HRMS migration

Migrate from Yello to Bullhorn ATS & CRM

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

Yello logo

Yello

Source

Bullhorn ATS & CRM

Destination

Bullhorn ATS & CRM logo

Compatibility

58%

7 of 12

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

Complexity

BStandard

Timeline

4-7 weeks

Rollback included Accuracy guarantee Field-level validation

Overview

What this migration involves

Moving from Yello to Bullhorn is a cross-platform migration from a campus-recruiting-focused ATS to a staffing-agency ATS with a documented REST API. Yello lacks a public API, so we extract from structured CSV exports and sequence records in dependency order before writing into Bullhorn. We preserve Candidate profiles, Job Requisition metadata, Event registrations, Pipeline Stages, Evaluations, Notes, Tags, and binary Attachments. Multi-day Events require flattening from a date range into individual day records. Bullhorn's Custom Objects must be requested through Bullhorn Support and are capped at 2 for Bullhorn ATS tier and 10 for Front Office Growth/Enterprise; we scope custom field destinations accordingly and submit the Custom Object Setup Sheet on the customer's behalf during configuration. Workflows, automations, and email sequences do not migrate; we deliver a written inventory of every active automation for the customer's admin to rebuild in Bullhorn.

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

Yello logo

Yello

What's pushing teams away

  • Limited customization and flexibility: TechnologyCounter explicitly lists 'customization possible: No' and notes the platform lacks API access, frustrating teams with non-standard recruiting workflows.
  • Pricing concerns: Several verified reviewers cite cost as a pain point, with the platform perceived as expensive relative to alternatives for smaller or mid-market recruiting teams.
  • Alternative ATS adoption: Competitors like Workable appear frequently in Yello alternatives lists, suggesting teams evaluate and sometimes switch to platforms offering broader ATS functionality or lower price points.
  • Mobile and accessibility limitations: While Yello supports mobile access, reviewers note the mobile experience does not fully replicate desktop functionality, creating friction for recruiters working in the field.

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 Yello objects map to Bullhorn ATS & CRM

Each row shows how a Yello 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.

Yello

Candidate

maps to

Bullhorn ATS & CRM

Candidate

1:1
Fully supported

Yello Candidate records map to Bullhorn Candidate. Standard fields (name, email, phone, address, source, pipeline stage, tags) migrate directly. Any custom Candidate properties discovered during the custom field audit phase map to Bullhorn custom fields on the Candidate entity or to Bullhorn Custom Objects (customObject1s-customObject10s) if the customer is on Front Office Growth/Enterprise tier. Candidates without an email are flagged in a deduplication pass because Bullhorn uses email as the primary Candidate dedupe key. Tags from Yello map to Bullhorn Tags (category, skill, school) via the tag relationship in Bullhorn's Candidate schema.

Yello

Job Requisition

maps to

Bullhorn ATS & CRM

JobOrder

1:1
Fully supported

Yello Job Requisitions map to Bullhorn JobOrder records. Requisition metadata (title, department, location, headcount, status, employment type) migrates directly to corresponding JobOrder fields. The Requisition-to-Candidate association migrates as JobSubmission records in Bullhorn, preserving the applicant relationship. JobOrder's status field maps from Yello's Requisition status (Open, Closed, On Hold) to Bullhorn's jobStatus values.

Yello

Event

maps to

Bullhorn ATS & CRM

Event (multiple strategy)

1:many
Fully supported

Yello Campus Events spanning multiple days require flattening. Yello exports a multi-day Event as a single record with a start date and end date. We parse the date range, split into individual day records, and write each as a separate Bullhorn Event. If the destination Bullhorn edition supports Custom Objects, we create a parent Event Custom Object (customObject1) to link the daily records back to the original Event for reporting. Registration lists and Candidate attendance records migrate as EventAttendee or custom Event registration records.

