Configure everything. Inherit nothing.
A blank-canvas AI agent with no opinions pre-installed. Bring your own Anthropic, OpenAI, Gemini, or Cursor key, edit the workspace files directly, and wire it up exactly how you'd want it. We run the server. Every other decision is yours.
£79/month · BYOK required · Self-serve from day one
Who it's for
Custom Agent is for developers, agencies, and technically confident operators who know what they want from an AI agent — and don't want someone else's defaults getting in the way. If you've looked at template-based agents and thought “I'd just undo all of this,” this is the plan. BYOK is required; we assume you know your way around an API key.
Everything you need. Nothing you didn't ask for.
Your API keys, your cost
Connect Anthropic, OpenAI, Gemini, or Cursor directly. You pay providers at cost — no markup, no middleman taking a cut of your AI spend.
File-level control
Edit AGENTS.md, SOUL.md, and MEMORY.md directly. If it defines how the agent thinks, remembers, or behaves, you can change it.
No template to fight
Blank canvas from day one. Define the persona, the rules, and the memory yourself — or don't. Nothing is pre-decided.
Full integrations, no restrictions
CRM, calendar, messaging channels — the same integration stack available across every plan, with nothing locked away.
Infrastructure managed. Hands off yours.
Uptime, hosting, server ops — handled. You never think about the machine running it.
Self-serve by design
If you configured it, you can change it. No support queue, no dependency on us to make a tweak.
Custom Agent
£79
/month
- ✓Hosting & managed infrastructure
- ✓Full integration stack
- ✓Workspace file access (AGENTS.md, SOUL.md, MEMORY.md)
- ✓Bring your own API key (Anthropic, OpenAI, Gemini, or Cursor)
- ✓Self-serve configuration — no support ticket needed
You supply the API key; we run everything else.
Take control →The only plan of its kind at this price.
Voiceflow's BYOK is enterprise-only. Botpress charges $150/mo and still doesn't let you bring your own keys. At £79/mo, Custom Agent is the only platform offering BYOK + blank canvas + self-serve + file-based configuration.