Starknet Phase 4 Shinobi Upgrade Launches Native Privacy and Bitcoin Support on Mainnet

Tel Aviv, May 1, 2026 — Starknet has deployed Phase 4 of its protocol roadmap with the Shinobi upgrade, introducing native privacy-preserving transactions and Bitcoin interoperability directly to mainnet. The upgrade increases network throughput to 4,000–6,000 transactions per second — a 2.5x improvement over Phase 3 — while establishing a native Bitcoin bridge that underwent three independent security audits from OpenZeppelin, Trail of Bits, and Certora before deployment.

Starknet's total value locked has grown 3.2x since Phase 3 launched in Q4 2025, reaching $180–220 million, with daily transaction volume of $280–350 million. The Shinobi upgrade addresses two structural gaps in the Layer 2 ecosystem: the absence of native privacy computation on Ethereum's execution layer, and fragmentation across Bitcoin's $8.2 billion Layer 2 ecosystem.

Native Privacy Without External Dependencies

Unlike competing Layer 2 protocols that rely on external privacy solutions, Starknet's ZK proof architecture enables privacy-preserving transactions natively. The Starknet Foundation projects that privacy transactions will represent 15–25% of daily volume at launch, with a target of reaching parity with Ethereum privacy solution averages of 18–22% within six months.

The native implementation distinguishes Starknet from Arbitrum and Optimism, both of which currently depend on third-party integrations for confidential transactions.

Bitcoin Bridge and Institutional Context

The Shinobi upgrade's Bitcoin bridge launches with $12–18 million in daily volume, with the Foundation projecting $50–75 million daily within three months. The bridge targets a Bitcoin Layer 2 ecosystem that has reached $8.2 billion in TVL across fragmented solutions including Stacks, Ordinals, and multiple sidechains.

Institutional Bitcoin adoption provides context for the bridge's addressable market. Approximately 28% of Bitcoin's circulating supply is held by institutional entities, with Goldman Sachs' recent covered call ETF filing and Tether's self-custodial wallet launch reflecting continued infrastructure buildout around Bitcoin.

Privacy protocol TVL across the broader ecosystem stands at $3.4 billion, distributed across eight or more protocols. Starknet's native implementation eliminates the multi-hop bridge exposure that currently fragments this market.

Developer Ecosystem and Security

Starknet's $100 million developer grants program, announced in Q1 2026, is actively funding privacy-focused and Bitcoin infrastructure teams building on Cairo. The Foundation has prioritized institutional-grade tooling alongside protocol development, including transaction monitoring and compliance reporting capabilities.

The Bitcoin bridge's three-tier audit process — exceeding the industry standard of two independent reviews — reflects the Foundation's approach to security. Bridge TVL will ramp gradually, starting at $100 million with 20% monthly increases contingent on security performance benchmarks.

STRK is currently trading at $2.15–2.45, near 52-week highs, with a market capitalization of $4.8–5.4 billion.

About Starknet

Starknet is a Cairo-based Layer 2 scaling solution for Ethereum using recursive zero-knowledge proofs, developed by StarkWare and governed by the Starknet Foundation. Launched on mainnet in November 2021, Starknet processes transactions off-chain and submits ZK validity proofs to Ethereum, enabling high-throughput computation with Ethereum-grade security guarantees. The protocol's Cairo programming language is purpose-built for ZK proof generation, enabling applications including private computation, verifiable AI inference, and cross-chain interoperability. The Starknet Foundation supports ecosystem development through grants, research, and institutional partnerships across DeFi, custody, and infrastructure verticals.

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