B2B
Past demos, cold replies and stalled deals
SaaS, agencies, recruitment and other B2B services with a CRM full of past demos, cold replies and stalled deals. Re-engaged by email and SMS, plus LinkedIn where you're already connected.
Database reactivation for UK businesses
An always-on AI system that finds every lead that's gone quiet and re-engages them by SMS, email, WhatsApp and voice, until they book or opt out. No more ad spend required.
Works with your existing CRM. Only opted-in contacts are ever contacted.

562
Responses in week one
15,000
Dormant leads reactivated
0
Manual follow-up from the team
The problem
Every business that runs ads, content or lead magnets builds up the same thing: a CRM full of people who were interested once and never converted.
A slow first reply. Follow-up that stopped after a few attempts. A rep who rightly moved on to newer leads. A lead who got busy and forgot what they enquired about. None of that means they've stopped being in the market.
Putting a rep on the dormant list burns your best people's time. One-off email blasts get a handful of replies and a wave of unsubscribes. So the list keeps growing, and new lead costs keep rising.
That's the leaky bucket. Reactivation plugs it.
How it works
We connect to your CRM and run a standing filter that finds every opted-in contact who's been inactive for 60 days or more. Unsubscribed contacts are excluded permanently.
We pull the original reason each lead is in your database, a past enquiry, a demo, a lead magnet or an abandoned booking, so every message references something real.
Each lead gets a simple, personal message, not a pitch. Something like: "Hey Sarah, is this the same Sarah who asked about a quote a few weeks ago?"
SMS and email for B2B, plus LinkedIn where you're already connected. WhatsApp, SMS and Instagram for B2C.
The AI holds a real back-and-forth and either books the appointment itself or hands the conversation to your team the moment intent turns positive.
When a conversation shows real interest but goes quiet, an outbound voice call picks it up and closes it live.
Always on
Most reactivation is a single blast against today's list. Ours runs continuously. Every lead that goes quiet from now on is caught automatically and worked, so your database never fills back up with dead leads.
B2B
SaaS, agencies, recruitment and other B2B services with a CRM full of past demos, cold replies and stalled deals. Re-engaged by email and SMS, plus LinkedIn where you're already connected.
B2C
Dental, aesthetics, home services and other high-ticket consumer businesses with enquiries that never booked. Re-engaged by WhatsApp, SMS, Instagram and voice.
Data protection
We only ever contact opted-in leads. Anyone unsubscribed or opted out is filtered before enrolment and never re-added. Your data stays in your CRM: we don't copy it elsewhere, sell insight from it or use it for anyone else. Access is limited to the fields needed to run the campaign, over encrypted connections, with every action logged back to your CRM for a full audit trail.
The alternative
Messages
One-off blast or rep on the list
One generic message to everyone
Autonomous Stack reactivation
Personal, based on why each lead is there
Conversation
One-off blast or rep on the list
Replies sit in an inbox
Autonomous Stack reactivation
AI replies, qualifies and books
Channels
One-off blast or rep on the list
Usually just email
Autonomous Stack reactivation
SMS, email, WhatsApp, Instagram, LinkedIn, voice
Follow-up
One-off blast or rep on the list
Stops after a few attempts
Autonomous Stack reactivation
Continues until they book or opt out
New dormant leads
One-off blast or rep on the list
Ignored until the next blast
Autonomous Stack reactivation
Caught automatically, forever
Team time
One-off blast or rep on the list
Hours of rep time
Autonomous Stack reactivation
Your team only speaks to interested leads
Results

AssignX · SaaS and agency
AssignX had a database of around 15,000 leads built up across different campaigns, with no consistent way of re-engaging them. We launched an evergreen reactivation campaign for each funnel, with every lead getting a message based on where they originally came from. The agent picked up every reply, qualified it and booked the ones ready to talk.
562 responses in the first week, with no manual follow-up from the team.
"We'd built up a big database and knew some of our old leads would be gold. Replies started coming in the first week of the reactivation, then the agent handled everything until they were booked."
What's included