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MentallionSystems
AI automation for UK letting & estate agents

Stop letting viewer enquiries and maintenance tickets pile up

Keep every property enquiry moving

We build enquiry follow-up, viewing qualification and maintenance-triage workflows for letting and estate agents. Most standard projects launch in 2–3 weeks.

Fixed price. Connected to your existing tools.

15 minutes · No obligation · Speak directly with an engineer
Starter build starting from £695Automation audit starting from £195
Most standard projects live in 2–3 weeks · No obligation
What
Enquiry follow-up, viewing qualification and maintenance triage.
How
Connected to your portals, inbox and booking process.
Why
Keep enquiries moving without adding repetitive office work.
Scope agreed first Fixed setup price Optional monthly care
Example workflow Human handoff included

From new enquiry to a clear next step

Automation moves the repetitive information. Your team keeps control of decisions and exceptions.

Business workflow planning with a laptop and process notes
  1. 01
    Enquiry arrivesWebsite, email, phone or messaging
  2. 02
    Reply and qualificationUsing questions and rules agreed with you
  3. 03
    Book or update your systemCalendar, CRM and team notification
Existing tools stay in place Exceptions reach a person
Starter builds · starting from£695fixed one-off setup
Automation audit · starting from£195audit · credited if you build
Most standard automation launches
Setup scope agreed before work
Notice on optional care plans
Bespoke deliverables documented
Next.jsPythonLangChainSupabasePostgreSQLTypeScriptOpenAIAnthropicawsAWSDockerRedisStripe
Business owner working with a laptop and process notesBuilt around your tools
Example live workflow
Enquiry received
Qualified & routed
Your team takes over
The Reality For Growing UK Businesses

Sound familiar?

Managing inbound enquiries across Rightmove, Zoopla, and phone lines burns hours of office time every day.

Speed to Lead
Speed to Lead

Portal enquiries sitting unanswered overnight

Tenants and buyers enquire at 9pm. By 9:30am the next morning, your inbox is flooded with duplicate requests and frustrated applicants.

Admin Overhead
Admin Overhead

Staff answering the same 5 questions all day

Is the property pet-friendly? What is the deposit? Is parking included? Staff waste hours answering details already written in the listing.

Siloed Systems
Siloed Systems

Unqualified viewing bookings

Negotiators traveling to empty properties for viewings only to discover the applicant has insufficient income or an incompatible move-in timeline.

Agency Lock-in
Agency Lock-in

Chaotic maintenance reporting

Tenants reporting issues via phone with vague details ('the boiler is broken'), requiring multiple calls before a contractor can even be quoted.

Speed to Lead
Speed to Lead

Portal enquiries sitting unanswered overnight

Tenants and buyers enquire at 9pm. By 9:30am the next morning, your inbox is flooded with duplicate requests and frustrated applicants.

Admin Overhead
Admin Overhead

Staff answering the same 5 questions all day

Is the property pet-friendly? What is the deposit? Is parking included? Staff waste hours answering details already written in the listing.

Siloed Systems
Siloed Systems

Unqualified viewing bookings

Negotiators traveling to empty properties for viewings only to discover the applicant has insufficient income or an incompatible move-in timeline.

Agency Lock-in
Agency Lock-in

Chaotic maintenance reporting

Tenants reporting issues via phone with vague details ('the boiler is broken'), requiring multiple calls before a contractor can even be quoted.

← Swipe to explore bottlenecks →
SELECTED PROJECTS

The problem, build and outcome: at a glance.

Browse project work without opening long case studies. Every card shows what the client needed, what we built and the practical result.

7 projects
ClassPilot automated grading interface with inline evaluationEdTech / Grading Automation

ClassPilot

Project contact: Benjamin

Automated student assessment marking with real-time feedback and teacher override

OutcomeTeacher-led

Automated marking with manual review and override

Problem

Teachers were spending large amounts of manual time grading student submissions by hand, leading to delayed student feedback and burnt-out educators.

