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IT Product Company

HarperDB

A single runtime for apps and AI agents that joins database, cache, logic and messaging

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  • Founded 2017
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About HarperDB

HarperDB, which now trades as Harper, offers a runtime where the database, cache, application code and messaging all live together. Data and code share one process instead of being split across separate products.

What Harper offers

  • Unified data and application layer — according to Harper, merging these layers cuts latency and cost versus wiring up a separate database, cache and app server.
  • Fast data retrieval — around a millisecond in typical use, according to the company.
  • AI agent support — agent memory, embeddings and tool interfaces share the runtime, letting an agent retrieve context without a separate vector database.
  • Streaming protocols — MQTT, WebSocket and server-sent events are built in next to the data, so applications can react to record changes without a separate message queue.
  • Geo-distributed replication — keeps state close to users across regions.

Key facts

Profile written by TrustList from the business's own published information, Sep 2026.

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