Best Blockchain to Build On in 2026

Developer Guide

By the Sherlock team · March 10, 2026 · 9 min read

The Web3 universe shifted fast. In the last 12 months, Base captured nearly half of all L2 DeFi TVL, Solana moved Firedancer out of beta and is rolling Alpenglow toward mainnet activation, Sui's developer base grew 219% while its Move language attracted teams tired of Solidity's reentrancy footguns, and Ethereum shipped two major upgrades — Pectra in May adding smart-wallet capabilities via EIP-7702, and Fusaka in December introducing PeerDAS to dramatically scale blob capacity for rollups. The question every team building in 2026 is asking: which chain should I build on right now? This is what the data says, and why the answer in March 2026 looks materially different than it did a year ago.

Executive Summary

After auditing protocols across every major chain and watching where builder activity is actually concentrating in early 2026, three patterns are clear:

1. The L2 race consolidated to two leaders. Base holds 46% of all L2 DeFi TVL and captured 62% of total L2 revenue in 2025. Arbitrum holds $17 billion in TVL with the deepest DeFi ecosystem. Together with Optimism, they process roughly 90% of L2 transactions. If you are building on an EVM L2 in 2026, the question is which of these leading networks, not which of a dozen.

2. Solana is no longer "the fast cheap chain." It is a different development paradigm. Firedancer demonstrated 1 million TPS in testing and is now live on mainnet. Alpenglow targets finality of 100–150 milliseconds (down from ~13 seconds) and is expected on mainnet in Q1 2026. With 17,708 active developers and 83% year-over-year growth, Solana has its own gravitational pull now, and the teams building there are not building there because it is cheap. They are building there because the account model and parallel execution enable applications that are architecturally impossible on the EVM.

3. Security infrastructure should be your tiebreaker, not an afterthought. Over $3.4 billion was stolen across crypto in 2025. Access control vulnerabilities alone accounted for $953 million in damages. The cheapest chain to deploy on becomes the most expensive if your contract gets drained, and auditor availability, formal verification support, and battle-tested contract libraries vary dramatically between chains.

What Changed in the Last 12 Months

Before comparing chains, it is worth understanding what moved since early 2025, because several of these shifts change the calculus for new projects.

Ethereum shipped Pectra and Fusaka (May and December 2025). Pectra added 11 EIPs including EIP-7702, which lets EOAs temporarily execute smart contract code — making smart-wallet-style UX more native and practical, though not full account abstraction in one step. Pectra also doubled blob capacity for L2s and added BLS precompiles for cheaper onchain cryptography. Then in December, Fusaka went live with PeerDAS (EIP-7594), which removes the requirement that all nodes download and store all blob data, cutting validator bandwidth requirements by roughly 85% and paving the way for significantly more L2 throughput. Fusaka also raised the default block gas limit to 60 million and added secp256r1 precompile support (EIP-7951) for native P-256 signature verification. Together, these two upgrades meaningfully improved developer UX, L2 economics, and the foundation for future scaling.

Base became the default consumer L2. Morpho deposits on Base grew from $354 million to over $2 billion after Coinbase integrated Base directly into its main app. USDC daily active users hit 83,400 in November 2025, up 233% year-over-year. Base captured 62% of total L2 fee revenue in 2025, more than all other L2s combined.

Solana shipped Firedancer; Alpenglow is next. Jump Crypto's independent validator client moved out of beta, with lab tests showing over 1 million TPS on a single node. Over 20% of staked SOL now runs on Frankendancer (the hybrid transition client). The Alpenglow consensus upgrade, which passed community vote with 98% approval in September 2025 and hit testnet in late 2025, replaces proof-of-history with deterministic slot scheduling and targets finality of 100–150 milliseconds, down from approximately 13 seconds. Alpenglow is expected to reach mainnet in Q1 2026 but has not yet activated at the time of writing.

Sui's developer base tripled. 219% year-over-year growth made Sui the fastest-growing chain by developer count. The Move VM 2.0 upgrade reduced gas fees by 40%, and the 2026 roadmap includes a native Ethereum bridge and USDsui, Sui's first native stablecoin.

The Five Networks That Matter for Builders Right Now

There are dozens of smart contract platforms. Five have the combination of developer activity, liquidity, tooling, and security infrastructure that makes them viable for production protocols in 2026.

Ethereum mainnet remains the canonical choice for protocols that need maximum composability and the deepest security guarantees. 31,869 active developers. Over $120 billion in TVL. 44 million+ contracts deployed. The Solidity ecosystem has the deepest library of audited, battle-tested contracts (OpenZeppelin, Solady), the largest pool of experienced auditors, and the most mature formal verification tooling. Gas averages roughly $3.78 per transaction post-Fusaka. If your protocol needs to compose with Aave, Uniswap, Morpho, or the existing DeFi stack, this is still where you build. The tradeoff is cost and speed, and the reality that consumer-facing activity has largely migrated to L2s.

