Platform vs Agency

Estate agent AI chatbot:
custom agency build vs self-serve platform

A growing number of UK agencies offer to build AI chatbots for estate agents as custom projects. Before you commission one, it is worth understanding what you are actually buying — and whether a self-serve platform does the same job for less.

Try Sift free for 14 days Calculate your lead loss

Two models, one problem

Custom agency build

You brief them. They build. You wait.

AI automation agencies offer bespoke chatbots built to your brief — custom flows, your branding, your specific scripts. The result is tailored. The process is not fast.

  • ✗ Weeks from brief to live
  • ✗ Agency dependency for every change
  • ✗ £197+/month (custom overhead priced in)
  • ✗ Lead delivery is an extra configuration step
  • ~ UK qualification depth varies by agency
  • ~ GDPR compliance depends on their implementation
Self-serve platform (Sift)

You install. It qualifies. You own it.

Sift is a fully built platform you configure and control through a dashboard. No agency in the loop, no waiting for changes, no ongoing dependency.

  • ✓ Live in 10 minutes from signup
  • ✓ You make changes in real time via dashboard
  • ✓ £149/month — no custom build overhead
  • ✓ Leads in dashboard · CSV export · Zapier / outbound webhook (Growth/Scale)
  • ✓ 14-point UK buyer scoring built in
  • ✓ GDPR consent capture built into qualification flow

Side-by-side comparison

Feature Custom agency build Sift (self-serve)
Time to go live2–6 weeks✓ 10 minutes
Monthly cost£197+/month✓ From £149/month
24/7 out-of-hours qualification✓ Yes✓ Yes
UK chain status qualification~ Depends on brief✓ Built in
DIP / AIP confirmation~ Depends on brief✓ Built in
Help to Buy / Shared Ownership~ Depends on brief✓ Built in
14-point UK buyer scoring✗ Custom only✓ Standard
Lead delivery to your team~ Extra config step✓ Dashboard + CSV + Zapier / outbound webhook (Growth/Scale). Native CRM integrations on roadmap.
Make changes yourself✗ Re-brief agency✓ Dashboard, real time
GDPR consent capture built in~ Varies✓ ICO audit trail
Free trial available✗ Typically not✓ 14 days, no card
Cancel anytime✗ Contract-based✓ Month-to-month

The real cost difference over 12 months

Custom agency build
£2,364+
At £197/month for 12 months — not including setup fees, change requests, or additional development time, all of which are common.
Sift annual plan
£1,490
2 months free on annual billing. Everything included. No setup fee, no change request costs. Cancel any time.

The price gap is £874+ in year one. The more important gap is time: while a custom build is in briefing and development, your out-of-hours leads are still going unanswered.

When does a custom build actually make sense?

Custom builds have a place — but it is narrower than the sales pitch suggests. Commissioning a bespoke build is genuinely justified when:

You have highly unusual qualification flows

Complex commercial property qualification, specialist HMO processes, or new-build reservation flows that differ significantly from standard residential sales.

You need deep integration with proprietary internal systems

Bespoke internal databases or non-standard back-office setups that cannot consume a generic outbound webhook or CSV export.

You are a large multi-branch network with white-labelling requirements

20+ branches needing deep brand customisation and bespoke reporting. Note: Sift's Scale plan includes white-label widget and multi-branch management from £549/month.

For the majority of independent UK estate agents — 1 to 5 branches, on a standard CRM, running standard residential sales and lettings — a self-serve platform delivers the same outcome faster, cheaper, and with full control.

Frequently asked questions

An AI chatbot agency builds a custom solution for your specific agency — you brief them, they build, they maintain it. This typically takes weeks, costs more, and means you depend on the agency for every change. A self-serve platform like Sift provides a ready-built product you install yourself in minutes — configured through a dashboard with no external agency needed. For most independent estate agents, the self-serve model is faster, cheaper, and gives you full control.
Yes. Sift is built specifically for UK estate agents and includes UK-native qualification signals that custom builds rarely implement out of the box: chain-free status, Decision in Principle (DIP/AIP), Help to Buy and Shared Ownership eligibility, stamp duty position, and a 14-point buyer scoring model. These are standard features in Sift — not add-ons you need to brief separately.
Sift takes approximately 10 minutes: embed a script tag on your website and you are live. Leads land in the Sift dashboard with full transcript, GDPR consent record, score and contact details — export via CSV at any time, or connect to 6,000+ apps via Zapier or forward leads to any URL via outbound webhook (Growth/Scale). A custom agency build typically requires a briefing process, development time, and testing before going live — usually measured in weeks. If out-of-hours enquiries are happening tonight, you cannot afford weeks of lead time.
Leads land in the Sift dashboard with full conversation transcript, GDPR consent record, lead score, and contact details. Export via CSV at any time. On Growth and Scale plans, leads can be connected to 6,000+ apps via Zapier or forwarded to any URL via outbound webhook. Native integrations with leading UK estate agent CRMs are on the roadmap. No platform migration required — you keep your existing CRM exactly as it is.
With Sift, you make changes yourself through the dashboard — update qualification questions, adjust tone, add custom instructions — all in real time with no developer involvement and no additional charge. With a custom agency build, changes require re-briefing the agency and waiting for a development cycle. Over 12 months this agility difference matters significantly.
Yes. Sift captures GDPR consent before collecting any personal data, maintains a full ICO audit trail automatically, and supports Subject Access Requests and Right to Erasure. This is built into the qualification flow by default — you do not need to add a separate consent layer or brief an agency to implement it correctly.

Live in 10 minutes. No agency required.

Sift qualifies buyers 24/7. Leads land in the Sift dashboard — export via CSV, or forward via Zapier / outbound webhook (Growth/Scale). From £149/month. Start a free 14-day trial — no credit card, no briefing call, no waiting.

Start free trial
See pricing Calculate your ROI Sift vs Alto Lead Flow