HRMS migration

Migrate from Sloneek to Bullhorn ATS & CRM

Field-level mapping, validation, and rollback between Sloneek and Bullhorn ATS & CRM. We move data and schema; workflows are rebuilt natively in Bullhorn ATS & CRM.

Sloneek logo

Sloneek

Source

Bullhorn ATS & CRM

Destination

Bullhorn ATS & CRM logo

Compatibility

86%

12 of 14

objects map 1:1 between Sloneek and Bullhorn ATS & CRM.

Complexity

BStandard

Timeline

3-5 weeks

Rollback included Accuracy guarantee Field-level validation

Overview

What this migration involves

Moving from Sloneek to Bullhorn is a shift from a generalist Central European HRIS to a recruitment-specialized ATS and CRM platform. Sloneek's all-in-one model covers core HR, payroll, ATS, attendance, and performance in a single tenant; Bullhorn is purpose-built for staffing agencies and in-house recruiting teams that need deep candidate pipeline management, client relationship tracking, and placement workflows. The migration scope centers on Sloneek's ATS Candidate records (which Sloneek is actively migrating from ATS 1.0 to ATS 2.0 as of 2025), employee profiles, document attachments, attendance data (split across two schemas during Sloneek's transition period), and absence balances. We do not migrate Sloneek Workflows, approval chains, performance review cycles, or Sloneek Intelligence configurations; these require manual rebuild in Bullhorn or are out of scope. Bullhorn's ATS Growth edition does not include API access, so we verify the destination Bullhorn tier during scoping to confirm API availability before committing to an API-based migration approach.

Field-level fidelity

Every standard and custom field arrives verified.

Schema-aware mapping

AI proposes the map; you confirm before any record moves.

Relationships preserved

Parent–child, lookups, and ownership stay linked.

Full activity history

Calls, emails, meetings — with original timestamps.

Attachments & notes

Documents, uploads, and inline notes move with the record.

Why teams make this switch

Two sides of the same decision

Leaving

Sloneek logo

Sloneek

What's pushing teams away

  • Complex feature depth creates a steep learning curve for administrators new to HRIS systems, particularly around workflow configuration and module interconnections.
  • Document management restricted to PDF format only, frustrating teams that need to store Word documents, spreadsheets, or image-based records as employee files.
  • API is not publicly documented, blocking automation and integration use cases that require programmatic access to employee records or attendance data.
  • Some modules (ATS, advanced performance, payroll) require higher plan tiers, creating feature gaps for customers who expected full coverage at the base price.
  • Limited third-party integrations outside of Slack and JIRA, making it difficult to connect Sloneek data into broader analytics or finance tooling.

Choosing

Bullhorn ATS & CRM logo

Bullhorn ATS & CRM

What's pulling them in

  • Agencies choose Bullhorn because it combines ATS and CRM in one platform, eliminating the need to switch between separate tools for candidate management and client relationship tracking.
  • The resume parser extracts contact details, work history, and skills into structured, searchable candidate profiles automatically without manual data entry, reportedly driving 24% more placements per recruiter.
  • Bullhorn's placement and split-billing model natively supports contract staffing workflows, handling start/end dates, overtime rules, and multi-party pay/charge rates in a single record.
  • The platform offers extensive third-party integrations through its Recruitment Cloud Marketplace, connecting with back-office, onboarding, and payroll systems used by staffing agencies.
  • 72% of Bullhorn customers are teams with fewer than 10 users, and Bullhorn's implementation team handles setup and data migration for small agencies going live within weeks.

Object mapping

How Sloneek objects map to Bullhorn ATS & CRM

Each row shows how a Sloneek object lands in Bullhorn ATS & CRM, including any object-level transformations, lookup resolution, or schema-design dependencies.

Typical mapping — final map is confirmed during the sample migration step.

Sloneek

Employees

maps to

Bullhorn ATS & CRM

Corporate User (Employee)

1:1
Fully supported

Sloneek employee profiles map to Bullhorn Corporate User records for internal staff and to Candidate records for employees who are also being tracked as talent in the Bullhorn system. Standard fields (name, email, phone, department, job title) map to Bullhorn user fields. We resolve the Bullhorn Corporate User by email match and create any missing user accounts in the reconciliation queue before record import. Custom fields on Sloneek employee profiles migrate to Bullhorn User custom fields.

