G2 Vendor Directory

CoStar Group

#5 in Multiple Listing Service (MLS)

Atlanta, US

6

Products on G2

193

Total reviews

3.7

Avg. star rating

  • Apartments.com ranks #5 in Multiple Listing Service (MLS).
  • CoStar Group's 6 products span 6 categories on G2.
  • Small Business is the largest segment among reviewers, at 47.3%.

Traffic & LLM citations

Monthly G2.com page views and citations by AI answer engines, summed across CoStar Group's products.

Page views and citations · CoStar Group

Source: G2 review data

Winning from

Based on reviewers who said they switched from another vendor's product.

1

Buildium

1 switched

Losing to

Based on reviewers of other products who said they switched from CoStar Group.

1

Innago

32 switched
2

Crexi

21 switched
3

TenantCloud

9 switched
4

RentRedi

4 switched
5

DoorLoop

3 switched

Key stats

—

#5

6

Small Business

1986

12,642

Atlanta, US

$758.8K

Adoption by company size

SegmentShare of reviews
Small Business47.3%
Mid-Market32.4%
Enterprise20.2%

Quarterly history

QuarterTotal reviewsAvg. rating
2026 Q115.0