Follow Up Boss API
Follow Up Boss has a free self-serve REST API: any user mints a key from the admin panel, with OAuth 2.0 for multi-tenant partners. Coverage spans people, deals, calls, texts, and webhooks. In May 2025 Zillow-owned FUB removed call recordings and text message contents from the API.
Frequently asked questions
Follow Up Boss scores A on the API Report Card. Follow Up Boss has a free self-serve REST API: any user mints a key from the admin panel, with OAuth 2.0 for multi-tenant partners. Coverage spans people, deals, calls, texts, and webhooks. In May 2025 Zillow-owned FUB removed call recordings and text message contents from the API.
Follow Up Boss has a workable official integration path. Most engineering teams can build against it directly. Open API: self-serve, documented, with SDKs
Follow Up Boss (Follow Up Boss, Inc., a Zillow Group subsidiary as of December 8, 2023) is a U.S. real estate team CRM founded in 2011 by Dan Corkill and Tom Markov that unifies inbound lead capture from 250+ sources (Zillow, Realtor.com, Trulia, Google/Facebook ads, IDX websites, MLS feeds), assignment and round-robin distribution, multichannel follow-up (calls, SMS, email, action plans), pipeline/deal tracking, team coaching and leaderboards, and a built-in power dialer with call recording.
Real Estate (residential brokerage / team CRM). A real estate team leader signs up at followupboss.com, connects lead sources by forwarding lead emails to a Follow Up Boss-issued address (or enabling native Zillow Tech Connect / Realtor.com / IDX integrations), invites their agents, and configures lead-routing rules (round-robin, by zip code, by price point, by source).
High within its niche.
Follow Up Boss holds the system-of-record for a high-GCI real estate team's entire lead-to-close pipeline: every inbound lead and its source attribution (Zillow, Realtor.com, IDX, ads, referrals), every assignment and round-robin event, every call (with timestamps, duration, disposition, and, historically, until May 2025, recordings), every SMS/email (with, historically, message contents), every action-plan touch, every pipeline-stage transition, every appointment, every deal and commission projection, every note and task, every agent's productivity metrics (calls/day, leads/day, conversion rate, leaderboards), and every team's custom fields, smart lists, and automations.
Modern.
Effective May 7, 2025, Zillow-owned Follow Up Boss notified API partners that call recordings and the contents of text messages would no longer be available via API, directly impacting AI assistants (HouseWhisper), conversation-intelligence vendors, and team-coaching tools that built their products around those two payloads. Rate-limit documentation is inconsistent across sources, the official docs page describes a sliding 10-second window with 250/125 caps, while third-party integration guides cite a 1,000-request-per-10-minute cap, leaving partner engineers guessing about real production limits. Full sourced list under Sources below.
Common alternatives include kvCORE (Inside Real Estate), Lofty (formerly Chime), Sierra Interactive, CINC, BoomTown, Real Geeks. Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.