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54 projects, sorted by GitHub stars.

DuckDB

Alternative toMotherDuck

Fast in-process SQL analytics database, no server needed

  • 42,470 GitHub stars
  • MITLicence MIT
  • #Database

Xray-core

Alternative toAstrill VPN

Open source proxy core with XTLS, VLESS, and REALITY protocols

  • 42,256 GitHub stars
  • MPL-2.0Licence MPL-2.0

Appsmith

Alternative toRetool

Build internal tools with a low-code drag-and-drop UI

  • 41,111 GitHub stars
  • Apache-2.0Licence Apache-2.0

Novu

Alternative toCourier

Open source notification infrastructure for product teams

  • 40,191 GitHub stars
  • MITLicence MIT

Directus

Alternative toContentful

Wrap any SQL database with REST and GraphQL APIs and an admin UI

  • 38,624 GitHub stars

nautilus_trader

Alternative toQuantConnect

Rust-native trading engine with research-to-live parity

  • 30,663 GitHub stars
  • LGPL-3.0Licence LGPL-3.0

Better Auth

Alternative toClerk

Drop-in TypeScript auth with MFA, SSO, and multi-tenancy support

  • 30,440 GitHub stars
  • MITLicence MIT

Bagisto

Alternative toShopify

Laravel eCommerce with headless API and no transaction fees

  • 28,271 GitHub stars
  • MITLicence MIT

Typesense

Alternative toAlgolia

Fast typo-tolerant search engine with instant results

  • 27,036 GitHub stars
  • GPL-3.0Licence GPL-3.0

Saleor

Alternative tocommercetools

Open source headless e-commerce platform with GraphQL API

  • 23,466 GitHub stars
  • BSD-3-ClauseLicence BSD-3-Clause

Yaak

Alternative toPostman

Local-first API client for HTTP, GraphQL, and WebSocket

  • 19,350 GitHub stars
  • MITLicence MIT

Keploy

Alternative toPostman

AI-powered tool that converts API traffic into test cases

  • 18,714 GitHub stars
  • Apache-2.0Licence Apache-2.0
  • #Testing
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