Merlin Chain vs B² Network: Best Bitcoin L2 in 2026
Merlin Chain launched February 2024 as ZK-Rollup Bitcoin L2 reaching peak $3.5B TVL with subsequent decline to $1.7B. B² Network launched as modular Bitcoin L2 with B² Rollup (verification commitment-based) plus B² Hub data availability. Both target Bitcoin L2 category but with substantially different architectural choices: Merlin focuses on EVM-compatible ZK-Rollup with Polygon CDK; B² focuses on Bitcoin-native architecture with verification commitments. The Bitcoin L2 race in 2026 has structurally evolved with BSquared currently ranking above Merlin in DeFi TVL screens.
Quick verdict by use case
Why Merlin Chain wins (5 reasons)
Largest Bitcoin L2 ecosystem with 200+ dApps and $1.7B TVL
Merlin Chain has 200+ dApps across DeFi, BTCFi, gaming, NFTs since February 2024 launch. Current TVL approximately $1.7B (down from $3.5B peak but still substantial). Notable ecosystem participants: UniCross, Solv Protocol, Avalon Labs, MerlinSwap. Over $16 billion in BTC bridged volume. The category dominance compounds: more dApps attract more users, more users attract more developers. B² Network operates with smaller ecosystem despite recent TVL growth. For pure category leadership in Bitcoin L2 ecosystem breadth, Merlin Chain has structural advantages.
EVM compatibility provides developer migration path
Merlin Chain is EVM-compatible sidechain built with Polygon CDK. The architecture means existing EVM developers can deploy applications without rewriting smart contracts. The migration path attracts substantial dApp ecosystem with proven Ethereum DeFi primitives ported to Bitcoin context. B² Network targets more Bitcoin-native architecture which provides different positioning but with smaller existing developer base. For projects wanting broad EVM developer migration to Bitcoin L2, Merlin Chain is structurally cleaner.
Stella wallet plus zk-proof infrastructure improvements
Merlin Chain released Stella wallet (February 2026) enabling biometric login plus simplified onboarding for non-crypto-native users. November 2025 zk-proof infrastructure update improved batch processing performance. Fork 12 upgrade plans for sequencer improvements. The continued infrastructure investment signals active development despite TVL decline. For users valuing protocols with sustained development momentum, Merlin Chain has documented investment patterns. B² Network has its own development roadmap but Merlin's consumer-facing infrastructure (Stella wallet) is more visible.
Bitmap Tech backing with strong Web3 institutional ties
Merlin Chain is product line of Bitmap Tech (formerly RCSV) founded by Jeff Yin who previously raised funding from Sequoia Capital, IDG Capital, BAI Capital, 5Y Capital and Vitalbridge across multiple Web2 ventures before pivoting to Web3 in 2023. The institutional credentials provide credibility plus connections that pure Web3 protocols may lack. BRC-420 "Blue Box" collection under Bitmap Tech became one of hottest Ordinals assets. For investors valuing institutional pedigree plus established Web3 ecosystem positioning, Merlin Chain has structural advantages.
Sublime liquidity history despite TVL volatility
Despite TVL decline from $3.5B peak to current $1.7B, Merlin Chain has demonstrated ability to attract substantial Bitcoin liquidity. The $16 billion+ in BTC bridged volume signals real economic activity beyond just TVL metrics. Strategic partnership with B² Network demonstrates inter-L2 cooperation. The category-leading dApp ecosystem (UniCross, Solv Protocol, Avalon Labs) continues operating with substantial liquidity. For users wanting Bitcoin L2 with proven liquidity attraction plus deep ecosystem partnerships, Merlin Chain is structurally cleaner.
Why B² Network wins (5 reasons)
Currently ranks above Merlin in Bitcoin L2 DeFi TVL screens
BSquared now ranks above Merlin in late-March 2026 DeFi TVL screens according to Bitcoin L2 ranking analyses. The relative TVL position reflects continued B² Network growth vs Merlin's post-peak decline. Bitcoin L2 TVL scoreboards show BSquared in top tier among BTC L2 networks. For users wanting Bitcoin L2 with current momentum vs declining trajectory, B² Network is structurally cleaner. The relative TVL leadership is recent and may continue evolving.
