Developer activity remains a critical metric for assessing the health of blockchain networks, reflecting levels of innovation, long-term sustainability, and community engagement. According to data from Santiment, Ethereum, BNB Chain, and Polygon rank as the top three blockchains by developer activity over the past 30 days. They are followed by Arbitrum, Optimism, Solana, Cosmos, Avalanche, Harmony, and Cardano.

Ethereum Leads 30-Day Developer Activity Rankings

Ethereum tops the list with 263.3K developer activity events over the past thirty days, marking a 40.29% decline. These events involved 1.1K contributors, representing a 13.23% drop. Ethereum's more than 2x lead over the next-ranked network underscores its sustained position as the largest smart contract platform, where core protocol research, layer-2 coordination, and ecosystem tooling continue to attract the broadest base of full-time and part-time developers.

BNB Chain holds the second position, recording 121.8K developer activity events with a 40.72% decrease. The network had 603 contributors during this period, reflecting a 17.62% decline. BNB Chain's placement reflects its ties to the Binance exchange ecosystem and its push to grow on-chain activity through low-fee infrastructure.

Polygon ranks third among blockchain ecosystems for developer activity over the past 30 days, with 100.4K events—a 40.85% decrease. Its 452 contributors show a 16.14% decline. Polygon has positioned itself as an Ethereum scaling platform with multiple product lines, including its proof-of-stake sidechain and zero-knowledge rollup infrastructure.

Arbitrum takes the fourth spot, accounting for 79K events with a 45.22% decline and 373 contributors, an 18.02% drop. Alongside Optimism, Arbitrum is one of the leading optimistic rollups built on Ethereum, and the presence of both in the top five signals that layer-2 scaling networks remain a focal point for builders.

Optimism, Solana, Avalanche, Harmony, and Cardano Round Out the List

According to sanbase data, Optimism recorded 78.4K monthly developer activity events, indicating a 45.3% dip. Its 355 contributors represented an 18.01% drop.

Solana follows with 77.4K developer activity events, showing a 32.14% decline. Notably, Solana's 377 contributors increased by 1.62% over the same period—the only network in the top 10 to see contributor growth. Solana, known for its high-throughput architecture, was the sole chain to expand its active contributor base, a signal that builder interest in its ecosystem persisted even as overall activity events declined.

Santiment ranks Avalanche as the eighth-leading blockchain by 30-day developer activity, with 73.4K events (a 43.93% dip) and 320 contributors, reflecting a 15.34% decrease.

Harmony recorded 62.9K monthly developer activity events, a 39.45% decline, with 287 contributors showing a 10.87% drop.

Cardano concludes the list with 62.6K events and 295 contributors, representing declines of 34.58% and 11.41% respectively. The uniform downward trend in activity events across all ten networks suggests a broader cyclical pullback rather than chain-specific weakness, making Solana's contributor growth a notable outlier to monitor in subsequent reporting periods.