Pretty much all the non-standard offers will be more expensive unless you jump thru their special hoops.

All the no-name providers are shell companies buying power from the same place the standard offer gets it and reselling it to you. Unless they can buy it for less than the state negotiates, you're going to end up paying more.

Most of them rely on you signing up for a teaser rate and forgetting (or being contractually locked in) when that ends.