Bullhorn marketplace lists 300+ integration partners across sourcing, screening, communication, onboarding, and payroll. Setup depends on OAuth-authenticated API access, and most trigger-based tools rely on Bullhorn Automation, the workflow engine that fires an action when a candidate or placement record changes.
Popular integration categories include:
- Source and Attract: LinkedIn RSC syncs Recruiter and Bullhorn candidate data, notes, and InMail history both ways. hireEZ enriches and pushes sourced candidates into Bullhorn as prospects.
- Talent Acquisition, AI, and Automation: Skima AI automates candidate screening and ranking, providing explainable match scores and an unbiased shortlist. Glider AI adds structured skill tests and AI chatbot screening.
- Communication and Engagement: Ringover and Aircall both turn Bullhorn into a click-to-call interface, logging calls, texts, and AI summaries onto candidate records.
- Onboarding & E-Signatures: Click Boarding triggers onboarding workflows the moment a placement is made. Secured Signing handles electronic signature requests from a Bullhorn record.
- Payroll and Billing: Greenshades automates payroll, tax codes, and compliance from synced time data. PrismHR syncs employee and worksite data for full-service payroll.
Every connection depends on OAuth-based API access, and most rely on Bullhorn Automation to fire the trigger itself.
Bullhorn marketplace features over 300 integration partners. These partners cover sourcing, screening, communication, onboarding, and payroll. However, it’s more important to know which partners in each category have documented setup steps and real data flows. A listing tile doesn’t tell you what happens once you connect it.
This guide narrows that list down to the top 2 tools in each of Bullhorn's 5 categories. Across the list, you will find which data moves between the two systems, which action in Bullhorn triggers the connection, and the practical setup steps.
Overview: 10 Tools That Work with Bullhorn
Source and Attract
Sourcing and attraction focus on two main tasks: finding candidates and ensuring that those who apply through outside channels go directly into Bullhorn without retyping. The two tools below solve this from different sides. One connects an entire professional network's activity to Bullhorn, while another enriches and imports candidates from the open web.
1. LinkedIn RSC
Recruiter System Connect (RSC) links a LinkedIn Recruiter seat directly to Bullhorn, and Bullhorn stays the system of record while LinkedIn contributes context on top of it.
Once enabled, LinkedIn candidate profiles, InMail messages, and notes appear inside Bullhorn, and Bullhorn syncs any new, edited, or deleted Candidate, Job, or Submission record back out to LinkedIn.
InMail replies create a new Bullhorn candidate automatically if one does not already exist, provided the candidate is attached to a job and opts in to share contact details. A recruiter working a search in LinkedIn Recruiter can see at a glance which candidates are already in Bullhorn, which cuts down on the duplicate outreach that used to happen when sourcing and ATS data lived apart.
What syncs: Candidate profiles, InMail history, notes, jobs, and submissions.
How it triggers: Adding, editing, or deleting a Candidate, Job, or Submission record.
How It Connects
- Request RSC activation from your LinkedIn account
- Notify your Bullhorn Account Manager once approved
- Bullhorn Support completes the technical configuration
- Connect your Bullhorn login to LinkedIn Recruiter
- Set consent settings for eligible candidate syncing
2. hireEZ
hireEZ connects to Bullhorn through a Client ID and Secret that Bullhorn Support issues after an admin raises a support ticket requesting the integration. Once approved, recruiters can push candidates found through hireEZ's sourcing search directly into Bullhorn as prospects, or attach them straight to a specific job and stage.
The connection also works as a two-way check. hireEZ can flag which sourced candidates are in Bullhorn before a recruiter reaches out, avoiding duplicate records.
Additionally, push permissions are configured per team member, so an admin controls exactly who can write candidates into Bullhorn from hireEZ rather than opening that access to the whole desk.
What syncs: Candidate profile data, contact details, and job or stage assignment.
How it triggers: A recruiter pushing a sourced candidate from hireEZ.
