Structr is unclaimed —

Structr

structr.org

Structr is an open-source low-code platform for building complete, data-driven web applications from a single integrated environment. It combines a graph database (Neo4j), a visual schema editor, automatic REST APIs, server-side scripting, a page rendering engine, and a built-in security system in one self-hosted platform. It is developed by Structr GmbH in Germany and runs on the user's own infrastructure.

What it's for

Internal business applications (project management, asset tracking, CRM, ticketing)Data management platforms with complex access control requirementsCustomer portals and self-service applicationsDocument and content management systemsApplications integrating data from multiple external sources (via JDBC, MongoDB, MQTT, Kafka, Pulsar, REST)Workflow and process automation toolsPrototypes and MVPs that need to evolve into production systems

Features 20

Automatic REST API generation with CRUD, filtering, sorting, and pagination
Configurable JSON views to control exposed properties
Cron job scheduling
Event-action mappings linking DOM events to backend operations
File management with custom metadata
Flow Editor for visual, node-based workflow automation
Graph database backend (Neo4j) with Cypher query support
Instant, migration-free schema changes
Lifecycle callbacks on data changes
Localization support
Mail templates
Multi-site hosting
OAuth 2.0, JWT, JWKS validation, two-factor authentication, and SSL/TLS security
Server-Sent Events for real-time updates
Server-side JavaScript scripting on GraalVM
Server-side page rendering engine with template expressions and repeaters
Spatial indexing
StructrScript expression language
User and group management with object-level permissions and visibility flags
Visual schema editor for defining types, properties, and relationships

At a glance

free tierfree trialopen sourceself-hostableAPI

TypeWeb app

DeploymentSelf-hosted

PlatformsWeb, Linux

Forgovernments, public institutions, defense contractors, healthcare organizations, enterprises in regulated industries, organizations in Europe

CompanyStructr GmbH

Integrations

Neo4jMemgraphAmazon NeptuneMongoDBMQTTKafkaApache PulsarFTPIMAPRSSGoogleAzureGitHub

Complianceself-reported

GDPR

Resources

Pricing

The core platform is open source and self-hosted with no stated licensing fee. A free 14-day cloud-hosted sandbox is offered with no credit card required; after 14 days users can upgrade to a paid plan to keep the sandbox running, but no price figures are shown.