What we built

Engineered an automarking system using Gemini Vision for visual and text assessment, structured JSON streaming for live rubric scoring, teacher override checkpoints, and admin/teacher RBAC.

Gemini VisionStructured JSON StreamingMulti-Role RBAC+2
Genial AI multi-tenant enterprise agent management workspaceEnterprise AI Platform

Genial AI

Project contact: Fabien

Multi-tenant platform letting enterprises deploy teams of task-specific AI agents

OutcomeMulti-Agent

Separate agents, data and permissions by workspace

Problem

Enterprises required multiple specialised AI agents rather than one generic chatbot, configured for distinct departmental workflows and securely partitioned across team workspaces.

What we built

Architected a scalable multi-tenant SaaS platform where admins can spin up custom agents, define bespoke system prompts, mount specific data sources, and manage team permissions.

Multi-Tenant SaaSPer-Agent System PromptsNext.js 15+2
Prism autonomous brand audit executive output reportAI Brand Strategy / Audit

Prism

Project contact: Aaron Evans

Autonomous 4-stage brand audit from a single URL to a full, data-backed strategy in minutes

Outcome4 stages

From URL analysis to a structured brand audit

Problem

Brand audits are normally slow, expensive, and frequently rely on subjective or generic AI opinion rather than verifiable evidence.

What we built

Engineered an autonomous multi-stage pipeline using Claude and Gemini to scrape, analyze, cross-examine market positioning, and synthesize revenue-leak insights with strict data privacy.

Anthropic ClaudeGeminiMulti-Stage Autonomous Pipeline+2
Frontdesk AI clinic coordination and voice operations dashboardHealthcare / Clinic Operations

Frontdesk AI

Project contact: Justin

End-to-end clinic operations platform combining voice booking, retrieval Q&A, and daily briefings

Outcome8 Workflows

Connected automations for clinic operations

Problem

Healthcare clinics required a reliable operations system that could answer patient queries accurately from genuine protocol documents, refuse questions not covered by those documents, automate voice booking, and produce daily management briefings.

What we built

Architected a hybrid RAG pipeline on pgvector and Cohere with deterministic refusal guards, connected to a Vapi conversational voice agent, multi-agent LangGraph orchestrator, custom MCP server, and Supabase backend.

pgvectorVapi Voice Agentn8n (8 Workflows)+4
Legal research platform citation verification pipelineLegalTech

Legal Research Platform

Project contact: David

Direct API integration with LexisNexis and case law databases for verified citations

OutcomeSource-led

Research output linked back to legal sources

Problem

Attorneys cannot use generic generative AI tools because ungrounded LLMs frequently hallucinate legal citations or misquote statutory precedents.

What we built

Implemented deterministic retrieval pipelines that query official legal APIs, cross-reference judicial opinions, extract verified holdings, and present verifiable hyperlinked sources for human legal review.

LexisNexis APICase Law Database APIsPython+2
Conversational career guidance interface with structured stepsConversational AI / Guidance

Career Guidance Chatbot

Production conversational AI providing structured, actionable student career pathways

OutcomeLive

Deployed in production on Railway infrastructure

Problem

Students seeking guidance were overwhelmed by unstructured career sites and walls of generic text that failed to provide actionable next steps.

What we built

Developed a structured conversational assistant that parses student interests, guides them through discovery questions, and outputs cleanly formatted action plans.

PythonOpenAIRailway+1
Persona AI serverless backend infrastructure architectureBackend & Cloud Infrastructure

Persona AI

Personality-assessment SaaS running on a 71-function serverless backend with Big Five scoring

Outcome71 functions

Serverless backend mapped, repaired and documented

Problem

The client needed a resilient, high-concurrency cloud architecture to score complex personality assessments in real time, securely store sensitive PII, and handle recurring subscriptions smoothly.

What we built

Engineered a distributed serverless architecture on AWS Lambda with PostgreSQL column encryption, algorithmic psychometric normalization, and automated Chargebee subscription hooks.

awsAWSNode.jsPostgreSQL+2
CLIENT REVIEWS

Feedback from founders and operators

Short summaries of client feedback from software, AI agent and workflow projects.

