Open-source alternatives to Octodns

WePush is a multi-channel notification gateway and bulk message dispatcher designed to send personalized notifications across SMS providers, email, social platforms, and corporate communication channels. It functions as an enterprise messaging hub that routes notifications through a unified interface, including a centralized manager for multiple cloud SMS providers. The system includes a notification scheduling engine to trigger deliveries at specific future dates and times. It supports multi-account management, allowing users to switch between different service provider identities to send no

GoTrue is a JWT identity provider and user management API. It functions as an OAuth 2.0 compliant server that handles user registration and authentication while issuing signed JSON Web Tokens to control access to protected API resources. The service integrates external identity providers to allow users to sign in using third-party accounts. It also includes an SMTP notification service for delivering password resets, signup confirmations, and account recovery emails. The system covers broader capabilities for user account management, including the ability to update user profiles and manage c

Remotely Save is a cloud storage synchronization tool and backup manager designed to keep local files and application data consistent across desktop and mobile devices. It functions as a cross-platform synchronizer that mirrors local data to remote servers using S3 and other cloud protocols. The project focuses on privacy and security through end-to-end encryption, which secures files with a user-defined password before they are uploaded to remote cloud services. It ensures data remains private on third-party servers by applying symmetric client-side encryption. The system includes capabilit

Rainloop Webmail is a self-hosted, browser-based email application that connects to external mail servers using IMAP and SMTP protocols. It operates as a stateless client, fetching data directly from servers without requiring a local database to store messages. The system supports multi-account email management, allowing users to link multiple email identities to a single session for simultaneous access across different browser tabs. It includes a plugin-based extension system and tools for user interface customization and branding. The application provides capabilities for email workflow au

This project is a self-hosted email verification system and API designed to validate email existence and clean mailing lists on private infrastructure. It functions as a deliverability tool that confirms if email addresses are reachable by communicating with mail servers via the SMTP protocol without sending actual messages. The system is distinguished by its high-volume SMTP infrastructure, which utilizes a stateless worker architecture and message queue task distribution to scale validation tasks. It includes an SMTP proxy gateway that routes requests through SOCKS5 proxies to mask server i

iron-session is a stateless session management library for JavaScript that stores encrypted and signed session data directly in browser cookies. It functions as authentication middleware to verify user identity without requiring a server-side database or network lookups for session retrieval. The project provides a symmetric key encryption tool that supports versioned password rotation. This allows encryption keys to be updated across a system without invalidating active user sessions. Beyond session management, the library includes utilities to seal arbitrary data objects into secure signed

This project is a multi-purpose REST API utility collection and developer suite. It serves as a centralized service for real-time information aggregation, data transformation, and a wide array of programmatic tools. The service distinguishes itself by providing a broad range of specialized content delivery endpoints, from curated daily summaries and global trending rankings to randomized entertainment content like jokes and quotes. It also functions as a real-time aggregator for environmental and network data, including weather forecasts, currency exchange rates, and public IP lookups. The c

Backendlore is a collection of architectural guides and patterns for building stateless JSON HTTP APIs using Node.js. It focuses on designing backend systems that offload session and application state to external databases and in-memory stores to facilitate horizontal scaling. The project provides specific implementation standards for REST APIs, including request payload validation and the use of cryptographically signed cookies for session management. It details a strategy for file management that combines local filesystem caching for high-speed delivery with cloud object stores for long-ter

Falcon is a minimalist Python web API framework and high-performance microservices framework. It serves as a resource-oriented API toolkit designed for building RESTful APIs and data plane services that prioritize low overhead, reliability, and scale. The framework implements an ASGI web server interface to handle both synchronous and asynchronous HTTP requests and WebSockets. It features a dedicated HTTP middleware system for intercepting network traffic and executing shared processing logic across multiple API endpoints. Its capability surface covers resource-based routing, HTTP specificat

