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The RAG API
Upload, Search, Reason
Production-ready multimodal RAG. One API call. No GPUs to manage, no parsers to babysit, no vector DB to scale.
RESTÂ API
OpenAPI V3
LLM Agnostic
SOCÂ 2Â Type 1
HOW IT WORKS
Raw Document → Grounded Answer
LightOnOCR-2 • 1B
Ingest & Parse
Bulk-ingest your document base through a single API call. Sync from SharePoint, Teams, or ServiceNow. The parsing engine scores 83.2 on OlmOCR-Bench — beating every system evaluated, including models 9× its size.
NextPlaid • Rust • CPU-optimized
Chunk & Index
Intelligent splitting preserves context. The multi-vector database indexes each chunk with token-level precision finding the exact paragraph in a 200-page manual, not just "a related document.
LateOn • Multi-vector Retrieval
Retrieve & Rerank
Candidate pages are retrieved, then individually evaluated. Out of Pages 3, 4, and 6: "Page 3 relevant. Page 4 Â no. Page 6 yes." Only pertinent content reaches the LLM. Noise eliminated.
Any LLM • Grounded Output
Reason & Respond
Filtered context is sent to the LLM of your choice. Pick any model based on your privacy, cost, or performance requirements: open-source, commercial, or private.
The hardest part isn't building a RAG pipeline. It's keeping it current. We handle every upgrade, every migration, every month. Your integration stays stable. Your product stays ahead.
Buy vs. Build
You've Built Internal RAG
Now You Need It to Scale
Now You Need It to Scale
Parser maintenance. Model updates. Chunking edge cases. Vector DB scaling. That's infrastructure work, not product work.
Offload the plumbing. Keep the control.
Without LightOn API
Your current reality
Ongoing Maintenance
Parsers, OCR, chunking logic...
Custom ACL Implementation
Synced with your IAM
GPU Scaling
And inference optimization
Model Upgrades
Regression testing
With LightOn API
Your potential reality
Universal Ingestion Endpoint
PDF, Office, scans, HTML. We handle extraction and semantic chunking.
Native Workspace & Collection Isolation
SSO/SAML integration, audit logs out of the box.
Managed Pipeline
Optimized for low-footprint deployment (on-prem or private cloud).
Versioned API V3
Backward compatibility, controlled rollout.
Why LightOn API
What You Get That
You Can't Build or Buy Elsewhere
You Can't Build or Buy Elsewhere
Features
DIY RAG
Legacy Search
Cloud RAG
LightOn API
Complex tables & diagrams
Breaks
Text only
Basic
OCR-2 native
Search precision
Single vector
Keywords
Single vector
Multi-vector
On-premise / air-gapped
Complex DIY
Possible
Cloud only
3 GPUs
ACL enforcement
DIY
Partial
Varies
Doc-level
LLM flexibility
Locked
N/A
Vendor
Agnostic
Time to production
6-12 months
2-3 months
1-2 months
Now
Hardware Efficiency
Maximum Intelligence
Minimum Hardware Footprint
Minimum Hardware Footprint
Enterprise AI shouldn't require a nuclear power plant.
Our Search is engineered to run on constrained infrastructures (On-Premise or Private Cloud), maximizing the "Performance per Token" ratio.
Our Search is engineered to run on constrained infrastructures (On-Premise or Private Cloud), maximizing the "Performance per Token" ratio.
Optimized
We build and fine-tune specific Models to RAG tasks.
Quantization Mastery
High-speed inference with low VRAM usage.
Cost-Efficient Scaling
Scale your API usage without linearly exploding your GPU budget.
Developers use cases
What Will You Build?
Embed Search in your ERP
Functionality. Use our Search API to add a "Chat with Invoice" button directly inside your SAP/Salesforce UI.
Embed Search
Automated Support Agent
Functionality. Interact with an SQL database without writing complex queries.
Automated Support Agent
Legal Analysis Pipeline
Functionality. Create a workflow that uploads contracts to a secure Workspace and triggers a risk analysis prompt automatically.
Legal Analysis Pipeline
Developer Experience
Built by Developers,
for Developers
for Developers
Comprehensive Documentation
Full Swagger/OpenAPI V3 specs, "Quick Start" guides, and detailed recipes in the Paradigm Academy.
Standard Protocols
RESTful architecture easy to consume from Python, Node.js, Java, or Go.
Native Extensibility
Need to connect to live tools? The API supports the Model Context Protocol (MCP) to give the AI access to your internal APIs.
deployment
Deploy with Confidence
Security & Compliance
Key Certification (SOC 2 Type 1)
Flexible Hosting (Private Cloud, On-Premise, Air-Gapped)
Audit & Traceability (Complete activity tracking)
Access Management & Integration
Single Sign-On (SSO) & SCIM
Fine-Grained Permissions (ACL) (Per user and group)
Group Synchronization
Control & Advisory
Budget Control (Flat and predictable pricing)
Advanced Customization (Adapted to your specific needs)
Dedicated Expert Support (Implementation assistance)
Don’t just take our word for it
Hear from some of our amazing customers who are building faster
The expertise of their tech team and the rapid evolution of the product, such as the hybrid search feature, put them at the forefront of innovation.
JĂ©rĂ´me Lacaille
‍Emeritus Expert in Algorithms
‍Emeritus Expert in Algorithms
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Babbar needed an efficient SEO strategy enhancement through LLM technology to stay competitive in the dynamic SEO industry.
Sylvain Peyronnet
‍Co-founder & search engine specialist
‍Co-founder & search engine specialist
LightOn responded very quickly with tools that perfectly matched our needs, enhancing our document base and onboarding users without experience.
Achille Lerpinière
‍Chief Information & Technology Officer
‍Chief Information & Technology Officer
Built on Open Research.
Tested and trusted by the community.
Tested and trusted by the community.
42,060,936
Model downloads on Hugging Face
ModernBERT
LightOnOCR-2
GTE-ModernColBERT
Alfred-40B
LateOn-code
ColBERT-Zero
OriOn
...
3,239
Hugging Face likes
ModernBERT
LightOnOCR-2
GTE-ModernColBERT
Alfred-40B
LateOn-code
ColBERT-Zero
OriOn
...
2,035
Github stars
PyLate
NextPlaid
FastPlaid
ColGrep
PyLate-rs
...
534,000
PyPi downloads
PyLate
NextPlaid
FastPlaid
ColGrep
PyLate-rs
...
