If you run a small company, you have three ways to get marketing done: hire an agency, build your own stack of tools and do it yourself, or use AI that does the work. Each has a price, and the number on the invoice is rarely the real one.
Hire an agency
A good agency is hard to beat: senior people who have run hundreds of campaigns, expertise across channels, an outside view of your brand, and someone accountable for results. For a business with the budget and the need, it is often the right call.
The trade is cost and fit. Startup retainers usually run $1,500 to $5,000 a month, small businesses pay $3,000 to $10,000, and full-service across several channels starts around $5,000 and can pass $15,000, with ad spend billed on top. Two things to plan for: a good agency needs a few weeks to learn your business, and the relationship still needs your time for reviews and feedback.
Build a DIY stack yourself
The tools are cheap, often free or a few hundred dollars a month. The catch is what they leave out: you. A typical SaaS company runs 15 to 25 separate marketing tools that do not talk to each other, so the person connecting them is you. And every tool starts at a blank screen. It writes whatever you ask, but it does not know what you should say or whether it is any good. The tools are cheap because they hand the hard part back to you.
There is a catch underneath the catch: most owners do not have the time this path assumes. The majority of small businesses get an hour or less a day for marketing, according to LocaliQ, while doing it yourself properly takes far more. The cheap option quietly bills you in the one resource you have least of: your time.
Use AI that does the work
This is newer, and different from a stack of tools. A tool helps you work faster; this kind of AI does the work. It starts with your market and brand, writes in your voice, checks its own output before anything ships, and publishes on a schedule, in one product with one memory of your brand. The cost sits at software prices, far below a retainer. The honest limits: it is a young category, it does not yet cover every channel an agency touches, and you still approve the work before it goes out. Lightr is built for this path. It does the marketing, starting at strategy and scoring every piece before you publish. It asks for no marketing expertise, and it keeps you at the center of the decisions.
The cost nobody puts on the invoice
Every option is really about judgment. AI made content almost free to produce, yet good marketing got more valuable, not cheaper. When anyone can produce endless content, the rare thing is knowing what is worth saying and whether it is any good. That judgment is exactly what a strong agency has always sold, and what any AI worth using has to provide. So the real question is not “which is cheapest?” but “where do I get judgment I can trust, at a price and in a form that fit my business?”
A worked example: six months, three paths
Say you are a solo founder who wants steady organic marketing, social posts plus a newsletter, for six months. Ballpark estimates, not quotes, and all of them exclude advertising spend, which is a separate cost on every path.
| Path | Cash (6 mo) | Your time | Your time priced at $100/hr | All-in (cash + your time) |
|---|---|---|---|---|
| Agency | ~$30,000 ($5,000/mo) | ~2–3 hrs/week, ~65 hrs | ~$6,500 | ~$36,500 |
| DIY stack | ~$900 (5–6 tools, ~$150/mo) | ~10 hrs/week, ~260 hrs | ~$26,000 | ~$26,900 |
| AI that does the work | ~$800 ($129/mo, top tier) | ~1–2 hrs/week, ~40 hrs | ~$4,000 | ~$4,800 |
By cash alone, DIY wins. Add your time and it flips: about 260 hours over six months is roughly $26,000 of your own work on top of the tool fees, which makes the “cheap” option the most expensive in real terms. The agency turns money into time. The AI path aims at that same time saving for a fraction of the cash, with the honest trade that the category is younger and you stay in the approval seat.
The money you save can also go to work. Choosing the AI path over an agency frees roughly $29,000 over six months, close to $4,800 a month, that you could put straight into targeted advertising instead of overhead.
How to choose
Choose by what you are short on. Have the budget and want experienced people to own it end to end? An agency is a strong choice. Have time and enjoy the craft? The DIY stack is yours. Have neither a big budget nor the time to become a marketer? The third path is built for you. They also combine: many businesses use an agency for strategy and AI for day-to-day volume, and a growing number of agencies use AI themselves to serve more clients without hiring.
Most founders need the same thing in the end: the marketing done, well, in their voice, without making it their second job. For a long time there was no good option there. Now there is.
Cost figures are 2026 industry ranges from ClicksGeek and InfluenceFlow (agency retainers) and The Digital Bloom and MarTech (martech tool counts). Time-spent figure from the LocaliQ Small Business Marketing Trends Report 2025. Ranges vary by industry, scope, and region.