The Capacity Problem
At some point, you'll have more client work than hours. The options are: turn down work (lose revenue), work unsustainable hours (burn out), or hire. Most new agencies aren't ready to hire full-time employees, which makes subcontractors the practical answer.
Where to Find AI Subcontractors
Upwork: Largest pool, variable quality. Use it to find specialists for narrow tasks (Python developer to build a specific integration, ML engineer for a model fine-tuning project). Vet them hard — request sample work and pay for a small test project first.
Toptal: Pre-vetted talent, premium pricing. Use when you need reliability and can't afford a bad hire on a client project.
LinkedIn: Good for finding former agency employees who now freelance. Search for "AI developer freelance" or "chatbot developer independent."
AI-specific communities: The AI Breakfast community, AI tool-specific Discord servers (Voiceflow has a large contractor community, for example), and niche Slack groups often have developers looking for project work.
Structuring Subcontractor Relationships
Keep 30-40% margin on subcontractor work minimum. If you're paying a developer $150/hour and billing the client $150/hour, you're making nothing for the project management, client communication, and risk you're absorbing.
Use written subcontractor agreements that cover: IP ownership (yours, not theirs), confidentiality (client names and project details), non-solicitation (can't poach your clients), and payment terms.
Building a Reliable Bench
The goal is a small group of trusted subcontractors you can call on repeatedly rather than recruiting from scratch each project. Treat good subcontractors well — pay promptly, give clear briefs, and bring them back. Agency work is relationship-driven at every level.