SaaS and online service development

A tool people pay to use: accounts, plans, recurring payments and an admin panel with metrics. We launch a first version that earns before it grows.

05 08 service 5 of 8 in Websites Development

What’s included

  • A working tool people pay to use — calculators, generators, checkers, databases, dashboards
  • Accounts, plans, free tier and paywall
  • Recurring payments, invoices and cancellation handled properly
  • Usage limits, quotas and API keys if you sell access
  • Admin panel showing who pays, who churns and what they use
  • Public pages built for search, so the tool sells itself
  • Launched as a first version that earns before it grows

Who it’s for

  • Founders with a tool idea and no team to build it
  • Experts whose knowledge could be a paid instrument instead of a consultation
  • Businesses sitting on data — pricing, specs, registries — that others would pay to query
  • Existing free tools with traffic and no revenue

In short

SaaS is a tool people pay to use online: a calculator, a generator, a checker, a database or a dashboard with accounts, plans and recurring payments. We build it whole — from sign-up and the paywall to subscriptions, usage limits and an admin panel that shows who pays, who leaves and what they use. We launch a first version that earns before it grows, and public pages built for search so the tool brings clients itself. The code and the user data belong to you; the price is counted in hours and fixed before the start.

What can become a paid service

Knowledge, data or a routine task that people repeat again and again — that is what a good tool grows from.

  1. 01

    Calculators and configurators

    A cost, a dose, a load, a set of parts — an expert’s calculation turned into a tool anyone can use.

  2. 02

    Generators

    Documents, texts, images or plans built from a few inputs — often with AI inside.

  3. 03

    Checks and audits

    A site, a document, a counterparty or a dataset checked against rules — with a clear report.

  4. 04

    Databases and directories

    Prices, characteristics, registries — data you already have, with search and filters that others pay to use.

  5. 05

    Dashboards and reports

    Numbers from several sources gathered in one place and updated by themselves.

  6. 06

    Tools for teams

    A narrow process your industry does in spreadsheets — turned into a service with roles and history.

What a SaaS is made of

Beyond the tool itself, a paid service needs a whole layer around it. Here is the base and what is added for a task.

  • Accounts and sign-in

    Core

    Sign-up, sign-in, password recovery; passwords stored only as hashes.

  • Plans and a free tier

    Core

    What is free, what is paid and where the paywall stands.

  • Recurring payments

    Core

    Subscriptions, invoices, plan changes and cancellation — through a payment provider for your country.

  • Admin panel with metrics

    Core

    Who pays, who leaves, what they use — and the tools to help a specific user.

  • Public pages

    Core

    The landing, the plans, help and articles — built for search so the tool sells itself.

  • Protection

    Core

    Limits on how often forms and the API can be called, server-side validation, keys outside the code.

  • Teams and roles

    If needed

    Several people in one account with their own rights and an action log.

  • API keys and quotas

    If needed

    If you sell access to data or calculations: keys, limits and usage statistics.

  • Trial period

    If needed

    Full access for a few days — and a reminder before the first charge.

  • Promo codes and referrals

    If needed

    Discounts for launches and a reward for bringing new users.

  • Notifications and emails

    If needed

    Welcome emails, results ready, payment reminders — sent in the background.

  • Languages and currencies

    If needed

    For an international audience: interface in several languages, prices in local currencies.

A first version that earns before it grows

The most expensive mistake in SaaS is building for a year without users. A first version answers the main question quickly: will people pay?

  1. One main function

    The one thing people come for — done well. Everything else waits for real requests.

  2. Payment from day one

    Interest is checked by money, not by likes: a working paywall shows real demand.

  3. Simple plans

    One or two plans to start. Complex pricing scares people off and is hard to change later.

  4. Manual where possible

    While there are few users, some operations can be done by hand — and automated once it is clear they are needed.

  5. Metrics from the start

    Sign-ups, payments, churn and usage of each feature are visible from the first user.

  6. Growth by data

    The next features are chosen by what paying users actually do, not by guesses.

Subscriptions and payments done properly

Billing is the part users notice only when it breaks. That is why it is built carefully from the start.

  1. Recurring charges

    Monthly or yearly — through a payment provider that supports subscriptions in your country.

  2. A failed payment

    Retries, an email to the user and a soft lock instead of deleting their data.

  3. Cancellation in one click

    An honest cancellation means fewer disputes and chargebacks — and more people who come back.

  4. Plan changes

    Upgrades and downgrades with a correct recalculation for the unused days.

  5. Invoices and receipts

    Documents for companies and receipts for individuals — according to the rules of your country.

  6. Protection from repeats

    Payment notifications are signature-checked: a payment is never counted twice and access is never granted twice.

Common SaaS mistakes

  1. Building for a year without users

    By the time of launch the market has changed, and half the features turn out to be unneeded.

  2. Free forever

    Without a payment there is no check of demand — and no money to grow.

  3. A confusing pricing grid

    If it takes a minute to understand which plan to choose, many people leave.

  4. A hidden cancellation

    It brings disputes, chargebacks and bad reviews instead of retained users.

  5. No churn metrics

    Without them it is impossible to see why people leave and what to fix first.

  6. Built entirely on someone else’s no-code tools

    Quick at the start, but with growth it hits limits and subscription bills, and moving off is like building again.

Questions about building a SaaS

What is SaaS in simple terms?

A program that works in the browser and is paid for by subscription: users do not install anything and get access while they pay.

How much does it cost to build a service?

The price is counted in hours: it depends on the main function, payments, the admin panel and integrations. We usually start with a first version — it costs less and shows whether people will pay. The estimate is free.

How long until the first version?

It depends on the main function; each stage has its own date. The narrower the first version, the sooner it reaches real users.

How do I accept recurring payments?

Through a payment provider that supports subscriptions in your country. We connect it, handle failed payments and cancellations, and check every notification.

Who owns the code and the user data?

You do. The repository, the database and the hosting are registered to you and handed over at launch.

Will the service hold growth?

The architecture is chosen for the expected load: where response time matters we use Go, and the database is designed with indexes for growing data.

Can I sell access through an API?

Yes: API keys, request limits, usage statistics and documentation so other systems can connect without your involvement.

Do I need a mobile app?

Usually not at the start: a web service that works well on a phone covers most cases. A Telegram Mini App is a quick second entrance without app stores.

I have no technical team. Is that a problem?

No. We build the service and hand over the code with documentation, and after launch support can continue by agreement.

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Discuss
your service

Tell us about the idea, who will pay and for what — we will suggest what goes into the first version and estimate the work. The consultation is free.

Or write to [email protected]