whichdb

Epsio

active

by Epsio Ltd. · since 2023

An incremental view engine that keeps complex SQL results fresh inside your existing Postgres or MySQL.

relationaldatabase engineproprietaryemerging
Website Docs Compare Find similar

Overview

Epsio sits beside an existing database, reads its replication stream, and maintains the results of expensive SQL queries incrementally, writing them back into a regular results table in the same database. Applications just query that table, so there is no new query endpoint to adopt. It targets Postgres, MySQL and SQL Server users who use materialized views or denormalized caches that are slow to refresh. It runs inside your cloud account and data does not leave your environment. It is a small, commercial startup product with little public release information, so evaluate it carefully before you depend on it.

Real-time analyticsStream processingCaching

Strengths & trade-offs

Strengths

  • +Results land in normal tables in your existing database
  • +No new query engine for applications to adopt
  • +Handles joins and aggregations incrementally from CDC
  • +Runs inside your environment

Trade-offs

  • −Proprietary with unpublished pricing
  • −Little public release information and a small vendor
  • −Results lag the source by replication delay
  • −Adds write load to the primary when writing results back

Great for

  • +Speeding up slow dashboards and reports on OLTP Postgres
  • +Replacing REFRESH MATERIALIZED VIEW cron jobs
  • +Maintaining denormalized tables automatically

Think twice for

  • −Teams needing open-source software
  • −Streaming from Kafka or non-database sources

Capabilities

Native or official first-party support · 4 of 25 tracked

✓Joins
✓Change data capture
✓Materialized views
✓Streaming ingest
–Transactions
–Secondary indexes
–Full-text search
–Vector search
–Geospatial
–JSON
–Triggers
–Stored procedures
–TTL / expiry
–Pub/Sub
–Columnar storage
–In-memory
–Durable persistence
–Compression
–Encryption at rest
–Role-based access
–Time travel
–Branching
–Online schema changes
–Offline sync
–Runs in WebAssembly

Scale & consistency

Comfortable data size
Medium · ≤ 10 TB
Horizontal scaling
None
Multi-region
No
Transactions
Limited ACID
Consistency
Eventual
Schema
Strict
Architecture
Single node, Client server
Query languages
SQL

Deployment

Self-hosted Vendor-managed cloud Serverless Embedded Edge Kubernetes operator

available on · AWS · Google Cloud · Azure

Ecosystem

compatible withPostgreSQL, MySQL, SQL Server
apis & protocolsPostgreSQL wire protocol, MySQL protocol
client languagesAny Postgres/MySQL driver

Alternatives to Epsio

Compare all→
MaterializeRelational15.7

A Postgres-compatible operational data warehouse that keeps SQL views incrementally up to date.

epsio vs materialize →
ReadysetRelational12.7

A wire-compatible SQL cache for Postgres and MySQL that keeps cached queries fresh from replication.

epsio vs readyset →
FelderaRelational15.8

An incremental SQL engine grounded in DBSP theory that updates any SQL query from changes only.

epsio vs feldera →
RisingWaveRelational17.4

An Apache-licensed, Postgres-compatible streaming database that stores state on S3 and writes Iceberg.

epsio vs risingwave →
ArroyoRelational5.4

A Rust stream processor with SQL pipelines, now owned by Cloudflare and powering Cloudflare Pipelines.

epsio vs arroyo →
Oracle TimesTenRelational9.5

Oracle's in-memory relational database: microsecond SQL, PL/SQL, and a cache tier for Oracle Database.

epsio vs oracle-timesten →

Epsio FAQ

What is Epsio?

Epsio is a relational database by Epsio Ltd., first released in 2023. Epsio sits beside an existing database, reads its replication stream, and maintains the results of expensive SQL queries incrementally, writing them back into a regular results table in the same database. Applications just query that table, so there is no new query endpoint to adopt. It targets Postgres, MySQL and SQL Server users who use materialized views or denormalized caches that are slow to refresh. It runs inside your cloud account and data does not leave your environment. It is a small, commercial startup product with little public release information, so evaluate it carefully before you depend on it.

Is Epsio open source?

No. Epsio is proprietary, closed-source software. License: Commercial license.

Does Epsio support ACID transactions?

Partly. Epsio offers limited ACID guarantees (for example, single-record or single-partition transactions), with eventual consistency.

Does Epsio scale horizontally?

Epsio does not scale horizontally; it runs on a single node, so you scale it up rather than out. It is comfortable at medium scale (≤ 10 TB).

How can I run Epsio?

You can self-host it. It is available on AWS, Google Cloud and Azure.

What is Epsio best for?

Epsio is a strong fit for speeding up slow dashboards and reports on OLTP Postgres; replacing REFRESH MATERIALIZED VIEW cron jobs; and maintaining denormalized tables automatically. Think twice for teams needing open-source software.

What are the best alternatives to Epsio?

Common alternatives to Epsio include Materialize, Readyset, Feldera, RisingWave and Arroyo. The right choice depends on your workload, scale and hosting; WhichDB's smart match ranks them against your requirements.

How popular is Epsio?

Epsio has little measurable public adoption today, so it ranks near the bottom of the WhichDB Score.