The suppliers in this market describe themselves in a dozen ways that mean roughly the same thing, which makes comparison hard until you force every proposal onto the same axes. Once you do, most apparent price differences turn out to be scope differences and the shortlist sorts itself.
Force every custom software development business onto the same six axes
Which platforms. Whether a backend exists or must be built. How many user roles and what each can see. Which external systems are integrated and who owns credentials. Whether designs are provided or produced. And what is explicitly out of scope. Proposals answering those six become comparable and usually stop resembling one another, which is the point. Ask for the exclusions list in writing, because it is the real proposal.
A startup development company and professional services software development are different shapes of supplier
A small business wanting one system that runs its operation needs a supplier that will still exist and answer the phone in five years, which argues for stability over brilliance. A startup needs speed and a willingness to build something deliberately incomplete. A professional services firm usually needs integration with existing systems and careful handling of client data. These are different suppliers, and a firm that claims all three equally is describing a sales page.
With custom business software development, ask what it costs to own every year
Custom software is a permanent commitment: dependency and security updates, platform and browser changes, hosting and the engineering time to keep it current. Require an annual figure in the original proposal. A supplier that cannot produce one has not operated a system past its first year, and the omission usually means the quote is priced to reach launch rather than to have something that keeps working.
Buy the ability to leave any of the IT development companies you hire
Repository, pipeline, hosting and accounts in your name with the supplier granted access. Architecture documentation in your repository rather than their wiki. An express written copyright assignment, since under 17 USC 101 commissioned software is not automatically a work made for hire. Together these turn changing supplier into a quarter of work rather than a rebuild, and they are the only leverage you have at renewal.
Questions people ask about custom software companies
How do we compare custom software companies?
Force every proposal onto the same six axes: platforms, whether the backend exists, roles and visibility, integrations and credential ownership, who produces designs, and what is explicitly out of scope. Most price differences are scope differences.
Does the size of a business software development company matter?
Its shape does. A small business wanting a system that runs its operation should weight stability and longevity; a startup should weight speed and willingness to build something deliberately incomplete. A firm claiming both equally is describing a sales page.
What should we insist on owning?
Repository, pipeline, hosting and accounts in your name, architecture documentation in your repository, and an express copyright assignment. Those turn a supplier change into a quarter of work rather than a rebuild.