1 / 5
CP

ClassPilot

Benjamin, Founder

What mattered to me was keeping teachers in control. That was understood from the start, and the handover was straightforward.

GA

Genial AI

Fabien, Founder

Working with Mentallion was refreshingly straightforward: clear updates, sensible decisions and no chasing for progress.

PR

Prism

Aaron Evans, Founder

I only had a rough idea when we started. By the end, I had something working that I could actually use.

FA

Frontdesk AI

Justin, Founder

Fallbacks were not treated as an afterthought. That made a real difference, and the system is easier for our team to manage now.

LR

Legal Research Platform

David, Lead Counsel & Founder

What I appreciated most was the restraint. Not every problem was treated as an AI problem, and source-checking stayed central.

PA

Persona AI

Marcus, Co-Founder

The backend was complicated, so I valued the fact that Mentallion mapped it properly before changing anything. It is far more manageable now.

CG

Career Guidance Chatbot

Sarah Jenkins, Project Lead

Our team is not technical, but the explanations always made sense. Questions were welcomed and nothing felt rushed.

HOW IT WORKS

Simple, transparent steps from idea to live automation

We design practical automations across operations, customer service, documents, reporting and internal workflows, connected to the tools you already use. You talk directly to an engineer, agree a fixed scope and know what happens next.

01

Free 15-Min Discovery Call

A quick, no-obligation conversation to pinpoint the 2–3 bottlenecks draining the most time in your business.

02

Quick-Win Audit or Package Setup

Get a £195 audit (fully credited toward your package) or jump straight into setup. We scope the workflows before building.

03

Build, Test & Handover

We build and connect the agreed automation to your tools, then test it with your team before launch. Most standard projects take 2–3 weeks, complex integrations take longer.

04

Rolling Care & Monthly Tweaks

If you choose an ongoing care plan, we monitor health and handle agreed tweaks month-to-month. Care plans can be cancelled with 30 days' notice.

Want to see how this works for your specific business?

TRANSPARENT UK PRICING

Fixed-scope automation with no long-term lock-in

Setup costs and optional monthly care fees are shown upfront. Care plans roll month-to-month with 30 days' notice; third-party software and usage charges are scoped separately.

FREE FIRST CONVERSATION

Free 15-Minute Discovery Call

Unsure if automation will work for your workflow? We review your current bottlenecks, check technical feasibility, and give you an honest recommendation.

POPULAR FIRST STEPDelivered in 3–5 working days

AI Quick-Win Audit

£195one-off

A written audit of your 2–3 highest-impact automation opportunities, plus one small proof of concept or configuration where technically suitable.

✓ Fully credited toward the setup fee of any package below if you proceed within 30 days.
Sole Traders & Small Trades01

Starter

Capture missed enquiries and automate routine customer follow-up.

Setup feeOne-off deployment
£695
Monthly careOptional
Rolling monthly
£149/mo
For: Sole traders, small trades, and local service businesses
INCLUDED IN SETUP:
  • One core automation built and deployed (e.g. missed-call text-back + lead capture + CRM sync, or automated booking reminders)
  • Connection to your existing phone, WhatsApp, calendar, or email
  • Deterministic guardrails and error fallbacks
  • Team walkthrough and testing before going live
  • Documented handover of bespoke code and workflows, subject to payment and third-party licences
MONTHLY CARE INCLUSIONS:
Optional
  • Continuous monitoring and error alerts
  • Up to 1 hour/month of workflow tweaks and maintenance
  • Email support (next business day response)
  • Monthly one-page performance summary report
  • Rolling month-to-month contract (cancel with 30 days' notice)
Delivery1–2 weeks to live deployment
SupportNext business day email response
MOST POPULAR
02

Growth

Your AI agent learns your business, not a generic chatbot.

