Sei Blockchain Abandons Cosmos for EVM-Only Future—Here’s Why It Matters

Sei just dropped a bombshell: it’s cutting ties with Cosmos to go all-in on Ethereum Virtual Machine (EVM) compatibility. The move signals a sharp pivot toward Ethereum’s dominant ecosystem—and away from its interoperable roots.

Why the shift? EVM’s network effects are undeniable. With 90%+ of smart contracts built for Ethereum, Sei’s betting that ditching Cosmos SDK for EVM will lure developers—and their TVL—away from rivals like Solana and Avalanche.

But at what cost? The blockchain’s Cosmos-based validators now face obsolescence, and purists will scream ’betrayal.’ Meanwhile, Ethereum maxis are already cracking open the champagne—another chain falls to EVM’s gravitational pull.

One thing’s certain: in crypto, even ’decentralized’ roads eventually lead to Ethereum. Cue the eye-rolls from finance bros still waiting for their ’multi-chain future’ bags to moon.

Sei’s EMV-only plan

Sei is one of the high-ranking blockchains in terms of throughput, thanks to its parallel transaction handling design.

Since 2024, it has supported Cosmos and EVM users and enabled interoperability between applications and protocols across the two systems. 

However, according to Philip Su, SEI Labs’ engineering lead, the current design has led to an infrastructure burden and complex codebase. 

Besides, the team argued that the EVM usage was comparatively higher than Cosmos. Per Dune Analytics data, at the peak of December 2024, there were 162x (324,000 users) more EVM users than Cosmos (2000). 

Source: Dune Analytics 

In April 2025, there were 2.5x more Sei EVM users than Cosmos. Overall, EMV outpaced Cosmos users. 

However, the community reactions were mixed. Some supported the proposal, citing the above low Cosmos usage. But some were worried about how they would bridge their Cosmo-based crypto assets. 

One user, Wangman, implored, 

“Hope they build a bridge for those who have built on the OG side. Our entire collection isn’t on EVM. WOULD this proposal create a tool for migration? Our collection, our staking system.”

That said, Sei has seen increased investor confidence, going by the growth in TVL (total locked value).

Per DeFiLlama, the TVL has tripled from $160 million to $480 million between October 2024 and May 2025. 

Source: DeFiLlama

The altcoin’s market interest has also improved. According to Dune Analytics, new Sei users surged from 35K to 85K in the past three weeks.

This growth was reflected in the price, too, which rallied 72% from the April lows to over $0.22. 

Although it gave back some gains in May, bulls defended the $0.18-$0.20 support. If the level holds, an extended rally to $0.25 could be feasible. 

Source: SEI/USDT, TradingView