Sloneek

ATS Candidates

maps to

Bullhorn ATS & CRM

Candidate

1:1
Mapping required

Sloneek ATS Candidate records (from both ATS 1.0 and ATS 2.0 schemas if both exist) map to Bullhorn Candidate records. Sloneek's candidate name, email, phone, resume (as file attachment), GDPR consent flags, hiring pipeline stage, and notes transfer directly. We detect which ATS schema each Sloneek record belongs to at export time and route both schemas through the same Bullhorn Candidate import. Sloneek's GDPR consent storage (consent date, consent type, consent version) maps to Bullhorn custom fields on Candidate because Bullhorn does not have a native GDPR consent object.

Sloneek

ATS Job Positions

maps to

Bullhorn ATS & CRM

JobOrder

1:1
Fully supported

Sloneek job positions and open requisitions map to Bullhorn JobOrder records. Fields including job title, job description, location, employment type (full-time, contract, part-time), and salary range transfer to Bullhorn JobOrder fields. JobOrder status (open, filled, closed) maps to Bullhorn's status field. If Sloneek job positions are tied to specific ATS pipeline stages, we map those to Bullhorn JobOrder status and a corresponding Bullhorn custom field.

Sloneek

ATS Pipeline Stages

maps to

Bullhorn ATS & CRM

Candidate Rush Process

lossy
Fully supported

Sloneek's recruitment pipeline stages (application, screening, interview, offer, hired, rejected) map to Bullhorn's Rush Process stages. We configure the Rush Process in Bullhorn during the schema setup phase to match the Sloneek pipeline exactly. Each Sloneek stage maps to a corresponding Rush Process status value with the same order index preserved.

Sloneek

Documents

maps to

Bullhorn ATS & CRM

ContentDocument and Attachment

1:1
Mapping required

Sloneek employee documents and candidate resume files migrate to Bullhorn. Bullhorn supports multiple file types (unlike Sloneek's PDF-only restriction), so we transfer files in their original format. We flag any Sloneek PDF documents that the customer uploaded in a non-standard way (scanned images embedded in PDF, password-protected PDFs) for pre-migration remediation. Resume files attach to the Bullhorn Candidate record via ContentDocumentLink.

Sloneek

Organizational Structure

maps to

Bullhorn ATS & CRM

Corporate Department

1:1
Fully supported

Sloneek departments, cost centers, and org chart hierarchies map to Bullhorn Corporate Department records. Employee reporting lines (manager relationships) transfer to Bullhorn User managerId references. Bullhorn's org structure is simpler than Sloneek's; if the Sloneek tenant uses multi-level cost center hierarchies, we flatten them to a single department level in Bullhorn and document the original hierarchy for the customer's admin to rebuild as Bullhorn custom fields or a separate organizational chart tool.

Sloneek

Attendance Records

maps to

Bullhorn ATS & CRM

Bullhorn Time or Custom Object

lossy
Mapping required

Sloneek attendance data is currently split between the old attendance schema and Attendance 2.0 in active tenants. We detect which schema applies to each attendance record at export time and map both schemas to a Bullhorn custom attendance object or the Bullhorn Time module if the customer licenses it. Attendance 2.0 fields (clock-in, clock-out, break duration, overtime flag) map to custom fields in the destination. Old schema fields map to equivalent custom fields where possible; we flag any fields with no Bullhorn equivalent during scoping.

Sloneek

Absences

maps to

Bullhorn ATS & CRM

Custom Absence Object or Note

1:1
Fully supported

Sloneek time-off balances, absence requests, leave type classifications, and accrual history map to a Bullhorn custom Absence object or to note records on the Corporate User if no custom object is configured. Leave type (vacation, sick, personal) maps to a Bullhorn custom picklist field. Accrual balances transfer as of the migration date; we flag that future accrual calculation resets in Bullhorn and recommend the customer's admin sets accrual rules post-migration.

Sloneek

Compensation History

maps to

Bullhorn ATS & CRM

Candidate Custom Fields or Placement

1:1
Mapping required

Sloneek salary, bonus, and payroll history (available on higher plan tiers) map to Bullhorn Candidate custom fields or Placement record fields if the candidate has a placement in Bullhorn. We map current salary, salary currency, and pay frequency to Bullhorn custom fields on Candidate. Historical pay changes migrate as separate dated entries if the customer requires full compensation history; otherwise, only the most recent compensation record migrates.

Sloneek

Performance Reviews

maps to

Bullhorn ATS & CRM

Custom Object

1:1
Fully supported

Sloneek 360-degree feedback records, goals, and completed review cycles map to a Bullhorn custom Performance Review object or to note records attached to the Corporate User. Draft or in-progress reviews are flagged as not migrating because they require an active Sloneek session to finalize. Completed review ratings migrate to Bullhorn custom fields with a review date and reviewer reference; the customer's Bullhorn admin rebuilds the review template structure post-migration.

