Let's be clear: Ethereum (CRYPTO: ETH) remains the top dog in the world of decentralized finance (DeFi), and in the world of basically anything utility-generating in the crypto world (having invented smart contracts helps with that). This has provided investors in Ethereum with among the largest moats in the crypto sector.

When one company (or in this case, crypto network) dominates the discussion in a high-growth area of the market, alternatives are bound to pop up. Competitors have certainly stepped up their game, with plenty of "Ethereum killers" being launched over the past five years, looking to take their own slice of this pie.

These alternative Layer-1 networks (those that are base-layer blockchain platforms, upon which other applications and Layer-2 networks are built) have had varied success in taking market share away from Ethereum in the DeFi space. However, there are a couple I'm going to highlight in this article that continue to be a thorn in the side of Ethereum loyalists. 

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Source Fool.com