Migrating from Oracle to PostgreSQL does not have to be a custom job
This way you keep control over your database without hidden costs
Imagine this: you finally decide to switch to PostgreSQL because you’re done with expensive Oracle licenses. You choose an “enterprise Postgres” solution that promises to retain all the benefits of open source, but after a year you discover that your data is locked into proprietary extensions that you can’t easily replace – and that you have far less flexibility than expected. This scenario happens more often than you might think. The rapid growth of PostgreSQL is attracting many vendors, cloud providers, and managed service providers who add their own layers on top of the community version, resulting in hidden costs and vendor lock-in. That is exactly the opposite of what you aim for with open source. In this blog, Edco Wallet explains how to recognize true open-source PostgreSQL and avoid vendor lock-in.
PostgreSQL is completely open source. Period. Yet many vendors offer their own “enterprise Postgres” variants that can significantly differ from the original community version.
The PostgreSQL MIT license even allows vendors to change nothing at all in the software and still charge money for it. The result is the emergence of various forks of PostgreSQL, which often struggle to remain compatible with the rapid developments in the open-source version.
The difference lies in the details. The community release is 100% open source, with no mandatory patches or paid add-ons. Vendor builds, on the other hand, often come with proprietary extensions, closed management tools, and complex licensing models. The result? You think you’re choosing open source, but you become invisibly tied to that specific vendor.
That’s why you should always check whether you’re working with the pure community version. Explicitly ask which components are proprietary and what will happen if you ever want to switch vendors.
Choosing open source does not automatically mean you will never become dependent on a vendor. Many providers and cloud platforms – think of AWS RDS for PostgreSQL or Azure Database for PostgreSQL – package monitoring, backups, and APIs into their own add-ons. For every extra feature – such as advanced replication or specialized analytics – you need to purchase additional licenses.
This is how “PostgrePay” arises: your data architecture appears open but is hidden behind proprietary layers. Before you know it, you’re dependent on extensions you cannot easily replace.
That’s why you should avoid non-standard extensions. Instead, choose proven open-source tools such as Patroni for high availability, pgBackRest for backups, and open-source monitoring solutions. These tools work just as well but keep you flexible.
Fully self-managing PostgreSQL gives you maximum control, but don’t underestimate the burden. Performance tuning, upgrade cycles, compliance overhead, and subtle configuration issues require a lot of time and specialized knowledge.
Kubernetes may be popular, but scaling stateless containers into enterprise-grade PostgreSQL environments is complex. You need to think about high availability, automation, tuning, and backups. This brings hidden personnel and resource costs, plus potential risks for continuity.
Therefore, weigh the costs of self-management against specialized support. Make a realistic assessment of the required expertise and time. Sometimes it’s smarter to bring in support than to try to handle everything yourself.
Many organizations think they need to migrate everything to PostgreSQL all at once. That is not only unnecessary but also riskier than a phased approach.
Legacy databases such as Oracle, MySQL, and SQL Server often continue to run smoothly for many years. A parallel setup prevents risky “big-bang” migrations and spreads investments over time. In addition, it gives you the opportunity to gain experience with PostgreSQL before migrating critical systems.
Embrace multi-database support. Deploy PostgreSQL where it delivers value and keep existing systems operational until you are ready. This approach provides flexibility and significantly reduces risks.
Regulations such as GDPR, HIPAA en PCI-DSS often requires additional encryption, auditing, and access controls. Many organizations “buy” compliance by diving into proprietary systems. Vendor-managed services offer this, but they tie you to their platform and make migration difficult and costly.
The result: you may meet regulatory requirements, but you lose control over data ownership and migration options.
That’s why you should use native PostgreSQL features such as pgAudit, role-based access, and transparent encryption. Choose tooling that works consistently both on-premise and across all cloud environments. This way, you maintain control while remaining fully compliant.
“Enterprise-edities” stuwen licentietarieven op door add-ons voor high availability, monitoring of sharding aan te bieden. Het ironische? Die features zitten al in PostgreSQL zelf of zijn beschikbaar als gratis extensies.
Vendor-prijzen zijn vaak gebaseerd op cores, gebruikers of datagrootte – die kosten lopen snel op. Voor je het weet, zit je vast aan meerjarencontracten met onverwachte budgetoverschrijdingen.
Vergelijk daarom de totale kosten van vendor-oplossingen met gratis community-mogelijkheden en open-source-alternatieven. Op lange termijn scheelt dat vaak behoorlijk wat geld.
PostgreSQL offers fantastic possibilities, but only if you make the right choices. Check whether you’re really working with the community version or with a vendor build. Avoid proprietary add-ons and choose proven open-source tools for HA, backups, and monitoring.
The choice for a variant other than the 100% open-source community version is really only justifiable if it provides something you truly need and cannot get anywhere else. For example, enterprise support, our partner EDB for example, also offers enterprise support on the 100% community version.
Plan in phases and embrace multi-platform adoption – migrate at your own pace. Calculate the real costs, including personnel and compliance overhead of self-managed PostgreSQL. And ensure that your data landscape remains portable between on-premise and any cloud.
With this approach, you stay in control, lower your total costs, and harness the power of PostgreSQL without hidden lock-in.
Are you struggling with the choice between different PostgreSQL providers? Or would you like to know how to best approach a multi-platform strategy? OptimaData is multi-platform specialized and completely independent of enterprise vendors and cloud providers. Feel free to get in touch and discover how you can get the most out of open-source databases without hidden surprises.