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FIG 01 · SaaS Development

SaaS development company: from first release to scale

Product design, multi-tenant architecture, billing, AI features and cloud operations from one team. The same team that designed and engineered Kenerate AI, a credit-based platform with 200+ AI models.

See how it works
Product manager reviewing a SaaS analytics dashboard on a large display in a modern product studio

FIG 02 · Quick answer

What does a SaaS development company do?

A SaaS development company designs, builds and runs subscription software delivered in the browser. Elgrith handles product discovery, UX, multi-tenant architecture, sign-in and roles, Stripe billing, APIs, AI features, cloud deployment and support for US, UK and Indian founders. We also designed and engineered Kenerate AI, a credit-based AI platform with 200+ models.

Projects delivered since 2015
1,000+
Clients served
250+
AI models in Kenerate AI, our flagship build
200+
Your code and IP
100%

FIG 03 · Why it matters

A stack chosen for hiring, not for hype.

We build SaaS on the tools most developers already use, so your product is easy to staff, hand over and extend. Figures from the Stack Overflow Developer Survey 2025 and W3Techs.

FIG 04 · Architecture

Multi-tenant or single-tenant SaaS?

Multi-tenancy means one application serves many customer accounts (tenants), with each tenant’s data kept separate. Most SaaS products start multi-tenant; some enterprise deals need more isolation. Here is how the options compare.

Shared database, separate schemas or single-tenant?
Shared database (row-level isolation)Schema or database per tenantSingle-tenant deployment
Best forMost new SaaS products and self-serve plansB2B plans with stricter data separationEnterprise customers and data-residency deals
IsolationTenant ID on every row, enforced in queries and policiesSeparate schemas or databases per customerA separate app and database per customer
Running costLowest: one stack to host and patchMedium: more databases to manageHighest: one stack per customer
UpgradesOne release reaches every tenantOne release, with per-tenant migrationsRolled out customer by customer
When not to useWhen a contract demands physical separationWhen you have thousands of small tenantsWhen you sell low-touch, self-serve plans

Many products mix them: a shared multi-tenant core, with isolated deployments for the few customers who need them.

Starting smaller? See MVP development

FIG 05 · What you get

SaaS development services

Eight services across the whole product, from the first clickable prototype to a multi-tenant platform that scales with your customers.

Laptop showing a SaaS product dashboard with usage chart and subscription settings
SaaS Development · built in-house

01

SaaS product discovery and UX

User interviews, jobs to be done, information architecture and a clickable prototype, so you test the product before paying to build it.

02

SaaS MVP to v1

A focused first release real customers can sign up for and pay for, built on production-grade code that grows into v1.

03

Multi-tenant architecture

Tenant isolation, roles and permissions, SSO and SAML for enterprise accounts, and audit logs that show who did what.

04

Subscription and usage billing

Stripe Billing with plans, trials, usage or credit metering, dunning for failed payments, invoices and tax.

05

AI features in SaaS

LLM features, RAG search over your customers’ data and in-product agents, with usage limits per account.

06

Integrations and public APIs

Webhooks, a documented public API, Zapier apps and CRM sync, so your product fits the tools your customers already use.

07

SaaS app development for mobile

Companion iOS and Android apps that share your accounts, permissions and billing with the web product.

08

DevOps, scaling and support

CI/CD, monitoring, backups and scaling, with security practices that support SOC 2 and GDPR reviews.

Deliverables

12

deliverables, in writing

Included in every build, written into your fixed quote before work starts.

FIG 06 · Under the hood

What a SaaS platform has to get right

Every SaaS shares the same core systems. We design them together, so sign-in, billing and data stay in sync as you grow.

