Integration Partner · Marketing/ILS

RESI + Fortress OS

Property websites, inventory-driven advertising and lease-up marketing on one platform.

Updated May 16, 2026 · 3 min read

What is the RESI + Fortress OS integration?

Resi is a multifamily marketing platform that runs property websites, digital advertising and lease-up campaigns from one place. Paid search and social campaigns read your unit inventory, so the ads and landing pages reflect what you have available rather than what you had last month.

Key takeaways

Paid search and social campaigns are driven by live unit inventory.
Websites, advertising and landing pages run on one platform instead of three vendors.
Marketing reporting sits next to the campaigns it measures.

How does RESI work with Fortress OS?

Fortress OS sits underneath your stack as the operating layer. When something changes in RESI, Fortress picks it up and pushes it to the other systems that care. No double entry. No end-of-month reconciling. No spreadsheets stitching things together.

What data flows between the two?

The exact fields depend on the marketing/ils use case. The goal is simple: both systems show the same truth. Records, statuses, and key events stay in sync. Your team is not the human glue between them.

Who handles the setup?

Our integrations team handles documentation exchange, API keys, and end-to-end testing. Most RESI connections go live in a few weeks. You can request a setup any time.

Why should you connect RESI to Fortress OS?

Most operators buy the website from one vendor, the paid search from another, and the landing pages from whoever is free. Running them together means the ad, the page and the availability agree, so a renter who clicks lands on a unit you can still lease them.

What changes once you connect RESI?

Same marketing/ils tool. Different day-to-day for your team.

Daily task	Without the integration	With Fortress OS + RESI
Keeping records in sync	Copy-paste between tabs, hope you got the numbers right.	Records match across both systems on their own.
End-of-month reconciling	Spreadsheet exports, manual cleanup, late nights.	Numbers already line up. Close the month, go home.
Onboarding new properties	Manual setup in RESI and every other system.	Fortress provisions the connection so new sites pick it up.
Answering “what’s the truth?”	Open three tabs, compare, guess which one is current.	One source of truth, kept fresh by Fortress.

Frequently asked questions

Quick answers about how RESI and Fortress OS work together. Don't see your question? Ask us →

What does Resi cover?

Property websites, digital advertising, custom landing pages and lease-up marketing, delivered as one platform on one contract.

What does inventory-driven advertising mean?

The paid search and social campaigns read your available units, so spend follows the units you need to lease.

Does Resi connect to other systems?

Yes. Resi connects to property management systems, CRMs and self-guided tour tools alongside the marketing platform.