Yello

Evaluation

maps to

Bullhorn ATS & CRM

Candidate Scorecard or Custom Object

lossy
Fully supported

Yello Evaluations are structured feedback records tied to a Pipeline Stage including scores, comments, and evaluator attribution. Bullhorn does not have a native evaluation form object below the Front Office tier, so we evaluate the customer's Bullhorn edition during scoping. For Front Office Growth/Enterprise, Evaluations map to a Bullhorn Custom Object (customObject2) with numeric score fields, comment body, evaluator name, and timestamp. For Bullhorn ATS tier, Evaluations map to the Candidate Scorecard feature. Custom evaluation forms with non-standard field names require a pre-migration field-mapping table generated from the Yello export sample.

Yello

Pipeline Stage

maps to

Bullhorn ATS & CRM

Placement Pipeline Stage

lossy
Fully supported

Yello Pipeline Stages (configurable stage names and ordering) map to Bullhorn's Placement Track stages or to a Bullhorn Custom Object (customObject3) representing the customer's Yello-specific hiring workflow. Stage ordering is preserved by writing stages in ascending position order. We validate that the stage names in the export are supported by Bullhorn's jobStatus and placementStatus picklists or document any custom status values requiring Bullhorn Support to add.

Yello

Note

maps to

Bullhorn ATS & CRM

Note or Task (description)

1:1
Fully supported

Yello Notes (free-text commentary attached to Candidates or Requisitions) migrate to Bullhorn Note records linked via ContentDocumentLink to the parent Candidate or JobOrder. Note body migrates as plain text. Author and timestamp preserve. Bullhorn Note records display in the Candidate and JobOrder activity timeline alongside Tasks and Emails.

Yello

Tag

maps to

Bullhorn ATS & CRM

Tag

1:1
Fully supported

Yello flexible label system (Candidates tagged by school, degree, role, recruiting season) migrates to Bullhorn Tags. Bullhorn stores Tags as a separate entity linked to Candidate and JobOrder via the tag relationship. We extract the flat tag list from Yello and create corresponding Tag records in Bullhorn before attaching them to Candidates. Tags that do not exist in Bullhorn are created during migration.

Yello

Attachment

maps to

Bullhorn ATS & CRM

ContentDocument (Resume)

1:1
Fully supported

Binary files associated with Candidates including resumes, cover letters, and portfolio items migrate as Bullhorn ContentDocument records attached to the Candidate via ContentDocumentLink. The original filename and file blob preserve. Bullhorn's resume parsing runs on ingestion, extracting structured fields (skills, experience, education) from the uploaded document. We migrate the blob first, then trigger Bullhorn's parse action if enabled on the customer's tier.

Yello

User

maps to

Bullhorn ATS & CRM

User (Owner)

1:1
Fully supported

Yello internal recruiter and admin user accounts map to Bullhorn User records. We resolve by email match. Owner references on Candidate, JobOrder, and other records migrate by resolving the Yello user ID to the Bullhorn User ID via the User mapping table. Any Yello user without a matching Bullhorn User goes to a reconciliation queue for the customer's admin to provision before record import resumes.

Yello

Custom Fields (Candidate-level)

maps to

Bullhorn ATS & CRM

Candidate custom fields or Custom Object

lossy
Fully supported

Yello custom Candidate properties discovered during the discovery phase map to Bullhorn Candidate custom fields (standard field type: text, number, date, picklist, checkbox) or to a Bullhorn Custom Object (customObject1) if the customer's edition limits standard custom fields. We generate a field-mapping table covering field name, data type, and target Bullhorn field API name before any data writes. Custom field discovery must complete before migration scoping because missed custom fields appear as unmapped blanks in Bullhorn and require a correction pass.

Yello

Custom Fields (Requisition-level)

maps to

Bullhorn ATS & CRM

JobOrder custom fields or Custom Object

lossy
Fully supported

Yello custom Requisition properties map to Bullhorn JobOrder custom fields or to a Bullhorn Custom Object (customObject4) if the destination edition limits standard JobOrder extensions. Multi-select picklist values from Yello map to Bullhorn picklist fields with values created in advance via Bullhorn Support if the values do not already exist in the target org's value set.

Yello

Requisition-Candidate Association

maps to

Bullhorn ATS & CRM

JobSubmission

1:1
Fully supported

The many-to-one relationship between Yello Requisitions and Candidates (a Candidate can apply to multiple Requisitions) maps to Bullhorn JobSubmission records. Each JobSubmission links a Candidate to a JobOrder and captures application status, submission date, and source. We preserve the application status from Yello (Applied, Screening, Interview, Offer, Rejected) as JobSubmission status values.

