Ease of Use & Simplified Architecture: Many users appreciate HarperDB’s simplicity and efficiency, particularly for developers looking to integrate a database and API solutions into their applications. The fact that it combines both backend services into a single platform—eliminating the need for separate database and API setups—is often highlighted as a major benefit​

Speed & Performance: Users commend HarperDB for its fast data processing and reduced latency, especially in use cases requiring real-time global data replication. The platform's ability to deliver near-instant data updates across multiple locations is highly valued by users, especially in industries like telecom and gaming

Scalability: HarperDB is lauded for its ability to scale from small startups to large enterprises. Its cloud-based architecture allows for easy scaling without the need to manage complex infrastructure​

Deployment and Integration: The CLI utility for automated deployments is another popular feature. Users report that this tool simplifies deployment in production environments, reducing manual intervention​.

Limited Support for Unstructured Data: Some users have noted that HarperDB may not be the best solution for handling large amounts of unstructured data, such as images and videos. While it excels with structured data, it may require additional tools or workarounds for managing unstructured content​.

Documentation Challenges: A number of reviews mention that the documentation for HarperDB can be overwhelming or unclear at times, especially for those less experienced with backend development. Some users feel that more straightforward, easy-to-understand guides would be beneficial​.

Integration Issues: While the platform supports several programming languages and frameworks, some users have faced challenges integrating HarperDB with specific environments, like Flask. These issues can sometimes lead to additional development time.