#1
PostgreSQL

PostgreSQL

★★★★★ 4.8 Free Free plan

Powerful open-source relational database system known for reliability, feature robustness, and standards compliance, supporting SQL and JSON data types.

sql-queriesjson-supportfull-text-searchextensions
✓ Completely free and open source✓ Extremely reliable with decades of development✓ Advanced features like JSON, full-text search, and PostGIS
#2
Kestra

Kestra

★★★★ 4.4 Free / $100+ Free plan

Open-source orchestration platform for building scheduled workflows, data pipelines, and event-driven automations with declarative YAML and 500+ plugins.

workflow-orchestrationschedulingevent-triggersplugins
✓ Open-source with full orchestration capabilities✓ Declarative YAML workflows (GitOps friendly)✓ 500+ plugins for data, cloud, and messaging services
#3
Hasura

Hasura

★★★★ 4.4 Free / $99+ Free plan

Instant GraphQL and REST APIs on your data with authorization and caching.

graphql-apirest-apireal-timeauthorization
✓ Instant APIs✓ Real-time subscriptions✓ Great developer experience

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