UnisonDB is a log-native, real-time database optimized for Edge AI and Edge Computing. It combines a B+Tree storage engine with Write-Ahead Logging (WAL) for streaming replication, allowing for rapid data synchronization across many nodes while ensuring strong consistency and durability. Writes are confirmed by a Raft quorum on the write servers, and read-only edge replicas remain synchronized for low-latency access. This setup supports fan-out replication to over 1,000 edge nodes in mere milliseconds, making it suitable for distributed edge-first architectures where low latency is essential. The architecture supports multiple data models, including key-value storage, wide-column formats, and large objects. UnisonDB's structure allows for reactive applications that instantly respond to local changes. It also provides namespace isolation for multi-tenancy, which is vital for applications needing data separation. The system can handle extreme workloads, demonstrated by its ability to manage 60,000 to 80,000 operations per second with minimal latency across thousands of nodes without relying on external message brokers like Kafka or Pub/Sub. In terms of performance, UnisonDB is designed to eliminate the friction between traditional databases and streaming systems. It integrates storage and streaming into a single engine, where every write becomes part of a durable, queryable stream. The underlying architecture consists of a Write-Ahead Log File System (WALFS) that facilitates both writing and reading efficiently, along with a hybrid storage engine. This unified approach enhances system responsiveness and simplifies maintenance by removing the need for separate components to handle state and stream management. For developers, UnisonDB offers a straightforward setup process, including command-line commands for cloning the repository and running the server. It supports a pluggable storage backend, allowing for choices between BoltDB and LMDB. Benchmark tests reveal its competitive edge in terms of throughput and latency compared to other databases, showing that UnisonDB is particularly effective for applications requiring high-speed data access and real-time updates across distributed systems.