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Custom GPTs — Build AI Assistants for Your Business

Custom GPTs

Your Business Deserves Its Own AI

Generic AI gives generic answers. Last Rev builds custom GPTs trained on your data, your processes, and your domain expertise — so every response is relevant, accurate, and useful.

50+
Custom GPTs Built
90%+
Response Accuracy
2 Weeks
Average Delivery
Use Cases

Custom GPTs for Every Department

A custom GPT is not just a chatbot — it is a specialized AI assistant that knows your business, follows your processes, and integrates with your tools.

Sales

Sales Assistant GPT

Knows your product catalog, pricing, competitive positioning, and ideal customer profile. Helps reps prepare for calls, draft proposals, and answer prospect questions instantly.

Support

Support Agent GPT

Trained on your knowledge base, product docs, and historical tickets. Handles tier-1 support autonomously and provides agents with instant answer suggestions.

HR

Onboarding GPT

Guides new employees through company policies, tools, processes, and culture. Answers questions 24/7 and reduces the burden on HR and managers.

Marketing

Content Writer GPT

Trained on your brand voice, style guide, and content library. Generates blog drafts, social posts, email copy, and product descriptions that sound like your brand.

Analytics

Data Analyst GPT

Connects to your databases and reporting tools. Answer natural language questions about your data — revenue trends, customer metrics, operational KPIs — without writing SQL.

Legal

Legal & Compliance GPT

Trained on your contracts, policies, and regulatory requirements. Reviews documents, flags compliance issues, and answers policy questions instantly.

Features

What Makes Our Custom GPTs Different

Trained on Your Data
We ingest your docs, wikis, knowledge bases, product info, and historical data to build a GPT that truly understands your business.
Tool Integration
Your GPT connects to CRM, helpdesk, databases, APIs, and internal tools. It does not just answer questions — it takes action.
Guardrails & Safety
Built-in guardrails prevent hallucination, off-topic responses, and data leakage. Confidence thresholds ensure the GPT escalates when it is not sure.
Brand Voice Control
Every response matches your brand tone, terminology, and communication style. The GPT sounds like your company, not like a generic AI.
Multi-Channel Deployment
Deploy via ChatGPT, your website, Slack, Microsoft Teams, or a custom interface. One GPT, accessible everywhere your team works.
Analytics & Improvement
Track usage, accuracy, user satisfaction, and common queries. Use insights to continuously improve performance and expand coverage.
When to Use What

Custom GPTs vs. Full AI Agent Development

Custom GPTs are the fastest way to deploy a specialized AI assistant. For more complex needs, we build full AI agents with deeper integration and autonomous capabilities.

Fast Start

Custom GPTs

Best for: knowledge-based Q&A, content generation, internal assistants, and simple workflows. Deployed in 1-3 weeks with lower cost and immediate value.

Full Power

AI Agents

Best for: complex multi-step workflows, deep system integration, autonomous decision-making, and production-scale automation. Built for maximum capability and control.

How It Works

From Idea to Custom GPT in Weeks

Define the Use Case
We identify the specific problem your GPT will solve, the users it will serve, and the data and tools it needs access to.
Gather & Prepare Data
We collect and prepare your knowledge base, documentation, and training examples. Data quality determines GPT quality.
Build & Fine-Tune
We build the custom GPT, configure its behavior, train it on your data, and test it against real-world scenarios until accuracy meets your standards.
Deploy & Iterate
Go live with monitoring and feedback loops. We track performance, collect user feedback, and continuously improve accuracy and coverage.
FAQ

Custom GPT Questions

What is the difference between a custom GPT and ChatGPT?
ChatGPT is a general-purpose AI trained on public internet data. A custom GPT is a specialized assistant trained on your specific business data, configured with your brand voice, and connected to your tools. It gives answers that are relevant to your business — not generic internet knowledge.
Is our data secure?
Yes. We implement enterprise-grade security including data encryption, access controls, and audit logging. Your training data can be stored in your own infrastructure. We support OpenAI Enterprise, Azure OpenAI, and private model deployments for maximum data security.
How much does a custom GPT cost?
Custom GPT projects typically range from $5,000 to $25,000 depending on complexity, data preparation requirements, integrations, and deployment channels. We scope every project individually and provide a fixed quote before starting.
Can we update the GPT ourselves?
Yes. We build GPTs with update workflows so your team can add new knowledge, update responses, and refine behavior without engineering support. We also offer managed update services if you prefer.
How accurate are custom GPTs?
Custom GPTs trained on quality data typically achieve 90%+ accuracy for domain-specific questions. We implement confidence thresholds, source citation, and human escalation paths to handle edge cases gracefully.
Can a custom GPT replace our FAQ page?
It can do much more than that. A custom GPT handles natural language questions, follow-up questions, and multi-turn conversations — something a static FAQ page cannot do. Many clients keep their FAQ page for SEO and use the GPT for interactive support.

Ready to Build Your Custom GPT?

Tell us about your use case and we will scope a custom GPT that fits your business, your data, and your budget.

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