The Glassdoor Test: What Your ERP Partner's Employees Are Saying Behind Closed Doors

When you're evaluating an ERP implementation partner, the first thing most people do is check Google reviews. Makes sense. You want to see what other clients thought. But there's a second dataset that almost nobody checks - and it might be more useful than the client reviews.

Glassdoor.

Specifically, what the partner's own employees are saying about working there. Because if the consultants are miserable, overworked, and dealing with bad management, that's going to show up in your project eventually. Maybe not in week one. But by month four, when your project lead quietly gets replaced and nobody explains why, you'll wish you'd looked.

The Data

I recently dug into this across 345 Microsoft Dynamics 365 partners, comparing their Google Maps ratings (client satisfaction) against their Glassdoor ratings (employee satisfaction). The assumption going in was that these two numbers would track together - happy employees deliver better work, which creates happy clients, which creates better reviews.

That assumption was wrong.

The correlation between client ratings and employee ratings was just 0.19. For context, 1.0 would be perfect correlation and 0.0 would be none at all. A 0.19 means the relationship exists but it's barely there. Client satisfaction and employee satisfaction are measuring two very different things.

Only 35% of the partners in the dataset scored well on both platforms. The other 65% had a gap - sometimes a big one - between how clients rated them and how their own people rated them.

Four Types of Partners

When you plot the data, four groups emerge pretty clearly.

The first group - about 35% of partners - scores well on both sides. Happy clients, happy employees. These firms averaged around 224 employees. Smaller, tighter operations where the people doing the work are the same people who sold you on the project.

The second group - 17% - has happy employees but lower client scores. Interesting firms. Good place to work, apparently, but the client outcomes don't match. Could be a skills issue, a scoping issue, or just growing pains where the team is solid but the methodology isn't mature yet.

The third group - 26% - is the one that should make you nervous if you don't look past Google reviews. Happy clients, lower employee satisfaction. These firms averaged nearly 5,000 employees. Big consulting shops that deliver polished client experiences while grinding through consultants internally. The work gets done, but the turnover underneath means you might lose your project team mid-implementation.

The fourth group - 21% - is struggling on both fronts. Low client satisfaction, low employee satisfaction. These firms averaged over 5,700 employees. And the single biggest theme in their Glassdoor reviews? Management complaints - 43 mentions of negative management patterns, nearly double any other complaint category.

Why This Matters for Buyers

The management complaints one is the real takeaway. Bad management inside a partner firm doesn't stay inside the firm. It creates consultant turnover. Turnover creates project disruption. Project disruption creates budget overruns and timeline delays.

You can't control how your implementation partner manages their people. But you can look for the warning signs before you sign a contract.

Check their Glassdoor page. Not for the overall star rating - those are easy to game with a few prompted reviews. Read the actual reviews from the last 12 months. Look for patterns. If three different people mention "unrealistic utilization targets" or "constant turnover on project teams" or "leadership doesn't care about work-life balance," that's data.

Then cross-reference it with their Google reviews. If the client reviews are glowing but the employee reviews are rough, you're probably looking at a firm that can maintain a good front during the sales process but has structural issues that'll surface during a long implementation.

The Size Factor

One thing worth noting - firm size correlates strongly with lower Glassdoor scores. The partners with the highest employee satisfaction averaged 224 employees. The ones with the lowest averaged over 5,000.

That doesn't mean all large firms are bad places to work. But larger firms generate more reviews across more diverse employee populations, and the ratings tend to normalize downward as a result. A 3.8 on Glassdoor from a 5,000-person firm might represent the same actual employee experience as a 4.2 from a 200-person firm. Scale creates noise.

The practical takeaway: don't compare Glassdoor scores across wildly different firm sizes. Compare within the same size category.

The Bottom Line

Google reviews tell you what happened on the client side. Glassdoor reviews tell you what's happening on the inside. Neither one gives you the full picture alone, but together they're one of the most underused tools in ERP partner due diligence.

It takes ten minutes to check both before your next vendor call. That's a pretty good return on time.

The full dataset and methodology - including the four-quadrant breakdown and size-adjusted analysis - is published at https://topdynamicspartners.com/insights/dynamics-365-client-reviews-vs-employee-reviews.