Pollinations is a generative AI content platform and model gateway that provides a unified multimodal API for producing text, images, audio, and video. It functions as an AI monetization framework, managing user wallets, spending limits, and revenue sharing for applications that integrate generative tasks. The platform includes a specialized web generator that transforms natural language prompts into functional single-page websites. It distinguishes itself by offering a stateless public API that allows for the generation of media and text via HTTP requests without requiring user authenticatio

No-as-a-Service is a lightweight, self-hosted API that returns a random humorous rejection reason as a JSON object through a single GET endpoint. It serves pre-defined rejection reasons from a static JSON array without any database, external storage, or third-party dependencies, using only Node.js built-in modules for its zero-dependency HTTP server. The API processes each request independently with no session state, caching, or persistent connections, making it a stateless REST endpoint. Its rejection reasons are stored in a simple, human-readable JSON configuration file that can be edited w

Blocky is a stateless DNS proxy that functions as a network-wide ad-blocker and content filter. It operates as a single binary or Docker container with no database or persistent state, accepting DNS queries over UDP, TCP, HTTPS, TLS, QUIC, and HTTP/3 through a unified plugin-based query pipeline. The core of the system is a client-group policy engine that assigns devices to named groups and applies per-group blocklists, allowlists, and upstream resolvers, with all configuration changes applied through hot-reloading without requiring a restart. The project distinguishes itself through its modu

This project is a multi-provider dynamic DNS client and synchronizer that monitors local IPv4 and IPv6 addresses and automatically updates DNS records across various cloud providers. It functions as an IP address monitoring tool and a network IP update webhook, ensuring that domain names remain pointed to current network addresses. The system distinguishes itself through a wide range of native provider integrations, including Cloudflare, AliDNS, DNSPod, Huawei Cloud, and HE.net. Beyond simple record updates, it allows for the management of CDN proxy status, TTL durations, and regional routing

Play is a full-stack reactive web framework for Java and Scala. It provides a comprehensive development platform for building scalable web applications and RESTful APIs using a stateless and non-blocking architecture designed for high concurrency. The framework emphasizes high-velocity development through dynamic code reloading, which allows developers to update applications and verify changes without performing a full restart. Its capability surface covers the construction of JSON-based web endpoints, server-side logic for the JVM, and the implementation of scalable web architectures.

This project is a containerized dynamic DNS update client designed to automate the synchronization of domain records with changing public IP addresses. It functions as a multi-provider synchronization engine that monitors network connectivity and updates DNS records across various cloud platforms and custom services to ensure consistent domain resolution. The system distinguishes itself through a provider-based adapter pattern that abstracts diverse third-party APIs into a unified interface, allowing for consistent record management. It employs multi-source IP discovery to mitigate rate limit

PostgREST is a standalone server process that automatically transforms a relational database schema into a fully functional RESTful API. By querying system catalogs at startup, it maps tables, views, and stored procedures into standardized web endpoints, allowing developers to build backend services by focusing exclusively on database design. The service functions as a declarative engine that translates HTTP requests and query parameters directly into native SQL operations. It maintains stateless request processing and integrates connection pooling to manage high-frequency interactions effici

Stirling-PDF is a web-based PDF management suite used for editing, merging, splitting, and converting PDF documents. It functions as a self-hosted document manager, providing a centralized interface for users to manipulate files on a private server. The system features a workflow automation engine that allows for the creation of processing pipelines to handle large volumes of documents without writing custom code. It also includes an optical character recognition tool to convert scanned PDFs into searchable and editable text. Access is managed through single sign-on integration and OIDC comp

ui-for-docker is a web dashboard and management interface for controlling and monitoring Docker containers. It provides a graphical alternative to the command line for visualizing the state of containerized workloads and administering Docker engines. The interface connects to the Docker daemon via local Unix sockets or remote TCP endpoints. It utilizes TLS certificates and keys to secure communication with remote engines and supports access restriction through HTTP basic authentication via a reverse proxy. The system operates as a stateless web frontend that translates user actions into requ

