Home inspection · refereed
ISN (Inspection Support Network) vs Horizon by Carson Dunlop
One vendor has published a page on this pair and the other has published nothing at all. As with several matchups in this category, the two products do different jobs — which makes the existing comparison less useful than it looks.
Who wrote this, and what we sell
We make ReportWalk, a competing inspection app. We are not one of these two products and neither company has any relationship with us. Our own tool appears once, at the bottom.
The short answer
ISN (Inspection Support Network)
Choose ISN if the bottleneck is running the business: scheduling, agent relationships, invoicing and the administration that grows with every inspector you add.
Horizon by Carson Dunlop
Choose Horizon if the bottleneck is the report, and particularly if you trained through Carson Dunlop and want software that shares that vocabulary.
As with ISN versus any report writer, the real question for a solo inspector is whether you need two subscriptions at all.
Who actually switched, and why
We found no record of anyone moving between ISN and Horizon in either direction. Horizon's documented departures go elsewhere — two inspectors moved to Spectora, in January 2025 and August 2026. We are reporting the absence rather than substituting adjacent data for it.
No migration evidence found
We could not find a single named, dated record of anyone moving between these two products in either direction. We are saying so rather than implying a flow that we cannot evidence.
Where they genuinely differ
They are not competing for the same budget line
ISN is scheduling and back-office operations, priced per inspection. Horizon is a report writer with Carson Dunlop's inspection education behind it.
Firms that run both are not being indecisive. Firms choosing one are usually deciding which problem is more expensive right now.
What we could not price
We did not capture current pricing for Horizon from Carson Dunlop's own page with a date, so no figure appears here. ISN prices per inspection rather than per seat, and raised both its minimum monthly fee and transaction fees in Q1 2024 by approximately 20% according to its parent company's own announcement.
What each is honestly better at
ISN
The operational half of an inspection business, at a depth a report writer does not attempt. For a firm with several inspectors, agent relationships and recurring scheduling are the constraint, and this is what solves it.
Horizon
Inspection knowledge built into the report structure. It comes from a training organisation rather than a software company, and for inspectors who learned that way it fits how they already think about a building.
What we could not verify
- Any migration between these two products.
- Horizon's current pricing and release cadence — we could find no public release notes, which limits what we can fairly say about its development pace.
- A search caveat: 'Horizon' collides with dozens of unrelated products. Include 'Carson Dunlop' in any query.
- This is a low-volume comparison and we have written it to complete the Horizon cluster rather than because we expect significant traffic.
- Reddit was unreachable in every research session.
If neither fits — a third shape of tool
If you are paying for operations software and reporting software and only use half of each, the reporting half is the easier one to replace. ReportWalk produces the finished report on site and has no scheduling or agent portal, which makes it a complement to ISN rather than a rival to it.
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Last updated 15 September 2026