API Infrastructure Open Source Tools

Alternative toHookdeck

Webhook platform with delivery guarantees, retries, and signing

• 3,457 GitHub stars
• MITLicence MIT

Alternative toPortkey

LLM proxy with API translation and multi-backend routing

• 3,413 GitHub stars
• Apache-2.0Licence Apache-2.0
• #LLM

Alternative toAmazon S3

Decentralized S3 storage with end-to-end client-side encryption

• 3,282 GitHub stars
• AGPL-3.0Licence AGPL-3.0

Alternative toWHMCS

Self-hosted billing for hosting providers, MIT licensed

• 2,770 GitHub stars
• MITLicence MIT

Alternative toAlgolia

Hybrid search and RAG infrastructure for AI knowledge bases

• 2,721 GitHub stars
• MITLicence MIT

Alternative toAlgolia

Open source personalization and search ranking engine

• 2,454 GitHub stars
• Apache-2.0Licence Apache-2.0
• #LLMOps

Alternative toApigee

Build, document, and monetize APIs from one self-hosted platform

• 2,127 GitHub stars
• Apache-2.0Licence Apache-2.0

Alternative toFirebase

Self-hosted backend with real-time API and search built in

• 1,668 GitHub stars
• Apache-2.0Licence Apache-2.0
• #BaaS

Alternative toAmplitude

Open source analytics infrastructure powered by ClickHouse

• 1,662 GitHub stars
• MITLicence MIT

Alternative toWorkOS FGA

Run fine-grained authorization with RBAC, ABAC, and ReBAC

• 1,335 GitHub stars
• Apache-2.0Licence Apache-2.0