Bitcoin-native architecture with verification commitments
B² Network introduces B² Rollup, the first Bitcoin rollup based on verification commitment, plus B² Hub, the first Bitcoin Data Availability layer that achieves finality on the Bitcoin network. The architectural philosophy emphasizes Bitcoin-native positioning rather than EVM-compatibility-first approach. The B² Hub uses PoS chain ensuring security via Validators staking BTC and B² native token. For projects valuing Bitcoin-native architectural alignment, B² Network is structurally cleaner. The verification commitment approach is distinct from Merlin's ZK-Rollup architecture.
Modular L2 design with separable rollup plus DA layer
B² Network's modular design separates B² Rollup (execution layer) from B² Hub (data availability layer). The modular architecture provides flexibility: rollups can use B² Rollup with alternative DA. B² Hub can also serve other rollups beyond just B²'s own. Merlin Chain operates more monolithically with integrated execution plus DA. For projects valuing modular architecture flexibility, B² Network is structurally cleaner. The modular approach aligns with broader 2026 modular blockchain trends.
Strategic partnership with Merlin demonstrates ecosystem cooperation
B² Network and Merlin Chain entered strategic partnership covering shared liquidity (mBTC and solvBTC bridging), security infrastructure cooperation. The partnership demonstrates B² Network as serious infrastructure player capable of coordinating with category leaders. The partnership specifically positions B² Hub as DA option that other Bitcoin L2s could leverage. For investors valuing ecosystem cooperation positioning, B² Network has structural advantages despite smaller absolute scale than Merlin.
Avoided extreme TVL volatility cycle
Merlin Chain's trajectory: $3.5B peak (early 2024) → $681M low → recovery to $1.7B (current). MERL token down 97.5% from all-time high. The extreme volatility reflects speculative nature of Bitcoin L2 narrative early adoption plus subsequent retreat. B² Network has experienced more measured growth without comparable peak-to-trough volatility. For investors valuing more stable TVL trajectory vs hype-cycle volatility, B² Network is structurally cleaner. Whether B²'s growth pattern continues sustainably depends on continued execution.
Side-by-side comparison
| Dimension | Merlin Chain | B² Network |
|---|---|---|
| Architecture | ZK-Rollup BTC L2 (Polygon CDK) | Verification commitment rollup + B² Hub DA |
| Native token | MERL (2.1B max supply) | B² (native B² Network token) |
| Mainnet launch | February 2024 | 2024 (modular L2) |
| EVM compatibility | Yes (full EVM via Polygon CDK) | Bitcoin-native focus |
| Current TVL (relative) | $1.7B (down from $3.5B peak) | Top tier; ranks above Merlin currently |
| dApp ecosystem | 200+ dApps (broadest BTC L2) | Smaller but growing ecosystem |
| Notable ecosystem partners | UniCross, Solv Protocol, Avalon Labs | Strategic partnership with Merlin Chain |
| BTC bridged volume | $16B+ cumulative | Smaller cumulative volume |
| Architecture maturity | Operational since Feb 2024 | Operational with modular design |
| DA layer approach | Uses Celestia for DA | B² Hub native BTC-finality DA |
| Token price (recent) | MERL $0.0365 (down 97.5% from ATH) | Active operations |
| Founder/team | Bitmap Tech / Jeff Yin (Sequoia-backed) | B² Network team |
Scorecard
Weighted scores out of 10 across the categories that matter for production deployments.
| Category | Merlin Chain | B² Network | Note |
|---|---|---|---|
| Category dominance / TVL | 8.0 | 8.5 | BSquared currently ranks above Merlin in late-March 2026 DeFi TVL screens |
| dApp ecosystem breadth | 9.5 | 7.0 | Merlin's 200+ dApps is structurally larger |
| EVM developer migration path | 9.5 | 6.5 | Merlin's Polygon CDK provides clean EVM path |
| Bitcoin-native architecture | 6.5 | 9.0 | B² Network's verification commitment is more Bitcoin-aligned |
| Modular architecture | 6.0 | 9.0 | B² Network's separable rollup + DA is structurally cleaner |
| Recent growth trajectory | 6.5 | 8.5 | B² Network growing while Merlin declining |
| BTC liquidity attraction | 9.0 | 7.5 | Merlin's $16B+ bridged volume demonstrates capability |
| Institutional backing | 9.0 | 7.5 | Bitmap Tech / Sequoia backing is structurally distinctive |
| Long-term sustainability | 7.0 | 8.0 | Relative trajectories suggest different sustainability profiles |
| Weighted total | 8.0 | 7.9 | Edge: Merlin Chain |
How they actually work
Merlin Chain and B² Network target Bitcoin L2 with substantially different architectural approaches.
