SaaS Development Services

SaaS products we build

Arcesso builds B2B and vertical SaaS products that charge customers a subscription for a focused workflow. Most clients are founders launching a first version, or companies turning an internal tool into a product they can sell.

Vertical SaaS serves one industry, such as clinics, logistics firms or home service businesses, and wins by fitting that industry's rules better than a general tool. B2B workflow SaaS replaces a spreadsheet process that many companies share. AI-assisted SaaS uses language models to read, draft or decide inside that workflow, with a human in the loop.

We start every SaaS project by naming the one job a customer will pay for, then build only what that job needs. Features that do not support the first sale wait for version two. Arcesso is not the right choice if you need a large consumer social app at launch scale; a bigger team suits that better.

Architecture: multi-tenancy, auth, billing and analytics

A SaaS product needs four foundations from day one: tenancy, authentication, billing and analytics. Getting them wrong early is the most common reason SaaS products need an expensive rebuild later.

Arcesso uses Postgres row-level security or schema separation for tenant isolation, chosen per product and tested with automated cross-tenant checks. Billing runs on Stripe, so card data never touches your servers, which keeps PCI scope small. Analytics events are defined in scoping, so you can measure activation from the first customer.

• Multi-tenancy: every query scoped to a tenant, with tests that try to read another tenant's data
• Auth: email, Google and Microsoft sign-in, roles and permissions, SSO for larger customers
• Billing: Stripe plans, trials, seats or usage pricing, invoices and failed-payment recovery
• Analytics: product events, activation and retention dashboards, plus audit logs

SaaS development cost and timeline

SaaS development cost depends mostly on the number of workflows, user roles and integrations in the first paid release. Billing complexity matters too: usage-based pricing costs more to build than simple monthly plans.

For context, Clutch reports an average custom software project of $132,480 across reviewed agencies, with average monthly spend of $10,209. Those are industry figures, not Arcesso prices. A focused SaaS MVP costs far less than a full platform, which is why we often start there.

Arcesso's timeline is typically six weeks for an MVP and 8 to 20 weeks for a first paid release with billing, admin and analytics. Arcesso quotes a fixed price after a one- to two-week scoping sprint, and the fee is credited in full to the build. The custom software development cost guide at /resources/guides/custom-software-development-cost/ explains the drivers in detail.

Building SaaS in-house vs with Arcesso

An in-house team suits funded SaaS companies with a long roadmap. An outside team suits founders who need a first version fast. Many clients do both: Arcesso builds version one, then hands it to the team they hire.

The table compares the two paths for a first release. If you already have a strong in-house team and only need extra hands, staff augmentation may fit better than a full build.

Adding AI features to a SaaS product

Arcesso adds AI to SaaS products as features customers pay for, not as a label. Typical examples are an assistant that answers questions from a customer's own data, automatic document extraction, and drafting replies inside a workflow.

Multi-tenant AI needs extra care. Each tenant's data stays separate in search indexes and prompts, so one customer's documents can never appear in another's answers. We test that with automated checks, and every AI feature gets an evaluation set before launch.

We build on OpenAI, Anthropic Claude, Google Gemini and open-weight models, with no-training settings on every vendor. Usage is metered per tenant, so you can price AI features in Stripe and protect your margins as usage grows. If a feature does not need AI, we build it without AI.

From MVP to scale

A SaaS product grows in stages, and each stage needs different engineering work. Arcesso plans the first release so the next stages do not require a rewrite.

Early on, speed and learning matter most, so we keep the architecture simple. Once paying customers arrive, the work shifts to reliability, onboarding and billing edge cases. Larger customers then ask for enterprise features. The list below shows what each stage usually adds.

• MVP: one core workflow, sign-in, Stripe checkout and basic analytics
• First paid release: roles, plans and trials, admin console, email notifications
• Growth: performance work, integrations, usage pricing and better onboarding
• Enterprise: SSO, audit logs, data export and security reviews for buyers
• Handover: docs and a runbook so your own team can take over at any stage