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SaaS development services: from MVP to paid product

Ronas IT handles SaaS product development end to end, from the first MVP to a product customers pay for: web and mobile clients, a backend with tenants, roles and billing, and an admin panel. Our engineers build with AI agents at every stage, so you see a working build sooner. They review and accept every change the agents make.

SaaS we build

These are examples from our projects for businesses and their teams, on web, iOS and Android.

B2B workflow platforms

Each customer organization gets its own members, roles and workflows with stages, tasks, notes and attachments, so the whole team runs its process in one product.

Team collaboration tools

Projects, tasks and comments, with Kanban, List and Timeline views, for teams that work together on web and mobile.

Subscription data products

Paid access to data and reports on monthly or annual plans, with add-ons such as a paid concierge service sold next to the plan.

Partner platforms

One core platform with a separate instance for each B2B partner, so every partner gets its own catalog, prices and users.

Lead-generation tools

Lead-generation products connected to each customer's marketing CRM, with a free plan and paid plans that add more features.

Utility billing platforms

Meter data becomes charges for each building occupant. Each billing run lists fees and sales tax as separate lines and is reviewed before the bills go out as PDF or Excel files.

Mobile apps for an existing SaaS

A new iOS and Android app for a SaaS you already run, with sign-in through your identity server, so users keep the account they have.

And more

We also build other SaaS products, with the same tenants, roles and billing described below.

What we handle in your SaaS: tenancy, access and billing

Customers pay for a SaaS product only when their data stays separate, each person has the right access and billing runs without manual fixes. We build and support each of these parts, so you do not need separate specialists for data isolation, access or billing.

A woman at a laptop runs a SaaS product split into three locked customer workspaces, each linked to a plan card, with a payment card beside the plans.
A woman at a laptop runs a SaaS product split into three locked customer workspaces, each linked to a plan card, with a payment card beside the plans.

Tenancy and data isolation

Every SaaS product needs tenant isolation, so we keep each customer's data separate. Users belong to an organization, and their role there decides what they can see and change. A partner that needs its own environment gets a separate instance. On the staging build you can check this yourself: open the same screens with accounts from two different customers.

Plans and billing

We connect web billing to Stripe, Paddle or Chargebee: the provider takes the payments, and your code holds the plans, limits and what each plan unlocks. On Stripe, customers subscribe in Checkout and manage plans in the Customer Portal. After a failed invoice payment, webhooks mark the account past due without a manual check. Mobile apps bill subscriptions, trials and promo codes through App Store and Google Play.

Trials and onboarding

We set up the trial model you choose: trial users get paid features until the trial ends, or selected paid sections stay locked with an upgrade button. Admins invite their team, and built-in guidance takes a new user from sign-up to the dashboard.

Roles and sign-in

We set up roles such as Admin, User and Read-only, which decide who can edit and who can only view. Users sign in with email, Google or Apple, or keep the login they already use: your company's identity server over OAuth, or SAML SSO through Okta or Microsoft Entra ID.

Audit logs and activity history

We record changes to business records with who made them and what changed, separately for each organization or, where a partner has its own instance, for that instance. Your support team can review the history and revert a change when a customer asks.

Real-time updates

We deliver task changes, comments and attachments to every user in the same organization who has access, without a refresh, on web and mobile.

Usage limits and quotas

We enforce free-plan caps on projects or storage, per-user storage quotas and credit balances. At the limit, the user sees a clear message and a prompt to upgrade, so they do not have to ask support why an action is blocked.

Admin panels and back office

We give your staff one admin panel to manage users, roles and plan status without a developer: the one your product already has, Laravel Backpack, or a custom panel in React or Next.js. Each customer's admins get their own controls inside the product.

Analytics and reporting

We build dashboards and reports for your customers inside the product. Your team sees which features customers use in Mixpanel, PostHog or Firebase Analytics, and gets business reporting in Metabase.

From MVP to a paid SaaS product

Our engineers set up the pipeline AI agents work in, give them tasks and check every result before it reaches you. Each sprint, usually one to three weeks long, ends with a working build or designs you can open.

