web | Web |
| Free plan | Yes | Yes |
| Paid from | 5.5 /mo | — |
| Keyword difficulty | Yes | Yes |
| Search volume data | Yes | Yes |
| SERP analysis | Yes | Yes |
| Competitor keywords | Yes | — |
| Search intent data | — | Yes |
| Keyword results limit | — | 100 keywords/search |
Both are listed in Best Keyword Research Tools. On Freedom251, eRank scores higher on our published basis.