ETH vs. SEI: Can Sei outperform Ethereum in the second half of 2025?

An analysis report compared the price movement of Sei Network (SEI) and Ethereum (ETH) in 2025. While Ethereum demonstrated its inherent resilience, SEI experienced a more turbulent price movement, but technical patterns indicate that SEI has a higher potential rise in the second half of the year. On the fundamental side, Ethereum wins with its dominance and infrastructure upgrades, while SEI shows a higher short-term risk-reward potential with faster relative growth and ecological expansion.

Technical Outlook: Symmetrical Triangle Indicates Bullish

(Source: TradingView)

From a technical chart perspective, the price of SEI is operating within a symmetrical triangle pattern, which typically indicates a strong breakout. Currently, its price is testing the resistance of the upward trend line of this pattern. If it can decisively break through this level, it may trigger a significant rise, with considerable potential gains. Even if the price further consolidates, this pattern remains favorable for bulls.

(Source: TradingView)

Similarly, the price of Ethereum is testing the resistance of its ascending trendline in the triangle pattern. If it breaks through, it could push the price to higher points; even if it enters consolidation, the upward target remains clear. From a technical perspective, the potential percentage rise of SEI seems to be higher than that of Ethereum, which gives it the possibility to outperform in USD terms.

Fundamentals: Ethereum's Moat vs. Sei's Rapid Rise

• Ethereum: Ethereum is steadily advancing through its long-term scaling roadmap, with recent developments including the leanVM execution environment optimized for the zkVM ecosystem, and SNARK-based consensus research aimed at reducing latency. In terms of adoption, Ethereum's DeFi ecosystem boasts a huge total locked value (TVL), and the supply of stablecoins on the network continues to grow. Thanks to Layer-2 scaling solutions, Ethereum's daily activity has reached new highs, and the momentum of institutional funds flowing into its ETF and staking products remains strong.
• Sei Network: Sei Network has chosen a different path, focusing on achieving interoperability through EVM compatibility. After launching Seiscan and an EVM-specific architecture, its daily EVM transaction volume and active users have significantly risen, according to DappRadar data. Sei's ecosystem is rapidly expanding in the gaming and DeFi sectors, with its stablecoin issuance also experiencing explosive growth. Additionally, the integration with Chainlink further enhances the network's reliability, with its unique wallet and daily transaction volume reaching millions.

Conclusion: Who is the better one?

Ethereum remains the dominant Layer-1 blockchain, with its scale, institutional participation, and ongoing infrastructure upgrades continually consolidating its position. In contrast, Sei shows faster relative growth in terms of activity, ecosystem expansion, and stablecoin adoption, and its technical shape also suggests stronger short-term upward potential.

ETH provides resilience and long-term credibility, while SEI offers an attractive option for traders seeking higher risk and higher returns. The key is whether Sei can maintain its growth momentum after speculative rises, while Ethereum focuses on its scalability and integration with global finance.

Conclusion

The choice between Ethereum and Sei depends on the investor's risk appetite and investment time horizon. ETH remains the safe cornerstone of the market, while SEI's high growth potential makes it a competitor worth watching. This battle for dominance will continue to unfold on both the technological and fundamental fronts.