Nesti and Stitch both help UK agencies answer enquiries faster, and both appear in conversations about AI in estate agency. They start from different places. Nesti is an AI assistant for agents. Stitch is a WhatsApp business communication platform, with a shared team inbox at its centre and AI layered on top.

This guide compares the two so you can decide which matches the way your branches work. To see Stitch running against your own enquiries, book a demo.

What does Nesti do?

Nesti is a London AI company led by co-founder and chief executive Morgan Edmondson. In 2025 it launched Nesti.Chat, an AI assistant for estate and letting agents that the company says handles enquiries, qualifies leads, books viewings and spots referral opportunities.

Nesti lists integrations with Alto and Street, which means it can work alongside two of the most widely used UK property CRMs. The company has described its product as an early step towards a fully conversational platform for estate agents.

What does Stitch do?

Stitch is a UK WhatsApp Business Platform provider and Meta Business Partner. We built msgboxx, a WhatsApp team inbox on the official WhatsApp Cloud API. It works as a web app, a Chrome extension that overlays property CRMs, and a mobile app.

Agencies use Stitch to move WhatsApp off negotiators' personal phones and into a business-owned inbox. Each conversation has an owner, managers can see every branch, and chat histories can be exported. On top of that, AI persona bots answer first, qualify and then pass to a person using rules the agency sets. Read more in our guide to designing WhatsApp AI persona bots that sound human.

How are they different in practice?

The simplest way to see the difference is to ask what happens after the first reply.

• With an AI-first assistant, the main value is in capturing and qualifying the enquiry. The question to ask is where the conversation lives once a negotiator gets involved.
• With Stitch, the AI reply and the human follow-up happen in the same WhatsApp thread, in the same inbox, linked to the CRM record. The applicant never switches channel.

That continuity matters for lettings and property management, where one tenant or landlord may message dozens of times over a tenancy.

How do they compare on CRM integration?

Both tools connect to UK property CRMs. Nesti lists Alto and Street. Stitch connects to Reapit, Alto, Rex, Street, Jupix and AgentOS. Our guides cover the detail for Alto and Rex and Jupix and AgentOS.

When you compare, ask whether messages are logged against the contact record, whether negotiators can start a WhatsApp chat from the CRM, and what happens when a contact has two numbers.

Which handles WhatsApp compliance better?

Ask any provider how WhatsApp is connected. Stitch uses the official WhatsApp Business Platform, so the business owns the number, the account and the conversation history. Administrators can export chats to CSV for audits or subject access requests.

For agencies currently relying on personal phones, the risk is less about the AI and more about record keeping. Our article on the real risks of using WhatsApp for business sets out what directors are exposed to.

Can you use both?

Some agencies run an AI assistant on the website and a WhatsApp platform for ongoing conversations. If you do, map out who replies to what, so applicants do not receive two different answers. In most cases it is simpler to have the AI and the people working in the same inbox, which is how Stitch is designed.

Which should you shortlist?

Shortlist Nesti if your priority is an AI receptionist for new enquiries and you use Alto or Street. Shortlist Stitch if you want WhatsApp run as a company channel across sales, lettings and property management, with AI, broadcasts and CRM-linked messaging in one place.

Either way, test with real enquiries. Book a Stitch demo and we will run your own scenarios live.