Integrate every ATS system with one API

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

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Why leading Talent Acquisition Software players choose Kombo

One standardized model
Read and write data across any ATS using the same set of endpoints. Whether it's Workday, SAP SuccessFactors, or Lever, you work with the same 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. Reading jobs, candidates, and applications and writing back new applications, stage changes, and attachments works the same whether you're connected to Greenhouse, Ashby, Oracle RC, or SmartRecruiters - same endpoints, same fields, same format.

Same granularity as a direct integration

Our unified API is built to cover all use cases, but every system has its quirks. Use custom fields to map tool-specific data to your schema. Access raw data from the source with remote data. Call the underlying API directly with passthrough for edge cases. All in real-time if needed.

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

How CV-Library increased candidate applications by 300% with Kombo

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Kombo’s team is proactive, responsive, and easy to work with. As an example, we raised a question this morning and received a response within 10 minutes.

Data model library

Users (ATS)
The User object represents a recruiter, hiring manager, or other team member in the ATS who can interact with jobs, candidates, and applications. Each user includes a first name, last name, email, and status.
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Jobs (ATS)
The Job object represents an open position in the ATS that candidates can apply to. Each job includes a name, description, employment type, status, visibility, location, department, salary information, and associated screening questions, stages, and hiring team members.
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Candidates (ATS)
The Candidate object represents an individual in the ATS who has applied or been sourced for one or more jobs. Use the Candidates endpoints to read candidate profiles and create new candidates. Each candidate includes contact information, source, location, social media links, associated applications, and tags.
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Applications (ATS)
The Application object represents a candidate's submission for a specific job, linking a candidate to a position in the hiring pipeline. Use the Applications endpoints to read applications, create new applications for jobs, move applications between stages, and reject applications. Each application includes the current stage, outcome, screening question answers, and associated interviews and offers.
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Application Stages (ATS)
The Application Stage object represents a step in the hiring pipeline that applications progress through. Each stage includes a name and index indicating its position in the workflow.
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Screening questions (ATS)
Screening Questions define the job-specific questions that candidates answer when applying. Read screening questions from jobs and submit candidate answers when creating applications. Supported question types include text, number, boolean, single-select, multi-select, date, and file, with support for conditional questions based on previous answers.
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Tags (ATS)
The Tag object represents a label that can be assigned to candidates for categorization and filtering. Use the Tags endpoints to read available tags, add tags to candidates, and remove tags from candidates.
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Interviews (ATS)
Use the Interviews endpoints to create and update scheduled interviews for applications. Each interview includes a title, start time, end time, location, interviewer user IDs, and organizer information.
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Offers (ATS)
The Offer object represents a job offer extended to a candidate for an application. Each offer includes a status (draft, approved, sent, accepted, declined, or abandoned), employment start date, and associated application with candidate and job details.
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Rejection reasons (ATS)
The Rejection Reason object defines the available reasons for declining a candidate's application. Read rejection reasons to populate selection options when rejecting applications through the reject application endpoint.
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Attachments (ATS)
Use the Attachments endpoints to upload and retrieve files associated with applications or candidates, such as resumes, cover letters, and other documents. Supported attachment types include CV, cover letter, and other file categories.
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Result links (ATS)
Use the Result Links endpoints to add external links to applications or candidates, such as assessment results or background check reports. Each result link includes a label, URL, and optional detail attributes like scores or completion times.
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Notes (ATS)
Use the Notes endpoint to add text annotations to applications. Notes support plain text content and enable recruiters to record additional context or communications about a candidate's application.
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Discover our HRIS integrations

Discover our ATS integrations

Discover our LMS integrations

Discover our Assessment 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
Workday
ATS
ATS (Assessment)
HRIS
LMS
SAP SuccessFactors
ATS
ATS (Assessment)
HRIS
LMS
SmartRecruiters
ATS
ATS (Assessment)
Factorial
ATS
HRIS
Oracle Recruiting Cloud
ATS
ATS (Assessment)
Lever
ATS
ATS (Assessment)
iCIMS
ATS
ATS (Assessment)
Cornerstone TalentLink
ATS
Recruitee
ATS
ATS (Assessment)
RecruiterFlow
ATS
Greenhouse
ATS
ATS (Assessment)
Teamtailor
ATS
ATS (Assessment)
Teamtailor Job Boards
ATS
Ashby
ATS
ATS (Assessment)
CEGID TalentSoft FrontOffice
ATS
concludis
ATS
Talention
ATS
Onlyfy
ATS
Personio
ATS
HRIS
UKG Pro
ATS
ATS (Assessment)
HRIS
UKG Ready
ATS
HRIS
ADP Workforce Now
ATS
HRIS
Taleo
ATS
rexx systems
ATS
HRIS
AFAS Software
ATS
HRIS
BambooHR
ATS
HRIS
Bullhorn
ATS
ATS (Assessment)
Workable
ATS
Jobvite
ATS
ATS (Assessment)
Fountain
ATS
Softgarden
ATS
Pinpoint
ATS
Welcome to the Jungle
ATS
d.vinci
ATS
d.vinci admin
ATS
JOIN
ATS
Sage HR
ATS
HRIS
TRAFFIT
ATS
eRecruiter
ATS
Abacus Umantis
ATS
Jobylon
ATS
ATS (Assessment)
Taleez
ATS
HR WORKS
ATS
HRIS
OTYS
ATS
Zoho Recruit
ATS
Ceipal
ATS
Eploy
ATS
JobDiva
ATS
CareerPlug
ATS
Perview
ATS
Eightfold
ATS
ATS (Assessment)
Paylocity
ATS
HRIS
Paycor
ATS
HRIS
Avature
ATS
ATS (Assessment)
Apploi
ATS
Phenom
ATS
Paradox
ATS
Heyrecruit
ATS
RECRU
ATS
JazzHR
ATS
BITE
ATS
Homerun
ATS
Mysolution
ATS
Carerix
ATS
HR Office
ATS
Talent Clue
ATS
InRecruiting by Zucchetti
ATS
Ubeeo
ATS
Connexys By Bullhorn
ATS
HR4YOU
ATS
HRIS
Cornerstone OnDemand
ATS
HRIS
LMS
Zvoove Recruit
ATS
Odoo
ATS
Spark Hire Recruit
ATS
Compleet (PersoProfiler)
ATS
Compleet
ATS
Gem
ATS
Laura
ATS
Coveto (REST API)
ATS
Coveto (legacy SOAP API)
ATS
Crelate
ATS
Manatal
ATS
Avionté
ATS
MHM HR
ATS
Asymbl
ATS
Breezy HR
ATS
Flatchr
ATS
Dayforce
ATS
HRIS
Digital Recruiters
ATS
ApplicantStack
ATS
ReachMee
ATS
TalentAdore
ATS
GuideCom
ATS
Spott
ATS
Loxo
ATS
PayFit
HRIS
Employment Hero
HRIS
Fourth
HRIS
Kenjo
HRIS
HeavenHR
HRIS

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.