An agency fits when the open questions are bigger than code. Suppose that startup later raises a round, changes its positioning and outgrows its first site. Now somebody has to decide what the pages say, design them, build the theme and move the old content. Those jobs depend on each other, and an agency's value is that one team coordinates them.
Lean Labs publishes a scope for that kind of project. Its article on the three stages of growth-driven design describes a launchpad site covering the three to eight pages closest to the buyer's decision, with the remaining pages built afterward. It prices the launchpad, strategy and build together, at $30,000 to $70,000 or more over 9 to 13 weeks. The design step is a four-week Design Blueprint at $6,000 to $12,000. Ask whether the blueprint fee is counted inside the build range.
If your message is the main thing to fix and the site can launch with a handful of pages, that is the kind of project the article describes. The same article advises talking with customers, sales reps and support staff during the strategy stage. Whoever runs that research will need your help reaching those people. We describe the format in what a launchpad website is and the startup case in what growth-driven design means for startups.
Some projects are wider than a website. SmartBug Media describes marketing, sales, revenue operations and web services. Its web work includes moving content to HubSpot, WordPress or Shopify, along with design and development, integrations and maintenance. A startup that is moving its CRM and connecting other systems in the same project has a reason to talk to a firm that offers that range. Ask it for a price and a timeline for your scope. With either firm, the published description shows what it offers, so ask to see a comparable project it has delivered. We set three firms side by side in SmartBug, New Breed, or Lean Labs for a HubSpot website.
An agency can also keep working after launch. Lean Labs' article on HubSpot agency partners for startups describes help with pages, campaign assets, reporting and automation. Whether a startup needs that depends on whether it has people to do those jobs.