Store the why of your data, stream the rest

EventStoreDB is an open-source state-transition database, designed for businesses that are ready to harness the true power of event-driven architecture.

Features and benefitsDownload EventStoreDB
hero-home

Who's using Event Store?

EventStoreDB has quite a few benefits... because it's designed to have an immutable series of events in streams. It makes natural sense, the way it's designed... it has lots of performance benefits.
Mohamed Khalil, Head of Architecture at HiPages
skuvault-logo logo-kallidus PWC CERN Xero Arnold Clark logo-wiser logo-walmart logo-checkout UK Hydrographic Office
Find out why our customers love EventStoreDB

What is a State-Transition Database?

State-Transition Databases store not just your data, but the different transitions your data goes through over time. State transitions are events that record not just what’s changed, but why it changed in the order those changes occurred. This creates a permanent, unchangeable log of all the transitions the data has gone through.

They don’t overwrite your data, so no data is ever lost. Each state-transition event is stored in a stream that can be read or queried as needed. You can move up and down the stream of events, giving you new insights and the power to make better, more informed decisions that you can trust.

EventStoreDB Relational DB
Streaming Data
Streaming Data
 Subscriptions give you real time changes Data can be overwritten, needs verification
Efficiency
Efficiency
 Save changes once, subscriptions propagate changes instantly Data needs to be recorded then changes pushed out to the system
Service Autonomy
Service Autonomy
 Stop and start self-validating streams as needed Needs to be rebuilt gracefully in line with other systems
Event Driven Architecture
Event Driven Architecture
 Build complex workflows and react in real time All solutions need to consider the different forms of data
Time Travel
Time Travel
 Move through the event stream in any direction for analysis and forecasting Not always easy or possible, changelogs might be needed
Root Cause Analysis
Root Cause Analysis
 Trace events back to their roots, making analysis easy and faultless. Refer back to changelogs, check external data sources, piece together information
Legacy Migration
Legacy Migration
 When older systems need replacing, do it at your pace. Needs long term planning, down time and to happen all at once.

Why use EventStoreDB?

Businesses today are driven by digital events happening in real time. An event in one area of the business triggers a response in an app that runs another. These apps and services must respond constantly, without delay or data loss. Scale is mission-critical because there are thousands or even millions of events occurring every minute of every day. Without a single, foundational database of these events, today’s apps and services can’t work. Failure is inevitable. EventStoreDB is the only native event database that provides the record of events to support these new apps and services.

  • Guaranteed writes
  • Multiple client interfaces
  • Great performance that scales
  • Immutable data store
  • High availability
  • Optimistic concurrency checks
  • Multiple hosting options
  • Atom subscriptions
  • Projections
  • Subscribe to streams with competing consumers
  • Commercial support plans
More about EventStoreDB

Learn EventStoreDB

It’s easy to get started with EventStoreDB.

If you are a new user, follow our getting started guide for step-by-step instructions on downloading and installing EventStoreDB, and writing sample applications to write and read events.

If you know the basics but want to know more, check out our tutorials for in-depth guides on specific features or use cases of EventStoreDB, our docs section for technical documentation, or head over to the community forum where we have an active community of users.

Getting started guideTutorials

code-esdb-right