Vs

CoStar vs. Occupier: Which lease administration platform is right for you?

CoStar Real Estate Manager is a broad real estate platform built around market data and enterprise integrations. Occupier is built for commercial tenants who want something simpler. Real estate and finance teams manage leases and ASC 842 accounting in one place, and they can add fields, build reports and adjust alerts on their own.

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What's the difference between
CoStar and Occupier?

CoStar
Occupier
Costar

A new field or report means submitting a request and waiting.

Occupier

Add custom fields, saved views and scheduled reports yourself.

Costar

A broad platform with more modules than most tenant teams use.

Occupier

A simpler platform focused on leases and lease accounting. Easy for teams to learn.

Costar

Custom data doesn’t always carry through to accounting, so finance cleans it up by hand.

Occupier

Enter it once. Lease changes flow straight into your ASC 842 and IFRS 16 schedules.

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"Occupier makes lease management simple, easy, and reduces the time it takes to manage the leases. I highly recommend Occupier to colleagues with large lease portfolios."  
Suzanne Tobin
EVP and CFO, Volunteers of America
100+
Leases managed
Read Suzanne's Story

Switching from CoStar

Bring your CoStar data with you. We clean it up on the way in, so both teams start with leases they can trust.

Managed Onboarding
  • Accounting is ready at go-live. Schedules, journal entries and disclosure reports are set up during onboarding, with an in-house CPA to answer questions.
  • We move the data. Our team brings your leases over from CoStar exports, PDFs and spreadsheets, re-abstracts them, and a person reviews every lease before it goes live.
  • Most teams go live in 4 to 6 weeks. We migrate your leases and the lease history you choose to bring over.
Why occupier

Why teams choose Occupier

database
One connected system
When a lease is amended, accounting updates automatically. No duplicate entry, no reconciliation risk.
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Data you can trust
Every lease is reviewed by our in-house team before it reaches you. AI accelerates it. Humans verify it.
finance
Compliance built in
Full ASC 842 and IFRS 16 support, including amortization schedules, journal entries, and disclosures.
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A real person, every time
Every account gets a dedicated account manager and in-house CPA. Not a chatbot.
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Your full lease lifecycle
From deal management through execution through accounting. One platform, no handoffs
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ERP integration included
Journal entries flow directly to your accounting system. No manual uploads, no formatting workarounds.
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Occupier Lease Management

Ready to get your portfolio under control?

See how Occupier helps multi-location tenants stop missing critical dates, eliminate compliance surprises, and get instant visibility into portfolio costs.
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Take a Free Tour
Boston HQ
Size:
15,000 sq ft
Renewal options:
90 days notice
Lease expiration:
March 2026
Status:
Action required
Amend Lease
Set Alert

FAQ

Occupier vs CoStar: which is better for commercial tenants?
CoStar is a broad real estate platform built around market data and enterprise integrations. Occupier is built for commercial tenants who want lease administration and ASC 842 accounting in one platform that’s easy to use. Real estate and finance work from the same lease record, a person checks every lease, and most teams go live in 4 to 6 weeks.
Why do teams choose Occupier over CoStar?
Teams choose Occupier when they want a simpler platform they can run themselves. Real estate and finance teams add custom fields, save report views and schedule exports without a support ticket. Lease changes flow straight into ASC 842 and IFRS 16 schedules, and every account has a dedicated account manager and an in-house CPA.
Can we add custom fields and reports ourselves?
Yes, on select tiers, your team can add custom fields, save report views, schedule exports and set alerts without a support ticket or a paid project. Custom fields carry through to accounting, so finance sees the same structure real estate set up.
Does Occupier include market data like CoStar?
No. Occupier focuses on the leases you hold: dates, rent, clauses, obligations and accounting. Teams that need market comparables usually pair Occupier with a separate market data source.

Last updated: October 28, 2026