Building SaaS Applications: Step-by-Step Guide

TL;DR: Build your own SaaS Application: How to create and launch a SaaS application

The article reveals the SaaS market overview, how to build a saas app, what SaaS is SaaS and its types. 

It also details:

• SaaS vs. on-premise.
• How to switch to the cloud-based software model:
• Migrate existing on-premise: Audit app, train team, pick cloud provider, execute tech migration.
• Build from scratch: Plan/validate, design tech stack, craft business plan, hire team, develop/launch MVP with Agile, testing, and beta.
• Costs: $15K–$500K+ (micro: $15–30K; complex enterprise: $150K+)

The software as a service (SaaS) market size continues to grow and is projected to hit USD 465.03 billion by 2026, up from USD 408.21 billion in 2025. The statistics indicate that more companies are adopting SaaS. The signal is clear: SaaS advantages for businesses are real. That’s why more and more businesses are interested in how to build a SaaS app.

What is SaaS?

Before talking about how to build a SaaS app (web app, mobile, desktop, embedded, API-first, etc.), let’s explain what it is. Imagine accessing software instantly online. No downloads needed. Instead of purchasing and installing software on their computers, users pay a subscription fee for access to software. It’s like the Netflix business model, where you “rent” a service, as opposed to owning a DVD. So SaaS is access to a third-party application over the internet.

Types of SaaS applications

Software development companies create saas applications of two types: vertical and horizontal. Each covers different market needs. 

Vertical SaaS targets specific industries with tailored solutions like healthcare EHR systems, legal case management platforms, or construction project trackers that address unique regulatory and workflow challenges. Since the development of such kind of apps requires deep industry expertise, they often are a high-priced product. 

Horizontal SaaS is a type of cloud software covering the needs of a wide range of business domains. For instance, email marketing automation, CRM platforms, or project management tools. Horizontal solutions scale rapidly by solving common pain points but face intense competition requiring constant innovation.

Differences between SaaS and on-premise software

Let’s clarify the essential differences between SaaS and on-premise software:

Moving on to how already existing on-premises software can migrate to cloud-based software. Then, we will dive into how to develop saas application.

How to switch from an on-premises to a SaaS business model?

If you’ve been delivering your services as license-based software for a few years now, this is what you have to do to convert to SaaS:

Step 1. Audit Your Current Software

Review your app’s functionality, integrations, pricing, special offers, and related details. Do you want to carry everything into your new business model, or is it worth revising? Maybe some of the features aren’t essential or have become rudimentary? Then there’s no point in spending resources to transfer them.

Step 2. Coach Your Team

Train your team to work with the cloud-based software. They can learn all the technical documentation and tutorials provided by a SaaS vendor on their own. Or, you can hire an expert who will give the workshops. It’s a better option because your specialists can ask any questions they have during the study.

Step 3. Choose Your Cloud Services Provider

To choose a reliable service provider, conduct market research. Pay attention to all factors important to your company: pricing options, reliability, the number of resources available, and client feedback.

Step 4. Migrate to SaaS

The migration takes considerable time. Starting from a few weeks to several months. It depends on the product’s complexity, required integrations, and the team’s expertise. The strategic decisions mentioned above will also take some time. In case of switching to a new tech stack and updating libraries, the migration timeframe may be extended.

How to build a SaaS app from scratch?

Building a SaaS application from scratch requires more time and effort than migrating an existing application. These are the steps you have to take to develop a truly successful product:

Step 1. Planning and validation

Building your own SaaS application typically starts with:

• Analyzing competitors;
• Defining pricing strategies;
• Reviewing user feedback;
• Identifying unmet needs.

And one more effective step to better understand the pain points of your target audience. Ask 10–20 potential customers about a specific problem your product is likely to solve:

• “How do you handle this problem today?”
• “What’s the most annoying part about your current solution?”
• “How much time/money does this problem cost you?”
• “When was the last time you faced this issue?”

With this information and insights, you can create an actionable, unique selling proposition that eventually can turn into revenue. Planning is about telling you and your team exactly what they will do. What kind of software as a service application will it be. Considering how to develop a SaaS application, here are practical approaches for both:

Idea generation

Start by pinpointing daily user problems. Use tools like Google Forms for surveys, then analyze responses meticulously. This shapes your direction accurately from the outset.

Target audiences

Create an ideal customer and buyer persona. In terms of companies, a profile can include:

Industry:

• Company size;
• Geography
• Key pain points;
• Tech stack (the software they currently use).

 For buyer persona:

• Job title and role (C-suit, marketing manager, sales representative);
• Motivations and goals;
• Their challenges and frustrations;
• Buying behaviour;
• Preferred channels of communication.

Concept validation

Use prototypes and wireframes that you can share with potential users. Based on their feedback, configure your product requirements. The result is a refined concept with strong viability and user appeal.

Competitor research

List niche leaders in your space. Adopt their strengths and identify the gaps that you can fill to get a competitive edge. Review statistical reports to estimate market size, growth, and long-term viability.

Key metrics

Track metrics like acquisition costs, lifetime value, conversion rate, net promoting score, user activation rate, and others from the start. Follow how new adjustments impact the demand for your service. Validate different pricing tiers to find the most profitable option. 

Funding and budgeting

Common financial sources for software as a service projects are:

• Bootstrapping;
• Angel investors;
• Venture capitals;
• Accelerators and incubators.

Whatever it is, you have to elaborate on a financial plan. Estimate such key components as:

• Revenue forecasting;
• Operational expenses;
• Capital expenditures;
• Cash runaway.

