Introduction
The decentralized finance (DeFi) ecosystem has undergone rapid evolution in just six months, with innovation reaching unprecedented levels. Alongside the growth of DeFi and NFT markets, blockchain protocol development has played a pivotal role in driving adoption.
Outlier Ventures, a European blockchain venture capital firm, recently released its 2021 Blockchain Development Trends Report, analyzing core developments across blockchain protocols, DeFi, and NFTs over the past year.
Key Findings
1. Blockchain Protocols
(1) Ethereum remains the most actively developed blockchain, followed by Cardano and Bitcoin.
(2) Multi-chain protocols (Polkadot, Cosmos, Avalanche) continue to see rising developer activity.
(3) Filecoin, a decentralized storage project, entered the top five most actively developed protocols within a year of its mainnet launch.
(4) Ethereum "Killers" (Tron, EOS, Komodo, Qtum) experienced declining development metrics.
Top 5 Most Active Protocols
| Protocol | Avg. Weekly Commits | Monthly Active Devs |
|----------------|---------------------|---------------------|
| Ethereum | 866 | 220 |
| Cardano | 761 | 144 |
| Bitcoin | 441 | 103 |
| Filecoin | 405 | 92 |
| Polkadot | 385 | ~100 |
Emerging Projects
- Avalanche: 4x growth in commits ahead of mainnet launch.
- Terra: 5x surge in developer activity.
- Ocean Protocol: Sustained rise due to datatoken adoption.
Declining Projects
- EOS, Tron, XRP: >50% drop in commits.
- Hyperledger & Corda: Reduced enterprise blockchain activity.
2. DeFi Protocols
(1) MakerDAO leads in developer activity, though contributions are declining.
(2) Aave (763%) and Bancor (264%) saw the highest growth.
(3) Newer protocols (Yearn Finance, SushiSwap) rapidly scaled development.
Top 5 DeFi Projects by Activity
| Protocol | Avg. Weekly Commits | Monthly Active Devs |
|----------------|---------------------|---------------------|
| Gnosis | 276 | ~50 |
| MakerDAO | 220 | ~60 |
| Synthetix | +58% growth | ~40 |
FAQs
Q: Why did Filecoin’s development surge?
A: Preparation for its October 2020 mainnet launch drove a 175% increase in commits.
Q: Which "Ethereum killers" are struggling?
A: Tron, EOS, and Qtum saw significant drops in commits (>50%).
3. NFT & Virtual Worlds
- Most NFT projects (OpenSea, Axie Infinity) operate as closed-source.
- Decentraland is an exception, with commits rivaling major blockchains like ZCash.
GitHub Stats
| Metric | Uniswap (DeFi) | Decentraland (NFT) |
|----------------|----------------|--------------------|
| Stars | 3,200 | 1,100 |
| Forks | 980 | 420 |
Conclusion
- Ethereum and Cardano dominate developer activity.
- Filecoin’s rise highlights demand for decentralized storage.
- DeFi & NFTs continue evolving, but many NFT projects lack open-source transparency.
👉 Explore more blockchain trends
Data and methodologies are open-source via Outlier Ventures’ GitHub.
Formatting Notes:
- Headings (
#,##) structure content hierarchically. - Tables compare key metrics for readability.