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Opdb alternatives & similar sites

OPDB | Open Pinball Database — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Databases →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
postgresql.org ↗	75 match shared topic	PostgreSQL: The world's most advanced open source database	en	databases	robotsllmsaihumans	emailphone	none
mariadb.com ↗	75 match shared topic	MariaDB Enterprise Open Source Database \| MariaDB	en	databases WordPress WooCommerce	robots llmsaihumans	emailphone	none
percona.com ↗	75 match shared topic	Open Source Database Software, Support and Services - Percona	en	databases WordPress	robotsllmsaihumans	emailphone	none
dbeaver.io ↗	75 match shared topic	DBeaver Community \| Free Open-Source Database Management Tool	en	databases WordPress	robotsllmsaihumans	emailphone	none
ebsco.com ↗	65 match shared topic	EBSCO - Research Databases, EBooks, Discovery Service	en	databases	robotsllmsaihumans	emailphone	none
adminer.org ↗	65 match shared topic	Adminer - Database management in a single PHP file	en	databases	robotsllmsaihumans	emailphone	none
prometheus.io ↗	65 match shared topic	Prometheus - Monitoring system & time series database	en	databases	robotsllmsaihumans	emailphone	none
clickhouse.com ↗	65 match shared topic	Fast Open-Source OLAP DBMS \| ClickHouse	en	databases	robots llmsaihumans	emailphone	none
red-gate.com ↗	65 match shared topic	Redgate — Database DevOps tools for SQL Server, Oracle & PostgreSQL	en	databases	robotsllmsaihumans	emailphone	none
duckdb.org ↗	65 match shared topic	DuckDB – An in-process SQL OLAP database management system	en	databases	robotsllmsaihumans	emailphone	none
sqlalchemy.org ↗	65 match shared topic	SQLAlchemy - The Database Toolkit for Python	en	databases	robotsllmsaihumans	emailphone	none
noteforms.com ↗	65 match shared topic	Create beautiful forms to fill your Notion databases - NoteForms	en	databases	robotsllmsaihumans	emailphone	none
exasol.com ↗	65 match shared topic	Exasol: The analytics database \| DWH, Acceleration, AI & ML	en	databases WordPress	robotsllmsaihumans	emailphone	none
db-engines.com ↗	65 match shared topic	DB-Engines - Knowledge Base of Relational and NoSQL Database Management Systems	en	databases	robotsllmsaihumans	emailphone	partial · 2
pingcap.com ↗	65 match shared topic	Database for AI Agents \| TiDB Distributed SQL \| TiDB	en	databases WordPress	robotsllmsaihumans	emailphone	none
tigergraph.com ↗	65 match shared topic	AI-Powered Graph Database for Real-Time Analytics & Connected Data \| TigerGraph	en	databases WordPress	robotsllmsaihumans	emailphone	none
datasette.io ↗	65 match shared topic	Datasette: An open source multi-tool for exploring and publishing data	en	databases	robotsllmsaihumans	emailphone	none
analyticalresultsdb.com ↗	65 match shared topic	Analytical results database and visualization software - ArDB	en	databases Concrete5	robotsllmsaihumans	email phone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.