Base is where consumer-facing protocols should default in 2026. 46% of all L2 DeFi TVL ($4.63 billion). 62% of total L2 revenue. Coinbase's reported 9.3 million monthly active trading users as a potential distribution channel (though how directly that translates to Base app usage varies). Standard Solidity, standard Hardhat/Foundry tooling, sub-cent transaction fees, and the OP Stack under the hood. The Coinbase integration is what separates Base from every other L2: it is the only chain with a direct pipeline from a major exchange's user base to your protocol's front end. For payment apps, social tokens, onchain games, or anything where onboarding non-crypto-native users matters, Base has the strongest distribution advantage in Web3. The risk is centralization around Coinbase's single sequencer, and the ecosystem is younger than Arbitrum's with fewer battle-tested DeFi primitives.

Arbitrum is the default for complex DeFi. $17 billion TVL, the highest among all L2s. 35.3% L2 market share. Over $85 million in active grants. The DeFi ecosystem is the deepest of any L2: GMX, Camelot, and major Uniswap deployments live here. Arbitrum's multi-round interactive fraud proof system is more mature than Base's single-round approach. The Stylus Sprint program offers 5 million ARB in grants for writing contracts in Rust, C, or C++ compiled to WASM alongside traditional Solidity, a meaningful differentiator for teams that want EVM compatibility with Rust's safety properties. If you are building perpetuals, structured products, lending markets, or anything that needs to compose with deep DeFi liquidity at lower fees than mainnet, Arbitrum is the chain. Transaction fees range from $0.05 to $0.30.

Solana is for teams building applications that are architecturally impossible on the EVM. 17,708 active developers, 83% year-over-year growth, $40 billion TVL. The account model lets programs execute in parallel across non-overlapping state, which is why high-frequency trading, payment rails, and real-time applications gravitate here. Firedancer demonstrated 1 million TPS in controlled tests and is now live through the Frankendancer hybrid client on over 20% of staked SOL. Alpenglow, which passed community vote and is targeting Q1 2026 mainnet activation, aims to reduce finality from ~13 seconds to 100–150 milliseconds. The Anchor framework cuts Rust development time by 40-60%. The security tradeoff is real: Rust prevents memory safety bugs at compile time, but Solana introduces unique attack vectors around missing account validation and signer checks. The $223 million Cetus hack (May 2025) came from a missed overflow check. The auditor pool is smaller than Ethereum's, and the ecosystem of battle-tested contract libraries is less mature. But the teams choosing Solana in 2026 are choosing it because the architecture enables things no other chain can do, not because it is cheap.

Sui is the greenfield bet for teams that want compile-time safety guarantees Solidity cannot offer. 219% developer growth, the fastest in the industry. Over 200 active dApps. DeFi TVL peaked at approximately $2.6 billion in late 2025, though it has since pulled back significantly. Move's object-ownership model eliminates reentrancy by design: resources cannot be copied or implicitly discarded, which prevents an entire category of vulnerabilities that have cost the Solidity ecosystem billions. The Move VM 2.0 upgrade reduced gas by 40%. The 2026 roadmap includes a native Ethereum bridge and USDsui. The tradeoff is ecosystem maturity: Move developers are harder to hire, the auditor pool is the smallest of any chain on this list, and the DeFi ecosystem is still early compared to Ethereum or Solana. For teams willing to invest in a newer ecosystem with structurally stronger safety properties, Sui is the most interesting bet in 2026.

How Does Security Infrastructure Differ by Chain?

This is the section most "best blockchain" articles skip, and from our perspective as an auditing firm, it is the one that matters most.

Ethereum has the deepest bench of experienced smart contract auditors, the most mature static analysis tools (Slither, Mythril, Echidna), the largest corpus of formally verified contracts, and the most active bug bounty ecosystem. Auditors can reference thousands of previously reviewed contracts and known vulnerability patterns — institutional knowledge that does not exist at the same depth on any other chain. EVM-compatible L2s (Base, Arbitrum, Optimism) inherit most of this tooling, though L2-specific issues around sequencer trust assumptions and cross-chain message verification require additional review.

Solana's security tooling is growing but remains a generation behind Ethereum. The auditor pool is smaller, open-source analysis tools are fewer, and the ecosystem of battle-tested contract templates is less extensive. Rust's compile-time guarantees eliminate memory bugs, but the most common Solana vulnerability class, missing account validation checks, is not something the compiler catches. With Firedancer introducing a second validator client, the attack surface for consensus-level bugs has also expanded, though client diversity is a net positive for network resilience long-term.

Sui's Move language offers the strongest compile-time safety guarantees of any chain on this list. Reentrancy is structurally impossible, and resources cannot be copied or implicitly discarded. However, the Move auditor pool is the smallest, and the security tooling ecosystem is still nascent. Teams choosing Sui for its safety properties should factor in that finding qualified reviewers will take longer and cost more.

