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SiteFusion is a SaaS MVP development company for founders and B2B teams in the US, UK, EU, Canada, Australia, the UAE, Saudi Arabia and Qatar. An MVP is the smallest product that lets real customers do the one job you are selling, so you can learn whether they will pay and keep using it. You own the code and the accounts.
Founders get into trouble when the MVP turns into version two with a smaller budget. A feature earns its place in version one when it helps you learn whether customers will pay. Our custom SaaS guide covers how a product grows after that first version.
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If you sell to teams, each customer's data stays apart from the next. Deciding that early is much less work than changing it later.
The screens and logic for the one job the product does. A feature earns its place in version one when it helps you learn whether customers will pay.
Usually an admin and a regular user. Billing can start with a payment provider's hosted checkout. Your team needs a way to look up a customer without opening the database.
Things that can usually wait: a mobile app, a complex permission system, a public API, integrations beyond the one or two customers ask for first, and detailed reporting. Error tracking and basic analytics belong in version one, so you know when something breaks and whether people use the core feature.
Onboarding deserves more attention than it usually gets. A new user should reach the core task in the first session. We have written about cutting first-week churn with better onboarding.
The biggest cause of wildly different quotes is a vague brief. Two agencies reading "a platform for managing client projects" will picture different products. Write down who the users are, the one job they need done, the steps they take, and what is out of scope. Our MVP scope checklist walks through this, and how to write an MVP brief shows what to send. A good team will still push back on parts of the scope. If you are unsure you need custom software at all, the build vs buy guide helps you decide whether a tool you can buy gets you to the first customers.
MVP development for startups depends on the number of user roles, the integrations, and how quickly decisions get made on your side. What matters more than the total time is when you see working software. We build these products end to end, as described on the full-stack development page.
Who the users are, the one job they need done, the steps they take, and what is out of scope. Two teams reading a vague brief will picture two different products.
A mobile app, complex permissions, a public API, extra integrations and detailed reporting can usually wait. A team that agrees to every item in the first brief has skipped the question of what can wait.
You should be able to click through a deployed version early, then get updates every week or two. If the first thing you see is a finished product at the end, you lose the chance to change course while it is still small.
Watch whether people finish the core task, where they drop off, and what they ask for. Keep room for fixes and the changes early customers show you are needed.
The main cost drivers are the number of distinct user types, integrations (especially systems without a good API), data rules such as multi-tenancy, audit logs, data residency and compliance, AI features, and how custom the design is. AI features add build work and a running cost per request. See AI automation if that is the core of the product.
Running costs continue after launch: hosting, third-party services, AI usage and maintenance. Ask for an estimate of monthly costs alongside the build quote. Compare quotes against the same written brief.
The repository, hosting, domain and every paid service should be in your company's name. The dev partner contract checklist lists the clauses to look for.
Ask to see live products and, if you can, speak to a founder they have worked with. You can see shipped work on the portfolio. A team that has only shipped marketing sites is a weak signal for a SaaS product.
Ask how they test and deploy. Look for automated deployments, a staging environment and error tracking. At SiteFusion we mostly build with Next.js, React, Node.js and PostgreSQL. A common, well-documented stack makes it easier to hire someone else later if you need to.
A freelancer can work well for a small, well-defined MVP if you can manage the project and review the code yourself. An agency gives you design, frontend, backend and project management in one team. Hiring in-house makes sense once the product has traction and a steady roadmap. The guide to hiring a software development partner goes through that choice.
If the team is in another time zone, ask which hours they are online during your day and who your daily contact is. SiteFusion is based in Istanbul and delivers remotely for clients in the US, UK, EU, Canada, Australia and the Gulf.
Bugs, security updates and small changes continue once customers arrive. Ask who handles them. We describe that work on the post-launch support page, and the post-launch monitoring checklist covers what to watch so you hear about problems before customers do. If the product is software your own staff use, see internal tools development.
More of these are in dev partner red flags.
It is building the first usable version of a software-as-a-service product: enough for real customers to sign up, do the main job the product promises, and pay if you are charging. The aim is to learn from real use before you invest in the rest of the product.
It depends on the number of user types, the integrations, the data and compliance requirements, any AI features, and how much of the design is custom. Get quotes from at least two teams using the same written brief, and ask each one for an estimate of monthly running costs after launch as well as the build. Any precise price given before a team has understood the product is a guess.
A focused MVP with one core workflow is usually a matter of weeks to a few months. Integrations with older systems, compliance work and slow decisions are the usual reasons it takes longer. Ask for a working, deployed version early, with updates every week or two, so you can change course while the change is still small.
If you sell to companies, usually yes, or at least designed so it can become multi-tenant without a rewrite. Separating each customer's data from the start is much less work than changing it once you have paying customers.
You need someone you trust to review technical decisions. If you hire an agency, make sure you own the code and the accounts, get regular demos, and ask for documentation so another team could take over.
You watch whether people complete the core task, where they drop off, and what they ask for. Then you fix what breaks and decide what to build next from that evidence. Most products need ongoing support for security updates, bug fixes and small changes from the first week after launch.
If you are planning a SaaS MVP and want a second opinion on the scope, book a call. We will tell you what we would leave for a later version, and whether a tool you can buy could get you to the first customers sooner.