Sloneek

Custom Fields

maps to

Bullhorn ATS & CRM

Custom Fields on respective Bullhorn objects

1:1
Mapping required

Sloneek custom fields on employee profiles, candidate records, and ATS objects migrate to Bullhorn custom fields on the corresponding Bullhorn object. Bullhorn supports text, number, date, picklist, and reference (lookup) field types. We discover the full custom field schema during scoping, map each to a matching Bullhorn field type, and pre-create fields in the Bullhorn destination org before any data import begins. Any Sloneek custom fields without a Bullhorn equivalent are documented in the migration scope with a recommended workaround.

Sloneek

Assets

maps to

Bullhorn ATS & CRM

Corporate User Custom Field or Note

1:1
Fully supported

Sloneek company assets assigned to employees (equipment, access cards, licenses) map to Bullhorn Corporate User custom fields or note records. We export the asset-to-employee assignment mapping and recreate it in Bullhorn as a comma-separated list in a custom text field or as separate note records per asset. The customer may prefer to manage asset tracking in a dedicated ITAM tool post-migration; we document the asset assignment data for that decision.

Sloneek

Time Entries

maps to

Bullhorn ATS & CRM

Bullhorn Time or Custom Object

1:1
Fully supported

Sloneek time entries (where used for project billing or timesheet tracking) map to Bullhorn Time module if licensed, or to a custom timesheet object. We map employee, project, date, hours, and entry type to Bullhorn custom fields. If the customer does not license Bullhorn Time, we deliver a written export of all time entry records that the customer can import into a third-party timesheet tool.

Sloneek

Workflows and Approvals

maps to

Bullhorn ATS & CRM

Not migrated (documented for rebuild)

1:1
Mapping required

Sloneek approval chains for time-off requests, document signing, and expense approvals do not migrate. Bullhorn's workflow model differs structurally from Sloneek's. We document every active Sloneek approval chain (trigger, approver chain, conditions, actions) in a written inventory delivered to the customer's admin. The admin or a Bullhorn partner rebuilds approval rules in Bullhorn Workflow or a Bullhorn-certified automation tool post-migration.

Gotchas + challenges

What specifically takes care here

Platform-specific issues from each side, plus the pair-specific challenges that don't show up on either platform's page on its own.

Sloneek logo

Sloneek gotchas

High

Sloneek API is not publicly documented

Medium

Attendance 2.0 schema migration in progress

Medium

Document uploads restricted to PDF format only

Medium

Plan-tier feature gating affects module availability

Bullhorn ATS & CRM logo

Bullhorn ATS & CRM gotchas

High

ATS Growth edition has no API access

High

Attachments excluded from CSV bulk exports

Medium

Custom Object limits vary sharply by edition

Medium

Opportunity pipeline stages are recruitment-specific

Low

Resume parse quality varies by document format

Pair-specific challenges

  • Bullhorn ATS Growth edition excludes API access

    Bullhorn's ATS Growth edition (their entry tier) does not include API access. This is a hard product limitation: API-based migration is not possible on this tier. Before migration scoping, we verify the customer's Bullhorn edition. If the destination is ATS Growth, we recommend upgrading to a tier that includes API access (ATS Professional or higher) before migration begins. API access is required for Bullhorn's REST endpoints used to create Candidates, JobOrders, and Corporate Users in batch.

  • Bullhorn rate limits require batch chunking and backoff

    Bullhorn enforces 50 concurrent API sessions, 100,000 total API calls per month, and 1,500 calls per minute across all paid tiers (except ATS Growth, which has no API). During migration, we chunk large record sets into batches of 200 or fewer, implement exponential backoff on 429 responses, and track the X-Rate-Limit-* headers in real time. If the customer's migration scope approaches the monthly call limit (common with large candidate databases and activity history), we stage the migration across calendar months or use Bullhorn's bulk file import (CSV via Bullhorn Data Import) as an alternative for high-volume objects.

  • Sloneek ATS 1.0-to-2.0 dual-schema requires schema detection

    Sloneek is actively transitioning from ATS 1.0 to ATS 2.0 with a July 31 disconnection date for ATS 1.0 per their knowledgebase. Active Sloneek tenants may have candidate records, job positions, and pipeline data split across two schemas with different field names and structures. We detect the schema of each Sloneek record at export time by checking the API response structure and field presence, route both schemas through the same Bullhorn import logic, and merge them into unified Bullhorn Candidate and JobOrder records. If the customer waits until after the ATS 1.0 disconnection date, we import from the cleaner ATS 2.0 schema only.

