SaaS Development Company for Founders Who Need a Product That Bills

SaaS development is more than building a web app with a login screen. A subscription product has to keep each customer's data separate, charge the right amount every month, enforce plan limits, recover from failed payments, run long jobs in the background and give your team an admin view when a customer emails support at 11pm. As a SaaS development company, we build those layers first, so the features you sell sit on a foundation that does not need rewriting once real customers arrive.

Our SaaS product development work serves three kinds of clients: founders turning a validated problem into a first paid product, operators whose internal tool has attracted interest from other companies, and agencies productizing a service they already deliver by hand. Our own product, AM Jarvis, is a SaaS suite for Shopify and WooCommerce stores, and building it taught us where the hard problems in SaaS actually live: usage limits, third-party API rate limits, jobs that run for twenty minutes, and customers who expect an undo button.

SaaS Product Development Services We Offer

Our SaaS application development services cover every item below. Most products need all of them eventually; we scope which ones belong in your first release and which can wait.

If your product is a companion app on a phone rather than a browser tool, our mobile app development company page explains how we handle iOS and Android. If you need software for internal use only, with no plans to sell it, custom software development is usually the better fit, because you can skip billing and tenancy entirely.

How We Deliver SaaS Development

1. Discovery sprint (1 to 2 weeks). We interview you and, where possible, two or three target customers, then map the core workflow from sign-up to the moment the product delivers value. The output is a written scope, a data model, wireframes of the main screens and a fixed price for phase one. The sprint fee is credited to the build if you go ahead.
2. Architecture and prototype (1 to 2 weeks). We choose the stack, the tenancy model and the billing provider, then build a clickable Figma prototype of the main flows. You test it with real prospects before we write production code.
3. Build in two-week cycles (typically 6 to 10 weeks). A staging environment goes live in the first cycle and you can log in from then on. Every cycle ends with a short demo, a changelog and a list of decisions we need from you. Code lives in a GitHub repository under your organization from the first commit.
4. Billing, onboarding and admin (final 2 cycles). Before launch we test the full account lifecycle: sign up, trial, first payment, upgrade, failed card, retry, cancel and data export. We also build the onboarding checklist and the admin tools your support person will need in week one.
5. Launch and hardening (2 to 4 weeks). We deploy to production with error tracking, uptime checks and automated backups, then run a real restore test. For the first weeks we watch logs daily and fix what real users uncover.
6. Iterate (ongoing). After launch you choose a monthly retainer or fixed-price phases for larger features, with a roadmap based on what customers actually use.

SaaS Product Development Deliverables and Launch Readiness Checks

At launch you hold more than a working app. Every SaaS build we deliver includes:

• The production application and a staging copy, both in cloud accounts owned by your company.
• The full repository with commit history, an automated test suite and a deployment pipeline that runs on every merge.
• A billing setup in your own Stripe or Paddle account, with products, prices and webhooks documented.
• An admin panel your support team can use without a developer, and a short recorded walkthrough of it.
• Product analytics events for sign-up, activation, trial start, payment and cancellation, sent to your analytics and ad platforms.
• Architecture notes, environment setup steps and a list of every third-party service with who pays for it.

Before we call a release ready, it passes a set of checks we can show you: a new customer can sign up, reach the core value and pay with no manual help from your team; a failed card moves the account into dunning and back out again when payment succeeds; a cancelled account loses access at the right time; one tenant cannot see another tenant's data in automated tests; and a backup has been restored to a clean server. Whether customers stay and pay depends on the product and the market, so we measure activation and retention with you rather than promising them.

SaaS Architecture Decisions That Are Expensive to Change

Some SaaS development choices touch every table and query, so changing them after launch means a migration project. We make these calls deliberately and record the trade-offs in the repository.

Tenancy model

Billing provider

Stripe Billing gives you the most control over plans, metered usage and invoices, and Stripe Tax can calculate and collect sales tax and VAT. With Stripe you remain the seller, so registering for tax and filing returns is still your responsibility. A merchant of record such as Paddle or Lemon Squeezy becomes the legal seller and handles tax collection and remittance for you, in exchange for a higher fee and less control over checkout. For a small team selling globally from day one, a merchant of record often saves more admin time than it costs.

Webhooks as the source of truth

Stripe documents that webhook events can arrive more than once and out of order. We process them idempotently, store every event we receive, and derive a customer's access level from subscription status rather than from whatever the checkout page said. Getting this wrong is the most common bug we find in inherited SaaS codebases: cancelled customers keep access, or paying ones get locked out.

Pricing metric

Seats, usage and flat tiers need different data. We build the metering your pricing needs and keep plan limits in configuration, so you can change packaging without a deploy.

What Building AM Jarvis Taught Us About SaaS

AM Jarvis, which Mustafa co-builds, covers bulk product importing with AI rewriting, Google Merchant Center fixes, bulk editing with undo, programmatic SEO and rank tracking. The AM Jarvis case study has the details. Four lessons from it shape how we build client products.

• Bring-your-own-key AI changes the cost model. AM Jarvis runs on each user's own API keys for Claude, OpenAI, Gemini, DeepSeek or Groq. Users pay providers directly, so there is no AI margin to manage, but the product has to store keys securely and translate each provider's error messages into something a store owner understands.
• Bulk work belongs in queues. Importing or editing hundreds of products cannot happen inside a web request. It needs a job queue, progress reporting, retries with backoff and respect for each platform's API rate limits.
• Changes to a customer's live data need a preview and an undo. If your product writes to someone else's store, CRM or website, users will only trust it when they can see the change before it happens and reverse it afterward. That means storing the before state of every change.
• Quality gates beat volume. Programmatic SEO without a uniqueness check produces pages nobody should publish. Any SaaS feature that generates content at scale needs a gate that blocks weak output before it reaches the customer.

