What Is Today’s Update for SEI? Understanding SIP-3 and SEI’s Move Toward an EVM-Only Future
2025-05-14
Today’s update from Sei Network centers on a critical evolution in its protocol direction: SIP-3 (Sei Improvement Proposal 3).
This proposal, which has stirred significant attention within the Sei community, outlines a bold plan to transition SEI into a fully Ethereum Virtual Machine (EVM)-only chain.
This strategic shift seeks to eliminate the current dual-VM environment—where CosmWasm and EVM coexist—streamlining the developer and user experience by focusing entirely on the EVM stack.
According to Sei Network, SIP-3 is designed to reduce cognitive overhead, minimize integration complexity, and position SEI more effectively within the broader EVM ecosystem, where tooling, adoption, and developer familiarity are already robust.
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Why SIP-3 Matters
SEI has historically differentiated itself by offering parallelized execution and high performance while attempting to balance the strengths of CosmWasm and EVM.
However, as the blockchain space matures, the overhead of maintaining two smart contract environments has become increasingly apparent.
SIP-3 proposes to eliminate the duality, consolidating resources and development into a singular EVM-compatible framework.
This would allow developers to build faster, with fewer cross-compatibility concerns, and foster deeper integration with EVM-native tooling, libraries, and infrastructure.
This proposed change is not merely technical; it represents a directional realignment of the Sei protocol’s identity—leaning toward broader interoperability and developer onboarding efficiency by speaking the lingua franca of web3: Solidity and the EVM.
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Community Engagement: Builder Office Hours
To promote transparency and gather feedback, Sei Network held a Builder Office Hours session on May 14, hosted on their @BuildWithSei X account. This session served as a live forum to unpack the reasoning, implications, and projected outcomes of SIP-3.
Participants included developers, core contributors, and community stakeholders, all contributing questions and perspectives around the proposal.
Topics ranged from migration paths for existing CosmWasm projects to the performance expectations of the proposed EVM-only chain.
The event highlighted Sei’s ongoing commitment to decentralized governance and open dialogue—core tenets as the network navigates major infrastructural decisions.
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What’s Next?
As with all Sei Improvement Proposals, SIP-3 will go through further community review, feedback cycles, and eventually a governance vote.
If passed, SEI would begin the transition to fully adopt EVM as its foundational execution environment.
While the implications are substantial, the move aligns SEI with broader trends across modular and L2 ecosystems where performance, developer usability, and tooling compatibility are prioritized.
Conslusion
SIP-3 marks a pivotal moment for Sei Network—a shift away from its dual-VM structure toward a unified, EVM-only architecture.
The proposal reflects an ambition to simplify development, lower friction for users and builders, and harness the full power of the EVM ecosystem.
Through community-driven dialogue and formal governance, SEI is positioning itself to better align with the modular blockchain future.
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FAQ
1. What is SIP-3 in simple terms?
SIP-3 is a proposal to make SEI an EVM-only blockchain, removing support for CosmWasm. This would streamline the platform and reduce complexity for developers and users alike.
2. Why remove CosmWasm support?
Maintaining multiple virtual machines introduces technical overhead and can complicate development. By focusing on EVM alone, SEI aims to improve performance and compatibility with the broader Ethereum ecosystem.
3. Will current CosmWasm projects be affected?
Yes, existing CosmWasm-based smart contracts would need to be migrated or redeployed on the EVM. Migration tools or support plans are expected to be shared if the proposal is approved.
4. How does this benefit developers?
An EVM-only chain simplifies the toolset, reduces friction, and allows developers to use widely adopted languages and frameworks like Solidity, Hardhat, and MetaMask with full compatibility.
5. Is SIP-3 already live?
No, SIP-3 is currently in the discussion and feedback phase. A formal vote by the community will determine whether the proposal is enacted.
Disclaimer: The content of this article does not constitute financial or investment advice.
