# Controllable FOSS

> Sovereign Self-Hosting
---

> Grounded like the earth, gathering all rivers—standing firm while gazing at the stars!


**Software Freedom**


        Self-hosting democratized



**Local-First**


        Run on-premises indefinitely



**Multi-Cloud**


        No vendor lock-in



**Free Extensions**


        437 PostgreSQL extensions



**Data Ownership**


        Pay fair cost for resources



**Friendly License**


        AGPLv3 preserving freedom



**Compliance Ready**


        Meeting domestic requirements



**Expert Support**


        Top-tier PostgreSQL specialists





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## Software Freedom: Self-hosting democratized {#software-freedom}

> 100% built upon open-source components\
> A gift to the PostgreSQL community

- No license fees or usage limits
- Free at any scale
- A reciprocal open-source ecosystem

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## Local-First: Run on-premises indefinitely {#local-first}

> Fully functional even offline\
> Running forever without external dependencies

- Supports offline deployment and installation
- Software snapshotted to local repo
- Deployable on physical, bare metal, VM, and container VMs

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## Multi-Cloud: No vendor lock-in {#multi-cloud}

> Build your own full-stack DBaaS\
> Reduce clouds to mere resource providers

- Use Terraform to provision servers across clouds
- Blue-green migration via logical replication
- Cloud services remain optional

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## Free Extensions {#free-extensions}

> 437 PostgreSQL extensions ready to use\
> Built for PG 17-13 on mainstream distributions

- Compatible with ten major Linux distros
- Out-of-the-box RPM/DEB packages
- Easy installation via extension catalog

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## Data Ownership {#data-ownership}

> Pay for resources at fair cost\
> Enjoy cutting-edge hardware advantages

- Pay roughly 1% of cloud pricing
- Obtain full database superuser privileges
- Bypass external RDS support chains

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## Friendly License {#friendly-license}

> AGPLv3 License preserving software freedom\
> Essentially Apache 2.0 for end users

- Mirrors permissive use for typical users
- Commercial licenses available for DBaaS/OEM

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## Compliance Ready {#compliance-ready}

> Ranked #1 among China-led PG projects\
> Meets domestic requirements

- Supports PolarDB v2.0 kernel
- Enterprise Edition supports domestic OS/chips
- Aligned with best practices

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## Expert Support {#expert-support}

> Top-tier PostgreSQL specialists\
> Affordable subscription plans

- Service guarantees for PG and OS
- Senior experts provide guidance
- Multiple support tiers available