Merge

Merge is the leading unified API platform for B2B software: you integrate once against Merge's normalized data models and your customers get access to 150+ integrations across HRIS, ATS, accounting, CRM, file storage, ticketing, knowledge base, and chat. It handles the full integration lifecycle — initial build in weeks, then observability tooling so your customer-facing teams can monitor and manage integrations without engineering.

The model is developer-centric and headless: your team builds the UI, Merge provides the normalized API, webhooks, and sync infrastructure. Pricing starts with the first 3 production Linked Accounts free, then $650/mo for up to 10 accounts ($65 per additional), with Professional and Enterprise tiers on contract pricing. Compliance is enterprise-grade — SOC 2 Type 2, ISO 27001, GDPR, HIPAA-ready — and customers include names like BambooHR, Ramp, and Ema. A newer Agent Handler product exposes the same enterprise connectors to AI agents via REST and MCP, plus a consumption-based Gateway for BYOK token routing.

The main tradeoff versus real-time unified APIs is sync cadence: Merge syncs on a schedule that varies by plan rather than passing calls straight through, and costs scale linearly with linked accounts, so high-connection-count products should model the math early.

1. Create a Merge account and generate API keys for test and production.
2. Pick your categories (HRIS, ATS, Accounting, CRM, etc.) and test with Merge's sandbox data.
3. Integrate the Link component so your customers authenticate their third-party accounts.
4. Consume normalized data and webhooks in your app; monitor sync health in the dashboard.