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.

Yello logo

Yello gotchas

High

No documented public API forces export-based migration

Medium

Custom field discovery must happen before migration scoping

Low

Event multi-day structure requires flattening during export

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

  • Yello has no documented public API for extraction

    Yello does not publish a public API according to available documentation. We cannot pull data via authenticated API calls. Instead, we work from Yello's structured CSV exports and manual data dumps, which requires explicit guidance from Yello support on how to generate a full data export. The export may not include the full object graph—for example, Event attendance records, nested Evaluations, or multi-day Event date ranges may require multiple export passes or manual extraction steps. We scope the migration around what the export can reliably deliver and flag any objects that require manual re-entry in Bullhorn before migration begins.

  • Bullhorn Custom Objects require Bullhorn Support ticket setup

    Bullhorn Custom Objects cannot be created through the standard UI by end users. The customer or their Bullhorn representative must submit a support ticket with a completed Custom Object Setup Sheet (XLSX template from kb.bullhorn.com) before custom migration schemas can be deployed. Bullhorn ATS tier limits Custom Objects to 2; Front Office Growth/Enterprise supports 10. If the migration requires more Custom Objects than the purchased edition allows, we scope custom fields onto the standard Candidate and JobOrder entities instead, which have no explicit custom field count limit but require careful API field type mapping. We submit the Custom Object Setup Sheet during the configuration phase on the customer's behalf.

  • Multi-day Campus Events require date-range flattening

    Yello Campus Events can span multiple days and venues. The standard Yello export represents a multi-day Event as a single record with a start date and end date rather than as separate daily records. We parse the date range, split into individual day records, and write each as a separate Event in Bullhorn. If the destination Bullhorn org supports a parent Event linkage (via Custom Object or custom field on Event), we preserve the parent Event ID for reporting. Without explicit parent Event support in Bullhorn's standard Event object, the flattened daily Events are treated as independent records with a shared custom parent reference field.

  • Yello custom field discovery must complete before migration scoping

    Yello allows custom Candidate and Requisition fields, but without a documented schema API we cannot programmatically discover the full custom field list in advance. We request a sample data export or screenshots of all configured custom fields during the discovery call. Any custom fields missed during discovery appear as unmapped blanks in Bullhorn and require a correction pass with a new export from Yello. We recommend the customer involve whoever configured the Yello custom fields during discovery to ensure no fields are overlooked.

  • Bullhorn field-level security and validation rules can block import

    Bullhorn orgs commonly enforce validation rules and field-level security that can reject records during data load even when the migration user has appropriate permissions. Required format validation, conditional required fields, and picklist whitelist enforcement can cause 5-30 percent record rejection on first import attempt. We coordinate with the customer's Bullhorn admin to grant the migration user appropriate permissions before load and either temporarily disable blocking validation rules during migration or extend them with a migration-context check that bypasses validation for records with a migration-source flag.

Migration approach

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

  1. Discovery and export coordination with Yello

    We audit Yello's configured objects: Candidate schema (standard and custom fields), Requisition schema, Event list (with multi-day date ranges noted), Evaluation forms, Pipeline Stage definitions, Tag taxonomy, Attachment volume, and user list. We request a full data export from Yello support and validate the export completeness against the object list. Any objects not included in the first export pass (for example, nested Evaluations or Event attendance records) are flagged and a second export pass is requested. We also confirm the customer's Bullhorn edition and submit the Custom Object Setup Sheet to Bullhorn Support if the migration scope requires Custom Objects beyond the Bullhorn ATS tier's limit of 2.

  2. Bullhorn schema design and Custom Object provisioning

    We design the destination Bullhorn schema. This includes standard custom fields on Candidate and JobOrder, Custom Objects (customObject1s-customObject10s) with all required fields per the Custom Object Setup Sheet, Tag definitions, and Pipeline Stage configurations. Bullhorn's Field Mappings feature controls where fields display on Add/Edit pages; we configure these during schema design so that migrated fields land in the correct sections of the Bullhorn UI. Schema is validated in a Bullhorn sandbox org before production deployment. Bullhorn Support typically turns around Custom Object provisioning within 5-10 business days.