  • 1

    Discovery and design

    Our engineers use AI agents to check your requirements for gaps and compare architecture options, then propose the architecture and agree the scope and estimate with you. You can order this analysis as a separate stage and keep its user stories, flow maps, architecture and estimate, whether you build with us or with another team. Our designers build clickable prototypes and a design system for you to approve, so later features need no interface rebuild.

  • 2

    MVP release

    The first release covers the core workflow and can run as our MVP development service, so you can test the market before you build full billing. Our engineers write the code with AI agents, review every pull request and run autotests and QA agents on each commit. You accept each milestone on a staging build.

  • 3

    Pilot with early users

    We open the product to a cohort of pilot users and hold a checkpoint before the wider rollout, so problems show up with a small group first. Our engineers use AI agents to sort the errors pilot users run into, check each bug report and suggest what to fix first. Our project manager suggests features for the paid plans based on what pilot users do and ask for. The priorities and the final choice are yours.

  • 4

    Plan tiers and billing

    We add the pricing model you choose: a free plan with limits, paid subscriptions, trials, and a top tier with SAML SSO and audit logs when enterprise customers need them. Our engineers write end-to-end tests for plan limits and payments with AI agents and check every database migration. They accept every change before it reaches production.

  • 5

    Scale and support

    After launch, the product grows in scoped phases or with a dedicated team, and we keep supporting it in production. Our engineers use AI agents to sort logs, alerts and Sentry errors, so they see problems without waiting for customer reports. They prepare dependency updates with the agents, check each update before it ships and agree priorities with you. You can start with us at any stage above, from discovery to support, whether you have an idea, an MVP or a launched product.

SaaS development cost

A SaaS product starts at $20,000 for one client platform and takes at least 8 weeks. It is priced as Complex product development: a product beyond an MVP with complex business logic, high load and real-time features. The final price depends on the number of user roles, third-party integrations, and payment or compliance requirements.

  • The price covers one client platform: a web app, a cross-platform app for iOS and Android, or a native iOS or Android app

  • Each extra client platform costs from 50% of the first one

  • Included: design, project management, testing, and the backend, integrations and admin panel your product needs

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SaaS development case studies

Examples of our SaaS work, with their scope and timeline.

Project management SaaS

We designed and built a real-time project management app for a European SaaS company: React web and React Native mobile apps with a Free, Team and Business plan model. Pilot users got early access, and over 100 teams were onboarded within the first three months of launch. Timeline 7 months, cost $130,000 +.

View case
Project management app on a tablet showing a design task with status fields and a team comments thread.
Project management app on a tablet showing a design task with status fields and a team comments thread.

Membership web app

We designed and built a mobile-first web app for UK Retreats with subscription access to holiday stays: free, £1.50 and £3.00 monthly plans on Stripe, a map of stays and an admin panel for new listings. The MVP was ready within 3 months.

View case
Holiday rental booking app on two phones showing a cottage listing and a map of available properties.
Holiday rental booking app on two phones showing a cottage listing and a map of available properties.

SaaS tech stack

We pick the stack for each product from the technologies our teams use every day, so your project starts on tools we know well.

Web and mobile apps

Next.js or React for the web app and React Native for iOS and Android, so one team covers web and mobile. Redux Toolkit with RTK Query handles state and API data.

Backend and API

Laravel for most backends, Node.js with NestJS for real-time products, and Python for data and AI-heavy services. Plans, permissions and business logic live in the API, so web and mobile apps follow the same rules.

Data and real-time

PostgreSQL stores accounts and records. Real-time updates run on Laravel Reverb in Laravel products, or on WebSockets with Redis pub/sub.

Cloud and monitoring

Docker on AWS or another cloud, with Kubernetes or Docker Swarm and a managed database such as Amazon RDS. Sentry reports production errors to our engineers.

Talk to our CEO

Roman Surikov, CEO at Ronas IT

Roman Surikov

CEO, Ronas IT

Roman Surikov worked as a software developer before he founded Ronas IT. He is an engineer, so on a call with him you can discuss your product's architecture and technical constraints right away.

Before a SaaS build starts, I ask the founder who pays, for what, and how often. The answer shapes the plans, the billing and the first release more than the feature list does.

I started as a developer, so I also look at what the product will cost to run and to change. If plans and billing can wait until the pilot shows what customers pay for, we leave them out of the first release.

