What I miss from Pocket and not found on Instapaper: Full Webpage "archival"/download instead of the reader mode. Instapaper's reader mode doesn't work with HN/

What I miss from Pocket and not found on Instapaper: Full Webpage "archival"/download instead of the reader mode. Instapaper's reader mode doesn't work with HN/Twitter. I'm aware of Polar (haven't tried it though). But is there another alternative? Or is it possible to self-host/build a similar thing?