  3. Sandbox migration and reconciliation

    We run a full migration into the customer's Bullhorn sandbox using production-like data volume from the Yello export. The customer's recruiting operations lead reconciles record counts (Candidates in, JobOrders in, Events in, Evaluations in, Attachments in), spot-checks 25-50 random records against the Yello source for field accuracy and tag fidelity, and reviews the multi-day Event flattening output. Sign-off on the sandbox migration gates production migration. Any field mapping corrections, custom field additions, or Event splitting logic adjustments happen here.

  4. Owner reconciliation and User provisioning

    We extract every distinct Yello user referenced on Candidate, Requisition, Event, Evaluation, and Note records and match by email against the Bullhorn destination org's User table. Yello users without a matching Bullhorn User go to a reconciliation queue. The customer's Bullhorn admin provisions missing Users (active or inactive depending on whether the original Yello user is still with the organization). Migration cannot proceed past this step because OwnerId references are required on most Bullhorn standard objects.

  5. Production migration in dependency order

    We run production migration in record-dependency order: Tags (reference data), Users (validated), Custom Objects (with Bullhorn Support-provisioned schemas), JobOrders (from Yello Requisitions), Candidates (with Tag associations and OwnerId resolved), JobSubmissions (linking Candidates to JobOrders), Events (multi-day flattening applied), Evaluations (to Bullhorn Scorecard or Custom Object per edition), Notes (as Bullhorn Notes with ContentDocumentLink), and Attachments (as Bullhorn ContentDocument with ContentDocumentLink to Candidate). Each phase emits a row-count reconciliation report before the next phase begins. Bullhorn's REST API handles standard object writes; Bulk API 2.0 is used for Attachments and large custom object batches.

  6. Cutover, validation, and automation rebuild handoff

    We freeze Yello write access during cutover, run a final delta migration of any records modified during the migration window, then enable Bullhorn as the system of record. We validate record counts against the Yello export totals, check a random sample of migrated Candidates against source profiles, and confirm all Attachments are retrievable in Bullhorn. We deliver the Yello automation inventory document (workflow triggers, stage progression rules, event-based actions) to the customer's Bullhorn admin with a mapping to Bullhorn's workflow engine equivalents. We support a one-week hypercare window where we resolve any data quality issues raised by the recruiting team. Workflow and automation rebuilds are out of scope for the data migration and require a separate Bullhorn implementation engagement.

Platform deep dives

Context on both ends of the pair

Yello logo

Yello

Source

Strengths

  • Specialized campus recruiting Event management with registration tracking and multi-day scheduling
  • LinkedIn Recruiter integration with real-time profile data refresh via LinkedIn CRM Connect
  • Centralized Candidate profile with sourcing, engagement history, and pipeline stage tracking
  • Branded career page and candidate communication tools for enterprise employer branding
  • FedRAMP Authorized government variant available for regulated recruiting environments

Weaknesses

  • No public API documented, limiting programmatic data export and integration options
  • No customization options reported for workflow or field configuration
  • Missing free trial and opaque enterprise pricing structure
  • Limited mobile platform parity compared to desktop functionality
  • Narrow focus on early talent and campus recruiting may not fit broader hiring needs
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 Yello 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

    Yello: Not publicly documented. Yello's API is enterprise-focused and operates under customer-specific service agreements rather than a public per-minute quota..

  • Data volume sensitivity

    A

    Yello exposes a bulk API — large-volume migrations stream efficiently.

Estimator

Estimate your Yello 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 Yello to Bullhorn ATS & CRM data migrations

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

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Most migrations land between four and seven weeks for organizations under 10,000 Candidates, 500 Requisitions, and straightforward Event structures. Migrations with multi-day Campus Events requiring date-range flattening, large evaluation histories, custom field schemas spanning multiple Custom Objects, or Bullhorn editions requiring Custom Object setup through Bullhorn Support move to nine to fifteen weeks. The Bullhorn Support turnaround for Custom Object provisioning (5-10 business days) adds non-overlapping lead time before the custom schema phase begins.

Adjacent paths

Related migrations to explore

Ready when you are

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