Open Source Merge Alternatives
A curated collection of the 1 best open source alternatives to Merge.
The best open source alternative to Merge is Nango. If that doesn't suit you, we've compiled a ranked list of other open source Merge alternatives to help you find a suitable replacement.
Merge alternatives are mainly AI Development Platforms but may also be Integration Platforms. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Merge.
An integration platform that handles auth, execution and observability for 900 plus APIs, for teams shipping product integrations.
Nango is a platform for building product integrations against more than 900 APIs. The repetitive half of any integration, meaning OAuth flows, token refresh, credential storage and multi-tenant connection management, is handled for you, leaving the logic specific to your product as the only thing left to write.
Three primitives cover every pattern the platform supports.
- Auth: managed OAuth, API keys and token refresh, with a white-label connect flow you embed in your app.
- Proxy: authenticated requests routed through Nango, which resolves the provider, injects credentials and handles retries and rate limits.
- Functions: TypeScript integration logic deployed to a runtime with API access, retries, storage and observability built in.
An AI builder generates those functions from a description of the use case, and what comes out is readable TypeScript you review, edit and commit rather than a black box. Full type safety and a testing framework come with it.
On top of those pieces, teams build data syncing for RAG pipelines and indexing, webhook processing, API unification onto a schema of their own, actions that write on a user behalf, per-customer configuration, and tool calling that lets AI agents act on external APIs.
Nango is fully operable from a CLI and API and works with any backend language, AI coding tool or agent SDK. It carries the Elastic License, with free self-hosting on a limited feature set and the full set on Cloud or Enterprise self-hosted, and it reports SOC 2 Type II, HIPAA and GDPR compliance.
