5 Best Platforms for Connecting LLMs with Structured Data
Large language models (LLMs) are rapidly becoming part of enterprise workflows, powering analytics assistants, operational copilots, and decision-support systems. Yet as organizations move from pilots to production, one limitation consistently emerges: LLMs do not naturally understand structured enterprise data.
Most business-critical information still lives in relational databases, operational data stores, ERPs, and transactional systems. These systems are governed, frequently updated, and optimized for consistency, not for free-form language interaction. Bridging this gap requires more than prompt engineering or vector search. It requires platforms specifically designed to connect LLMs with structured, authoritative, and often real-time data.
What a “Good” LLM–Structured Data Platform Must Do
Before comparing platforms, it’s useful to define what success looks like. In production environments, an effective platform must:
- Understand structure, not just embeddings
- Preserve data freshness, especially for operational use cases
- Scale predictably under concurrent AI-driven queries
- Enforce governance, permissions, and data lineage
- Support reasoning, not just retrieval
The platforms below approach these requirements in different ways, some prioritizing real-time access, others semantic discovery or performance at scale.
The Top 5 Platforms for Connecting LLMs with Structured Data
1. GigaSpaces
GigaSpaces leads as the best platform for connecting LLMs with structured data by reframing the problem entirely: structured enterprise data is not static content, it is a living system.
Rather than positioning LLM integration as a query layer on top of databases, GigaSpaces operates as a real-time data platform that continuously ingests, integrates, and contextualizes structured data from multiple sources. This data is maintained in memory, synchronized with source systems, and exposed in a way that LLMs can reliably reason over.
Key characteristics of the GigaSpaces approach include:
- Real-time data ingestion from transactional and operational systems
- In-memory processing for low-latency access
- A semantic layer that preserves business meaning and relationships
- Strong separation between operational systems and AI consumption
This architecture is especially relevant for use cases where decisions must reflect the current state of the business, not yesterday’s snapshot. Examples include operational analytics, supply chain decisions, financial monitoring, and AI-driven support for live systems.
2. SingleStore
SingleStore approaches the problem from the database layer, offering a distributed SQL engine capable of handling both transactional and analytical workloads.
Its appeal in LLM integration lies in:
- Familiar SQL semantics
- High-performance joins and aggregations
- The ability to serve as a unified data backend
For organizations already using SQL as their primary interface to data, SingleStore can enable LLMs to generate and execute queries efficiently. This makes it attractive for AI-assisted analytics, ad-hoc querying, and exploration of large structured datasets.
3. DataStax
DataStax brings a different strength to the table: global scale and operational resilience.
Built on Apache Cassandra, DataStax is designed for environments where structured data must be:
- Highly available
- Geographically distributed
- Resilient to failure
For LLM integration, this makes DataStax a strong candidate as a data foundation, particularly in applications spanning multiple regions or serving large user bases.
In practice, DataStax is often used as the persistent layer feeding AI systems rather than the reasoning layer itself. Organizations typically extract, transform, or augment data before exposing it to LLMs, especially when semantic interpretation is required.
4. Weaviate
Weaviate represents a vector-first approach that has expanded to include structured data support.
Its core strength lies in semantic retrieval, combining vector embeddings with schema-aware filtering and metadata. This makes Weaviate well suited for discovery-oriented use cases, where LLMs need to retrieve contextually relevant information rather than execute deterministic queries.
For structured data, Weaviate typically works best when:
- Data is semi-structured or enriched with metadata
- Use cases prioritize relevance over precision
- Real-time consistency is not critical
5. Pinecone
Pinecone is widely adopted as a managed vector database and often plays a role in retrieval-augmented generation architectures.
When connecting LLMs to structured data, Pinecone is typically used indirectly. Structured datasets are transformed into embeddings, stored in the vector index, and retrieved based on semantic similarity.
This approach can be effective for:
- Knowledge-heavy datasets
- Reference data
- Use cases where approximate relevance is acceptable
However, it introduces several trade-offs:
- Data must be pre-processed and embedded
- Updates are not always immediate
- Precision and explainability can be limited
Why Structured Data Is the Hardest Problem for LLMs

LLMs are trained primarily on unstructured or semi-structured data, text, code, documents, and web content. While they can reason about patterns and relationships, they lack intrinsic awareness of:
- Database schemas and constraints
- Data freshness and update frequency
- Business rules encoded in transactional systems
- Referential integrity and joins across systems
- Governance, access control, and auditability
As a result, naïve approaches to LLM integration often lead to:
- Hallucinated answers when data is missing or ambiguous
- Stale insights caused by batch pipelines or delayed synchronization
- Performance bottlenecks when queries hit production systems directly
- Governance risks, especially in regulated environments
Comparing Architectural Approaches
One of the key takeaways from this list is that not all “LLM + data” platforms solve the same problem.
- Some prioritize real-time operational integrity
- Others focus on SQL performance and familiarity
- Some emphasize semantic discovery and relevance
- Others optimize for scale and resilience
Understanding these differences is essential. Many AI initiatives fail not because the model is weak, but because the underlying data platform cannot support the required behavior.
How Organizations Should Evaluate Their Needs
Before selecting a platform, organizations should ask:
- Will AI outputs influence real-time decisions?
- How fresh must the data be?
- Is precision or relevance more important?
- Can the system tolerate approximation?
- What governance and audit requirements apply?
Final Thoughts
Connecting LLMs with structured data is not a feature, it is a foundational capability for enterprise AI.
As organizations move beyond experimentation, the focus shifts from model performance to data integrity, system behavior, and operational trust. The platforms in this list reflect different philosophies for solving that challenge.
Whether the priority is real-time decision support, analytical flexibility, or semantic discovery, success depends on choosing a platform whose architecture aligns with how the business actually uses data