Top Open Source Backend-as-a-Service (BaaS) Tools in 2026
A curated collection of the 14 best free and open-source Backend-as-a-Service (BaaS) tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
Inngest
Simplify backend processes with event-driven functions, seamless integrations, and powerful debugging tools for developers.
Stars5,766Last commit11d agoLicenseOpen SourceInstant
Instant is a database solution for building real-time and offline-enabled applications, simplifying the development of collaborative products.
Stars10,493Last commit12d agoLicenseApache-2.0
undb
Private first self-hosted no-code database & BaaS
Stars2,975Last commit14mo agoLicenseAGPL-3.0
Trigger
Open source platform for AI workflows in TypeScript
Stars16,137Last commit10d agoLicenseApache-2.0Rowy
Low-code backend for Firebase & Google Cloud
Stars6,833Last commit21mo agoLicenseOpen Source
PocketBase
Open source backend in a single file
Stars60,840Last commit13d agoLicenseMITHatchet
Durable orchestration platform for managing AI agents, scheduling background tasks, and running mission-critical workflows.
Stars7,797Last commit11d agoLicenseMITEncore
Automated infrastructure for humans and agents
Stars12,307Last commit11d agoLicenseMPL-2.0
Directus
Open source headless CMS & backend platform
Stars37,600Last commit12d agoLicenseOpen SourceConvex
Reactive backend platform for agents and apps
Stars12,435Last commit11d agoLicenseOpen Source
Bknd
Lightweight Firebase alternative built to run anywhere
Stars3,752Last commit5mo agoLicenseApache-2.0Supabase
Open source Postgres development platform
Stars108,474Last commit10d agoLicenseApache-2.0NHost
Managed backend platform with Postgres & GraphQL
Stars9,280Last commit11d agoLicenseMIT
Appwrite
Open-source backend server for web and mobile apps
Stars57,136Last commit10d agoLicenseBSD-3-Clause
