AI stacks let agencies scale

A new crop of solo founders is turning artificial intelligence toolchains into agencies, selling search engine optimization and phone-answering services that once needed teams. (anthropic.com) One pitch making the rounds shows Anthropic’s Claude Code packaged as a search engine optimization workflow that can run “multiple parallel tasks,” edit files, and use command-line tools from a terminal or integrated development environment. Anthropic lists Claude Code in its Pro plan at $20 a month, with higher-use Max plans at $100 and $200. (anthropic.com) Another pitch centers on voice agents that answer inbound calls, follow up with leads by email, text message, or voice, and plug into a customer relationship management system. Stacked Media says its “AI powered sales engine” offers 24/7 phone answering and says the firm has managed more than $22 million in media. (stackedmedia.com) The mechanics are simple: one layer generates or analyzes content, another connects to software tools, and a third handles delivery over the web, text, or phone. Anthropic says Claude Code can work inside a codebase, run commands, and manage parallel tasks; OpenAI says its Realtime Application Programming Interface is built for “natural-sounding voice agents.” (anthropic.com) (openai.com) That setup has gotten cheaper in 2026. OpenAI lists audio pricing for its GPT-realtime-1.5 model at $32 per 1 million input audio tokens and $64 per 1 million output audio tokens, while Anthropic sells Claude Code access inside fixed monthly plans instead of custom agency software budgets. (openai.com) (anthropic.com) The agency wrapper matters because clients usually buy outcomes, not models. A local business may not want to assemble a speech model, a scheduling flow, a customer relationship management sync, and ad reporting; it may pay for booked calls or ranked pages instead. (stackedmedia.com) (openai.com) The platform companies are also pushing in the same direction. Anthropic launched Claude Managed Agents in public beta on April 8, 2026, with secure sandboxing and built-in tools, and OpenAI says Frontier is designed to help companies build and manage agents with shared context and permissions. (platform.claude.com) (openai.com) That does not mean the service is fully automated. Anthropic says Claude Code usage limits apply, and search engine optimization operators using Claude-based stacks still describe strategy, interpretation, and checking outputs as necessary parts of the workflow. (anthropic.com) (tripledart.com) Agency claims on social platforms can also outrun what public evidence shows. Stacked Media’s site describes phone answering, lead follow-up, and media buying, but it does not publish a standard monthly retainer card on the pages available publicly. (stackedmedia.com) What is changing is the minimum team size needed to sell agency work. When coding agents can run tasks in parallel and voice models can handle live calls, one operator can package a stack, put a price on it, and call it an agency. (anthropic.com) (openai.com)