  • Sign-up and SSO
  • Tenant accounts
  • Roles and permissions
  • Usage events
  • Stripe Billing
  • Public API and webhooks
  • AI models
  • Analytics
  • Onboarding

    What it covers
    Sign-up, invites, workspaces and first-run setup
    Why it matters
    Activation decides whether a trial becomes a customer
  • Tenant isolation

    What it covers
    Tenant IDs, row-level policies, scoped API keys
    Why it matters
    One customer must never see another’s data
  • Metering and credits

    What it covers
    Usage events, credit balances, plan limits
    Why it matters
    Usage pricing only works if every unit is counted
  • Billing and dunning

    What it covers
    Plans, trials, upgrades, failed-payment retries, tax
    Why it matters
    Failed payments quietly turn into churn
  • Audit logs

    What it covers
    Who changed what, and when, per tenant
    Why it matters
    Enterprise buyers ask for it in security reviews
  • AI features

    What it covers
    LLM features, RAG and agents, with per-account limits
    Why it matters
    Model costs must map to what each plan pays
    AI Development

FIG 07 · Flagship build

Proof: Kenerate AI, a SaaS we designed and engineered

Kenerate AI is an all-in-one AI image and video studio that customers sign in to and pay for with credits. It is the kind of multi-model, credit-billed SaaS we build for clients.

  • One app, one login and one credit balance across 200+ AI models
  • Credits never expire
  • 23+ studios and tools, with up to 4K output
  • MCP and CLI access inside Claude, ChatGPT, Cursor and 19+ AI apps
Kenerate AI section “Stop paying for fifteen AI apps”, comparing 15 separate apps with one studio, one login and one balance

The idea: 15 apps, 15 logins, 15 bills become one studio

AI models in one app
200+
Studios and tools
23+
Maximum output
4K
Guides
500+

FIG 08 · Buyer’s checklist

How to choose a SaaS development company

Seven questions to ask any SaaS partner, us included, before you sign.

07principles

  • A shipped SaaS you can log into

    Ask for a live product you can sign up to and use, not just screenshots.

    See Kenerate AI
  • Multi-tenant experience

    Ask how they isolate tenant data and handle roles, SSO and audit logs.

  • Billing experience

    Ask about plans, trials, metering, credits, dunning and tax, not just a checkout button.

  • IP ownership in writing

    Your contract should assign the code, designs and IP to you. Ours does.

  • Security practices

    Ask about access control, secrets, backups, dependency updates and how they handle a security review.

  • Post-launch support

    Launch is the start. Ask who monitors, patches and ships features afterwards.

    Support and maintenance
  • Time-zone overlap

    Ask when you can talk live. Our New Delhi day overlaps the UK morning, and we agree a regular call window for US teams.

FIG 09 · Process · 6 steps

Prototype, launch, then scale

Each phase has its own written scope and fixed quote, and you see working software at every sprint demo. You own the code and IP.

  1. Step 01

    Discovery

    We map your users, plans, roles and integrations, and agree what v1 must do. You get a written scope and a fixed quote for the next phase.

  2. Step 02

    Clickable prototype

    A tested prototype of the key flows: sign-up, onboarding, the core job and upgrade. You can show it to users and investors.

  3. Step 03

    MVP

    The first paid release: accounts, tenants, billing and the core feature, deployed to cloud accounts registered to your business.

  4. Step 04

    Beta

    Real customers use the product. We watch analytics and feedback, fix what slows them down and harden security.

  5. Step 05

    v1

    Roles, SSO, integrations, public API and the features your beta proved you need.

  6. Step 06

    Scale

    Monitoring, performance work, AI features and feature sprints as your customer base grows.

FIG 10 · What you get

Everything included

Written into your fixed quote, so you know exactly what you are paying for before work starts.

12items

  • Product discovery and written scope
  • Fixed quote for each phase
  • Clickable prototype and UI design system
  • Multi-tenant back end with roles and permissions
  • Stripe Billing with plans, trials and metering
  • Admin console for your team
  • Public API, webhooks and integrations, where needed
  • AI features with per-account usage limits, where needed
  • CI/CD, monitoring and backups
  • Deployment to your own cloud accounts
  • Analytics on activation and usage
  • Full source code, documentation and IP

FIG 11 · Tech & tools

The tools behind the work

Proven, well-supported tools, chosen for your project and set up in accounts your business owns.

