At a glance
Cloud rent vs local-first ownership
Use this when you are evaluating a Follow Up Boss alternative for solo or small-team real estate — especially if per-seat SaaS and vendor-hosted databases feel like renting your pipeline.
| Dimension | Follow Up Boss | Sovereign.OS |
|---|---|---|
| Where data lives | Vendor-hosted cloud CRM | Encrypted vault on your Windows PC |
| Pricing model | $69/mo (solo) · $499/mo (6 users) · $1,000+/mo (unlimited) | Buy once — Core $599 · Full Suite $1,299 |
| Core strength | Industry-leading automated follow-up sequences; seamless Zillow Flex integration; clean mobile UX; 200+ lead-source integrations out of the box. | Local-first OS — CRM + CMA + deal tools + PM/commercial workspaces |
| Known weakness | No CMA, investment analysis, or valuation tools; Zillow ownership raises data-sharing concerns; steep per-seat escalation; no offline mode; limited local intelligence. | Windows desktop home base — not a cloud-native multi-device CRM clone |
| CMA / investment tools | Typically outside the CRM | Built in (CMA Studio, deal economics; commercial add-on/suite) |
| Mobile | Full cloud mobile CRM | On-the-Go companion after desktop pairing — field jobs, not a second cloud SOR |
| Ownership posture | SaaS subscription; Zillow-owned since 2023 | You hold the vault — we do not pool your book for resale |
| Best fit | Teams optimized for cloud multi-device CRM + lead marketplaces | Agents/operators who want Windows home base + buy-once license |
FUB pricing and feature claims change — acquired by Zillow in 2023; data-sharing implications for teams using Zillow Flex. Confirm on followupboss.com before you decide. Sovereign pricing is listed on our pricing section.
Trade-offs
What FUB still wins — and where Sovereign is stronger
Follow Up Boss still wins when you need a polished cloud-native mobile CRM, deep lead-source integrations out of the box, and a team that lives entirely in browser/app SaaS. That is a legitimate product for many brokerages.
Sovereign.OS is stronger when you want a local-first CRM for real estate: data on your machine, one-time license instead of per-seat rent, CMA and deal tooling in the same Windows app, and optional property-management / commercial workspaces without stacking another SaaS bill.
We do not claim feature parity with every FUB automation. We claim a different architecture: desktop as source of truth, phone companion for the field, buy-once economics.
Your data is not the product.
— Sovereign.OS
Discovery
Questions to ask before you renew Follow Up Boss
Use these in a Monday huddle or renewal conversation — they surface where Zillow ownership and per-seat rent actually hurt your workflow.
- How comfortable are you sharing your lead database with Zillow's marketplace team?
- Do clients ever notice their contact details appearing on Zillow after you capture them?
- When you're at a showing with spotty signal, can you still access your full pipeline?
- How are you running CMAs today — does Follow Up Boss help with that, or are you outside the platform?
- What happens to your business continuity if Zillow changes the Flex program terms?
Sources: Follow Up Boss pricing · Zillow acquires FUB — Inman
FAQ
Common questions about switching from Follow Up Boss
Is Sovereign.OS a Follow Up Boss alternative?
Yes — for ownership-first agents, with honest limits. FUB leads on cloud mobile and integrations. Sovereign leads on local custody, buy-once pricing, and a broader real estate OS on Windows.
How does pricing compare?
FUB is typically per-seat monthly (confirm current plans). Sovereign is Core $599 or Full Suite $1,299 one-time, plus optional Relay ~$14/mo. Try Full Suite for $1 / 14 days, or 3 days free with no card — no automatic post-trial charge.
Who should stay on Follow Up Boss?
Teams that need fully cloud-native multi-device CRM and marketplace-style lead integrations, and are fine with vendor-hosted data and SaaS seats. Choose Sovereign if the Windows vault and buy-once model matter more.
More CRM comparisons
See also our honest pages for kvCORE, Lofty, and Sierra Interactive.
Try the agent OS
Seven days of Full Suite for a dollar.
Install the Windows desktop CRM, run your pipeline locally, then pair On-the-Go for the field. No per-door meter after trial.