How It Connects
- Raise a Bullhorn support ticket for hireEZ
- Receive Client ID and Secret from Bullhorn
- Enter credentials inside hireEZ's integration settings
- Configure push permissions for each team member
- Push sourced candidates to Bullhorn as prospects
Talent Acquisition, AI, and Automation
This category covers tools that act on a candidate's data rather than just moving it, scoring, testing, or pre-qualifying before a recruiter spends time on a phone screen. The tools below connect directly to Bullhorn’s candidate and submission records. They write scores and structured results without needing a separate login.
The difference is what each one evaluates: one screens the resume itself, the other tests and interviews the person behind it.
3. Skima AI
Skima AI reads Bullhorn's Candidate, JobSubmission, Attachment, and Job records the moment a new submission comes in, then writes a 0 to 100 match score with reason bullets onto that submission record. Further, its skills detection feature flags the CVs with false skills, AI-generated content, and stuffed keywords to provide a high-quality shortlist without any bias.
Instead of a recruiter opening every resume that lands on a req, the ranked shortlist is already sitting in Bullhorn when they open the job.
The part that is specific to Bullhorn is the write-back path: a "Skima Screened" tag makes screened submissions easy to filter. Moreover, hiring managers can approve or skip candidates from a shortlist link, with their feedback recorded as a Bullhorn activity note for the audit trail.
What syncs: Match score, reason bullets, tags, and hiring manager feedback.
How it triggers: A new submission, stage change, or attachment added.
How It Connects
- Generate an OAuth key with read and write scopes
- Map custom fields for score, reasons, and feedback
- Enable webhook triggers for submission and stage events
- Test scoring on 2 to 3 requisitions
- Go live on pilot roles and track ROI
4. Glider AI
Glider AI connects to Bullhorn so recruiters can invite a candidate to a skill test, AI chatbot screen, or video interview directly from a Bullhorn record, instead of exporting a contact list into a separate portal. The invite draws from more than 450 supported skill areas and over 200,000 vetted questions to match the role's actual requirements.
Results, including a skill score, AI proctoring flags, and chatbot responses, are written back to the connected Bullhorn record so a recruiter can see fit and integrity signals without opening a second dashboard.
Staffing teams typically use this to filter out inflated resumes before a phone screen, since the AI proctoring step catches mismatches between claimed and demonstrated skills.
What syncs: Skill test scores, proctoring flags, and chatbot screening responses.
How it triggers: Inviting a candidate to a test or screen from Bullhorn.
How It Connects
- Activate Glider AI from the Bullhorn Marketplace
- Authenticate the connection with your Glider AI account
- Select skill tests or chatbot flows per job
- Invite candidates directly from their Bullhorn record
- Review scores and proctoring flags on return
Communication and Engagement
Bullhorn holds the candidate and client record, but the actual conversations, the calls, texts, and voicemails, happen inside a phone system that used to live in a separate tab. Both tools below close that gap by turning Bullhorn into a dialer and logging every interaction back to the right record automatically.
5. Ringover
Ringover turns Bullhorn into a click-to-call interface: activate the integration through an incognito browser session, and phone numbers on candidate and contact records become clickable. Calls, SMS, and WhatsApp messages log automatically as activities on the matching Bullhorn record once contact syncing is turned on.
Ringover's Empower AI layer adds transcripts, summaries, and mood cues on top of the raw call log, so a recruiter reviewing a candidate's Bullhorn record sees not just that a call happened but what was actually said.
Furthermore, international numbers need to follow a specific spacing format so Bullhorn can match the country code correctly, which is one of the more common setup snags.
What syncs: Call logs, SMS, WhatsApp threads, recordings, and AI summaries.
How it triggers: Any call or message made through Ringover's dialer.
How It Connects
- Open an incognito browser window before activating
- Enter your Bullhorn API username and password
- Map Ringover users to their Bullhorn accounts
- Activate contact synchronization between both platforms
- Confirm calls appear as Bullhorn activities
6. Aircall
Aircall's Bullhorn v4 integration uses Bullhorn's native click-to-call behavior, so clicking a phone number on a candidate, contact, or company record opens the Aircall workspace and starts the call.
