Oracle EBS 19c vs 23c vs 26ai: What Changes for Oracle EBS Customers

If you run Oracle E-Business Suite, you have likely heard the name Oracle 26ai by now. But if you are still on Oracle 19c, the database release that most enterprise EBS environments run on today, you may be wondering what has actually changed, what Oracle 23ai was, where Oracle 26ai fits, and whether the Oracle 26ai upgrade is relevant to your organization now or something to plan for later.

This blog answers those questions directly, with a factual, side-by-side comparison of Oracle 19c, Oracle 23ai, and Oracle 26ai, covering what is different, what it means for EBS customers operationally, and how to think about the upgrade path from where you are today.

First: Why This Comparison Matters Now

Oracle 19c has been the dominant enterprise database release since 2019. It is stable, widely certified, and deeply familiar to Oracle EBS teams. For most of the past five years, ‘staying on 19c’ was a defensible position, supported, secure, and operationally predictable.

That calculus is shifting in 2026, for three specific reasons:

Extended support for Oracle Database 11.2.0.4 ended in December 2020, and for 12.1.0.2 in July 2022. Organizations on those releases are already operating without Oracle-issued security patches.

Beginning May 2026, Oracle moves to a monthly Critical Security Patch Update (CSPU) cycle, increasing the operational burden of maintaining security compliance on any release that is not current.

Oracle 26ai Features introduce a category of enterprise capability, AI-native database operations, that is not available on 19c or 23ai at production scale. Organizations that remain on older releases are not just deferring an upgrade; they are forgoing a structural competitive advantage.

Understanding the differences between Oracle 19c, 23ai, and 26ai is only the first step. The bigger question is how Oracle Database 26ai fits into your broader Oracle EBS modernization and AI roadmap.

Download our eBook to learn why Oracle modernization is becoming part of enterprise AI strategy and how Oracle Database 26ai supports AI readiness without replacing Oracle EBS.

Understanding the Three Releases: 19c, 23ai, and 26ai

Oracle Database 19c: The Long-Term Support Workhorse

Oracle Database 19c was released in 2019 and designated as a Long-Term Support (LTS) release, the same strategic designation Oracle reserves for platforms it intends customers to run for a decade or more. It remains the most widely deployed Oracle database release in production enterprise environments globally.

19c introduced full multitenant architecture maturity, Real Application Clusters (RAC) enhancements, and JSON document store capabilities. It is a highly stable, production-hardened platform. What it is not is an AI-native platform. All AI workloads in a 19c environment require separate infrastructure, vector databases, embedding models, and LLM connectors- built and maintained alongside the production database.

Oracle Database 23ai: The Innovation Release

Oracle Database 23ai was Oracle’s first AI-branded database release, announced in 2023. It introduced several foundational capabilities that would define Oracle’s AI database direction: early vector search, JSON Relational Duality, True Cache, and an initial version of Select AI. It was positioned as Oracle’s ‘AI for developers’ release.

Critically, Oracle 23ai was an Innovation Release, not a Long-Term Support designation. Innovation Releases are stepping stones: they introduce new capabilities and receive updates, but they are not intended as long-term production platforms for enterprise organizations. Oracle 23ai was the proof of concept at scale. Oracle 26ai is where those capabilities matured into production-grade enterprise features.

Oracle 23ai was never intended as a long-term enterprise platform. If your organization is evaluating a production database destination, Oracle 26ai, not 23ai, is the correct target.

Oracle Database 26ai: The AI-Native Long-Term Support Release

Oracle AI Database 26ai was announced at Oracle AI World in October 2025 and released for on-premises Linux x86-64 environments in January 2026. It replaces Oracle Database 23ai and carries the Long-Term Support designation, putting it in the same strategic category as Oracle 19c.

The naming shift from 23ai to 26ai is deliberate. Oracle incorporated two years of cloud-validated AI capability refinements, security enhancements, and production-hardening before delivering the on-premises release. Oracle 26ai Features are not previews or betas, they are the production-grade realization of the AI database direction Oracle has been building since 23ai.

EBS 12.2 is formally certified on Oracle Database 26ai for on-premises Linux x86-64 deployments as of April 2026. The upgrade path from 19c is direct via Oracle’s AutoUpgrade utility. For organizations on 23ai, applying the October 2025 Release Update is all that is required — no database upgrade, no application re-certification.

Oracle 19c vs 23ai vs 26ai: Feature-by-Feature Comparison

The table below covers the capabilities that matter most for Oracle EBS customers evaluating their database modernization roadmap.

Oracle 26ai Features: What EBS Customers Actually Get

1. Oracle 26ai Vector Search: Eliminating the Separate AI Infrastructure

The most immediate structural change in Oracle 26ai Features is Vector Search. In a 19c environment, any AI use case that requires similarity search, finding documents, images, or records that are semantically related, requires a separate vector database alongside the Oracle environment. That means duplicated data, synchronization overhead, a separate security model, and an entirely separate system to manage.

Oracle 26ai Vector Search stores embeddings natively alongside business records in the same Oracle database, using the native VECTOR data type. The same security controls, the same backup procedures, and the same access policies apply because it is the same database.

For EBS customers, this means AI use cases that query EBS data, procurement intelligence, financial analytics, contract search, and HR document retrieval can be built without a parallel infrastructure project.

2. Select AI: Natural Language Access to EBS Data

Oracle 26ai Features include Select AI at general availability, a capability that allows users to query Oracle databases using natural language prompts via SQL when an AI profile and provider are configured. A finance director can ask ‘Which suppliers exceeded payment terms by more than 30 days last quarter?’ and receive a result drawn directly from EBS transactional data, with full database security applied.

