Top Open Source API Infrastructure Tools in 2026
A curated collection of the 15 best free and open-source API Infrastructure tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
UnKey
Unified API platform for deployment and observability
Stars5,423Last commit11d agoLicenseOpen Source
Krakend
High-performance open source API gateway
Stars2,668Last commit17d agoLicenseApache-2.0
Gravitee
AI Agent Management platform for enterprise scale
Stars445Last commit10d agoLicenseApache-2.0WunderGraph
Open-source GraphQL Federation platform with governance
Stars1,256Last commit11d agoLicenseApache-2.0
Tyk
Open source API management platform & gateway
Stars10,806Last commit10d agoLicenseOpen SourceHive
A fully open-source schema registry, analytics, and gateway for GraphQL federation and APIs
Stars485Last commit10d agoLicenseMITNitric
Infrastructure from code for any cloud
Stars2,014Last commit7mo agoLicenseApache-2.0Netbird
Open source Zero Trust Networking platform
Stars28,678Last commit10d agoLicenseOpen Source
Mockoon
Create mock REST APIs in seconds
Stars8,381Last commit11d agoLicenseMIT
Zuplo
Unified gateway for APIs, AI, and MCP traffic
Stars—Last commitRecentlyLicenseOpen SourceUnified
Unified API & MCP platform for 837+ integrations
Stars—Last commitRecentlyLicenseOpen SourceTerraform
Infrastructure as code for any cloud
Stars—Last commitRecentlyLicenseOpen SourceNHost
Managed backend platform with Postgres & GraphQL
Stars9,280Last commit11d agoLicenseMITKong
Unified API and AI connectivity platform
Stars44,063Last commit1mo agoLicenseApache-2.0
Imagine.dev
Open-source backend server for web & mobile apps
Stars57,189Last commit6d agoLicenseBSD-3-Clause