Types of SaaS Applications Our SaaS Development Company Builds

• Vertical SaaS. Software for one industry, such as scheduling for a trade, compliance tracking for a regulated niche or job management for agencies, where deep fit beats broad features.
• Productized internal tools. A tool you built for your own team that peers now ask to use. We add tenancy, billing and onboarding without breaking the version your staff depend on.
• Shopify and WooCommerce apps. Merchant-facing tools that install into a store, use the platform's APIs and billing, and live with its rate limits. This is the same territory as AM Jarvis.
• AI-first SaaS. Products built around a model workflow, where cost per task, provider fallbacks and output quality checks are product features, not afterthoughts.
• Enterprise SaaS development. B2B products sold to larger companies, which add SAML or OpenID Connect single sign-on, SCIM user provisioning, audit logs, data residency options and security questionnaires to the scope.

SaaS migration from installed or single-client software

Some clients already have software running for one customer or installed on customer servers. Moving it to SaaS means adding tenancy, centralizing configuration, migrating each customer's data into the shared platform and switching them over in batches. We plan the batches so one customer's problems never block the rest.

SaaS App Development: Agency, Freelancers or In-House Team?

A common path with a SaaS product development company is to have us build the first release, hire your first in-house engineer once revenue justifies it, and keep us on a retainer while that person gets up to speed.

SaaS Development Mistakes That Stall a Product

• Building for every customer segment at once. A first release that tries to serve agencies, enterprises and solo users ends up serving none of them well.
• Manual onboarding hiding in the MVP. If a founder has to configure every new account by hand, the product cannot grow past the founder's calendar.
• Plan limits hard-coded in the app. Changing what a plan includes then needs a developer and a deploy, which slows every pricing test.
• No product analytics until after launch. Without activation and retention events from day one, the first months of customer behavior are lost.
• Skipping backups and restore tests. A SaaS product holds customers' data. One unrecoverable incident can end the business.

SaaS Platform Development Tech Stack

Why Choose 95 Solutions as Your SaaS Development Company

• We run a SaaS product ourselves. AM Jarvis is live, with real users, real API limits and real support requests. We test patterns on our own product before recommending them for yours.
• Senior-led from scoping to launch. Mustafa leads the strategy on every account. He holds a BS in Computer Science and has 11+ years in digital marketing, so sign-up events feed your ad platforms from day one. Our SaaS marketing agency team can take over the go-live plan.
• You own everything. The repository, cloud accounts, Stripe account and domain are in your name from day one, so a handover is a permissions change.
• Clear commercial terms. A paid discovery sprint credited to the build, fixed prices per phase, and contracts and invoices in USD from our US LLC.
• Working hours that fit you. Our hours overlap UK business hours and the full US business day, so demos, reviews and production incidents do not wait overnight.

How to Choose a SaaS App Development Company

Whoever you hire for custom SaaS development, three things predict delivery quality better than a portfolio:

• Discovery before a price. A team that quotes a fixed price for a SaaS product without a written scope and data model is guessing. Expect a short paid discovery phase that produces documents you keep.
• Pricing model that matches uncertainty. Fixed prices suit a well-defined phase; time and materials or a retainer suits work that changes weekly after launch. Ask which one they use when.
• A stack chosen for your future. The stack should suit your product and hiring plans, not the agency's habits. Ask which other SaaS developers could maintain the code without them.

Who Our SaaS Development Services Suit

A good fit

• Founders who have talked to potential customers, can describe the core workflow, and have a budget for a proper first release.
• Companies whose internal tool is being requested by partners or peers and who want to turn it into a product with accounts and billing.
• Existing SaaS products with a codebase that has stalled, needs billing fixed, or needs a team to take over from a departing developer.

Probably not a fit

• Projects that must launch with a formal compliance certification held by the development vendor, such as SOC 2 or HIPAA business associate sign-off. We do not hold those certifications.
• Equity-only or revenue-share arrangements. We work on paid contracts.

How Long Does It Take to Build a SaaS Product?

Building a SaaS product usually takes 2 to 4 months to a first paid release. A discovery sprint usually takes 1 to 2 weeks. A focused MVP with authentication, one core workflow, billing and an admin panel typically takes 8 to 14 weeks, depending on integrations and how quickly decisions are made. The biggest schedule risk is rarely code. It is scope that grows during the build, so we keep a visible list of "later" features.

SaaS Development Pricing

SaaS projects start with a paid discovery sprint that is credited to the build. After that, each phase (for example, the MVP) is quoted as a fixed price against the written scope, and post-launch development runs as a monthly retainer or further fixed phases. You see the starting points for each stage in the plans below.

What moves the price most: the number of user roles and permission rules, the billing model (flat plans are simpler than metered usage), the integrations the product depends on, AI features and their cost controls, enterprise requirements such as single sign-on and audit logs, and whether we start from scratch or take over existing code. Fixed prices suit a well-scoped phase like the MVP; once customers are shaping the roadmap week by week, a retainer is usually fairer to both sides.

For a quote based on your product, send us a short description through our contact page and we will reply with questions and a proposed discovery plan.

Start Your SaaS Product Development With a Short Call

Tell us who the product is for, the core workflow it handles and how you plan to charge for it. We reply within one business day, book a short call with Mustafa to test the idea and the scope, and then send a written discovery plan with a fixed fee that is credited to the build. If you already have code, we start with a paid review instead. Our how we work page sets out each stage, from first call to handover.

SaaS development sits within our wider software development practice, alongside web application development.