In the end, planning minimizes risks substantially. Validation conserves resources, paving confident paths to subsequent phases. Building SaaS applications thrives on this rigorous, methodical approach.

Step 2. Design and technology

Exceptional design captivates users right away. A robust technology stack ensures scalability when developing SaaS applications effectively.

Prioritize user experience

Sketch user journeys. Create a prototype and try to adhere to the following aspects:

• Focus on key features (MVP);
• User-centric navigation (intuitive, straightforward, and user-focused, adhering to the “three-click” rule (finding information within 3 taps);
• Consistent design system;
• Clear information hierarchy;
• Iterative and quick to change;
• One-handed operability (especially for mobile);
• Includes technical annotations;
• Includes necessary ancillary screens.

Collect feedback from focus group users to determine if your version provides a proper experience.

Frontend frameworks

Select frameworks based on the tasks you need to solve and your project requirements. For instance, React is well-suited for dynamic apps, Vue for simplicity, and Angular for enterprises.

Backend and databases

The same principle works here too: Select a specific open-source web application development framework for specific goals. To speed up development on the backend, pick Node.js; to ensure robustness, consider Django; and benefit from Rails when it’s required to accelerate prototyping. As to databases, you can handle relations with PostgreSQL, while MongoDB is suitable for operating unstructured data.

Cloud platforms

There are multiple cloud computing platforms, but we’ll mention three leaders in the vertical: AWS, Google Cloud, and Azure. All of them provide comprehensive cloud computing solutions (run applications, host websites, store data, and use advanced tools, etc.). Some of them have the upper hand in specific aspects. Google Cloud excels in AI, and Azure integrates seamlessly with Microsoft tools. All three help balance costs effectively.

Security and scalability

Speaking of how to create a SaaS application, keep in mind security remedies. It’s a top priority for users, especially in the financial industry. Implement MFA, OAuth, data encryption, and strict OWASP guidelines. For scalability, use microservices, Kubernetes containers, and dynamic auto-scaling to manage resources seamlessly.

DevOps practices

Implement CI/CD pipelines, automated testing, and monitoring tools such as Datadog. These boost efficiency throughout. To sum up, design drives powerful retention. Technology guarantees the top performance of the app.

Step 3. Hire Your Team

To turn your idea into reality, you need various professionals:

• A business analyst to help you audit the existing market and create a business plan
• A designer to create a clear and trendy interface for your app
• Software developers, who are responsible for the development of your web or mobile app
• A quality assurance engineer to ensure seamless usage of your software
• A project manager to organize the work of the whole team, sync the processes, adhere to deadlines, etc.

So, where do you find all these people? There are three main options:

1.Hire in-house team
This looks like the number one option, but don’t hurry. It is nice to have all of your employees in one office, but this step will cost you a fortune, too. Besides, sometimes there will be no job for them, but you’ll still have to pay them their salaries.

2.Hire freelancers
This option is much cheaper, but you will be overwhelmed with managing all these people. Besides, freelancers usually work on multiple projects simultaneously and tend to be unreliable.

3.Hire a remote team
Outsourcing is the best option in this case. You get a dedicated team, but you pay only for the actual job done. Besides, remote technical teams are usually managed internally, which gives you more time for strategic work.

Whether you are interested in building SaaS applications with an outsourcing company or looking for a mobile application development agency, choose a provider carefully. Check out the provider’s testimonials, reviews on Clutch, Goodfirms, or read their case studies.

Step 4. Development and launch

Development transforms visions into a tangible reality, with launch marking market entry when building a SaaS platform flawlessly.

Start by assembling teams strategically. Create a team structure based on their roles and responsibilities. Ensure steady product development by tracking progress in daily or weekly meetings, and record results in a task management tool.

Development of core features should be your top priority. Typically, it includes authentication and payment integration. Test exhaustively throughout the process. Execute quality assurance tests in parallel to the development progress. When a beta version of the product is ready, let a focus group of users test it. To define the initial user’s behavioral profile, use product analytics tools, such as Maxipanel.

You can implement multi-tenancy securely by isolating data with shared schemas. This approach enables conflict-free scaling at any level.

Optimize your product: Reduce load times to under 2 seconds. Image compression and data caching techniques should help. 

Create your marketing content:

• Service, product, landing pages;
• Case Studies and testimonials;
• Blog posts;
• Product tutorials and FAQs;
• Webinars and explainer videos;
• Reports and whitepapers;
• Ad campaigns.

Now, it’s time to move to the final section revealing how much does it cost to develop a cloud-based software solution.

SaaS development cost

Building a software as a service app costs range from $15K to $500K+. The key factors influencing the cost are:

• App type;
• Complexity;
• Scope;
• Compliance requirements (SOC2/HIPAA/PCI);
• Data isolation methods;
• Geographical regions where a company hires a team of developers. 

Below is a table representing the approximate cost range.

Across regions, developers charge different hourly rates. 

The figures are approximate and may vary by company. If you want to estimate your business project’s budget more accurately, use our software development cost calculator.

The Bottom Line

SaaS is a new normal for companies in diverse domains. It has already earned a reputation as a reliable, secure, and scalable solution to run business operations. Starting with sole proprietors, ending up with enterprise-level corporations, cloud-based software helps to improve performance and workflows. Auditing legacy apps, launching MVPs, and mastering risks — SaaS got you covered. Our guide explains how to build a SaaS app in theory.  But let’s create a specific roadmap to build or migrate your own SaaS software — book a call with our team. 

Partner with Litslink’s tech-savvy specialists for custom SaaS development that turns ideas into revenue-generating realities. Our proven track record in IT outsourcing and case studies speaks for itself.