SaaS development
Build a SaaS product
on foundations that scale.
A SaaS development company for founders and teams. We build multi-tenant, B2B software, from a first SaaS MVP to the full platform, with auth, subscription billing and scale built in.
SaaS development is where product features meet the unglamorous machinery that makes a subscription business work: multi-tenancy, accounts, billing, permissions and the operations to run it all without drama.
Swarm Labs builds software-as-a-service products for founders and teams, from a first SaaS MVP that validates the idea, to the full B2B platform it becomes. We build the whole thing: the workflow customers pay for, and the auth, subscription billing and multi-tenant foundations underneath it.
We build on scalable, mainstream technology you own, so your platform grows with your customer base instead of hitting a wall, and adding the next tenant costs nothing but their sign-up.
The natural next step
A natural successor
to your MVP.
SaaS is where a validated MVP goes next. The MVP becomes the foundation, and we keep shipping versions as feedback comes in, so the product improves continuously without a rebuild.
Scope
What a SaaS build includes
The features customers pay for, plus the tenancy, billing and permissions that make a subscription business actually work.
Multi-tenant architecture
Isolated, secure tenants with team accounts and role-based access from day one: the foundation B2B SaaS needs to sell to real organisations.
Subscription billing
Stripe and friends wired to your entitlements: trials, plans, per-seat or usage billing, metering and dunning, with access that follows payment automatically.
Auth & permissions
Sign-up, SSO, roles and granular permissions done properly, so the right people see the right things and nothing leaks between tenants.
SaaS MVP to platform
Start with the one workflow that proves the value, then grow it into the full product on the same foundations, with no rebuild when it takes off.
Admin & operations
The internal tooling, dashboards and observability to run the product: onboarding, support, usage insight and the audit trail you need.
Scale, run & improve
Performance and reliability built in; hosted, monitored and improved by us, or handed to your team as clean, documented code.
Why Swarm Labs
The boring foundations,
done right the first time.
Most SaaS builds stall not on features but on the plumbing: tenancy, billing, permissions. We treat that as the product, because it is.
- Multi-tenant, auth and billing as defaults, not bolt-ons
- A SaaS MVP that becomes the platform, with no throwaway rewrite
- Own scalable, mainstream code, with no proprietary lock-in
- Billing wired to entitlements, so access follows payment
- Built and run by a UK team that measures what it ships
Questions
Frequently asked questions
What does SaaS development involve?
Building a software-as-a-service product means more than the features users see. It needs multi-tenant architecture, authentication, subscription billing, roles and permissions, and the operational plumbing to run it reliably. We build all of it, and design it so adding your next customer costs nothing but sign-up.
How do you build a SaaS MVP?
We start with the one workflow your product must nail, wrap it in the minimum viable account, billing and multi-tenant layer, and get it live for early customers. That validated MVP then grows into the full platform on the same foundations, with no rebuild.
How much does SaaS development cost?
The MVP is a fixed price, typically around £10k to £15k, so you know exactly what the first version costs. After that, most clients move onto a full retainer that covers both support and ongoing development. If you would rather work in cycles, we add you to our minimum retainer and quote per cycle (a milestone, an app version, and so on). Either way you are never locked into one opaque number for a year of work.
Can you build multi-tenant, B2B SaaS?
Yes. Multi-tenant isolation, team accounts, role-based access, per-seat or usage billing and admin tooling are our default foundations, not add-ons. Exactly what B2B SaaS needs to sell to real organisations.
Do you handle billing and subscriptions?
We integrate proven billing (Stripe and others) for subscriptions, trials, metering and dunning, wired to your entitlements so access follows payment automatically. See our Stripe integration work.
Will we own the platform and be able to scale it?
Unless otherwise agreed, you own the code, built on mainstream, well-supported technology chosen to scale with your customer base. We can host, monitor and keep shipping, or hand it to your in-house team, with no proprietary lock-in either way. In some engagements we instead license the application to you on a minimum term agreement, and we make clear which model applies before we start.
Let's build
Tell us what you
need built.
Book a call and we'll scope exactly what we'd build, and the hours it would win back.