When someone is hired or updated in ADP, their profile appears in 15Five automatically — nobody retypes it. That sync is the foundation the rest sits on: completed performance review data travels back from 15Five into ADP, so adjustments, bonuses and salary promotions can be made with the review in front of you, and each employee’s objectives and key results arrive in ADP with their completion percentage. Your HR team stops maintaining two employee lists and starts seeing performance and payroll in one place.
Flexspring builds, hosts, and monitors the connection for you and is one of the leading sellers of data connectors for ADP. There is also a turnkey connector that shares 33 data fields and lets you decide, field by field, what is visible in 15Five; 15Five’s onboarding team sets that version up. A turnkey integration goes live in 1–2 weeks and a custom integration in 8–10 weeks. The integration works with ADP Workforce Now, ADP Workforce Now Next Generation, ADP Lyric HCM, ADP Enterprise HR and ADP Vantage HCM.
The three items below move between 15Five and ADP. The first is foundational — the other two need it in place. Flexspring also does custom integration work for one-time payments, banking and tax, expense management, learning management, equity systems, background checks, and assessments.

Flexspring iPaaS does not store employee data beyond temporary transaction logs, and meets SOC 2, GDPR and ISO 27001 standards.
With data integration, new hires and employee updates move from ADP into 15Five automatically to create employee profiles, and completed performance review data plus objectives and key results travel back from 15Five into ADP. Flexspring builds the integration to match your custom fields and business rules, then hosts and monitors it.
You decide which information you want to sync, and a data integration expert like Flexspring maps every field between the two systems and builds the connection. Custom integrations by Flexspring include unlimited custom fields and unlimited business rules. There is nothing for your team to install or maintain. There is also a turnkey connector that shares 33 standard data fields, which 15Five’s onboarding team sets up.
With data integration, new hires and employee updates sync from ADP into 15Five to build each employee profile. Completed performance review data syncs from 15Five into ADP — up to five questions of your choice — along with objectives and key results and their completion percentage, placed in the ADP custom field you choose. You can also add one-time payments, banking and tax, expense management, learning management, equity systems, background checks, and assessments.
Flexspring builds, hosts, and monitors the connector. A turnkey integration of new hires from 15Five to ADP is fully deployed in 1–2 weeks. A custom integration takes 8–10 weeks. Most businesses need the custom build to match their own field names and custom fields. Custom integration by Flexspring includes unlimited custom fields and unlimited business rules. Flexspring does all the data mapping, so no internal IT resources are needed.
Flexspring does not store employee data beyond temporary transaction logs, and does not require anyone to handle the data manually. Flexspring meets SOC 2, GDPR and ISO 27001 standards.
No internal IT resources are needed to create your data integration. Flexspring’s team builds the integration to your requirements and monitors it afterwards, including handling API changes from either vendor. Your part is deciding which use cases you need and confirming Flexspring’s recommendations for how your fields should map.
With data integration, when someone is hired or updated in ADP, their profile appears in 15Five automatically — nobody retypes it. Your HR team stops maintaining two employee lists, and completed review data lands back in ADP so adjustments, bonuses and salary promotions can be made with the review in front of you.
The best way to connect 15Five to ADP depends on your data and business requirements. A standard connector can work for simple data flows, while custom fields and unique business rules require a tailored integration. If you go the custom route, you can build the integration yourself or choose a managed integration like Flexspring’s — built and maintained for you, which is typically faster and cheaper.
The guide includes pricing for each use case, how to choose between essential and custom, and which version fits your team. Sent within one business day.
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