An LLM agent is a large language model given tools, memory, and a goal — so instead of just answering, it plans, acts, checks its results, and repeats until the job is done. It's the difference between a model that talks and a model that does. Here is what an LLM agent is, how the loop works, what it can and can't do, and why it matters for founders.

Most founders build an email list and then let it go stale, because running a real email program is a full-time job disguised as a side task. The sending is easy; the segmentation, timing, and testing that make it work are what quietly fall apart. Here is how an AI agent turns email marketing from an occasional broadcast into a system that runs itself.

An autonomous agent is software that pursues a goal on its own — deciding what steps to take, using tools, and adapting as it goes, without a human directing each move. Unlike a chatbot that answers one prompt at a time, an agent keeps working until the job is done. They are the building block behind the current wave of AI that runs real work.

An AI SDR is an AI agent that does the work of a sales development rep — finding prospects, researching them, and starting personalized conversations to book meetings — without a human running each step. It automates the top of the sales funnel, the most repetitive and time-consuming part of growth. For founders, it means outbound that runs continuously without a sales hire.

A digital worker is software that owns a role and completes real jobs end to end — not a script you trigger, but an AI agent that decides, acts, and reports back like a teammate. For founders, digital workers are becoming the fastest way to get a function running without adding headcount. Here is what they are, how they differ from bots and RPA, and where they fit in a company.