Production-grade SaaS engineering · United Kingdom
You are not buying code. You are buying certainty.
Custom, AI-enabled SaaS built to a verifiable standard — every material decision recorded and auditable, risk transferred to us during delivery, and an asset your next CTO can inherit without archaeology.
- OWASP ASVS L2
- 90-day warranty
- 100% IP assigned
- EU AI Act aligned
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Built on the platforms you already trust.
The stack behind every build — the same tools your own engineers already vet.
- OpenAI
- Anthropic
- Google AI
- ElevenLabs
- n8n
- Make
The quiet failure
Most software engagements fail quietly.
Not at launch — but eighteen months later, when the original team is gone, nothing is documented, the codebase resists change, and a security review surfaces problems nobody can trace to a decision.
The people who made every decision have moved on — and the reasoning left with them.
No decision trail, no threat model, no runbook. Just code nobody can safely change.
A security review surfaces problems nobody can trace to a decision, and no one can say why.
FlowState IT was built to make that outcome impossible. Every material decision is recorded and auditable. Risk transfers to us during delivery. And you own an asset your next CTO can inherit without archaeology.
The standard
Engineered to be inherited.
Every build ships to a verifiable engineering standard — so your next CTO inherits an asset, not an archaeology project.
Modular, domain-separated, multi-tenant architecture
OWASP ASVS Level 2 engineering
Role-based access with immutable audit logging
Automated SAST, DAST, and dependency scanning
Infrastructure as Code environments
Defined RPO/RTO with automated backups
Structured logging, metrics, error-tracking, and alerting
Automated tests with enforced coverage thresholds
The Governance Pack
Every engagement delivers a documentation set your team — and your auditors — actually own:
- Architecture Decision Record
- Threat Model
- Security Posture Document
- Operational Runbook
- Forensic Handover
Every commitment is contractual. Risk transfers to us during delivery.
Trust & compliance
Every commitment is contractual.
We build to standards your customers' security teams already recognise — and we put them in writing.
OWASP ASVS Level 2 engineering
Aligned from the first line of code
Ready — controls mapped and evidenced
Full IP assignment on payment
Post-launch defect warranty
Real people, UK hours, no offshore black box
Systems we've shipped
Real, live builds — not testimonials. Open them yourself.
Fig Tree Hotel
A 24/7 AI voice agent answering a real UK hotel's line — booking enquiries, call routing, and human handoff, in production.
Voice AI, in productionWhere custom software and AI create leverage.
If your customers are enterprises, government bodies, or regulated firms, your software will be audited whether you plan for it or not.
Regulated SaaS
Multi-tenant portals for firms whose customers run security questionnaires — access logs and evidence generated by design.
Ops Automation
Back-office that runs itself: invoicing, reporting, reconciliation, and follow-ups automated end to end, with monitoring so failures surface before customers notice.
AI Intake
Lead capture and qualification — voice and chat agents that engage enquiries 24/7, qualify them, and book the meeting.
Knowledge
Query your own documents — internal docs and SOPs turned into an assistant your team can ask, with citations and access control.
Fractional CAIO
AI leadership on tap — a roadmap for where AI creates leverage and where it doesn't, plus the governance to roll it out safely.
Migration
Inherit a system cleanly — take over an undocumented codebase; we produce the decision trail, threat model, and runbook so your team owns it, not fears it.
What we build — custom software and AI development.
Six services, one standard. Explore all services.
Custom AI-Enabled SaaS
Production systems built to a verifiable engineering standard, designed against the EU AI Act's requirements from the first line of code.
- Modular architecture
- Multi-tenant
- Audit-ready
- IaC environments
AI Automation Workflows
Kill repetitive work. We map your process and automate the handoffs end to end, with observability from day one.
- Process mapping
- Task automation
- Integrations
- Monitoring
Custom AI Integration
Bring AI into the tools you already use — CRM, docs, data — with least-privilege access and full audit logging.