In 19c, this kind of interaction required a custom application layer, an external LLM integration, and a data export process. Select AI in Oracle 26ai Features brings that capability inside the database, no external data movement, no custom development, no separate security model.

3. AI-Assisted Performance Management: The Operational Shift

One of the Oracle 26ai Features that receives less attention than Vector Search or Select AI, but matters enormously for EBS operations, is AI-assisted performance management. This capability transforms how database performance is monitored and maintained.

In Oracle 19c, performance management is reactive: the DBA waits for a user to report slowness, opens AWR and ASH reports, manually traces the issue to a SQL regression or resource contention event, and applies a fix after the business has already been impacted. In Oracle 26ai, the database continuously monitors workload behavior, detects anomalies before they surface as user complaints, identifies root causes, and automatically recommends or applies optimizations.

For EBS organizations running high-volume OLTP cycles, financial close, payroll processing, and quarter-end reporting, this is not a convenience feature. It is a business continuity improvement that reduces unplanned downtime and lowers DBA overhead simultaneously.

4. Agentic AI Workflows: AI That Operates on Live EBS Data

Oracle 26ai Features include full support for agentic AI workflows: AI agents that operate within the database boundary, combining private EBS data with public information to deliver answers and take actions. Oracle Unified Memory Core gives agents stateful, persistent memory inside the database engine. The Oracle AI Database Private Agent Factory is a no-code platform for deploying these agents without custom development.

For EBS customers, this opens the ability to build AI agents that answer natural language questions on EBS KPIs, automate operational tasks, and deliver real-time business insights — without exporting sensitive ERP data to external AI services.

5. Quantum-Resistant Encryption: A Security Posture Upgrade

Oracle 26ai Features include ML-KEM encryption with hybrid key exchange for TLS 1.3 connections. This is not available in Oracle 19c or Oracle 23ai. As regulatory environments begin incorporating post-quantum cryptography requirements, organizations on 26ai will already be compliant. Those on 19c will face a retrofit.

The Oracle 26ai Upgrade Path for EBS Customers

The upgrade path to Oracle 26ai depends entirely on where you are starting from. Here is what each scenario looks like:

IMPORTANT ARCHITECTURE NOTE

Non-CDB configurations are no longer supported in Oracle Database 26ai. All deployments require CDB/PDB (Container Database / Pluggable Database) architecture. Organizations running Non-CDB must plan this migration as part of their Oracle 26ai upgrade, it cannot be deferred to a later step.

Which Release Should Oracle EBS Customers Be On?

The answer depends on your current environment, but the strategic destination is clear.

• If you are on Oracle 19c: Plan the Oracle 26ai upgrade. 19c remains supported, but every month on 19c is a month without Oracle 26ai Features, including parallel OLTP and vector AI, proactive performance management, Select AI, and quantum-resistant encryption. Begin with a readiness assessment to define sequencing, architecture requirements, and EBS compatibility.
• If you are on Oracle 23ai: Apply the October 2025 Release Update. This is all that is required to activate Oracle 26ai Features. There is no upgrade process, no re-certification, and no operational disruption. This is the simplest path to the full Oracle 26ai Feature set.
• If you are on Oracle 12c or 11g: Upgrade to 19c as an immediate priority, then proceed to 26ai. Extended support has already ended. The security exposure on these releases is current and growing.

Oracle 23ai was an Innovation Release. It is not the long-term destination. Oracle 26ai is the Long-Term Support platform Oracle intends for enterprise organizations to run for the next decade, the same strategic designation that Oracle 19c has held since 2019.

Frequently Asked Questions (FAQs)

1. What is the main difference between Oracle 19c and Oracle 26ai for EBS customers?
   Oracle 19c is a proven, stable Long-Term Support release with no native AI capabilities. All AI workloads require a separate infrastructure layer. Oracle 26ai Features include native AI Vector Search, Select AI, agentic workflows, and AI-assisted performance management, running alongside OLTP workloads in the same database engine. The Oracle 26ai upgrade eliminates the need for a separate AI infrastructure stack entirely.
2. Is Oracle 23ai a replacement for Oracle 19c?
   No. Oracle 23ai was an Innovation Release, not a Long-Term Support designation. It was not intended as a long-term enterprise production platform. Oracle 26ai is the Long-Term Support release that carries Oracle’s AI capabilities into the enterprise production tier.
3. What Oracle 26ai Features are most relevant for EBS customers?
   The five Oracle 26ai Features with the most direct EBS operational impact are:
   (1) AI Vector Search- eliminating the separate vector database
   (2) Select AI- natural language queries against EBS data
   (3) AI-assisted performance management- proactive monitoring replacing reactive DBA troubleshooting
   (4) Agentic AI workflows- AI agents operating on live EBS data
   (5) Quantum-resistant encryption- ML-KEM for post-quantum compliance readiness.
4. Do we need to move to cloud to use Oracle 26ai Features?
   No. Oracle 26ai Features are available on-premises. The Enterprise Edition for Linux x86-64 became generally available in January 2026. EBS 12.2 is certified on-premises. Cloud migration is not a requirement for Oracle 26ai adoption.
5. How long does the Oracle 19c to 26ai upgrade take?
   Timing depends on environment complexity, customization footprint, infrastructure configuration, and whether CDB/PDB migration has already been completed. Organizations typically begin with a readiness assessment to define sequencing and timeline before committing to an upgrade schedule.
6. Are Oracle 26ai Features like Vector Search an additional cost?
   No. Oracle has confirmed that advanced AI features, including Oracle 26ai Vector Search, are included in Oracle 26ai at no additional license charge. This removes the pricing barrier that previously led organizations to build separate, lower-cost vector infrastructure, with all the integration complexity that comes with it.