This project is a Model Context Protocol server that acts as an AI workspace connector, bridging large language models to Notion via its REST API. It provides a secure interface for AI assistants to read, write, and manipulate workspace pages, databases, and users. The server utilizes token-efficient markdown serialization to retrieve and update page content, reducing the amount of data processed by language models. It supports multi-user OAuth authentication, allowing the management of multiple Notion accounts within a single deployment by handling authentication tokens on a per-request basi

BrasilAPI is a REST API gateway that aggregates and exposes official Brazilian public data from fragmented government sources. It functions as a multi-provider data aggregator that normalizes heterogeneous information into a standardized JSON schema for consistent delivery. The system utilizes a multi-provider fallback pipeline to ensure reliable data resolution, querying several external APIs in sequence if a primary provider fails. It also incorporates a caching proxy gateway to reduce latency and avoid redundant requests for frequently accessed public data. The platform covers a broad ran

This project is a reference library of architectural blueprints, study materials, and design patterns for building scalable, high-availability distributed systems. It serves as a technical guide for scalability engineering, providing structural solutions for common engineering challenges. The repository focuses on distributed systems design, covering essential patterns for data replication, consensus algorithms, and transaction management. It distinguishes itself by offering detailed blueprints for specialized domains, including real-time data streaming, large-scale data storage, and high-ava

s2client-proto provides a set of structured data definitions and language-neutral communication protocols used to exchange information between an external client and the StarCraft II engine. It utilizes protocol buffer definitions to establish a binary serialization schema for these data exchanges. The project defines the underlying communication layer necessary for game engine automation, game state analysis, and the development of software agents for competitive gaming. The framework covers interface definition languages to ensure compatibility across programming languages and employs sche

FerretDB is an open-source database emulator and protocol translator that mimics a MongoDB environment to support existing drivers and client tools on a relational backend. It functions as a stateless database proxy that converts binary wire protocol messages into SQL statements, allowing a relational engine to handle document-oriented requests. The project serves as a migration tool for moving applications from MongoDB to PostgreSQL without rewriting queries or changing client drivers. It achieves this by using PostgreSQL as a document store, storing and querying BSON documents through a tra

omni-tools is a browser-based utility suite that provides client-side tools for manipulating PDFs, media files, and data formats. It functions as a collection of web-based processors and calculation engines that execute directly within the browser without requiring server-side processing. The suite includes a client-side PDF editor for merging, splitting, and reorganizing document structures, and a web-based media processor for resizing, trimming, and converting image and video files. It also features a data format converter that transforms structured information between JSON, CSV, and XML fo

snscrape is a Python-based social media web scraper and crawler designed to extract public posts, profiles, and hashtags from social networks without the use of official APIs. It functions as an archival tool and a utility for open-source intelligence data collection, allowing for the gathering of publicly available information to investigate trends and people. The tool facilitates social media data extraction for research and archival purposes, enabling the creation of historical records of conversations and user activity. It supports workflows for academic social analysis and the export of

This project is a Node.js client and database driver for Elasticsearch. It acts as a REST API wrapper that translates JavaScript method calls into HTTP requests to index, search, and manage documents within a distributed search and analytics engine. The library provides a programmatic interface for cluster management and data integration. It includes tools for discovering cluster nodes and managing indices to maintain connection stability and organize data storage. The client covers a broad range of operations, including document lifecycle management for CRUD actions, search query execution,

PostgREST is a standalone web server that automatically transforms a PostgreSQL database into a RESTful API. It serves as an API gateway that translates HTTP requests into SQL queries, mapping the database schema directly to endpoints without the need for manual route definitions. The system utilizes a JWT authentication layer to validate user identities and map incoming web requests to specific database roles. This allows the server to delegate authorization and permission enforcement to the internal PostgreSQL role system. It includes a generator for OpenAPI specifications to provide stand