At the end of each call, Aircall logs a note on the matching Bullhorn record, tagged with the call type, duration, and any tag the agent applied during the call.
Teams on the AI Assist add-on get call summaries and key topics written into that same note, so a recruiter scanning a candidate's activity feed gets the gist of a conversation without replaying the recording. Tag sync works only one way per call, since Bullhorn's Action field accepts a single value, so the first tag an agent applies is the one that gets recorded.
What syncs: Call notes, tags, SMS threads, and AI-generated summaries.
How it triggers: A call placed or received through an Aircall number.
How It Connects
- Confirm your Bullhorn account has note-edit permission
- Install the Aircall integration with OAuth authentication
- Select which Aircall numbers connect to Bullhorn
- Configure logging preferences and contact sync settings
- Verify phone number formats match supported patterns
Onboarding & E-Signatures
Once a candidate is placed, the paperwork starts: tax forms, policy acknowledgments, and often a signature on a contract before anyone shows up to work. The two tools below split that job cleanly.
One turns a Bullhorn placement into a structured employee onboarding workflow, while the other handles the actual signature capture on any document that needs one. Both trigger from a Bullhorn record change rather than a manual email attachment.
7. Click Boarding
Click Boarding's Bullhorn connection triggers from the placement record rather than a generic status field: once a placement is made, the integration transfers that data into Click Boarding and triggers the onboarding workflow assigned to that job or client. There is no separate export step for the recruiter, since the transfer happens automatically.
Candidates complete paperless forms (W-4s, I-9s, direct deposit, and any client-specific documents) inside Click Boarding, and progress status flows back so a recruiter can check where a new hire stands without leaving Bullhorn.
For agencies placing across multiple states or clients, workflows can be configured per client so the right region-specific paperwork goes out automatically.
What syncs: Placement data, candidate contact details, and onboarding progress status.
How it triggers: A new placement being made in Bullhorn.
How It Connects
- Contact Click Boarding to configure the Bullhorn connection
- Map onboarding workflows to specific jobs or clients
- Confirm placement data fields align with Click Boarding
- Test the transfer on a single pilot placement
- Monitor onboarding progress from the placement dashboard
8. Secured Signing
Secured Signing is listed as a native Bullhorn Marketplace partner. Once connected, a recruiter can send a document out for signature directly from a Bullhorn candidate or placement record. This eliminates the need to download, upload, and re-attach signed copies.
The "We Sign" flow allows multiple signers on the same document, which is helpful for contracts needing both a candidate's and a client's signature.
Signed documents and their status write back to the connected Bullhorn record automatically, so a recruiter can see at a glance whether a contract is out for signature, signed, or still pending, without checking a separate signing dashboard. Secured Signing also supports video signing and ID verification for agencies that need an extra compliance layer on higher-risk placements.
What syncs: Document status, signed files, and signer identity verification data.
How it triggers: Sending a document for signature from a Bullhorn record.
How It Connects
- Request Secured Signing activation through Bullhorn or directly
- Connect your Bullhorn user to a Secured Signing account
- Upload the document template to Secured Signing
- Send the signature invite from the Bullhorn record
- Track signing status from the Bullhorn dashboard
Payroll and Billing
Payroll for a staffing agency is more complex than for a standard business. Pay rates, bill rates, tax jurisdictions, and worksite locations can vary within one placement. The two tools below pull placement and time data directly from Bullhorn. They calculate pay, taxes, and billing without needing extra data entry.
The difference is the deployment model. One is a self-service payroll and tax engine, while the other includes full-service outsourced processing.
9. Greenshades
Greenshades payroll works on a one-way data flow from Bullhorn to Greenshades that starts with synced time data. Once a timesheet is approved in Bullhorn, it moves to Greenshades for payroll processing via a Workato-managed webhook. Closing a pay period in Greenshades triggers an export of employer costs and direct labour data for reporting.
For multi-state agencies, the key benefit is automatic tax code assignment. When a candidate's work location changes in Bullhorn, Greenshades updates their tax codes and accruals, like paid sick leave.
