Check vs Paychex Flex (2026): which should you pick?

Pick Check if

• Fits if you run a software platform and want to offer US payroll inside it
• Works for engineering teams that want payroll as an API

Look elsewhere if

• Not for you if you only want to run payroll for your own staff
• Skip it if you are outside the US, as its pages describe US payroll terms only
• Skip it if you want to see a price, as none is published and /pricing is a dead page
• Skip it if you want a free plan or trial, as none is listed

Pick Paychex Flex if

• Fits if you want Paychex handling federal, state and local payroll taxes
• Works for teams that plan to add 401(k), benefits or a PEO later

Look elsewhere if

• Skip it if you want a price on the page before booking a call
• Tight if you want phone support on a lower package, as phone and email agents are add-ons
• Not for you if you pay people outside the US, since the pages read cover US payroll only
• Watch out: time and attendance, applicant tracking, state unemployment service and job costing are add-ons
• Watch out: the fee-free offer to April 2027 needs a one-year contract for Foundations or above

Check

• No pricing is published; the site directs visitors to contact the team, and /pricing returns a not-found page.
• Check sells to platforms, so a business that only needs payroll for its own staff would use a product built on Check, not Check itself.
• The pages read describe US payroll terms such as tax filing and 401(k); other countries are not mentioned.
• Payments are handled by Check Payments LLC, shown in the site footer with an NMLS number.

Paychex Flex

• No prices are published: Basic, Foundations, Advanced and Complete are each quoted after a form or a sales call.
• Time and attendance, applicant tracking, state unemployment service and job costing are add-ons on some or all packages.
• Online chat support comes with every package; phone and email agents and a dedicated payroll specialist are add-ons on the lower packages.
• The pages read describe US payroll only: federal, state and local tax filing, and W-2 and 1099 forms.

Check

Embedded payroll

Software companies build a native payroll product on Check's infrastructure instead of writing payroll themselves.

Tax calculation and filing

Handles tax calculation, tax filing and tax notices, according to the product pages.

Money movement

Includes real-time payments, voids, deductions and garnishments, plus custom pay rates.

Configurable experience

Partners can configure the payroll experience and choose how much of the onboarding and support Check handles.

Benefits and extras

Health benefits, 401(k), workers' comp and accounting connections can be added beside payroll.

Credit, risk and fraud tools

The platform menu lists credit, risk and fraud protection among the services it provides to partners.

Paychex Flex

Unlimited payroll runs

Enter hours, salaries, bonuses and time off, then pay by direct deposit, paper check, pay card or tip disbursement, from a computer or the app.

Taxpay tax administration

Calculates, pays and files federal, state and local payroll taxes with the right agencies, and provides W-2s and 1099s online.

AI checks before payday

Automations flag missing time punches and other issues before payroll is due, check employee data and handle timesheet entries.

HR and compliance tools

Depending on the package: OSHA and EEO-1 compliance reports, document management with e-signatures, HR approval workflows and a custom employee handbook.

Employee self-service and Perks

Staff see pay stubs and W-2s in a 24/7 portal and app, and Paychex Flex Perks adds discounts and earned wage access at no extra cost.

Accounting and time integrations

Connects to QuickBooks, Xero, Sage Intacct and NetSuite for accounting, and to scheduling apps such as When I Work and 7shifts.

Check

Pricing could not be confirmed. See checkhq.com.

Paychex Flex

Pricing could not be confirmed. See paychex.com.

Check

No public discounts listed.

Paychex Flex

• Other savings

  Free payroll until April 2027

  New clients with 1 to 250 employees who sign a one-year agreement for Foundations, Advanced or Complete between October 12 and 31, 2026 pay no payroll fees through April 2027.