Switching From ACI for UAD 3.6? Here's what actually changes.

If you're on ACI today, the UAD 3.6 question looks different than it does for most appraisers. First American (ACI's parent) isn't shipping a 3.6 update to your existing desktop workflow — it's moving appraisers onto a new platform entirely: ACI Sky Workbench, a browser-based rebuild that got GSE verification from Fannie Mae and Freddie Mac in June 2026. So the choice was never "stay on ACI or switch." It's "move to First American's new platform, or move somewhere else" — you're re-learning a workflow either way.

I build appraisal software for a living, so weigh the rest of this accordingly. But that's the honest starting point, and it changes how you should think about this decision.

Why "just wait for ACI to update" isn't really the option

Sky Workbench isn't a patch — it's a different product. It's fully cloud-based, built around what First American calls a dynamic workflow, meaning you can start a report at whatever stage makes sense instead of the fixed top-to-bottom sequence older form-fillers force on you, with compliance checks running against GSE requirements as you go instead of at the end. That's a real, meaningful architecture change, not a version bump.

Which means if you've been on ACI's older desktop software, "sticking with what I know" isn't actually available as of the November 2, 2026 mandate. You're learning new software regardless of which vendor you pick. The only real question is whether that vendor is First American by default, or a decision you actually made.

The real reason most people default to the incumbent anyway

Here's the part worth saying plainly: even when the switch to something new is forced, most people still stay with their current vendor's new product rather than shop around. Not because they've evaluated it against alternatives — because it's the path of least friction. Same login, same support number, same billing relationship. Nobody has to make a decision; the decision gets made for them by inertia.

That's a reasonable instinct under a deadline. It's also exactly the moment a vendor is counting on you not comparing options, because you're already mid-migration and comparing feels like extra work you don't have time for. The irony is that this is actually the cheapest moment to compare — you're re-learning a UI no matter what you pick, so the switching cost between "First American's new platform" and "literally any other UAD 3.6 platform" is close to zero. That's not true in a normal year when switching means abandoning a workflow you've had for a decade.

What else appraisers are looking at

Aivre comes up constantly in this conversation — it was the first vendor to get GSE verification for UAD 3.6, which earned it a lot of early trust, and it's offering free access into early 2026 with discounted rates locked in for people who commit early. For small offices doing collaborative work, people describe it as genuinely solid.

It's not without friction. The sketch tool is the most consistent complaint — appraisers describing it as slower than what they're used to, with specific gripes about handling something like an open-to-below on a second floor, and a hotkey layout that takes real relearning time. There's also a data-use term worth reading closely before you commit a firm's workfiles to any platform: some of these newer AI-forward tools reserve the right to use appraiser data to train their models. Whether that bothers you is your call, but it's a term to actually read, not assume either way.

None of that makes Aivre the wrong pick. It means "well-known" and "right for your office" aren't automatically the same thing — worth testing against your own floor plans before you decide, same as any vendor.

Where Property Appraiser Pro fits

I'm not going to tell you PAP is the obvious answer for every office coming off ACI — it's a UAD 3.6 / MISMO 3.6 workfile platform built for small, multi-user offices, and it's genuinely still in beta, which means real rough edges I'm actively fixing, not a finished, polished claim.

What I did build deliberately: the export is checked against the actual official GSE UAD 3.6 specification — enumerations, required fields, the real thing — not a simplified approximation, so a missing required field shows up before you submit, not after a rejection notice. And your workfile data is encrypted; I don't sell it, and I can't read it myself even if I wanted to — I only ever see the name and email needed for account and password resets. That's how the system is built, not a line in a privacy policy nobody reads.

It's free to try in beta, no card required. Since you're already going to spend time learning a new platform before November 2 regardless of which one you pick, the honest move is to put your own workfile into more than one option and see what actually happens, rather than defaulting to whichever vendor sent you a migration email first.