Exasol vs PostgreSQL

Exasol is a database for analytics and high-concurrency AI workloads, available in cloud, on-premises, hybrid, and fully managed SaaS deployments. The company says teams can analyze billions of rows in seconds and that automatic self-indexing helps tune performance. SaaS includes five databases, multi-cluster support, basic UDF support, advanced in-database analytics, and data virtualization. Teams can scale vertically or add clusters with dedicated compute for work such as data ingest or machine learning. The 30-day SaaS trial includes $200 of usage and requires no credit card. Pay-as-you-go compute is billed hourly; XS is $3.30 a month and S is $6.60 a month, while storage is listed separately at $25 a month. Free options include Exasol Personal, licensed for a single user and up to two connected data sources, and Community Edition, limited to 200GB of data. Exasol lists integrations including Airbyte, Alation, Amazon QuickSight, Apache Airflow, and Apache Superset. Its documentation covers multiple authentication methods and TLS encryption for database connections; encryption at rest must be configured on the supplied file systems and devices.

PostgreSQL is a free, open-source database system for storing and scaling complex data workloads. It uses SQL and adds object-relational capabilities, with support for primitive and structured values as well as documents, geometric data, and custom types. Its supported formats include JSON/JSONB, XML, arrays, ranges, and UUIDs. For data integrity, it provides keys, constraints, locks, transactions, savepoints, and SQL-standard transaction isolation levels. Performance tools include multiple index types, query planning and optimization, parallel processing, partitioning, just-in-time expression compilation, and asynchronous I/O. Recovery and availability features include write-ahead logging, several replication methods, point-in-time recovery, and active standbys. Security options include multiple authentication methods, access controls, row- and column-level security, and multi-factor authentication. Extensions, procedural languages, and foreign data wrappers can connect PostgreSQL to other databases or streams. It runs on Linux, macOS, and Windows, and is self-hosted; no managed service is listed. The PostgreSQL License permits use, copying, modification, and distribution without a fee, subject to its conditions.