How to Choose a Marketing Agency for Your Startup
Hiring a marketing or dev agency? Here is how to shortlist, brief, vet and contract one, with red flags and the questions that expose a weak pitch.
To choose a marketing or development agency, write a one-page brief first, shortlist three firms that have solved your exact problem, and pick the one whose proposal argues with your brief in a useful way. Then sign a contract you own: your accounts, your data, a clear exit. That order matters more than any award badge.
Most bad agency relationships are decided before the first call. The brief was vague, the budget was hidden, or nobody defined what "working" means.
Do you actually need an agency?
Not always. An agency makes sense when you need a skill you will use in bursts (a rebrand, a launch site, a paid campaign setup) or when hiring would take longer than the problem allows.
Skip it when you don't yet know who your customer is. An agency can execute a channel, but it can't invent your positioning for you at a retainer price. If you are pre-product-market fit, a freelancer on a short, fixed scope is usually cheaper and safer.
How do you write an agency brief?
One page is enough. Include:
- The goal in one sentence. "Get 40 qualified demo requests a month from search" beats "grow awareness".
- What you have. Current traffic, stack, past experiments, anything that already failed.
- Budget range. Hiding it only wastes both sides' time. Give a range and ask what they would do at the low and high end.
- Constraints. Deadlines, tools you must keep, compliance issues.
- How you will judge success. Pick two or three numbers you can measure on your side, not only in their reports.
Send the same brief to every candidate. It makes proposals comparable.
How do you shortlist agencies?
Start with people who have solved your problem for a company like yours. Ask founders in your network, check who ships work you admire, and look at the partner programs of the tools you already use. Software vendors often keep partner listings, for example HubSpot's solutions partner program, where tiers and requirements are published by the vendor itself. Treat a tier as a starting filter, not a verdict. We cover how those programs are changing in our analysis of the 2026 HubSpot partner rules.
Browse the Agencies, Studios & Services hub if you want a wider pool, then cut it down to three.
What to ask on the first call
- Who exactly will work on my account, and how many other accounts do they handle?
- Show me two projects with a similar budget and what you would do differently now.
- Which numbers did the client track, and which did you report?
- What do you need from us in the first 30 days?
- What would make you tell us to stop spending?
The last question is the tell. A good agency has an answer. A weak one changes the subject.
What are the red flags?
- Guaranteed results. Nobody can promise rankings, traffic or revenue. Walk away.
- Case studies with no baseline. "Grew 300%" from what, over what period?
- A senior pitch and a junior team. Ask to meet the people doing the work.
- Reports full of activity. Posts published and keywords tracked are inputs, not outcomes.
- Pressure to sign this week. Real scarcity is rare.
- Refusal to let you own the accounts. Ad accounts, analytics, domains and repos should be created in your name.
What should the contract say?
You are not a lawyer and this is not legal advice, so have one read it. But look for these terms before you sign:
| Term | What to want |
|---|---|
| Scope | Deliverables listed, not "ongoing support" |
| Ownership | You own accounts, code, content and data from day one |
| Access | Admin rights for you on every platform |
| Term and exit | Short initial period, 30 days' notice, handover of assets |
| Pricing | Fees separated from ad spend, with approval needed above a set amount |
| Reporting | Monthly, tied to the success numbers from your brief |
| Subcontractors | Disclosed in advance |
Start with a paid pilot of 6 to 12 weeks instead of a 12-month retainer. If the pilot goes well, extend. If not, you have lost weeks, not a year.
How do you manage the agency after signing?
Set a weekly 30-minute call for the first month, then move to every two weeks. Keep one internal owner who answers within a day, because slow feedback is the most common reason projects slip. Review the numbers from your own analytics, not only the agency's deck.
If you are weighing channels at the same time, look at free options too: a product directory listing on Discover or relevant placements through Outreach cost far less than a retainer and can validate demand before you hire anyone.
FAQ
How much should a startup spend on an agency?
There is no fair universal number. Set the budget from the goal: what is one customer worth, and how many do you need? Then ask candidates what they would do at three budget levels.
Should I hire an agency or a freelancer?
Hire a freelancer for a narrow, well-defined task. Hire an agency when you need several skills coordinated, such as design, development and analytics, and you don't have a manager for them.
How long before I see results?
It depends on the channel. Paid campaigns can show signals within weeks, while search work usually takes months. Ask for leading indicators in the pilot, and don't accept promises about timing.
Can I switch agencies without losing everything?
Yes, if you own the accounts, code and content from the start. That is the strongest argument for putting ownership in the contract.
Your next step: write the one-page brief today and send it to three firms before you look at a single portfolio.
