CDK vs Reynolds: Dealer Group Adoption Trends in 2026

The DMS duopoly of CDK Global and Reynolds and Reynolds has defined dealership technology for decades. Conventional wisdom says dealers pick one and stick with it — Reynolds for the loyalists, CDK for everyone else, and never the two shall meet. But the data from 87 franchise dealer groups tracked by The State of Automotive tells a more nuanced story.

CDK Global appears in 66 of 87 groups with DMS data — 75.9%. Reynolds and Reynolds appears in 40 groups — 46.0%. On the surface, this looks like a competitive duopoly. But dig one layer deeper and the picture changes completely.

Zero groups run Reynolds as their sole DMS. Not one. Every single one of the 40 groups using Reynolds also has CDK somewhere in their portfolio. Reynolds is never the platform a group standardizes on — it's always the legacy system that came with an acquisition, the secondary platform running alongside CDK.

The 20 groups that run both platforms include some of the most acquisitive names in the mid-market: Morgan Automotive Group (45 rooftops), Herb Chambers Companies (58 rooftops), Serra Automotive (32 rooftops), Greenway Automotive Group (30 rooftops), Napleton Automotive Group (28 rooftops), Ed Morse Automotive Group (22 rooftops), and Sheehy Auto Stores (19 rooftops). These are groups that have grown by buying dealerships, and each acquisition brings a DMS contract that may or may not match the parent group's standard.

The economics of dual-DMS are brutal. Running two DMS platforms means two sets of training, two integration frameworks, two support contracts, and consolidated reporting that requires middleware or manual reconciliation. A group with 20 rooftops split between CDK and Reynolds might spend an extra $200,000-400,000 annually on redundant licenses, training, and integration labor compared to a fully standardized group. And yet 23% of groups in the dataset choose to live with this rather than force migration.

Why don't they just migrate? DMS migration costs $50,000-150,000 per rooftop and takes 6-18 months. During migration, the store runs on two systems simultaneously, data integrity is at risk, and staff productivity drops. For a group acquiring 1-2 stores per year, the math often favors running dual systems temporarily — or indefinitely — rather than disrupting operations for a migration that might not pay back for 3-5 years.

The CRM layer adds complexity. Of the 101 CRM entries in the database, VinSolutions (a Cox Automotive product) leads with 38 groups, followed by DealerSocket with 30, eLead (owned by CDK) with 18, and Salesforce Automotive Cloud with 11. Groups running CDK for DMS often pair it with VinSolutions for CRM — a cross-ecosystem combination. Groups running both CDK and Reynolds for DMS face an even harder CRM decision: standardize on one CRM across both DMS platforms (requiring dual integration) or run separate CRMs for each DMS (losing consolidated customer data).

The Reynolds loyalty narrative needs updating. Reynolds has historically been known for deeply loyal dealers and sticky long-term contracts. But the data suggests Reynolds' position in multi-rooftop groups is eroding. When a group grows, it standardizes on CDK. When it acquires a Reynolds store, it leaves Reynolds in place — for now. The direction of travel is clear: Reynolds is the legacy layer, CDK is the standard, and groups that use only Reynolds don't exist in this dataset.

For a dealer group evaluating DMS options, the data points to three realities. First, CDK is the industry's de facto standard for multi-rooftop groups — 75.9% penetration speaks for itself. Second, if your growth strategy includes acquisitions, you will face dual-DMS complexity — plan for it in your integration budget. Third, Reynolds is a viable platform, but choosing it as your sole DMS would make you unique among the groups tracked — no one else has done it.

Data sourced from The State of Automotive's DealerGroupTechStack database, tracking 402 technology vendor relationships across 219 franchise dealer groups. DMS data is available for 87 groups as of June 2026.