Build the listings, the agent CRM, and the integrations brokers actually use.
Listings + search, agent CRMs, lead capture, e-signature, mortgage and MLS integrations. The software the brokerage runs on, built to scale beyond the franchise template. Built end to end, and you own the code.
The patterns we ship for PropTech teams
PropTech software lives between four constituencies (agents, buyers, sellers, brokerage ops) and every transaction touches all four. Here are the patterns we've shipped before.
Listings + faceted search
Map + list views, saved searches, alerts. Elasticsearch or Typesense underneath, debounced filters, indexable detail pages for SEO.
Agent CRM + lead routing
Round-robin or scoring-based routing, activity timelines, SMS + email follow-up, calendar integrations. The CRM agents actually log into.
Document e-signature flows
DocuSign, Dropbox Sign, or custom. Field positioning, signing order, audit trail, status webhooks. The closing without the printer.
MLS + IDX integrations
RETS, RESO Web API, MLS-specific syndication feeds. Normalised into one schema, refreshed continuously, search-ready.
Mortgage tech integrations
Lender APIs, rate engines, pre-approval flows, AUS submission. The mortgage half of the transaction wired in.
Operator console
Listings, agents, transactions, commissions, payouts. The internal software the brokerage owner actually runs the business from.
Recent work, built and shipped.
Four featured projects Stacklane delivered end to end. Engineering, design, and brand on one cadence, with no internal hires required.
Frequently Asked Questions
Can you build listings with fast faceted search?
Yes. We build listing pages and faceted search (price, location, beds, filters) that stay fast at scale. You own the code, so the search that drives your leads is not rented from a portal.
Can you integrate MLS and IDX feeds?
Yes, we build MLS and IDX integrations and keep listings in sync, including the format quirks each feed brings. We build it and run it, so brokers get current listings without manual work.
We need an agent CRM with lead routing. Can you build that?
Yes. We build the agent CRM, lead capture, and routing rules that send the right lead to the right agent. It sits in an operator console so your team can manage agents and pipelines in one place.
Can you build e-signature and mortgage flows?
Yes, we build e-signature flows for offers and contracts and integrate mortgage and lending steps into the process. Because it is a subscription, we add these flows as your deals require and you can pause between them.
Stacklane is one of the best software teams we've worked with. We've thrown every kind of project at them and they deliver every time.
Let's ship the agent CRM and the listings stack.
Stacklane builds listings, agent CRMs, lead routing, e-signature, and mortgage + MLS integrations on one continuous cadence.
Patterns we ship