Merlin Chain mechanics: ZK-Rollup Bitcoin L2 built using Polygon CDK with EVM compatibility. The chain processes transactions off-chain, generates ZK-proofs, posts proofs to Bitcoin L1 for verification. ZK-Rollups bundle multiple transactions into single batches reducing load on Bitcoin base layer enabling faster cheaper transactions. EVM compatibility means existing Ethereum smart contracts deploy with minimal modification.
Merlin uses Cobo for institutional asset custody (centralized BTC bridge with multi-party computation threshold signature scheme). Asset withdrawals must be approved by Cobo before processing. Merlin Chain itself uses centralized sequencer for block packaging. Both centralization aspects are structurally significant though decentralization roadmap exists.
Data availability via Celestia for transaction data. The architecture is positioned as "Bitcoin layer" while operationally functioning as EVM sidechain in Ethereum ecosystem with Bitcoin-related branding. Plans to evolve into full Bitcoin rollup with zk-proofs posted to Bitcoin L1 for verification but currently operates more as Bitcoin-adjacent sidechain.
MERL token (2.1B max supply launched April 2024): governance over Merlin DAO, staking and delegation to collators, gas payments in certain wallet contexts (native gas is "Merlin_BTC" BTC-like representation), collateral and liquidity in Merlin DeFi ecosystem.
B² Network mechanics: modular Bitcoin L2 with two distinct components: B² Rollup (execution layer based on verification commitments) plus B² Hub (data availability layer with finality on Bitcoin network). The modular architecture separates execution from DA enabling flexibility.
B² Rollup uses verification commitment approach (distinct from ZK-Rollup or Optimistic Rollup architectures). B² Hub is positioned as "the first Bitcoin Data Availability layer that achieves finality on the Bitcoin network" using PoS chain with Validators staking BTC and B² native token. Validators secure DA layer plus validate state transitions through B² Hub.
B² Network strategic partnership with Merlin Chain enables shared liquidity for Bitcoin staking products including mBTC (BTC for Merlin staking program) plus solvBTC (Solv Protocol's yield-bearing Bitcoin). The cross-Bitcoin-L2 cooperation positions both protocols as ecosystem participants rather than pure competitors.
The architectural philosophies differ in three key dimensions. First, EVM compatibility: Merlin is EVM-first with Polygon CDK; B² Network is Bitcoin-native focus with verification commitments. Second, modular architecture: Merlin operates more monolithically; B² Network separates Rollup from Hub. Third, Bitcoin-alignment philosophy: Merlin functions as Bitcoin-adjacent EVM sidechain; B² Network targets deeper Bitcoin-native integration via DA finality on Bitcoin.
For builders wanting EVM-compatible Bitcoin L2 with broad existing dApp ecosystem: Merlin Chain is structurally cleaner. The 200+ dApps plus EVM compatibility plus Polygon CDK foundation provide structural advantages for developer migration from Ethereum DeFi to Bitcoin L2 context.
For builders wanting Bitcoin-native architecture with verification commitments plus DA finality on Bitcoin: B² Network is structurally cleaner. The modular design provides flexibility plus the Bitcoin-native positioning aligns with Bitcoin maximalist preferences.
For projects valuing modular blockchain architecture: B² Network's separable Rollup plus Hub approach is structurally cleaner. Other Bitcoin L2 projects could potentially leverage B² Hub as DA option independently of B² Rollup.
For projects wanting current TVL momentum: B² Network currently ranks above Merlin in DeFi TVL screens (late-March 2026 data). The relative TVL leadership reflects different growth trajectories. Whether the relative position continues depends on continued execution.
For projects wanting largest Bitcoin L2 ecosystem with 200+ dApps: Merlin Chain has structural advantages despite TVL decline from $3.5B peak. The ecosystem breadth compounds: more dApps attract more developers and users.