- CRM & docs
- Data pipelines
- APIs
- Access control
Voice AI Solutions
Voice agents that answer calls, book appointments, and handle enquiries around the clock, with human handoff.
- Inbound calls
- Booking
- Call routing
- Human handoff
Enterprise AI Strategy
A clear roadmap for where AI creates leverage — and where it doesn't — with risk and governance built in.
- Opportunity map
- Roadmap
- Risk & governance
- Rollout plan
Fractional CAIO Services
Senior AI leadership on tap — a Chief AI Officer without the full-time hire.
- AI leadership
- Team enablement
- Vendor selection
- Ongoing steer
How we deliver
Four stages. You are never locked in.
- 01
Stage 0 — Discovery & Technical Audit
Fixed fee · 2–3 weeks · credited against the build. You get a system architecture proposal, a threat model, a compliance gap analysis, a phase-level roadmap, and a fixed-price Stage 1 proposal.
- 02
Stages 1–4 — Phased Build
2–4 week phases · invoiced per phase. The build is decomposed into phases with written acceptance criteria agreed before each begins. You approve each phase before the next starts, with continuous access to staging, the repository, and a weekly written status report of work, risks, and decisions.
- 03
Post-Launch Warranty — 90 Days
Any defect against the agreed acceptance criteria found within 90 days of launch is fixed at no cost. Critical issues in 4 business hours; major issues in 2 business days.
- 04
Continuity — Optional
Monthly · scoped to your risk profile. Dependency and vulnerability patching, threat-intelligence response, monitoring and incident triage, and defined enhancement hours.
- OWASP ASVS L2
- IaC + immutable audit logging
- SAST/DAST in CI
- UK-based
- — You approve each phase before you pay for it.
- — 100% IP assigned to you on payment.
- — You can stop at any phase boundary.
Engagement & pricing
Priced by scope. Approved by phase. Owned by you.
£50,000–£150,000
Typical production SaaS engagements, depending on scope, integrations, and compliance depth.
Stage 0 is a fixed fee — and it's credited
The Discovery & Technical Audit is a fixed price, credited in full against the build if you proceed.
Per phase — you approve before you pay
Each 2–4 week phase is invoiced on its own, against acceptance criteria you agreed up front.
100% IP assigned on payment
Code, configuration, and documentation are yours — no lock-in, no hostage-taking.
90-day defect warranty
Anything that fails against the agreed acceptance criteria within 90 days of launch is fixed at no cost.
Risk reversal
We take the risk. You keep the asset.
Every commitment below is written into the contract — not implied, not verbal. Risk transfers to us during delivery.
90-Day Defect Warranty
Any defect against the agreed acceptance criteria, found within 90 days of launch, is fixed at no cost.
Critical: 4 business hours · Major: 2 business days · Written into the contract.
100% IP Assigned on Payment
You own everything — code, infrastructure, and the full decision trail — assigned to you on payment.
No lock-in. No hostage code. No dependency on us to keep it running.
Approve Every Phase Before You Pay
The build is decomposed into phases with written acceptance criteria agreed before each begins. You approve each phase before the next starts.
Invoiced per phase · Stop at any phase boundary.
Stage 0 Credited Against the Build
The Discovery & Technical Audit is a fixed fee, credited in full against your build.
Not the right fit? You keep the architecture proposal, threat model, and roadmap.
The Production-Grade SaaS Buyer's Checklist
The 30-point checklist we use to audit whether a software build will survive its first security review and its next CTO.
Get the checklistYour AI-Readiness Score
Eight questions, an instant 0–100, and an honest report on where your build is exposed before it's audited.
Score my buildQuestions, answered.
What clients say
Client references available on request.
We don't publish quotes we haven't been given written permission to share. Ask on your scoping call and we'll arrange an introduction to a reference who has worked with us — you hear it from them, not from our marketing.
The most honest proof is a build you can open yourself — see the systems we've shipped above.