Developer activity is a key indicator of a blockchain’s long-term value. Polkadot’s Substrate framework allows developers to build custom blockchains that integrate with its Relay Chain, benefiting from shared security and interoperability. However, as of February 2025, Polkadot’s active developer count has not been explicitly quantified in recent data, suggesting potential stagnation. Cosmos’ Cosmos SDK, built on Go with over 50 modules (e.g., auth, bank), is beginner-friendly and enables rapid blockchain deployment with Tendermint consensus. Despite a drop from 97 developers in May 2023 to 28 in February 2025, Cosmos maintains a vibrant ecosystem with projects like KAVA and Secret Network.