ContentSERP vs FlexQueries
| ContentSERP | FlexQueries | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | Yes | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | api, Web | Web |
| Free plan | Yes | No |
| Keyword gap analysis | Yes | Yes |
| Backlink analysis | Yes | Yes |
| Content gap analysis | Yes | Yes |
| Historical data | limited | limited |
| API access | Yes | — |
Both are listed in Best Competitor SEO Tools. On Everything Xiaomi, ContentSERP scores higher on our published basis.