Best Open-Source Alternatives
to Calendly in 2026

Your AI second brain. Self-hostable. Get answers from the web or your docs. Build custom agents, schedule automations, do deep research. Turn any online or local LLM into your personal, autonomous AI (gpt, claude, gemini, llama, qwen, mistral). Get started - free.

Privacy first, AI meeting assistant with 4x faster Parakeet/Whisper live transcription, speaker diarization, and Ollama summarization built on Rust. 100% local processing. no cloud required. Meetily (Meetly Ai - https://meetily.ai) is the #1 Self-hosted, Open-source Ai meeting note taker for macOS & Windows. Understand How to write meeting minutes

Lightweight server monitoring with historical data, docker stats, and alerts.

Self-Hosting Guide. Learn all about locally hosting (on premises & private web servers) and managing software applications by yourself or your organization. Including Cloud, LLMs, WireGuard, Automation, Home Assistant, and Networking.

List of ngrok, Cloudflare Tunnel, Tailscale, and ZeroTier alternatives and other tunneling software and services. Focus on self-hosting.

Mealie is a self hosted recipe manager and meal planner with a RestAPI backend and a reactive frontend application built in Vue for a pleasant user experience for the whole family. Easily add recipes into your database by providing the url and mealie will automatically import the relevant data or add a family recipe with the UI editor

🕳 bore is a simple CLI tool for making tunnels to localhost

Ekko Studio is a local-first AI workspace for multi-agent chat, coding, and visual workflows, available on desktop and the web.

The truly free, open-source, local-first, cross-platform CapCut replacement. Scriptable through a JSON-RPC API & MCP.

~95% on SimpleQA (e.g. Qwen3.6-27B on a 3090). Supports all local and cloud LLMs (llama.cpp, Ollama, Google, ...). 10+ search engines - arXiv, PubMed, your private documents. Everything Local & Encrypted.

A beautiful, private, local-first personal finance tracker. Investments, net worth, spending, and simulations.

🧱 easy, fast, programmable and local-first microVM runtime and library

Desktop app to generate 3D models from images or prompt using local AI — runs entirely on your GPU

Fast and lightweight DNS proxy as ad-blocker for local network with many features

Calibre-Web but Automated and with tons of New Features! Fully automate and simplify your eBook set up!

Open-source and local-first Slack and Notion alternative that puts you in control of your data

Main engine of the IronCalc ecosystem

A native Android audio player that combines multi-source streaming, local control, rich lyrics, and self-hosted sync. / ✨ 一个把多源在线播放、本地管理、歌词体验和自建同步做进原生 Android 的音频播放器 🎵

Bird frame for Raspberry Pi or your homelab - real-time bird detection by audio, fully local AI, rendered as real, hand-cut 1800s bird illustrations. On an e-ink panel, a TV, or any screen.

Open-source AI coding assistant for VS Code. Coding agent, code completion, chat, edits and reviews with local or hosted models. Your models, your infrastructure.

☁️ Ultra-fast, secure & lightweight self-hosted cloud storage — your files, photos, calendars & contacts, all in one place. Built in Rust.

本地私有、开源的自进化跨平台 AI 内容发现 Agent：先理解你，再主动从 B站、小红书、抖音、YouTube、X、知乎、Reddit、微博等平台与开放 Web 寻找内容。（支持 deepseek harness 插件） | Local-first open-source cross-platform AI content discovery agent: understands you, then proactively finds content across Bilibili, Xiaohongshu, Douyin, YouTube, X, Zhihu, Reddit, Weibo and the open web.（support deepseek harness plugin）

IM Chat, High-performance, scalable, self-hosted instant messaging server in Go — private chat, groups, chatrooms, WebSocket and REST APIs.

Local-first desktop widget for tracking token usage, costs, limits, and session activity across 46+ AI coding tools—including Claude Code, Codex, Cursor, OpenCode, OpenClaw, and more—with multi-device sync.

🌊 AChat - An open-source/self-hosted/local-first AI platform, designed for enterprises and teams, perfectly combining powerful local processing capabilities with seamless remote synchronization.

Expose local http, tcp or websocket connections to the public internet

Terraform module for scalable GitHub action runners on AWS

Web application that indexes all popular torrent sites, and saves it to the local database.

A curated list of awesome platforms, tools, practices and resources that helps run LLMs locally

OpenRecall is a fully open-source, privacy-first alternative to proprietary solutions like Microsoft's Windows Recall. With OpenRecall, you can easily access your digital history, enhancing your memory and productivity without compromising your privacy.

Open-source, self-hosted file-processing tool. Convert, compress, OCR, transcribe & run local AI across image, video, audio, PDF & documents, via UI, REST API & pipelines. Your files never leave your network.

Local-first bookkeeping for iOS/Android/Web · Self-hosted cloud + iCloud/WebDAV/S3 sync · AI capture · MCP | 本地优先的跨端记账 · 自建云 + iCloud/WebDAV/S3 同步 · AI 记账 · MCP

Self-hosted database backup manager with a web UI. Schedule, backup, and restore MySQL, PostgreSQL, MariaDB, Microsoft SQL Server, MongoDB, SQLite & Redis to S3, SFTP, Samba or local storage. SSH Tunnel support.

The all-in-one local AI studio for your desktop: chat, image and video generation and a coding agent in one free, open source app. Windows and Linux. No Docker, no terminal, no cloud required.

Fast, local-first web content extraction for LLMs. Scrape, crawl, extract structured data — all from Rust. CLI, REST API, and MCP server.

Build AI (or any) apps with scalable microservices & microfrontends.

Self-hosted realtime soundscape analyser for birds, bats and other wildlife. Multi-model local AI inference, runs 24/7 on a Raspberry Pi.

A Python framework for self-hosted LLM tool-calling and multi-step agentic workflows

Run AI models locally on your machine with node.js bindings for llama.cpp. Enforce a JSON schema on the model output on the generation level

A Telegram RSS bot that cares about your reading experience (calling for new maintainers: https://github.com/Rongronggg9/RSS-to-Telegram-Bot/issues/747)

Ready-to-run Docker Compose stacks for 120+ self-hosted apps, each with a Tailscale sidecar and automatic HTTPS

Swing Music is a beautiful, self-hosted music player for your local audio files. Like a cooler Spotify ... but bring your own music.

Automatically login and find available free games the Epic Games Store. Sends you a prepopulated checkout link so you can complete the checkout after logging in. Supports multiple accounts, login sessions, and scheduled runs.

Text-To-Speech, RAG, and LLMs. All local!

Local AI app and inference engine for agents. Run open-weight LLMs locally — private, 100% offline on your computer. Join our Discord: https://discord.com/invite/8wGSsvmg4V

Local-first Video Knowledge Base. Index your video library with multi-modal analysis (YOLO, DeepFace, Whisper), search semantically via natural language, Docker-ready.

A native macOS AI chat app powered by MLX. 100% local inference on Apple Silicon, no cloud required. Built with ShipSwift.

Self-hosted family planner - tasks, calendars, shopping, meals, budget. Your data, your server.

Automatic Tailscale reverse proxy for Docker containers. Zero sidecars. Label-based config. Automatic HTTPS.

Self hosted ingress-as-a-service platform that allows you to expose applications and services running in private or local networks to the internet

🎙️ AI Dictation App - Open Source and Local-first ⚡ Type 3x faster, no keyboard needed. 🆓 Powered by open source models, works offline, fast and accurate.

Open-source video pipeline (clipper, script-to-video & more) — scout trends, clip long videos, generate captioned shorts, design motion graphics. Local-first, BYOK. AGPL-3.0.