Merge API
Merge grades A+: self-serve signup, the first three production linked accounts free, published pricing, official SDKs in six languages, webhooks, and public docs across seven unified categories. Higher tiers gate advanced features, not core access.
Frequently asked questions
Merge scores A+ on the API Report Card. Merge grades A+: self-serve signup, the first three production linked accounts free, published pricing, official SDKs in six languages, webhooks, and public docs across seven unified categories. Higher tiers gate advanced features, not core access.
Merge has a workable official integration path. Most engineering teams can build against it directly. Open API: self-serve, documented, with SDKs
Merge is a unified API platform founded in 2020 that lets B2B software companies ship customer-facing integrations by building against one API.
Software and data tools. A SaaS vendor embeds Merge Link in its product so customers can connect their own HRIS, ATS, CRM, accounting, ticketing, or file storage systems; the vendor then reads and writes normalized objects through Merge's unified endpoints, subscribes to webhooks for changes, and relies on Merge to maintain the underlying vendor integrations.
Merge is the best-known name in the unified API category. More than 2,500 companies including TripActions, Ramp, Drata, AngelList, Deed, and Apollo were using it at its Series B, it reported 30x ARR growth that year, and it has raised $75M total from Accel, NEA, and Addition.
Merge stores synced copies of its customers' end-user data (employee rosters, candidates, invoices, tickets, files) in its sync-and-store architecture, but it is an integration layer rather than a system of record; the authoritative data lives in the connected source systems.
Founded 2020 by Shensi Ding and Gil Feig. Modern API-first stack: REST endpoints over normalized common models, official SDKs in Python, Node.js, Java, Ruby, Go, and C#, built-in webhooks, sandbox environments, and a drop-in authorization component.
Reviewers note per-linked-account pricing gets expensive at scale, and feature gating pushes teams to the Professional tier. A reviewer reported initial CRM syncs taking days; data freshness depends on scheduled sync frequency in the sync-and-store model. Full sourced list under Sources below.
Common alternatives include Finch, Apideck, Kombo, Unified.to, Nango. Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.