  • React
  • Next.js
  • TypeScript
  • Node.js
  • Python
  • PostgreSQL
  • Redis
  • Stripe Billing
  • Auth.js
  • Clerk
  • Amazon Cognito
  • Vercel
  • AWS
  • Cloudflare
  • OpenAI
  • Anthropic Claude
  • Open-weight models
  • Model Context Protocol

FIG 12 · Who it’s for

SaaS for founders, scale-ups and agencies.

One team for product design, engineering, AI and cloud, with client partners in New York and London and engineering in New Delhi.

3 audiences

Founders

From idea to paying customers.

Discovery, prototype and MVP on production-grade code, so your first release doesn’t have to be thrown away.

  • Clickable prototype before the build
  • Billing from the first release
  • Analytics on activation and churn
  • Code in your repository from day one

FIG 13 · Working with us from the USA and UK

Built in New Delhi. Run on your hours.

Every project gets a point of contact in New York or London and an engineering team in New Delhi. Here is how today’s working days line up, live.

Three ways to work together

  1. 01

    Fixed-scope project

    A written scope, one fixed price and a dated plan. Suits websites, apps and MVPs.

  2. 02

    Dedicated team

    Designers and engineers on your roadmap every month, billed monthly.

  3. 03

    White label

    For US and UK agencies: our work, your brand, unbranded deliverables.

Every engagement

  • Fixed quote in USD, GBP or INR after a free 30-minute call
  • NDA before discovery. You own all code, designs and content
  • A working demo every sprint, not status slides
  • Reply within one business day, calls inside your hours
Book a call

Calls on ET or UK hours

FIG 14 · Tech stack

Our SaaS tech stack

Chosen per project, but this is where most of our SaaS builds start, and why.

Our SaaS tech stack
LayerWhat we useWhy
Front endReact and Next.jsFast, SEO-friendly marketing pages and app screens in one codebase
Back endNode.js and PythonNode.js for APIs and real-time features, Python for data and AI work
DataPostgreSQL and RedisReliable relational data with row-level security, plus fast caching and queues
BillingStripeSubscriptions, usage metering, invoices, tax and dunning without building a billing system
AuthAuth.js, Clerk or Amazon CognitoSign-in, SSO and SAML from a proven provider instead of hand-rolled auth
HostingVercel, AWS and CloudflarePreviews for every change, global delivery and room to scale
AIOpenAI, Anthropic and open modelsModel-agnostic, so you can switch on quality, cost or data policy

FIG 15 · Project type

New SaaS, rebuild or AI add-on?

Four common starting points, and when each one fits.

New SaaS, rebuild or AI add-on?
Best forNot for
Greenfield SaaSA new product with a validated problem and a clear first customerAn idea nobody has tested yet: start with an MVP
Replatforming a legacy appA product whose old code slows every release or blocks new featuresCode that works and only needs new features: extend it
Adding AI to an existing SaaSFeatures your customers ask for, such as search, summaries or agentsAI added for its own sake, with no plan for usage costs
White-label SaaS for agenciesAgencies that want to sell a SaaS build under their own brandAgencies that need a team on-site with their client

FIG 16 · Compare

SaaS development company, freelancers or in-house team?

SaaS development company, freelancers or in-house team?
SaaS development company (Elgrith)FreelancersIn-house team
Best forA full product: design, build, billing, cloud and supportSmall, well-defined pieces of workSaaS as your long-term core team
CoverageProduct, UX, engineering, AI, DevOps and SEOOne skill per personWhoever you hire
Time to startAfter a free call and a written scopeFast, if you can find the right peopleMonths of recruiting
ContinuityOne team from prototype to scaleDepends on each freelancerStrong, once hired
OwnershipCode and IP assigned to you in writingDepends on each contractYours

FAQ

Frequently asked questions

Straight answers about SaaS Development with Elgrith.

It designs, builds, hosts and maintains subscription software: product design, a multi-tenant back end, sign-in and roles, billing, integrations, security and scaling. Elgrith covers all of it with one team, from the first prototype to feature sprints after launch.

Free 30-minute call

Tell us about your SaaS. We’ll scope it with you.

Book a free SaaS scoping call. You get a written scope and a fixed quote for the first phase, and you own everything we build.

connect@elgrith.com+91 96039 20001Custom software development

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