The honest assessment: Merlin Chain leads on ecosystem breadth and EVM developer migration path. B² Network leads on Bitcoin-native architecture and current relative TVL momentum. Different positioning serving different builder priorities within Bitcoin L2 category.
Tokenomics compared
MERL and B² have substantially different tokenomics designs and operational contexts.
MERL tokenomics: 2.1B total supply launched April 2024 with structured distribution: 20% airdropped to Merlin's Seal event participants ($3.6B TVL event with 91% from Bitcoin community), Merlin Eco allocation, early supporters, initial core contributors, 1% public sale via People's Launchpad, 15.23% to private investors with two distinct release schedules, 3% to strategic advisors with vesting aligned to platform growth.
MERL utility: governance over Merlin DAO ecosystem decisions, staking and delegation to collators (network nodes), gas payments in certain wallet contexts (Merlin_BTC is primary gas token but MERL has roles), collateral and liquidity for Merlin DeFi protocols, native liquidity provision in ecosystem applications.
MERL price action: launched April 2024 with significant initial activity. Currently trading at $0.0365 (recent), down 97.5% from all-time high of $1.45. The price decline reflects multiple factors: TVL decline from $3.5B peak to $1.7B, broader Bitcoin L2 narrative cooling, token supply expansion as vesting progresses, broader market conditions affecting BTC L2 category.
The dramatic price decline doesn't necessarily mean fundamental protocol failure - many tokens experience 90%+ drawdowns during bear cycles while underlying protocols continue operating. But the decline does signal either market overvaluation at peak or current undervaluation relative to potential. For investors evaluating MERL: weigh ecosystem breadth advantages vs TVL decline trajectory.
B² Network tokenomics: B² is native B² Network token with utility for governance, validator staking (B² Hub validators stake BTC plus B² for security), payment for B² Network services. The tokenomics design is structurally similar to other L2 tokens with native chain utility plus governance.
B² value capture: as B² Network ecosystem grows (TVL expansion, dApp deployment, B² Hub adoption by other rollups), B² captures value via staking rewards plus governance utility plus service fees. The relatively recent operational status means B² value capture is earlier in trajectory than MERL.
The tokenomics philosophies are similar (governance + staking + utility) but operational contexts differ. MERL operates with proven 2-year history including peak hype cycle plus subsequent decline. B² operates with shorter operational history but with current TVL growth momentum.
For investors: MERL provides exposure to established Bitcoin L2 ecosystem with current undervaluation (97.5% drawdown from ATH) plus 200+ dApp positioning. B² provides exposure to growing Bitcoin L2 with current TVL momentum plus modular architecture positioning. Different exposure profiles for different theses.
For users: MERL governance participation lets you influence Merlin DAO direction. B² governance participation provides validator-level stake in B² Network operations. Different participation contexts.
For builders: ignore the token comparison and pick on architecture fit. EVM-compatible Bitcoin L2 with broad dApp ecosystem goes Merlin. Bitcoin-native modular architecture goes B² Network. The token economics affect token price; they don't determine integration success.
The honest comparison: MERL captures established Bitcoin L2 ecosystem position despite price decline. B² captures growing Bitcoin L2 with current relative momentum. Different value capture trajectories for different operational contexts.
Security model
Both protocols have meaningful security considerations specific to their architectures.
Merlin Chain security model: smart contract security covering EVM-compatible chain plus Polygon CDK infrastructure. ZK-Rollup architecture with proofs eventually posted to Bitcoin L1 (current state: chain processes transactions, ZK-proofs posted to Bitcoin via Celestia DA layer). Cobo institutional partner provides BTC bridge custody using multi-party computation threshold signature scheme.
Known concerns for Merlin: centralized sequencer (currently single sequencer with decentralization roadmap), centralized bridge approval (Cobo approves all withdrawals before processing), Celestia DA dependency (DA layer external to Bitcoin), MERL token price volatility doesn't directly affect protocol security but reflects market sentiment, smart contract risks at the application layer for 200+ dApps.
The Cobo bridge centralization is structurally significant: all asset withdrawals must be approved by Cobo before processing. This provides institutional-grade custody but creates centralization vector that pure-decentralization advocates may avoid. Bridge custody balance secured with Cobo's multi-party computation tech.
