How to connect multiple payroll providers, HR systems and compensation data

Four ways to connect payroll, HR and compensation data

Companies that need one view of HR, compensation and payroll data usually choose between four approaches. Each approach solves a different problem.

1. Unified HR and payroll APIs

Finch, Merge and Kombo give a software company one API that reaches many HR and payroll systems through a common data model. Unified APIs suit software vendors that add HR integrations to their own product. Developers write the code, and coverage depends on each vendor’s integration list. Compare unified HR APIs with datascalehr.

2. Payroll control platforms

Payslip and Payzaar give a global payroll team one place to run the payroll process across in-country providers, with workflows, approvals, validation steps and reporting. Control platforms manage the process and depend on clean data underneath. Compare payroll control platforms with datascalehr.

3. One vendor for HR and payroll

Some companies move HR and payroll onto one vendor’s platform. Consolidation removes integrations between that vendor’s own modules, but usually means replacing local payroll providers in every country the vendor covers, and keeping separate arrangements where the vendor has no coverage.

4. A context layer

A context layer keeps your HR system, your compensation data and your local payroll providers, and connects all of them through one governed record. datascalehr reads each system in its own format, maps each field with KMod™, validates each record before the payroll run, and keeps the origin and lineage of every value. Companies on Workday can also use the native datascalehr connector for Workday Global Payroll Connect, which sends field-level changes to any local payroll provider.

Why payroll data is hard to connect

Every country runs payroll differently, with different rules, different formats and different providers. A multinational with one HR system and 20 local providers has 20 different integrations to build and maintain, and each one breaks when a rule or a file format changes. A payroll provider serving many clients faces the same problem in reverse: every new client arrives from a different HR system.

Field names are the easy part. Payroll meaning sits in the details:

• Effective dating. A salary increase entered today can apply from last month.
• Retroactive changes. A correction to a closed period has to reach the payroll that recalculates the period.
• Year-to-date formats. Providers report year-to-date values in different formats and against different tax years.
• Vertical and horizontal structures. Some systems send one row per pay element, and others send one row per employee with a column for each element.
• Local fields. Each country’s payroll needs fields that a global HR system does not hold, which today live in spreadsheets and provider portals.

Compensation data adds another layer. Compensation plans and adjustments often live in the HR system or a separate compensation tool, while the pay employees actually received lives in each provider’s payroll results. Reconciling the plan with the result requires both sides in one comparable record.

How datascalehr connects them

datascalehr was built by people who built and ran payroll platforms at ADP, PayGroup and AstutePayroll. datascalehr connects HR, compensation and payroll data in four steps.

• Connect. datascalehr reads exports from any HR system, compensation source or payroll provider in the format the exports arrive in, by structured file, SFTP or API, including providers with no API.
• Map and confirm. KMod™ predicts each field mapping from 2M+ validated decisions across 8,000+ source and target schemas, and a payroll specialist confirms or corrects each prediction. KMod™ completes 89% of the mapping work on its own, and only uses mappings KMod™ knows are correct.
• Validate. datascalehr checks each record against the rules of the receiving system and country before the data arrives, so errors surface before the payroll run.
• Reconcile and learn. datascalehr compares source data with payroll results, flags each difference, and feeds every confirmed decision back into KMod™, so each new country starts with more of the mapping already done.

datascalehr has no fixed list of connectors. KMod™ learns from real payroll files in their real formats, so datascalehr can connect any HR system to any payroll provider, in any country and any language. A payroll specialist connects each country in under an hour, with no developer involved.

What you can do with connected data

• Switch payroll providers with a validated record of how every field was mapped.
• Integrate an acquisition by bringing the acquired company’s HR and payroll data into your governed record.
• Reconcile every payroll run by comparing what you sent with what came back, even when employee IDs don’t match.
• Post to the general ledger with a reconciled file in your ERP’s exact layout.
• Report on pay transparency from reconciled data, including the EU Pay Transparency Directive reports.
• See global labor cost as one dataset, by country, cost center and worker type.
• Build your own dashboards. With AI coding tools, many clients now vibe-code their own payroll dashboards on top of the clean, normalized data datascalehr provides.
• Feed AI agents with governed payroll data they can rely on.

Results in production

In Singapore, Strada, one of the world’s largest payroll providers, went from data discovery to 99.7% payroll accuracy in a parallel run in five days. Europe’s #1 payroll provider cut reconciliation time from 4 hours to 15 minutes per cycle. Several of the world’s largest payroll providers run datascalehr in the back end of the payroll services and dashboards they provide to their clients.

Frequently asked questions

What is the best way to connect multiple payroll providers to one HR system?

Use a layer that reads each provider in its own format and maps every field with payroll meaning. datascalehr connects any HR system, including Workday, SAP SuccessFactors, Oracle HCM and Dayforce, to any local payroll provider in any country, by structured file, SFTP or API, and a payroll specialist connects each country in under an hour.

Do I need to replace my local payroll providers?

No. datascalehr connects your existing HR system to your existing local payroll providers. Clients keep their providers and gain one governed record of pay across every country.

How do I combine compensation data with payroll results?

datascalehr brings compensation data from the HR system, a compensation tool or a spreadsheet into the same governed record as each provider’s payroll results, so planned pay and actual pay can be compared by employee, country and pay element.

Can I connect payroll providers that have no API?

Yes. datascalehr reads exports from any HR system or payroll provider in the format the exports arrive in, including spreadsheets, fixed-width files and SFTP transfers.

Is datascalehr a unified API?

No. A unified API maps many systems into one common data model for software developers. datascalehr is the context layer for global HCM data, and keeps each provider’s full local record, with the origin and lineage of every value.

Do I need developers to connect a new country?

No. A payroll specialist connects each country in under an hour. KMod™ proposes each field mapping, and the specialist confirms or corrects each proposal.

Does datascalehr understand effective dating and retroactive pay?

Yes. KMod™ treats each value with its effective date and pay period, carries retroactive changes through to the payroll that recalculates them, reads every year-to-date format, and handles vertical and horizontal file structures.

Does datascalehr send our payroll data to AI models?

No. Personal data is never sent to a large language model. Structural metadata, such as column names and country, supports the mapping suggestions, and a human accepts or rejects every suggestion.

Related pages

• Finch, Merge, Kombo or datascalehr: unified HR APIs compared
• Payroll control versus payroll data: Payslip, Payzaar and datascalehr
• How KMod™ and the Context Layer work
• datascalehr for multinational enterprises
• datascalehr for payroll service providers
• Connect Workday Global Payroll Connect to any payroll
• EU Pay Transparency reporting
• Data privacy and security Q&A

Descriptions of other vendors come from each company’s own website in October 2026. Product capabilities change, so check each vendor’s current documentation.