Built for you
Stack55
Builds custom AI software for CRE brokerage, investment, lending and property management firms.
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#2 of 3 Altus Group builders
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Typical build
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Listed
Oct 25, 2026
On HissingKitty
Stack55 vs. Altus Group vs. CoStar vs. Dealpath
Side by side, from reviews and pricing shared on HissingKitty. Each number shows its count.
| Stack55 | Altus Group | CoStar | Dealpath | |
|---|---|---|---|---|
| What it is | Built for you | Software you rent | Software you rent | Software you rent |
| Rating | No reviews yet | No reviews yet | No reviews yet | No reviews yet |
| Cost | Not shared | Custom quote (list price) | About $20,000 (list price, per seat a year, per Titleman's COO) | Custom quote (list price) |
| Time to build | Not shared | Already built | Already built | Already built |
| Learn more | stack55.com → | Altus Group data → | CoStar data → | Dealpath data → |
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Stack55 listed itself on HissingKitty and was approved before going live. Prices are as listed by Stack55. Votes and reviews come from visitors. Methodology