LLM Development - PromptApps

Custom LLM Development & Fine-Tuning

Build, train, and deploy enterprise-grade Large Language Models customized with your proprietary data, private architecture, and strict security compliance.

99.4% Domain Benchmark Accuracy
4X Faster Inference Latency
70% Cost Reduction vs Public APIs

End-to-End LLM Engineering for Enterprise AI

From domain adaptation and parameter-efficient fine-tuning to high-throughput inference serving, we engineer customized LLMs that deliver unmatched precision.

Custom LLM Pre-Training

Develop foundational domain models from scratch or train open-weight architectures on your private enterprise token datasets.

Fine-Tuning (PEFT, LoRA & QLoRA)

Adapt leading open-source models (Llama 3, Mistral, Qwen) using parameter-efficient fine-tuning for deterministic business outputs.

Enterprise RAG Architectures

Ground your LLMs with real-time vector search, contextual chunking, re-ranking models, and hybrid retrieval-augmented generation.

Model Quantization & vLLM Serving

Compress models via AWQ, GPTQ, and FP8 quantization while maximizing token throughput using high-performance inference engines.

Guardrails & Safety Alignment

Implement RLHF, DPO, strict PII masking, toxic prompt defense, and constitutional AI guardrails to eliminate hallucination risks.

Private On-Premise Deployment

Deploy custom LLMs into air-gapped VPCs, private clouds, or bare-metal GPU infrastructure with zero data leakage guarantees.

How Custom LLMs Deliver Value To Your Business ?

Unlock proprietary intellectual property, sovereign data governance, and high-precision language reasoning.

Domain Precision

Deep comprehension of industry-specific taxonomy, technical documents, and internal operational SOPs.

100% Data Privacy

Complete data sovereignty without streaming confidential enterprise prompts to third-party public clouds.

Cost Predictability

Eliminate volatile per-token public API bills by operating optimized, self-hosted private inference pipelines.

Proprietary IP Assets

Maintain full ownership of your custom fine-tuned weights, embeddings, synthetic training data, and pipelines.

Drive 10X Efficiency With Custom LLM Architecture

Optimize proprietary reasoning models built on your private enterprise data.

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Why Growing Businesses Choose Our LLM Development Services?

Proprietary Model Weights

Retain 100% intellectual property ownership of your customized weights, training sets, and operational codebases.

Ultra-Low Latency Inference

Engineered with vLLM, TensorRT-LLM, and flash attention to deliver lightning-fast streaming generation speeds.

Zero Hallucination Tolerance

Deterministic system architectures backed by automated synthetic evaluations, ground-truth benchmarks, and RAG validation.

Top Benefits of Enterprise Custom LLMs

Air-Gapped Data Privacy

Process mission-critical internal data without relying on public cloud vendors or exposing sensitive customer PII.

Unmatched Accuracy

Trained and aligned directly on your specialized terminology, eliminating generic responses and boilerplate content.

Scalable Infrastructure

Scale workloads horizontally across GPU clusters with dynamic batching and autoscaling inference pipelines.

The 100% Proven Process For Every LLM We Train

From data curation and tokenizer calibration to fine-tuning, alignment, and deployment, we execute a scientific machine learning lifecycle.

01

Data Engineering & Curation

Data cleaning, deduplication, synthetic dataset generation, and formatting instruction-tuning datasets.

02

Base Architecture Selection

Benchmark and select the right foundation model (Llama 3, Mistral, Gemma, or Small Language Models) for your compute budget.

03

Supervised Fine-Tuning (SFT)

Execute parameter-efficient fine-tuning (LoRA/QLoRA) or full-weight adaptation on high-performance multi-GPU clusters.

04

Alignment & Direct Preference (DPO)

Apply RLHF or DPO techniques to align model outputs with enterprise tone, safety guardrails, and compliance standards.

05

Quantization & Inference Optimization

Optimize weights with AWQ/GPTQ and configure vLLM/TensorRT-LLM for sub-second response times.

06

Deployment, Monitoring & Eval

Deploy to private VPC or on-prem clusters with automated drift detection, hallucination monitoring, and red teaming.

Domain-Ready Engineers Across Every Industry

We train models on the complex linguistic and regulatory realities of your industry.

Healthcare and Biotech

HEALTHCARE & BIOTECH

Legal and Compliance

LEGAL & COMPLIANCE

Fintech and Banking

FINTECH & BANKING

Enterprise SaaS

ENTERPRISE SAAS

Pick The Model That Fits

PromptApps provides flexible engagement models tailored to your machine learning roadmap.

Staff Augmentation

Integrate senior PyTorch, CUDA, and NLP engineers directly into your existing machine learning sprints.

Dedicated LLM Squads

An end-to-end autonomous pod of ML researchers, MLOps leads, and data annotators building your custom models.

Fixed-Scope Milestones

Guaranteed timelines and fixed pricing for discrete deliverables like fine-tuning, RAG setup, or evaluation audits.

Engineered With Modern LLM Frameworks.

Extensive production experience across the cutting-edge deep learning and LLMOps stack.

View All Stacks →
Python Python
PyTorch PyTorch
TensorFlow Hugging Face
FastAPI vLLM Engine
Docker Docker
Kubernetes Kubernetes
AWS AWS Bedrock
pgvector pgvector
Redis Redis Vector
LangChain LangChain
LlamaIndex LlamaIndex
Triton Triton Server

Trained. Aligned. Deployed.

Proven enterprise results through custom LLM architectures.

Legal Contract Model

Specialized legal language model fine-tuned on 2M+ contract clauses with 98.4% extraction accuracy.

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Financial Model

High-security hybrid RAG engine parsing SEC filings with sub-second retrieval and zero token leakage.

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Healthcare Model

Air-gapped 70B healthcare model deployed on private hardware, cutting external API bills by 72%.

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Frequently Asked Questions

Everything you need to know about custom LLM development, fine-tuning, and deployment.

Public APIs (like GPT-4) expose your intellectual property, enforce rate limits, and have recurring token bills. Custom LLMs give you complete ownership of model weights, guarantee data privacy (air-gapped/on-premise), drastically reduce per-query inference costs, and understand your exact industry vocabulary without hallucinating.
Fine-Tuning teaches the model *how* to think, format, and reason in a specific style or domain. RAG (Retrieval-Augmented Generation) gives the model *external memory* to look up real-time facts from your internal documents. In most enterprise workflows, we deploy a hybrid architecture combining both for maximum accuracy.
With modern Parameter-Efficient Fine-Tuning (PEFT/LoRA), high-quality results can be achieved with as few as 1,000 to 5,000 expertly curated and cleaned instruction pairs. For full domain foundation adaptation, tens of millions of raw tokens are curated through our data engineering pipeline.
We work extensively with the Meta Llama family (Llama 3/3.1), Mistral/Mixtral architectures, Qwen, DeepSeek, and specialized Small Language Models (SLMs) such as Microsoft Phi-3 for resource-constrained edge deployments.
We implement multi-tiered guardrails including Direct Preference Optimization (DPO), NeMo Guardrails, semantic citation checking, strict temperature constraints, and automated benchmark evaluation pipelines to test for deterministic output.
With modern AWQ and FP8 quantization served via vLLM, a high-throughput 8B parameter model can run efficiently on a single consumer or enterprise GPU (such as an NVIDIA A10G/L4). Larger 70B models are clustered across multi-GPU setups (A100/H100) or managed via dedicated cloud instances.

Let's Discuss Your LLM Roadmap

Tell us about your proprietary data, use-case, or infrastructure requirements.

Click to upload or drag and drop dataset samples / architecture specs