Workday suits large organisations that want HR, finance and IT on one enterprise platform with AI agents, and it serves 11,500+ organisations. ADP suits businesses of almost any size that want payroll first, from RUN for 1 to 49 employees up to Workforce Now for 50 to 1,000+, and it says more than 1,000,000 clients use it. If you're a small or midsized business, start with ADP; if you're an enterprise rebuilding HR and finance together, look at Workday.
These two names come up together because big employers often shortlist both, but they're built for different buyers. I read Workday's home, HCM and payroll pages and ADP's Workforce Now, RUN and home pages.
How Workday and ADP compare on paper
| Workday | ADP | |
|---|---|---|
| Built for | Enterprises: HR, finance and IT | Every size, payroll first |
| Customer count | 11,500+ organisations | More than 1,000,000 clients |
| Small business product | Not on the pages I read | RUN Powered by ADP (1 to 49) |
| Mid to large product | Workday HCM and Payroll | Workforce Now (50 to 1,000+) |
| Global reach | Payroll links across 180+ countries | Services in 140+ countries |
| AI | Sana agents, Payroll Agent | AI flags unusual payroll changes |
| How you buy | Demo-led | Quote-led packages |
The pay data ADP bundles in
Workforce Now includes compensation benchmarking, and ADP says it's powered by monthly pay data from more than 39 million workers across thousands of job titles. For a midsized business setting salaries without a reward team, that dataset is a reason to look at ADP on its own. Workday's pitch is different: its AI sits on HR and finance data together, so its agents can act with the full picture of people, policies and spend.
One small detail explains a lot of searches. Workday's site tells employees there's no public login: you get your company's own sign-in link from HR or IT.
Where Workday is strongest
Workday is built for scale. It sells HR, payroll, finance and IT on one platform, uses Sana AI agents for hiring, payroll and self-service, and says its payroll connects native and partner systems across 180+ countries through live APIs. Workday also says it has been named a Leader in the Gartner Magic Quadrant for Cloud HCM Suites for 10 consecutive years.
Where ADP is strongest
ADP covers the whole range of company sizes. RUN handles payroll for 1 to 49 employees, Workforce Now comes in Select, Plus and Premium packages that add benefits administration and time and attendance, and ADP offers a PEO through TotalSource. It runs payroll, global HCM and outsourcing in more than 140 countries.
For hiring abroad rather than at home, see how Deel compares with Rippling.
What to ask in your HR software demos
- How many employees do you have now, and in three years?
- Do you want finance and HR on the same system?
- Which countries will you run payroll in?
- Do you need salary benchmarks built in?
- Who will run the system day to day: HR, payroll or IT?
For a wider view, my guide to HR software for small businesses lists more options, and this explainer on HRIS roles shows what running these systems involves.
How each one is bought and rated
You won't find a self-serve sign-up on either site. Workday's pages lead to a demo request, and ADP's pages lead to a quote for each package. One detail on ADP's Workforce Now page is worth noting: it shows a 4.4 out of 5 rating from 7,228 reviews on Capterra, GetApp and Software Advice, and it's upfront that those ratings include incentivised reviews.
Smaller firms often weigh ADP against Paychex, covered in my ADP and Paychex comparison.
My advice on Workday or ADP
If you're under a thousand employees and payroll is the job you need done well, start with ADP and ask which package fits your headcount. If you're an enterprise replacing several HR and finance systems at once, put Workday on the shortlist and ask to see its agents working on your own data before you commit.
Want AI doing the heavy lifting in your marketing?
I build the systems that handle the boring 80 percent, so you get your week back. Done properly, with the human kept in.
Do you make HR or payroll software? Tool makers can ask to be considered for a featured place in comparisons like this one.
Frequently asked questions
Is Workday or ADP better for a small business?
ADP. It sells RUN Powered by ADP for businesses with 1 to 49 employees. Workday's pages are aimed at large organisations.
How many companies use Workday and ADP?
Workday says 11,500+ organisations trust it. ADP says more than 1,000,000 clients rely on it.
How do I log in to Workday?
Workday's site says to ask your HR or IT department for your company's unique sign-in page.
Does ADP Workforce Now include salary benchmarks?
Yes. ADP says compensation benchmarking is included, using monthly pay data from more than 39 million workers.
Which runs payroll in more countries?
Workday says its payroll connects systems across 180+ countries. ADP says it provides payroll and HCM services in more than 140 countries.
Do Workday or ADP have a free plan?
Neither lists one. Workday is sold through demos and ADP through quotes for each package.
Does ADP offer a PEO?
Yes. ADP lists ADP TotalSource for PEO and HR outsourcing.