  • PDF-only document restriction from Sloneek survives migration

    Sloneek's document management accepts only PDF files. Any employee documents or candidate files in Sloneek that are not PDF (Word files, spreadsheets, image scans) were not uploadable to Sloneek originally. For the Bullhorn migration, Bullhorn accepts multiple file types, so all document formats transfer without conversion. However, non-PDF files that were uploaded to Sloneek via a workaround (converted externally before upload) migrate cleanly. We flag any files that show signs of external conversion or metadata anomalies during the export audit.

  • GDPR consent flags require Bullhorn custom field mapping

    Sloneek stores GDPR consent date, consent type, and consent version as structured fields on candidate records. Bullhorn does not have a native GDPR consent object or standard fields for consent tracking. We map Sloneek's consent fields to Bullhorn Candidate custom fields (consent_date__c, consent_type__c, consent_version__c) created during schema setup. If the customer is subject to GDPR and requires documented consent trails for compliance audits, we recommend the customer's Bullhorn admin sets up Bullhorn's native GDPR tooling or a certified GDPR partner add-on post-migration.

Migration approach

Six steps for a successful Sloneek to Bullhorn ATS & CRM data migration

  1. Discovery, edition verification, and schema audit

    We audit the source Sloneek tenant across all active modules (Core HR, ATS, attendance, absence, documents, performance). We confirm which Sloneek plan tier the customer is on and which modules are accessible. We detect whether ATS 1.0, ATS 2.0, or both schemas contain active candidate data. We verify the customer's Bullhorn edition to confirm API access is available. We inventory custom fields on employee profiles and ATS objects, document all active Sloneek workflows and approval chains for the rebuild inventory, and flag any plan-tier gaps where data modules are not populated. Discovery output is a written migration scope with record counts per object and a Bullhorn edition recommendation if API access is not confirmed.

  2. Schema design and Bullhorn custom field creation

    We design the Bullhorn destination schema in a Sandbox or development org. This includes creating all custom fields on Candidate (for ATS data), Corporate User (for employee data), JobOrder (for job positions), and any custom objects needed for attendance, absences, or performance reviews. Bullhorn field types are mapped from Sloneek field types during this phase. Rush Process stages are configured to match the Sloneek ATS pipeline exactly. We coordinate with the customer's Bullhorn admin to deploy custom fields via Bullhorn's field management UI or via API before data migration begins.

  3. Sloneek data extraction in dependency order

    We extract Sloneek data in record-dependency order: first, organizational structure (departments, managers); second, Corporate Users and Candidate skeleton records; third, ATS JobOrders; fourth, ATS Candidate records with resume attachments; fifth, employee profiles; sixth, documents and file attachments; seventh, attendance and absence data (from both ATS 1.0 and 2.0 schemas where present); eighth, compensation history and performance reviews. Each extraction phase emits a record count and field-completeness report. We flag any records with missing required fields and escalate to the customer before the next phase begins.

  4. Bullhorn sandbox migration and reconciliation

    We run a full migration into a Bullhorn Sandbox environment (or the production org if Sandbox is not available) using production-like data volume. The customer's Bullhorn admin and HR lead reconcile record counts (Candidates in, JobOrders in, Corporate Users in, Documents in), spot-check 25-50 random records against the Sloneek source, and verify that Rush Process stages match the original Sloneek pipeline. Any field mapping corrections, missing custom fields, or schema issues surface here. The customer signs off on the sandbox migration before production cutover is scheduled.

  5. Production migration in dependency order with rate-limit handling

    We run production migration in record-dependency order matching the sandbox sequence. Bullhorn API calls are chunked into batches of 200 records with exponential backoff on 429 responses and real-time rate-limit tracking. Document attachments are uploaded after their parent record (Candidate or Corporate User) is confirmed in Bullhorn. Attendance records are staged separately if the monthly API call limit is approached. Each phase emits a reconciliation report (record count, error count, error log) before the next phase begins. We pause and escalate if more than 2% of records in any phase fail with validation errors.

