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FactQL AI vs LlamaIndex
Short answer: Pick FactQL AI if you want verified natural-language data queries; pick LlamaIndex if you want agentic OCR for complex docs. Both have a free plan.
FactQL AIAdd "ask your data" to your app in one API call
LlamaIndexFramework for LLM apps and agents over your dataWhich to pick
Pick FactQL AI if you want…
- Verified natural-language data queries
- Integrations with PostgreSQL, MySQL or DuckDB (on FactQL AI's list, not LlamaIndex's)
Pick LlamaIndex if you want…
- Agentic OCR for complex docs
- LLM data-app framework
- Integrations with Microsoft Azure Marketplace (on LlamaIndex's list, not FactQL AI's)
Side by side
- What it is
- FactQL AI:FactQL AI provides an API that lets apps ask natural-language questions over databases, spreadsheets or PDFs and returns verified SQL, results and lineage.
- LlamaIndex:LlamaParse converts complex documents into structured, AI-ready data with agentic OCR and extraction.
- Best for
- FactQL AI:Verified natural-language data queries
- LlamaIndex:Agentic OCR for complex docs
- Who it’s for
- FactQL AI:Developers building AI agents or apps that need trustworthy data answers.
- LlamaIndex:Developers building AI agents and RAG pipelines that need accurate document parsing.
- Pricing
- FactQL AI:Freemium
- LlamaIndex:Freemium
- Free plan or trial
- FactQL AI:Free plan (Free) · Free trial
- LlamaIndex:Free plan (Free)
- Plans
- FactQL AI:Free $0
- LlamaIndex:Free $0
- Open source
- FactQL AI:Yes, 0 GitHub stars
- LlamaIndex:Yes, 52,381 GitHub stars
- Works with
- FactQL AI:PostgreSQL, MySQL, DuckDB, CSV, XLSX, PDF, Claude, Cursor
- LlamaIndex:Microsoft Azure Marketplace
FactQL AI features
- One-call API. Send a plain-English question via a single POST and receive answer, SQL, rows and lineage in JSON.
- Execution-verified answers. The model drafts a query, runs it, verifies results and self-corrects before responding.
- Multi-source support. Connect to Postgres, MySQL, DuckDB, CSV/XLSX files or cited PDFs through the same endpoint.
- Fail-closed isolation. If verification fails the API returns a 4xx error, never guessing or exposing wrong numbers.
- Embeddable chat component. Add a drop-in chat UI for end-users with private conversations via X-End-User-Id.
- MCP server integration. Expose the service to Claude, Cursor, VS Code or any MCP-compatible app without installing anything.
LlamaIndex features
- Agentic OCR. Layout-aware parsing of tables, charts, images and handwriting with high accuracy.
- Schema-based Extraction. Turn unstructured content into structured JSON using LLM-powered agents without training.
- Document Splitting & Classification. Automatically segment and categorize documents using natural-language rules.
- Enterprise Indexing. Chunking and embedding pipeline for precise retrieval in RAG applications.
- LiteParse Local Engine. Open-source, fast, on-device parsing of PDFs, Office files and images with no cloud limits.
- Security & Compliance. SOC 2, GDPR, HIPAA compliance with encryption, VPC deployment and granular access controls.
FactQL AI vs LlamaIndex FAQ
What is the difference between FactQL AI and LlamaIndex?+
LlamaIndex is a framework for building LLM apps over data, while FactQL offers a ready-made verified query API.
Should I use FactQL AI or LlamaIndex?+
Pick FactQL AI if you want verified natural-language data queries or integrations with PostgreSQL, MySQL or DuckDB (on FactQL AI's list, not LlamaIndex's). Pick LlamaIndex if you want agentic OCR for complex docs, LLM data-app framework or integrations with Microsoft Azure Marketplace (on LlamaIndex's list, not FactQL AI's).
Is FactQL AI or LlamaIndex free?+
FactQL AI has a free plan and paid plans. LlamaIndex has a free plan and paid plans.
Is FactQL AI or LlamaIndex open source?+
Yes, both are open source: FactQL AI (factql/factql-mcp on GitHub, MIT license) and LlamaIndex (run-llama/llama_index on GitHub, MIT license).
Do FactQL AI and LlamaIndex integrate with the same tools?+
Their integration lists don't overlap: FactQL AI lists PostgreSQL, MySQL, DuckDB, CSV and 5 more; LlamaIndex lists Microsoft Azure Marketplace.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.