Merge
Unified API for HRIS, ATS, CRM, and accounting integrations - 3,000+ B2B SaaS companies including BILL and Drata replace 60+ integration builds with one API.
Merge is a unified API platform that lets product teams add integrations across HRIS, ATS, CRM, accounting, ticketing, file storage, and marketing automation categories by building against a single normalized API instead of individual integrations for every platform. Founded in 2020 by Shensi Ding and Gil Feig in New York, Merge raised $55 million in a Series B round in 2023 and serves 3,000+ B2B SaaS customers including BILL, Drata, Navan, and Ramp. The platform normalizes data models across 220+ integrations - covering Workday, ADP, BambooHR, Greenhouse, Lever, Salesforce, HubSpot, QuickBooks, and Xero - so application code only ever deals with one employee schema, one candidate schema, and one deal schema regardless of which specific platform the customer uses. Merge Link provides a pre-built embeddable UI component that handles OAuth, API key, and credentials authentication for end users without requiring frontend engineering from the integrating product team.
Key Features
- Unified HRIS API normalizes employee and payroll data from 60+ platforms including Workday, ADP, BambooHR, Rippling, and Gusto into a single data model
- Unified ATS API covers Greenhouse, Lever, Ashby, Workable, and 40+ applicant tracking systems through standardized candidate, job, and application endpoints
- Unified CRM API connects Salesforce, HubSpot, Pipedrive, and 30+ CRMs with normalized contact, deal, company, and activity objects across all platforms
- Merge Link pre-built UI component handles OAuth and API key authentication for end users in an embeddable modal - no frontend engineering required per integration
- Automatic field mapping normalizes custom fields from each platform to a common schema so application code never needs platform-specific data transformation logic
- Webhook delivery forwards real-time sync events from any integrated platform to the application endpoint with standardized event payloads across all platforms
- Integration observability dashboard shows sync health, error rates, and data freshness per customer connection for support team debugging and proactive monitoring
Use Cases
- B2B SaaS products adding HRIS integrations to sync employee data from Workday and ADP by building against one Merge API instead of 60 separate integrations
- Fintech companies connecting to QuickBooks, Xero, and Sage accounting systems through one unified endpoint for financial data aggregation across customer accounts
- Recruiting platforms adding ATS integrations to pull candidate and job data from Greenhouse and Lever without separate engineering projects per system
- Enterprise software companies replacing a fragmented integration backlog with a single Merge implementation that covers the HRIS, ATS, and CRM category landscape
Pros
- One API implementation covers 60+ HRIS platforms - eliminates building and maintaining separate integrations for Workday, ADP, and BambooHR as individual projects
- Merge Link pre-built auth UI removes the most error-prone and time-consuming part of integration UX from the engineering scope entirely
- 3,000+ customers including publicly traded companies confirm Merge handles the edge cases and rate limit behavior of enterprise HRIS and ATS APIs at scale
Cons
- Professional plan pricing at $800/month is only cost-effective for B2B SaaS companies with multiple paying customers actively using integrations in production
- Normalized data model cannot expose every custom field from every platform - products needing deep platform-specific data may hit schema coverage limitations
- Merge sits between the customer and the integrated platform - adding a third-party data dependency that must be factored into reliability SLA planning and incident response
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