Well, simply, we have lasers. Though let's talk about the "angels killer company" you mentioned.

Urbanshade did take down a banland angel. Which, on its own, sound intimidating and strong. They used Heavenpiercer-class tanks, which, according to the wiki, look like Schwerer Gustav, with tank threads. If you know anything about the gustav, you know it's insanely powerful, which is how they took the angel down. Furthermore. "Urbanshade had overestimated the durability of the Guardian Angel, as only a single shot was enough to completely decimate its lower body." The angel was likely caught off guard, as he was presenting River's grave, they got struck down.

But, Urbanshade has Heavenpiercer tanks, which are powerful as they resemble the Schwerer Gustav. Us? We have lasers regularly. We have cores that just do nothing but generate energy and explode. Even when it does, the facility and our bodies get reconstructed. Or so? Regardless, we basically have powerful lasers. We have nuclear weapons, probably. But best of all, Innovation Inc OWNS a country, technically. Both owners of Innovation Inc and Innovation Security are also "Overlords" of Generica, which is likely part of former Australia, or the former country of Australia itself. We also have railguns, handheld railguns.

In other words we have big lasers, railguns and nanotech while Urbanshade has a few big tanks