Setup feeOne-off deployment
from £999
Monthly careOptional
Rolling monthly
£249/mo
For: Recruitment agencies, letting/estate agents, clinics, e-commerce, accountants, small professional services firms
INCLUDED IN SETUP:
  • AI agent (chat, WhatsApp, or voice) trained on your specific business, services, and FAQs
  • 2–3 connected workflows across customer qualification, intake, and booking
  • Bi-directional CRM and calendar integration
  • Strict deterministic guardrails to prevent hallucinations and off-brand answers
  • Human-in-the-loop escalation gate when complex issues arise
MONTHLY CARE INCLUSIONS:
Optional
  • Up to 4 hours/month of changes, prompt tuning, and workflow additions
  • Priority support (same UK working day response)
  • Continuous uptime monitoring and error telemetry
  • Monthly performance and optimisation review
  • Rolling month-to-month contract (cancel with 30 days' notice)
Delivery2–3 weeks to live deployment
SupportSame UK working day priority response
Multi-Location & Mid-Market03

Scale

Multi-agent orchestration and deep multi-system integration.

Setup feeScoped after discovery
from £1,995
Monthly careOptional
Rolling monthly
£495/mo
For: Multi-location businesses and established SMEs with more complex operations
INCLUDED IN SETUP:
  • Multi-agent orchestration across operational departments
  • Deep integration across multiple existing ERP, CRM, and internal databases
  • Automated document processing pipelines (invoices, compliance records, PDFs)
  • Granular role-based access and audit-ready data tracking
  • Role-based access and data-handling controls scoped around your UK GDPR obligations
MONTHLY CARE INCLUSIONS:
Optional
  • Up to 10 hours/month of dedicated engineering modifications and improvements
  • Named senior engineer as your direct point of contact
  • Quarterly strategy and operational optimisation review
  • Priority incident response during UK working hours
  • Rolling month-to-month contract (cancel with 30 days' notice)
Delivery3–5 weeks to live rollout
SupportNamed senior engineer contact (same-day)
Monthly care plans are optional and roll month-to-month with 30 days' notice.
View bespoke builds and full package details
BESPOKE BUILDS & SAAS PLATFORMS

Custom Software & SaaS Builds

For larger builds, such as a full SaaS platform, a legacy system rescue, or bespoke enterprise software, we agree a fixed project fee, typically £6,000–£18,000+ depending on complexity before any work starts. An optional care plan from £699/month is available after launch for ongoing support and iteration.

Project pricing:
£6,000 – £18,000+ fixed fee
Optional ongoing care plan from £699/month
WHY MENTALLION SYSTEMS

Built for ambitious businesses who want practical results, not agency hype

We strip away account managers, confusing buzzwords, and predatory lock-in contracts. You work directly with senior engineers focused on verified ROI.

Clear ownership and handover terms

Bespoke deliverables are handed over after payment, with project documentation and transferable access where providers allow it. Third-party and open-source licences remain subject to their own terms.

Direct senior engineers, no account managers

Direct Communication

Work directly with the software engineers who architect, write, and deploy your code. No middle management telephone games and no outsourced call centres.

No long-term lock-in

Low Risk

Monthly care plans are optional and roll month-to-month. You can cancel a care plan with 30 days' notice.

Fixed price, agreed upfront

No Surprises

Setup costs and monthly care fees are agreed before work starts. Any change in scope is discussed and approved first.

Senior-led delivery

Production Rigor

Work directly with experienced software engineers who build and ship production systems. No junior handoffs or untested trainees.

TRANSPARENT ANSWERS

Frequently Asked Questions

Clear, straightforward answers about our technology, data privacy, cancellation terms, and code ownership.

Project availability

What would you rather stop doing manually?

We limit concurrent projects so each engagement receives direct engineering attention. We will confirm current availability on the discovery call.

No pressure and no automated sales sequence after the call.

No obligation 15-min callFixed price agreed upfrontRolling month-to-month
Start a conversation

Tell us what needs to work better.

Share the repetitive bottleneck, the software tools you use, and what a successful outcome looks like. A lead engineer will reply within one business day.

You speak directly with a lead engineer.

Fixed price agreed upfront before any work.

No persistent sales follow-ups.

Direct enquiry

By submitting, you agree that a UK engineer may contact you about this enquiry.