# chainlink and covalent data system

*difference between chainlink and covalent*

By [DE.FI](https://paragraph.com/@de.fi) · 2025-08-29

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Both Covalent and Chainlink serve as critical data infrastructure providers for AI systems in the blockchain space, but they operate in distinct ways and serve different purposes.

Covalent's Data Provision
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*   **Data Type**: Historical and current on-chain data
    
*   **Coverage**: 200+ supported blockchains
    
*   **Data Structure**:
    
    *   Full archival blockchain data
        
    *   Normalized and aggregated multichain data
        
    *   Account balances, transaction histories, log events, NFT data
        

Chainlink's Data Provision
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*   **Data Type**: Real-time and off-chain data feeds
    
*   **Delivery Method**:
    
    *   Push-based oracles for regular updates
        
    *   Pull-based Data Streams for low-latency market data
        
*   **Data Structure**:
    
    *   Price feeds
        
    *   API data from external sources
        
    *   Cross-chain messages and data
        

Data Consumption Pattern
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### For AI Systems Using Covalent

1.  **Data Access**: AI systems can query historical blockchain data through:
    
    *   Unified REST API
        
    *   No-code analytics tools
        
    *   Enterprise-grade performance APIs
        

### For AI Systems Using Chainlink

1.  **Real-time Data Flow**: AI systems can consume data through:
    
    *   Decentralized Oracle Networks
        
    *   Data Streams for sub-second market data
        
    *   Custom API connections for specific data needs
        

Key Differences
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*   **Covalent**: Focuses on historical and aggregated blockchain data analysis
    
*   **Chainlink**: Specializes in real-time data feeds and external data integration

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*Originally published on [DE.FI](https://paragraph.com/@de.fi/chainlink-and-covalent-data-system)*