  6. Cutover, delta sync, and workflow rebuild handoff

    We freeze Sloneek writes during cutover (typically a 48-72 hour window). We run a final delta migration of any records created or modified during the cutover window. We verify all Bullhorn record counts against the final Sloneek export. We deliver the written workflow and approval chain inventory to the customer's Bullhorn admin for rebuild. We deliver a GDPR consent field mapping summary for the customer's compliance team. We provide a one-week hypercare window to resolve reconciliation issues. We do not rebuild Sloneek workflows as Bullhorn workflows, automate Bullhorn sequences, or configure Bullhorn GDPR tooling as standard scope; these are separate engagements or internal admin tasks.

Platform deep dives

Context on both ends of the pair

Sloneek logo

Sloneek

Source

Strengths

  • All-in-one platform covers the full employee lifecycle from recruitment to offboarding without requiring separate vendor products.
  • Strong EU/GDPR compliance with automated consent management, retention periods, and data anonymization features baked into the ATS and core HR modules.
  • Competitive pricing starting at €6 per user per month, positioning it between free-tier tools and enterprise HRIS platforms.
  • Sloneek Intelligence AI assistant provides a conversational interface across employee data, enabling bulk operations without manual UI work.
  • Central European origin means EU-local data residency options and a product roadmap oriented toward EU regulatory requirements.

Weaknesses

  • API is not publicly documented, limiting automated migration options and requiring export workarounds for programmatic data extraction.
  • PDF-only document restriction narrows what can be transferred as employee file attachments.
  • Attendance 2.0 migration is ongoing — old and new attendance schemas coexist in live tenants, requiring schema detection before migration scoping.
  • Feature depth creates a steeper learning curve for small teams or HR administrators transitioning from simpler payroll-only tools.
  • Third-party integrations are limited to Slack and JIRA, with no published API for connecting BI, finance, or ERP systems.
Bullhorn ATS & CRM logo

Bullhorn ATS & CRM

Destination

Strengths

  • Unified ATS and CRM on one platform purpose-built for staffing agencies, eliminating separate tools for candidates and clients.
  • Automated resume parsing extracts structured candidate data—contact details, work history, skills—into searchable profiles instantly.
  • Native placement and split-billing model handles contract staffing workflows including start/end dates and overtime rules.
  • Bullhorn Recruitment Cloud Marketplace offers 100+ pre-validated third-party integrations spanning the full recruiting lifecycle.
  • 24/7 global support coverage from 350+ support staff with dedicated account management included at all tiers.

Weaknesses

  • Widely regarded as old and bloated with an unintuitive interface and steep learning curve for new recruiters.
  • Slow page loads and performance lag cited in over 200 verified G2 reviews during high-volume recruiting periods.
  • Pricing is opaque—custom-negotiated per organization with significant upfront implementation fees that vary by deal.
  • ATS Growth edition excludes API access entirely, preventing automated data export without upgrading first.

Complexity grading

How hard is this migration?

Standard HRMS migration. 1 of 7 objects need a mapping; the rest are 1:1.

B

Overall complexity

Standard migration

Derived from compatibility, mapping clarity, API constraints, and data volume across Sloneek and Bullhorn ATS & CRM.

  • Object compatibility

    B

    1 of 7 objects need a mapping; the rest are 1:1.

  • Field mapping clarity

    C

    Field mapping is derived from defaults — final spec confirmed during the sample migration.

  • Timeline complexity

    B

    7-object category — typical timelines run 2–7 days end-to-end.

  • API constraints

    B

    Sloneek: Not publicly documented.

  • Data volume sensitivity

    B

    Sloneek doesn't expose a bulk API — REST + parallelization used for high-volume runs.

Estimator

Estimate your Sloneek to Bullhorn ATS & CRM migration cost

Rule-based pricing — no per-record fees, no manual quotes. Migrations over 2M records are scoped individually.

Step 1

What are you migrating?

Pick a category, then your source and destination platforms.

Category

FAQ

Frequently asked questions about Sloneek to Bullhorn ATS & CRM data migrations

Answers to the questions buyers ask most during Sloneek to Bullhorn ATS & CRM migration scoping. Not seeing yours? Book a call.

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Most migrations land between three and five weeks for accounts under 5,000 candidate records, 2,000 employees, and a single ATS pipeline with no attendance dual-schema complexity. Migrations with active ATS 1.0 and ATS 2.0 dual schemas, bulk document packages (over 10,000 attachments), large absence and attendance histories, or multi-pipeline recruitment structures move to eight to twelve weeks because of schema detection, file conversion, and Bullhorn API batch sequencing. Sloneek's own documentation recommends starting migration once ongoing recruitments are closed, which can add to the timeline if the customer needs to pause active hiring during cutover.

Adjacent paths

Related migrations to explore

Ready when you are

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