Merlin has been audited by ScaleBit with audit findings publicly available. Merlin Security Council includes Slowmist and BlockSec for ongoing security infrastructure. The audit transparency exceeds many BTC L2 projects but doesn't eliminate fundamental architectural centralization concerns.
B² Network security model: B² Hub uses PoS chain ensuring security via Validators staking BTC and B² native token. Validators guarantee Data Availability of Rollups plus validate state transitions. The verification commitment approach for B² Rollup is distinct architectural choice with different attack surface than ZK-Rollup or Optimistic Rollup.
Known concerns for B² Network: smaller validator set than mature L1s creates economic security threshold considerations, verification commitment approach has different security assumptions than more battle-tested ZK or optimistic rollup architectures, smart contract risks at the application layer, dependency on B² Hub DA layer for rollup operations.
Bridge security between B² Network and Bitcoin (plus other chains via partnerships) creates additional attack surface. Cross-chain operations require trust assumptions that vary based on bridge architecture.
Both protocols have audit programs and bug bounty programs. Neither has experienced catastrophic protocol-level failures.
The honest comparison: Merlin Chain has more battle-tested architecture (Polygon CDK foundation, ZK-Rollup design) but with substantial centralization concerns (Cobo bridge, centralized sequencer). B² Network has more Bitcoin-native architecture but with shorter operational history. Different attack surfaces with different operational complexity profiles.
For risk-averse capital: don't allocate more than you can afford to lose to either Bitcoin L2. The category-wide risks (relatively new architectures, evolving security infrastructure, hot-wallet bridge dependencies) apply broadly. For substantial BTC exposure, consider Bitcoin L1 directly plus diversified L2 strategy rather than concentration in single Bitcoin L2.
For users entering either: standard DeFi security practices apply. Verify integration quality. Don't over-leverage. Both protocols are reasonable for moderate position sizing at appropriate risk tolerance.
Developer and user experience
Developer and user experience differs substantially reflecting EVM-compatible vs Bitcoin-native positioning.
Merlin Chain UX (developer): EVM compatibility means existing Ethereum developers deploy applications with minimal modification. Standard Ethereum tooling (Hardhat, Foundry, Truffle) works. Polygon CDK foundation provides familiar developer experience. 200+ dApps demonstrate established developer ecosystem. Documentation covers EVM-specific integration patterns plus Bitcoin-bridge specifics.
Merlin Chain UX (end user): standard EVM wallets work (MetaMask, Rabby, Coinbase Wallet). Stella wallet (released February 2026) provides biometric login plus simplified onboarding for non-crypto-native users. Bridge from Bitcoin requires Cobo institutional custody approval which adds friction but provides security. Active dApp ecosystem (UniCross, Solv Protocol, Avalon Labs, MerlinSwap) provides rich user experience.
For Merlin investor UX: MERL token tradable on major DEXes and CEXes. Governance participation via Merlin DAO. Active community engagement via Telegram, Discord, X channels.
B² Network UX (developer): Bitcoin-native architecture requires more specialized development knowledge than EVM-first chains. B² Rollup verification commitment approach has unique characteristics requiring developer familiarity. B² Hub DA integration provides additional developer surface. Documentation covers Bitcoin-native development patterns plus modular architecture specifics.
B² Network UX (end user): bridging from Bitcoin to B² Network involves chain-specific procedures. Standard Bitcoin wallets plus B²-compatible wallets work for asset management. Smaller dApp ecosystem than Merlin means fewer end-user touchpoints but with focused use cases.
For wallet integration: Merlin works with broad EVM wallet ecosystem. B² Network has smaller wallet ecosystem currently.
For mobile UX: Merlin's Stella wallet plus broad EVM mobile dApp ecosystem provide mature mobile experience. B² Network mobile UX is functional but at smaller scale.
For DeFi composability: Merlin's 200+ dApps provide broad composability across DeFi, BTCFi, gaming, NFTs. B² Network smaller ecosystem provides narrower composability but with focused Bitcoin-native applications.
The honest assessment: Merlin Chain provides mature EVM-style UX with broader ecosystem touchpoints. B² Network provides Bitcoin-native UX with smaller but focused ecosystem. Pick based on whether you prefer EVM-compatible Bitcoin L2 (Merlin) or Bitcoin-native modular architecture (B² Network).
