Marketing for small businesses, done by an AI CMO

cmo.so is made by AI Marketing OS Ltd, a company registered in England and Wales (company number 16687354), trading as CMO.so. It was incorporated on 1 September 2025 and is based in Tonbridge, Kent.

The same company runs the cmo.so app, Maggie, the MCP server and CLI, and the free marketing skills library.

cmo.so is the AI Marketing OS for small businesses. Its AI CMO, Maggie, researches your business, plans your marketing, writes every blog and social post, makes the pictures and publishes them once you approve.

It brings your website, your social channels and your results together in one place, so the marketing gets done every week without a team or an agency.

Maggie is cmo.so's AI marketing assistant, our AI CMO. She builds a brand profile from your website, picks the right post template, voice and look for each channel, and writes in your style.

She isn't a person. When you'd rather talk to one, the cmo.so team is a message away from the contact page.

Small businesses that need steady marketing but don't have the time or budget for a marketing team: local services, online shops, clinics and spas, professional firms, startups and founders.

Agencies use it too, running many client websites from one account, each with its own brand profile, approvals and plan.

Yes. By default nothing goes out until you approve it. For each channel you choose whether to approve every post yourself or let Maggie post on autopilot, and any channel can be paused at any time.

Optional Content Policy Guard checks posts against your industry's rules or your own and holds anything doubtful as a draft with a suggested rewrite.

Everything already published stays on your own website and social accounts. Leaving cmo.so doesn't take any of it down.

If you delete your account, your sign-in, connections, drafts and Maggie's memory are removed, and paid plans stop renewing at the end of the period you've paid for.

We never sell or rent your data. Social channels connect through each platform's official sign-in, so cmo.so never sees your passwords, and you can disconnect at any time.

Search Console data is used only to show your own results and plan your content, never for advertising or to train AI models, and videos you post are deleted within 7 days. The privacy policy has the details.

In the cmo.so app on iPhone (beta) and on the web at app.cmo.so, inside ChatGPT and Claude, and in Cursor, VS Code or the terminal through the cmo.so MCP server and CLI.

The same Maggie, memory and approvals apply everywhere, so you can start something in one place and finish it in another.

We believe good marketing methods should be open. The skills library is over 130 step-by-step playbooks under the MIT licence, for SEO, AI search, content, social, email, ads and more.

Anyone can use them with Claude, ChatGPT, Codex, Cursor or any agent that reads SKILL.md, whether or not they use cmo.so.

cmo.so is this website: what cmo.so does, pricing, guides, the skills library and your plans and billing. app.cmo.so is the web version of the cmo.so app, where you and Maggie run your marketing day to day.

ai.cmo.so is the dashboard, still used for a few settings such as Google Ads and agency options. One cmo.so account signs you in to all of them.

You can start free, with no card needed. Paid plans are per website and billed monthly; the pricing page lists each plan with its posts a day and Maggie messages.

If you cancel a paid plan, it carries on until the end of the month you've paid for.

The contact page has Ask Maggie for quick answers and a form that sends your question to the team, who reply by email. You can also email maggie@cmo.so.

For privacy and data requests, use support@cmo.so, as our privacy policy says.