One additional factor: multi-chain deployment is increasingly common (one in three developers now works across multiple chains), but it introduces cross-chain security risks that most teams underestimate. Bridge trust assumptions, message verification, and state synchronization across chains each add attack surface. If your architecture spans multiple networks, the audit scope increases accordingly.

Across every chain, the fundamentals do not change: a thorough audit process before deployment is not optional for any protocol handling user funds. The language and VM affect which vulnerability classes you face, but they do not eliminate the need for human review of your business logic.

How to Choose the Right Chain for Your Project

1. Start with your use case, not the technology. If you are building a lending protocol that needs to compose with existing DeFi liquidity, you need Ethereum mainnet or Arbitrum where that liquidity already exists. If you are building a consumer payments app where sub-second finality and sub-cent fees are requirements, Solana or Base are the obvious choices. If you are building something where safety guarantees matter more than ecosystem size, Sui's Move language is worth the tradeoff. Define what your application needs to do before evaluating chains.

2. Follow the liquidity. The best technology does not help if your users cannot access the assets they need. Check where the stablecoin volume, DEX depth, and lending market TVL actually live. Use DefiLlama to compare. For DeFi, Ethereum and Arbitrum have the deepest pools. For consumer stablecoin activity, Base processed $55 billion in weekly stablecoin volume in late 2024. Liquidity begets liquidity, and migrating later is expensive.

3. Match the language to your team. If your team writes Solidity, the EVM ecosystem (Ethereum, Base, Arbitrum) is the path of least resistance. If your team has Rust experience, Solana and Arbitrum Stylus are both options. If you are starting from scratch and want the strongest built-in protections, Move (Sui) eliminates entire vulnerability classes at the language level but requires learning a new paradigm. Factor in hiring: Solidity developers are the most available, Rust developers are growing fast, and Move developers are still scarce.

4. Map the security infrastructure before you write code. Verify that qualified auditors exist for your target chain, that static analysis tools are production-ready, and that bug bounty platforms support your ecosystem. Ethereum has the widest coverage. Solana is well-served but more concentrated among fewer firms. Sui may require specialized engagements. Audit pricing varies significantly by chain and complexity, and factoring this into your budget early prevents surprises at launch.

5. Deploy to testnet and benchmark real costs. Gas estimates and TPS numbers on marketing pages do not tell you what your specific contract operations will cost under real conditions. Deploy your contracts to each candidate chain's testnet, run your most expensive operations, and validate that finality times meet your UX requirements. A DeFi swap on Arbitrum costs $0.03, but a complex multi-step liquidation with oracle calls may cost significantly more. Test with your actual contract logic, not synthetic benchmarks.

The Bottom Line

There is no single best blockchain to build on in 2026. There is a best chain for your specific use case, team, and users. Ethereum mainnet for maximum composability and security depth. Base for consumer distribution. Arbitrum for complex DeFi. Solana for throughput, parallel execution, and sub-second finality. Sui for compile-time safety guarantees. Pick the chain where your users, liquidity, and security needs converge, and budget for a formal audit regardless of which one you choose.

Frequently Asked Questions

What is the best blockchain to build on in 2026?

It depends on your use case. Ethereum mainnet for DeFi composability and the deepest security infrastructure. Base for consumer apps with Coinbase distribution. Arbitrum for complex DeFi at lower fees. Solana for high-throughput payments and trading with Firedancer pushing toward 1M TPS. Sui for safety-first development with Move.

Which blockchain has the most developers in 2026?

Ethereum leads with 31,869 active developers and 16,181 new developers added in the first nine months of 2025. Solana ranks second with 17,708 active developers and 83% year-over-year growth. Sui has the fastest growth rate at 219% year-over-year.

What are the cheapest blockchains for deploying smart contracts?

Solana at $0.00025 per transaction, Base under $0.01, Arbitrum $0.05 to $0.30, and Ethereum mainnet at roughly $3.78 post-Fusaka. Cost should be weighed against security infrastructure and liquidity depth for your use case.

Is Solana or Ethereum better for developers?

Ethereum has the larger ecosystem, deeper liquidity, and more mature security tooling. Solana has dramatically higher throughput (65K TPS, Firedancer targeting 1M), near-zero fees, and Alpenglow targeting 100–150ms finality (pending mainnet activation). Teams building DeFi choose Ethereum or L2s. Teams building payments, trading, or real-time apps choose Solana.

Which Layer 2 is best for developers in 2026?

Base leads for consumer apps with 46% of L2 DeFi TVL and 62% of L2 fee revenue, with Coinbase's user base as a distribution advantage. Arbitrum leads for complex DeFi with $17 billion TVL and Stylus for Rust/C++ contracts. Both use standard Solidity tooling with minimal changes from Ethereum mainnet.

How do security risks differ between blockchains?

Ethereum has the most mature auditor pool and tooling. Solana's Rust prevents memory bugs but has unique account validation attack vectors. Sui's Move eliminates reentrancy by design but has the smallest auditor pool. Over $3.4 billion was stolen across crypto in 2025 regardless of chain. A formal audit is essential on every network.