Who should pick which
EVM developer wanting Bitcoin L2 with familiar tooling
Merlin Chain. Polygon CDK foundation plus EVM compatibility provides clean migration.
User wanting broadest Bitcoin L2 dApp ecosystem (200+ apps)
Merlin Chain. UniCross, Solv Protocol, Avalon Labs, MerlinSwap and many more.
Bitcoin-native developer wanting verification commitment rollup
B² Network. B² Rollup architectural approach plus B² Hub DA layer.
Project valuing modular Bitcoin L2 architecture
B² Network. Separable B² Rollup plus B² Hub provides flexibility.
User wanting current TVL momentum in Bitcoin L2
B² Network. Currently ranks above Merlin in late-March 2026 DeFi TVL screens.
Investor wanting institutional-pedigree Bitcoin L2 exposure
Merlin Chain via MERL. Bitmap Tech / Sequoia-backed founder positioning.
User wanting non-crypto-native onboarding via biometric wallet
Merlin Chain. Stella wallet provides biometric login simplified onboarding.
Final verdict
Merlin Chain and B² Network represent substantially different Bitcoin L2 architectural approaches with different ecosystem trajectories.
If you want the largest Bitcoin L2 ecosystem with 200+ dApps, EVM compatibility for developer migration from Ethereum, established institutional backing via Bitmap Tech and Sequoia connections plus mature consumer-facing infrastructure (Stella wallet for biometric onboarding), Merlin Chain is the right choice. The $1.7B TVL plus $16B+ cumulative bridged volume demonstrate substantial liquidity attraction capability despite decline from $3.5B peak. The category dominance compounds: more dApps attract more developers and users. EVM compatibility means existing Ethereum DeFi primitives deploy with minimal modification. The Polygon CDK foundation provides familiar developer experience.
If you want Bitcoin-native architecture with verification commitment rollup plus B² Hub DA layer providing finality on Bitcoin, modular separable architecture, current TVL growth momentum (BSquared currently ranks above Merlin in late-March 2026 DeFi TVL screens), B² Network is the right choice. The Bitcoin-native positioning aligns with Bitcoin maximalist preferences. The modular architecture provides flexibility for future Bitcoin L2 ecosystem evolution. The strategic partnership with Merlin Chain demonstrates ecosystem cooperation positioning. The verification commitment approach is distinct architectural choice with different security assumptions than ZK or optimistic rollups.
These aren't direct substitutes despite both serving Bitcoin L2 category. Merlin Chain is EVM-compatible Bitcoin L2 with broad dApp ecosystem. B² Network is Bitcoin-native modular Bitcoin L2 with current relative momentum. Different positioning serving different builder priorities.
The market reflects different category dynamics. Merlin Chain captures broader ecosystem breadth with EVM developer migration path. B² Network captures Bitcoin-native architectural alignment with current TVL momentum. Different exposure profiles for different theses.
The honest call: EVM developers wanting Bitcoin L2 with familiar tooling default to Merlin Chain for the structural compatibility. Bitcoin-native projects wanting modular architecture default to B² Network for the verification commitment plus Bitcoin DA finality positioning. Investors wanting established Bitcoin L2 ecosystem exposure default to MERL despite price decline (potential undervaluation given 200+ dApp ecosystem). Investors wanting growing Bitcoin L2 default to B² Network for current momentum.
The TG3 client recommendation: EVM-compatible Bitcoin L2 needs default to Merlin Chain for the structural advantages plus mature ecosystem. Bitcoin-native modular L2 needs default to B² Network for the architectural alignment. For diversified Bitcoin L2 exposure across different architectural philosophies, holding both MERL and B² provides exposure to EVM-compatible and Bitcoin-native models simultaneously. Bitcoin L2 category remains relatively early; concentration in single protocol carries category-wide risks beyond protocol-specific considerations.
FAQ
Is Merlin Chain still operational despite TVL decline?
Should I prefer EVM-compatible (Merlin) or Bitcoin-native (B² Network)?
Why did MERL drop 97.5% from all-time high?
Is BSquared really larger than Merlin in TVL now?
How does Cobo bridge centralization affect Merlin Chain?
Can I use both Merlin Chain and B² Network?
Is Bitcoin L2 a viable category long-term?
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