Services related to SaaS development

MVP development

A first release that tests your SaaS idea.

MVP development services

Web apps

Custom web apps for business workflows.

Web app services

UI/UX design

Product design and design systems for your app.

UI/UX design services

SaaS FAQ

How much does SaaS development cost?

A SaaS product starts at $20,000 per project, which is our Complex product development price. It covers one client platform, such as a web app, and each extra platform costs from 50% of the first one. Design, project management, testing, and the backend, integrations and admin panel your product needs are included. For example, a web app plus a cross-platform mobile app starts at $30,000. A first MVP costs less and runs as our MVP development service: a Basic MVP from $5,000 and at least 2 weeks, or an Extended MVP with more roles and integrations from $10,000 and at least 5 weeks, each for one client platform.

How long does it take to build a SaaS product?

A SaaS product takes at least 8 weeks, the minimum for Complex product development. The real timeline depends on the scope, and we name it in the estimate. A first MVP with the core workflow can come before the paid plans. Throughout the build, each sprint, usually one to three weeks long, ends with a working build or designs you can open, and you accept each milestone.

Should I start with an MVP or build the full SaaS product?

Start with an MVP if you still need to prove that customers will use and pay for the product. The MVP covers the core workflow, and plans, billing and SSO follow once the pilot shows what customers value.

Build the full product when the workflow is already proven, for example when you replace a tool your customers already use.

Skip the MVP when a small version cannot meet legal or safety requirements, or when the only open question is technical: then start with discovery. If a ready-made product or a no-code tool can test your idea first, we say so on the first call.

Which pricing model should my SaaS use?

Charge by what your customers already count as value: per seat for team tools, per transaction for a marketplace, one flat price for consumers. A free plan works when free users cost you little to run. We build the plan limits and billing for the model you choose. Our article on SaaS ideas and launch costs compares the models in more detail.

Do you build multi-tenant or single-tenant SaaS?

We build both. During discovery we suggest the tenancy model and agree it with you. Multi-tenant fits when all customers share one product and differ by data and roles. Single-tenant fits B2B partners that need their own instance with their own catalog, prices and users, synced from the core platform. Deleting a tenant can be scheduled for a date or after a delay, and cancelled before it runs, so a mistaken request does not erase a customer's data at once.

Can our SaaS pass an enterprise customer's security review?

We build the product to the requirements these reviews check: sign-in through the customer's identity provider, access by role, audit logs and separate data for each customer. SOC 2 is an auditor's report on your company. Ask your largest customers what they require. We can build to SOC 2 requirements before the audit.

Can you take over a SaaS built with Lovable or Bolt?

Yes. Our AI-built app rescue, from $2,500 and at least 2 weeks, audits the code and security of an app built with Lovable, Bolt, Cursor or a similar tool, fixes sign-in, data access rules and payments, and sets up tests, deployment and monitoring. Missing features are then quoted as an MVP.

How do you use AI agents in SaaS development?

Our engineers use AI agents at every stage: analysis, design, development, testing and DevOps. They set up the pipeline the agents work in, give them tasks and review every change before it is accepted. Autotests and QA agents check each commit. A developer, a team lead and a project manager review each feature. You review it on a staging build. Working with AI agents lets us deliver faster. The work is as reliable and as high in quality as traditional development. We use tools such as Claude Code, Codex, Cursor, OpenCode, Gemini and Ollama.

Is my product data used to train AI models?

No. Our AI agents run on business or API plans from AI model providers, and your data is not used to train AI models.

Who owns the code and IP of my SaaS product?

You own the code and IP from the first day, and ownership does not end when our collaboration does. The repository can be in your GitHub, GitLab or Bitbucket, and if work starts on our GitLab, we transfer it on request. Production runs in your own cloud account. At handover you get the source code, documentation, designs, credentials and deployment instructions, so another team can continue the work without us. We sign an NDA on request.

What support do you provide after launch?

We support the product monthly with monitoring, fixes and updates, and we estimate new features separately. Our DevOps and hosting service covers environments, CI/CD and monitoring. For products that take payments, support can include fixes to Stripe webhooks and payout onboarding. When the product needs more features, a dedicated team can continue the development.

Tell us what your SaaS product should do, and we will reply with a rough estimate and the questions we need answered first.