A corporate site has several audiences at once, customers, recruits, press, investors, partners, and the common failure is a site organised around the company's internal structure rather than around what any of those people came to find. Design quality is largely a matter of that organisation rather than of appearance.
Ask a creative web design agency to structure around the visitor, not the org chart
Navigation that mirrors your departments is convenient for you and useless to a visitor who wants to know whether you solve their problem and whether you are credible. Ask a prospective agency how it decides information architecture and whether that involves talking to actual customers. An agency that begins with a site map derived from your existing structure is reproducing the problem you are paying to fix.
Professional services web design: the site has to carry the credibility
For firms selling expertise, the site's job is to make a stranger believe that specific people can solve their specific problem. That means named people with real depth, work that describes the problem and the outcome rather than listing logos, and writing that demonstrates thinking rather than asserting it. A beautifully designed site full of generic claims converts worse than a plain one carrying evidence, which is the opposite of what most design proposals imply.
Read a web design solutions proposal for what is excluded
Packaged proposals compete on an apparently comparable price, and the differences are in the exclusions: how many templates, who writes content, how many revision rounds, whether migration of existing content is included, whether the content management system lets you add pages without the agency, and what happens after launch. Ask every bidder for the exclusions list explicitly. That document, rather than the price, is the proposal.
Set measurable requirements in the contract with a responsive website design company
Performance and accessibility are testable, so make them acceptance criteria rather than aspirations. Google publishes the page experience signals: good Core Web Vitals, HTTPS, proper mobile display and no intrusive interstitials, measurable on any live URL. Name a conformance level from the W3C's Web Content Accessibility Guidelines and require evidence. For a corporate site in particular, accessibility is also a procurement and reputational exposure rather than only a courtesy.
Questions people ask about corporate web design
What makes a corporate site work?
Organisation around what visitors came to find rather than around your internal structure, and evidence rather than claims. An agency that starts from your existing site map is reproducing the problem you are paying to fix.
How do we compare one web design package with another?
By their exclusions: template count, who writes content, revision rounds, content migration, whether you can add pages yourself, and what happens after launch. Ask every bidder for that list explicitly.
What should be contractual rather than aspirational?
Performance and accessibility. Both are measurable on a live URL, so set named targets using the published page experience signals and a WCAG conformance level, and make acceptance depend on evidence.