The Architecture
March 7, 2022 was a day that underscored just how far blockchain infrastructure had evolved—and how far it still needed to go. Two major announcements from opposite ends of the ecosystem converged on a single theme: the race to scale blockchain networks without sacrificing the core principles of decentralization and privacy. Espresso Systems, a startup born from Stanford University’s applied cryptography research group, emerged from stealth mode with a $32 million funding round and an ambitious plan to build a privacy-focused layer-one blockchain powered by zero-knowledge proofs. Meanwhile, Immutable X, the NFT-focused Layer 2 scaling solution built on Ethereum, announced a $200 million Series C raise that valued the company at $2.5 billion—a sixfold increase from its previous valuation of $410 million.
Together, these two developments painted a vivid picture of where blockchain infrastructure was heading. With Bitcoin trading around $38,062 and Ethereum at $2,498 according to CoinMarketCap data, the broader market was in a state of uncertainty driven by geopolitical tensions. But beneath the surface price action, a technological transformation was accelerating. The question was no longer whether blockchain could scale, but how to scale it responsibly.
Consensus Mechanisms
Espresso Systems’ approach centered on a cryptographic innovation known as ZK-Rollups. The technology works by consolidating multiple transactions into a single, easily verifiable proof using zero-knowledge cryptography—a mathematical method that allows one party to prove a statement is true without revealing the underlying evidence. By processing transactions off-chain and submitting only the compressed proof to the consensus protocol, ZK-Rollups dramatically reduce the bandwidth and computational load on the main network.
The concept was not entirely new. ZK-Rollup technology had already gained traction on Ethereum through scaling solution providers like StarkWare and zkSync. What distinguished Espresso’s approach was its insistence that scalability should not come at the cost of decentralization. The company’s CEO, Ben Fisch, argued that many existing ZK-Rollup implementations created a hidden centralization risk: users became dependent on the rollup server for access to critical data needed to construct future transactions. Espresso aimed to integrate the rollup more carefully with the consensus protocol, maintaining higher throughput and lower fees without concentrating control.
Immutable X, for its part, had already proven the viability of Layer 2 scaling for a specific use case. Built on StarkWare’s ZK-Rollup technology and operating on top of Ethereum, Immutable X enabled gas-free NFT minting and trading while inheriting Ethereum’s security guarantees. The platform had positioned itself as the go-to infrastructure for gaming and digital collectibles, sectors where high transaction volumes and low costs were essential for mainstream adoption.
Network Health
The timing of both announcements was telling. Ethereum, the largest smart contract platform, was in the midst of its monumental transition from proof-of-work to proof-of-stake—a migration commonly known as the Merge. The Beacon Chain had been running alongside the main network since December 2020, and developers were preparing testnets that would simulate the full transition. The Merge promised to reduce Ethereum’s energy consumption by approximately 99 percent, but it would not directly solve the network’s scalability challenges. That task fell to Layer 2 solutions like Immutable X and next-generation layer-one chains like Espresso.
Meanwhile, competing layer-one blockchains faced their own growing pains. Solana, which had positioned itself as a high-throughput alternative to Ethereum, was trading at $82.13 on March 7, down nearly 17.5 percent over the previous seven days. The network had experienced a significant outage in January and would suffer additional disruptions in the months ahead, highlighting the fundamental tension between speed and reliability that Espresso’s team was trying to address.
Against this backdrop, the $200 million invested in Immutable X reflected strong institutional conviction in Layer 2 scaling as the most viable path forward for Ethereum. Rather than competing with Ethereum, Immutable X sought to complement it—handling the high-volume, low-value transactions that would be impractical on the base layer while leveraging Ethereum’s robust security and decentralization.
Developer Ecosystem
Espresso Systems brought formidable academic credentials to the table. CEO Ben Fisch, chief scientist Benedikt Bünz, and chief operating officer Charles Lu were collaborators at Stanford who had each contributed to other high-profile web3 projects, including the privacy-focused Monero blockchain and Chia, the proof-of-space cryptocurrency founded by BitTorrent creator Bram Cohen. Chief strategy officer Jill Gunter, the fourth co-founder, brought venture capital experience from Slow Ventures.
The team’s original mandate was to build a privacy solution for blockchain. But after a year of development, they recognized that scalability had become the more urgent pain point for users. The pivot to address both privacy and throughput simultaneously was a bold strategic decision that reflected the evolving demands of the market. Zero-knowledge proofs were the unifying technology—capable of enabling both confidential transactions and off-chain computation without compromising verifiability.
Immutable X’s developer ecosystem, by contrast, was already thriving. The platform had attracted dozens of game developers and NFT marketplace operators who needed Ethereum-grade security without Ethereum-grade gas fees. The $2.5 billion valuation—up from $410 million—signaled that investors believed the NFT economy would continue to grow and that infrastructure purpose-built for digital collectibles and gaming assets would capture significant value.
Final Assessment
The events of March 7, 2022 offered a clear snapshot of blockchain infrastructure at an inflection point. The first generation of layer-one chains had demonstrated that decentralized networks could work, but their limitations in throughput, cost, and energy consumption had become painfully apparent. The second generation—projects like Espresso Systems—sought to address these shortcomings while preserving the decentralization and privacy that made blockchain valuable in the first place.
Immutable X’s massive funding round validated the thesis that Layer 2 scaling on Ethereum was not just a temporary fix but a long-term architectural choice. Rather than abandoning Ethereum for a faster but less decentralized alternative, major projects and institutions were choosing to build on top of Ethereum, using rollup technology to achieve the performance they needed without compromising on security.
The road ahead was long and uncertain. Zero-knowledge proof technology was still maturing, and the Ethereum Merge—the biggest architectural change in the network’s history—was months away from completion. But the direction of travel was clear. The blockchain industry was moving toward a modular future where specialized layers handled different tasks: a secure base layer for consensus and data availability, rollup protocols for execution and scaling, and privacy-preserving tools for confidentiality. March 7, 2022 was not the day this future arrived, but it was the day its outlines came into sharper focus.
Disclaimer: This article is for informational purposes only and does not constitute financial or investment advice. Readers should conduct their own research before making any investment decisions.
espresso coming out of stanford crypto research with $32m while immutable hit $2.5b valuation. academia to unicorn in record time
espresso came from stanford applied crypto. $32M was reasonable for that pedigree. immutable at $2.5B was the real head scratcher
immutable x going from $410m to $2.5b in one round shows how hot the nft infra play was in early 2022. timing is everything
immutable going from $410M to $2.5B in one round shows how overinflated NFT infra valuations were in early 2022. most of that value evaporated within 12 months
zk_builder is right. $2.5B valuation for an NFT L2 in 2022 was peak bubble. most of those raises look absurd in hindsight
both projects were right about the tech direction. zk rollups won. just the valuations that were disconnected from reality