If I were you, I wouldn’t get too hung up on the amount of backlinks and referring domain to your competitors.
Instead, I would focus on just how authoritative and niche-specific their backlinks are.
Just because it looks daunting at first, it doesn’t necessarily mean that you're going to have a tough time overcoming your competitors—especially the one that has 2.43 million referring domains.
I would focus on content that they don't necessarily cover or they cover badly.
You need to distinguish your website first, and reverse-engineer your competitors’ keywords so you can pick their low-hanging fruit.
What I mean by that is you can run their domains through tools like Semrush to find their lower difficulty keywords.
Once you have all this information, create topics around them and build content that is more likely to rank.
The next step is to focus on value when it comes to your link building campaign.
I would steer clear of buying links or using PBNs. Instead, I’d focus on press releases.
Since you're a tech site, I would suggest that you do interviews or you do big data analysis.
These are the kinds of topics online newspapers and media outlets are after.
So, if you give them what they're looking for regarding a hot tech topic like blockchain technology and cryptocurrency, you might get a nice wave of high-quality backlinks from authoritative websites.
Normally, it’s hard to get links from those places.
This might give you the competitive advantage you need to overcome your competitors’ existing backlink profiles.