Integrate every assessment module with one API

Ship new integrations in days, not months. Read and write assessment and background check data to all major applicant tracking systems with our Unified API.

Trusted by the world’s leading B2B companies

Why leading assessment and background check providers choose Kombo

One standardized model
Publish packages and write back results to any ATS using the same set of endpoints. Whether it’s Workday, SAP SuccessFactors, or Lever, you work with the same assessment data model.
Seamless authentication
Embed our white-labeled connection guide into your product to easily let your customers connect their systems.
Access any data
Map custom fields from any system to your own unified schema. Use remote data to access raw data when you need to access niche fields.
Full visibility
Track sync status, spot authentication issues, and debug problems from the dashboard. Get webhook notifications when things change or need attention.

One data model for every integration

Build to Kombo once and connect to any ATS assessment module. Setting up packages, receiving webhooks for new orders, and writing back results in structured formats work the same whether you're connected to Avature, UKG Pro, Bullhorn, or SmartRecruiters - same endpoints, same fields, same format.

Write back structured assessment results

Deliver rich result data - subscores, criteria, completion times, and more - in a structured format into the ATS to let recruiters take their hiring decisions. Kombo handles the mapping to the format each system expects, whether you’re connected to Workday, SAP SuccessFactors, Greenhouse, or SmartRecruiters.

Monitor all your integrations from one place

See sync status, authentication issues, and errors across every customer connection in the dashboard. Searchable logs show you exactly what happened with each API request. Set up webhooks to get notified when errors occur or credentials need attention, so your support team can resolve issues without always having to pull in engineering.

Featured Case Study

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Data model library

Packages (Assessment)
The Package object represents an assessment or background check offering that can be ordered through the ATS. Use it to define your available products - such as skills tests, video interviews, or background checks - that hiring teams can select when evaluating candidates
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Orders (Assessment)
The Order object represents a request from the ATS to conduct an assessment or background check on a candidate. Each order includes the selected package, candidate details, and associated job and application information.
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Results (Assessment)
The Result object tracks the outcome of an assessment or background check order. Use it to write back completion status, scores, and result links to the ATS once a candidate has finished their assessment.
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Webhooks (Assessment)
The assessment webhook notifies you in real-time when a hiring team requests an assessment or background check for a candidate in the ATS. Use it to immediately trigger your assessment workflow without polling for new orders.
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Discover our HRIS integrations

Discover our ATS integrations

Discover our LMS integrations

Discover our LMS integrations

Build and maintain all HRIS integrations with one data model. Employees, groups, performance, and timesheets all follow the same format - no need to transform data or map fields differently for each system.
Build and maintain ATS integrations with one data model. Jobs, candidates, applications, and attachments all follow the same format - no need to transform data or map fields differently for each system.
Build and maintain LMS integrations with one data model. Users, courses, and progressions follow the same format - no need to transform data or map fields differently for each system.
Build and maintain Assessment integrations with one data model. Packages, orders, and results follow the same format - no need to transform data or map fields differently for each system.
ATS (Assessment)
Cezanne HR
HRIS
Microsoft Entra ID
HRIS
Microsoft Azure AD
HRIS
Google Workspace
HRIS
Nmbrs
HRIS
Deel
HRIS
Remote
HRIS
IRIS Cascade
HRIS
Okta
HRIS
Sage People
HRIS
Humaans
HRIS
Eurécia
HRIS
Oracle HCM
HRIS
Officient
HRIS
Sesame HR
HRIS
Charlie
HRIS
Abacus
HRIS
Zoho People
HRIS
Gusto
HRIS
Breathe HR
HRIS
CatalystOne
HRIS
Mirus
HRIS
Simployer
HRIS
Visma Peple
HRIS
Visma YouServe
HRIS
Hansalog
HRIS
Lattice
HRIS
Lattice Talent
HRIS
HoorayHR
HRIS
TriNet (Zenefits)
HRIS
Namely
HRIS
Paycom
HRIS
Insperity
HRIS
Paychex
HRIS
Rippling
HRIS
Kallidus (Sapling)
HRIS
PeopleHR
HRIS
Lucca
HRIS
Zelt
HRIS
Planday
HRIS
BoondManager
HRIS
Hailey HR
HRIS
OysterHR
HRIS
Tellent HR
HRIS
Square
HRIS
Perbility Helix
HRIS
Leapsome
HRIS
Loket
HRIS
workforce.com
HRIS
MHR People First
HRIS
SD Worx
HRIS
iTrent
HRIS
Absence.io
HRIS
a3innuva Nómina
HRIS
SCIM
HRIS
DATEV
HRIS
DATEV LODAS
HRIS
DATEV Lohn & Gehalt
HRIS
Sympa
HRIS
Visma Raet - Youforce
HRIS
Nibelis
HRIS
PeopleXD
HRIS
360Learning
LMS
LinkedIn Learning
LMS
Docebo
LMS

Designed for enterprise data protection needs

Customer trust and data security are critical to us. Kombo provides comprehensive security controls and compliance frameworks specifically built for the regulatory requirements and data sensitivity of HR and TA tech integrations.
Reliability at scale
We power integrations for hundreds of companies, from seed-stage startups to Fortune 500 enterprises - all while maintaining 99.9% uptime. Our infrastructure is built to handle your growth without compromising performance.
Onboarding support
We work closely with your team via shared Slack or Teams channels. Your customers get detailed connection guides and transparent documentation on tool-specific limitations - so nothing catches them off guard.
Configurable data scoping
Collect only what you need. Define exactly which fields, information, or data points flow through each integration. Mark fields as required, optional, or disabled based on compliance  requirements and use case needs.

Compliant with security and privacy standards

Built-in security controls and industry-standard certifications protect your customers' data. Kombo complies with SOC 2 Type 2, HIPAA, GDPR, and is also ISO 27001 certified.