- Founded
- 1996-01-01 in Boca Raton, Florida, USA
- Headquarters
- Boca Raton, Florida, USA
Cendyn is a B2B hospitality-technology company headquartered in Boca Raton, Florida, that provides cloud software and services for the commercial side of hotels, resorts, and casino properties. Founded in 1996, the company began in hotel web design and digital marketing before evolving into a broader platform spanning guest relationship management, group sales and catering, revenue management, channel distribution, and guest engagement. Its principal products include Cendyn CRM, the GroupSync sales-and-catering suite, the Rainmaker group-revenue-optimization engine, and the RateTiger/eRevMax channel-management line acquired in 2020. Cendyn is privately held, private-equity backed, and competes with vendors such as Amadeus Hospitality, IDeaS, Duetto, and Revinate. The company's relevance to the iGaming and casino industry is indirect but significant: casino-resorts are a core hotel customer segment, and Rainmaker became a named defendant in US class-action antitrust litigation alleging that Atlantic City and Las Vegas casino hotels used its algorithmic pricing software to coordinate room rates. That litigation is the basis for the Yogonet article that first surfaced Cendyn in this context.
Detailed Review
Overview
Cendyn is a US-based hospitality software and services vendor whose platform covers the revenue-generating functions of a hotel: guest database and CRM, group and event sales, group room pricing, digital marketing, and guest communication. It is not a property-management system vendor and not a gambling-technology supplier in the sense of slots, sports betting, or casino-management systems. Its gaming-industry footprint comes from serving casino-resorts on the hotel side, most prominently through Rainmaker, the group-pricing software at the center of US antitrust litigation over algorithmic room-rate coordination in Atlantic City and Las Vegas.
History and Growth
Cendyn was founded in 1996 in South Florida and originally operated as a web-development and digital-marketing firm for hotels. Over roughly two decades it added CRM capabilities and became one of the largest independent hotel-CRM providers, then expanded by acquisition. It acquired Guestfolio, a guest-engagement platform for pre-arrival, in-stay, and post-stay communications, around 2017. In early 2019 it acquired The Rainmaker Group, bringing in Rainmaker24/7, an algorithmic group-revenue-optimization tool that recommended pricing thresholds based on hotel group-booking and rate-negotiation data. In 2020 it acquired eRevMax and its RateTiger channel-management and rate-intelligence platform, adding distribution management. After these deals, Cendyn repositioned itself as an end-to-end hotel growth platform, consolidating its portfolio under brands such as GroupSync and emphasizing AI-driven personalization and predictive group pricing.
Business Model
Cendyn makes money primarily through recurring software subscriptions for its CRM, sales-and-catering, revenue-management, and channel-management products, alongside agency-style digital marketing services for hotels. Its model is aimed at hotel commercial teams rather than IT or property operations, and it positions its integrated suite as a way to capture more direct bookings, optimize group business, and personalize guest communications. The company is privately held and private-equity backed, though specific ownership details were not confirmed during research.
Key Products and Platforms
Cendyn CRM is the company's guest-data platform and marketing-automation hub, unifying guest profiles across properties and powering personalized email, loyalty, and booking campaigns. GroupSync, also known as Cendyn Sales & Catering, provides group sales lead management, event catering sales, and proposal workflow, competing with solutions such as Delphi/Newmarket. Rainmaker, or Rainmaker24/7, is the group-pricing and revenue-management software that advises on group rates and is the central subject of the antitrust litigation. Guestfolio delivers guest-engagement messaging and surveys across the guest journey. RateTiger/eRevMax is a channel manager for online distribution plus rate-shopping and revenue-intelligence tools. Cendyn Digital Marketing is the in-house agency offering SEO, PPC, website optimization, and booking-engine services.
Antitrust Controversy
Cendyn and its Rainmaker subsidiary have been named in US class-action antitrust litigation beginning around 2022–2023, including proceedings in the Northern District of California and the Atlantic City suit against casino operators in New Jersey. Plaintiffs alleged that hotel and casino operators supplied competitively sensitive room-rate, availability, and demand data to Rainmaker's software and used its algorithmically generated recommendations to coordinate rates and inflate room prices. Courts have ruled in stages, dismissing some federal claims on standing grounds while allowing state-law claims to proceed. The Yogonet article cited in this profile reports an appellate decision allowing AI-pricing antitrust claims against Atlantic City casinos to proceed. Cendyn has denied wrongdoing. This litigation is the principal reason the company appears in a gambling-industry news database, framing it as a platform provider to casino-hotels.
Market Position
Cendyn is headquartered in Boca Raton, Florida, with additional offices in Europe and Asia-Pacific. Its headcount is estimated in the 500–1,000 range based on LinkedIn band data, though this figure was not independently verified. Its competitive set includes Amadeus Hospitality, IDeaS, Duetto, Revinate, and Oracle Hospitality. Cendyn's differentiation is the integration of group-sales workflow, group pricing, and guest CRM on one platform, a positioning that made it a natural technology vendor for large group-driven casino resorts in Las Vegas and Atlantic City and, by extension, a party to their pricing litigation.
Key Products
Cendyn CRM
Hotel guest relationship management platform with unified guest profiles, segmentation, marketing automation, and personalization.
GroupSync / Cendyn Sales & Catering
Group sales and event/catering management software for hotel sales teams, covering lead management, proposals, and event workflows.
Rainmaker (Rainmaker24/7)
Algorithmic group-pricing and revenue-management software that recommends group rate thresholds; it is the product at the center of US antitrust litigation over room-rate coordination.
Guestfolio
Guest engagement platform providing pre-arrival, in-stay, and post-stay messaging, plus guest surveys.
RateTiger / eRevMax
Channel manager and rate-shopping/revenue-intelligence tool for online hotel distribution.
Cendyn Digital Marketing
Hotel-focused digital marketing services including SEO, PPC, website and booking-engine optimization, and social media.
Offices & Headcount
750 employees (approx.)
Recent News

Court Revives Antitrust Lawsuit Over AI-Priced Hotel Rooms in Atlantic City
A federal appeals court reinstated a class action alleging Atlantic City casino operators used Cendyn's AI-driven Rainmaker platform to coordinate hotel room rates, creating a circuit split over antitrust liability for AI pricing software.
2026-07-31