This ensures compliance with local rules, removing the need for a payroll admin to make manual changes. Payroll processing involves three steps: review synced time data, check deductions and taxes, and then submit ACH and general ledger files.
What syncs: Timesheet data, work location, tax codes, and employer costs.
How it triggers: Approving a timesheet or changing a work location in Bullhorn.
How It Connects
- Confirm your agency is live on Bullhorn One
- Work with Bullhorn Professional Services on configuration
- Map employee types to match Greenshades exactly
- Configure at least one pay schedule per employee
- Process payroll through the three-step review flow
10. PrismHR
PrismHR's Bullhorn Adapter is built into Bullhorn One Commercial Edition, and it moves employee and worksite location data from Bullhorn into PrismHR and back, so time, expense, and candidate information flow into payroll without a second data entry pass. Agencies can choose to process payroll themselves inside PrismHR or hand the whole cycle to PrismHR's outsourced payroll team.
Because PrismHR also handles benefits enrollment, ACA compliance, and workers' comp tracking, the Bullhorn Adapter gives agencies that grow into full-service HR outsourcing a single connected system rather than a second platform bolted on later.
Firms with several divisions running through one PrismHR instance get a single place to pull payroll and financial data across all of them.
What syncs: Employee records, worksite location, time, expense, and payroll data.
How it triggers: A placement or timesheet update inside Bullhorn One.
How It Connects
- Confirm your agency runs Bullhorn One Commercial Edition
- Request the PrismHR Bullhorn Adapter from Bullhorn
- Map employee and worksite location fields
- Choose self-service or full-service payroll processing
- Verify time and expense data flows into PrismHR
Behind the Bullhorn Connection System
Bullhorn's REST API authenticates through OAuth 2.0, and once authenticated, most marketplace partners on this list, from LinkedIn RSC to Skima AI to Greenshades, read and write against Candidate, Job, JobSubmission, and Placement records rather than working from a single universal trigger like a stage move.
One detail worth knowing is that Bullhorn's API does not support true outbound push webhooks. Instead, real-time updates rely on a poll-based Event Subscription API, where a connected app checks Bullhorn's queue for INSERTED, UPDATED, or DELETED events on the entities it cares about.
This is why the actual trigger layer for most of the tools on this list is not Bullhorn's raw API at all. Instead, it is Bullhorn Automation (formerly Herefish), Bullhorn's own workflow engine.
Automation watches for conditions, a placement status change, a timesheet approval, a work location edit, and triggers the outcome: calling a partner's webhook, updating a field, or sending a document. Skima AI's submission trigger and Greenshades' timesheet trigger both work through this layer.
3 Ways to Connect
1. API & Webhooks
Direct REST API access, authenticated with OAuth 2.0, is how partners like LinkedIn RSC, hireEZ, and PrismHR read and write Bullhorn records. Because Bullhorn's API is poll-based rather than push-based, most partners either poll the Event Subscription API on an interval or rely on Bullhorn Automation to fire outbound calls when a record changes.
2. No-Code Automation
Bullhorn Automation is the native workflow layer behind most of the trigger-based tools on this list, and it can call outbound webhooks or update fields based on conditions set inside Bullhorn itself, no separate platform needed. Zapier and airSlate offer additional no-code connectors for teams that want to link Bullhorn to tools outside the marketplace, such as DocuSign, without writing to the raw API.
3. Unified API Platforms
For agencies connecting Bullhorn to several other back-office or reporting systems at once, unified API and iPaaS platforms like Workato and StarfishETL handle the authentication and field-mapping work of connecting to Bullhorn's API a single time, then extend that same connection across every other system in the stack, which cuts down on maintaining one-off integrations.
Summary
The two best tools per category are a strategic decision, not a shortage of options. Bullhorn's marketplace features hundreds of sourcing tools, screening vendors, and payroll partners. Yet, only those with clear trigger mechanics and useful support articles are included in a staffing stack.
When building the Talent Acquisition, AI, and Automation layer, Skima AI's Bullhorn integration offers explainable match scoring on your existing submission records. You won’t need a new login or tab.
