Self-hosted projects tagged “API”

Self-hostable workflow automation platform combining a visual builder with JavaScript/Python code steps, 400+ integrations, and AI-assisted automation.

Actively maintained

Alternative to:

Zapier+17

Ollama is a local LLM runtime that lets you pull, run, and customize models, offering a CLI and REST API for chat, generation, and embeddings.

MITActively maintained

Alternative to:

OpenAI API+15

Open-source PDF platform to edit, convert, OCR, sign, redact, and automate PDF workflows via a web UI and REST API.

Actively maintained

Alternative to:

Adobe Acrobat+19

Hoppscotch Community Edition is an open-source API development and testing tool for REST, GraphQL, WebSocket, SSE, MQTT, and Socket.IO with collections and environments.

MITActively maintained

Alternative to:

Postman+9

Apache Superset is an open-source BI platform for SQL-based data exploration, interactive dashboards, and rich visualizations with a no-code chart builder and SQL editor.

Apache-2.0Actively maintained

Alternative to:

Apache Superset (Managed Cloud)+18

Open-source headless CMS for building customizable content APIs with an admin UI, supporting REST/GraphQL and multiple databases.

Actively maintained

Alternative to:

Strapi Cloud+16

reveal.js is an open source HTML presentation framework for building interactive slide decks with HTML, Markdown, and JavaScript, including speaker notes and PDF export.

MITActively maintained

Alternative to:

Adobe XD

Prometheus is an open-source monitoring and time-series database for collecting metrics, querying with PromQL, and alerting on system and application health.

Apache-2.0Actively maintained

Alternative to:

Datadog Cloud Monitoring+17

AnythingLLM is an all-in-one desktop and Docker app for chatting with documents using RAG, running AI agents, and connecting to local or hosted LLMs and vector databases.

MITActively maintained

Alternative to:

AnythingLLM Cloud+19

Open-source Airtable alternative that turns Postgres/MySQL/SQLite into a no-code spreadsheet UI with views, permissions, integrations, and REST APIs.

Actively maintained

Alternative to:

Airtable+10

Memos is a lightweight, privacy-first self-hosted note-taking service with Markdown, fast search, and sharing features for personal notes, wikis, and team knowledge.

MITActively maintained

Alternative to:

Memos Cloud+19

MinIO is a high-performance, S3-compatible object storage server for building private cloud storage, data lakes, and scalable storage backends for applications.

AGPL-3.0Slowing down

Alternative to:

Amazon S3+7

Open-source, self-hostable PaaS to deploy websites, full-stack apps, databases, and Docker services on your own servers with Git-based CI/CD workflows.

Apache-2.0Actively maintained

Alternative to:

Heroku+12

Penpot is an open-source UI design and prototyping platform with real-time collaboration, design systems support, and developer-friendly inspect mode with CSS/SVG/HTML output.

MPL-2.0Actively maintained

Alternative to:

Figma+6

Meilisearch is a lightning-fast search engine API for apps and websites, offering typo-tolerant full-text search plus vector and AI-ready hybrid retrieval.

Actively maintained

Alternative to:

Algolia+16

Appwrite is an open-source backend-as-a-service for building web and mobile apps with authentication, databases, storage, functions, realtime APIs, and messaging.

BSD-3-ClauseActively maintained

Alternative to:

Firebase+4

Jellyfin is a free, self-hosted media server to organize, manage, and stream movies, TV, music, and photos to web, mobile, and TV clients.

GPL-2.0Actively maintained

Alternative to:

Plex+19

Twenty is an open-source CRM alternative to Salesforce with customizable data models, views, permissions, and workflow automation for sales and customer management.

Actively maintained

Alternative to:

Salesforce Sales Cloud+18

Ghost is an open-source publishing platform for blogs and websites with built-in newsletters, membership management, and paid subscriptions.

MITActively maintained

Alternative to:

Ghost(Pro)+13

Mastodon is an open-source, ActivityPub-compatible social network server for microblogging, offering federated timelines, moderation tools, media support, and APIs.

AGPL-3.0Actively maintained

Alternative to:

Threads+7

Run LLMs, image, and audio models locally with an OpenAI-compatible API, optional GPU acceleration, and a built-in web UI for managing and testing models.

MITActively maintained

Alternative to:

OpenAI API+19

Self-hostable scheduling software for appointments and bookings with customizable booking pages, availability rules, reminders, and integrations for teams and developers.

MITActively maintained

Alternative to:

Calendly+12

RSSHub generates RSS/Atom/JSON feeds for thousands of sites and services that don’t provide feeds, exposing them as subscribable endpoints you can self-host.

AGPL-3.0Actively maintained

Alternative to:

RSS.app+1

Hyperswitch is an open-source payments switch and orchestrator that connects multiple payment processors through a single API, with modules for routing, vaulting, retries, and reconciliation.

Apache-2.0Actively maintained

Alternative to:

Spreedly+8

Cobalt is a self-hostable web media downloader for saving publicly accessible videos and audio from supported social platforms via a simple paste-a-link interface and API.

AGPL-3.0Actively maintained

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iTubeGo+4

ToolJet is an open-source low-code platform to build and deploy internal tools, dashboards, and workflows with integrations for databases, APIs, and SaaS apps.

AGPL-3.0Actively maintained

Alternative to:

Retool+19

Build and deploy internal tools, admin panels, and dashboards with a low-code UI builder that connects to databases and APIs and supports JavaScript logic and Git workflows.

Apache-2.0Actively maintained

Alternative to:

Retool+14

Novu is an open-source notifications platform with a unified API, workflow orchestration, and embeddable in-app inbox for email, SMS, push, and chat.

Actively maintained

Alternative to:

Novu Cloud+4

Self-hostable product analytics platform with web analytics, session replay, feature flags, experiments, and data warehouse/CDP capabilities.

Actively maintained

Alternative to:

Mixpanel+19

Lightweight web-based platform to manage Docker, Swarm and Kubernetes resources with a GUI and API, including access control and multi-environment operations.

ZlibActively maintained

Alternative to:

Portainer Business Edition (Portainer Cloud)+6