No moat. Still in business.

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A shared POSIX file system for Linux and Mac servers that stores its data in S3 or other object storage, with no storage cluster to run.

Since 2015

Subscription · Developer tools · Developers

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An iPhone app that takes Japanese learners from beginner to fluent with one new sentence per flashcard and spaced review.

Since 2015

Courses and learning · Individuals and families

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Free desktop app that backs up your encrypted files onto friends' computers while you store theirs in return.

Since 2021

Free · Security and passwords · Individuals and families

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Tracks stocks, crypto, property and private investments across brokers, with returns analysis and data encrypted on your device.

Since 2024

Free plan · Money and budgeting · Individuals and families

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An open-source photo and video library you run on your own server, with animated previews, search and browser playback.

Since 2024

Free · Video and audio · Individuals and families

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Log every flight you take on your own server, see routes on a world map and get travel stats.

Free · Travel · Individuals and families

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Send large files and secrets through encrypted links that expire, carry passwords and show when the recipient downloads them.

Since 2025

Subscription · Documents and e-signature

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A desktop app on top of rclone to browse, sync, mount, encrypt and back up files across 70 plus cloud storage services.

Since 2025

Free plan · Something else

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Self-hosted notes and checklists app that keeps everything as Markdown files on your server, with kanban boards.

Free · Notes and knowledge · Individuals and families

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Copy text, links or files on one device and paste them on another, with end to end encryption.

Since 2025

Free plan · Focus and productivity · Individuals and families

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Self-hosted time tracker for teams that turns logged hours into PDF invoices, with roles, reports and audit trails.

Free · Invoicing and billing · Agencies

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Mac app for checking and managing Linux servers: stats, services, Docker, files and cron jobs through a visual interface.

Since 2025

Free plan · Uptime and monitoring · Developers

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A browser extension that saves and highlights words you look up on web pages, then drills them with flashcards.

Since 2020

Free plan · Courses and learning · Individuals and families

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Flash card app for learners to keep their own word lists and practise them with spaced repetition on Apple devices.

Courses and learning · Individuals and families

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Tool for running a home server that installs and updates hundreds of self-hosted apps from a dashboard.

Free · Developer tools · Individuals and families

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Helps intermediate language learners reach fluency through spoken chats with an AI tutor, corrections and daily articles.

Courses and learning · Individuals and families

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Ad-free app that teaches children aged 3 to 14 one of 19 languages through listening, speaking and reading along.

Since 2024

Free plan · Courses and learning · Individuals and families

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A light Mac app that runs Docker containers, Kubernetes and Linux machines as a Docker Desktop replacement.

Since 2023

Developer tools · Developers

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Stores encrypted passwords, crypto keys and instructions and releases them to your chosen people if you stop checking in.

Since 2024

Free plan · Security and passwords · Individuals and families

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Browser extension that swaps sentences on the pages you read into the language you are learning, scaled to your level.

Since 2024

Subscription · Courses and learning · Individuals and families

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Mobile app where learners practise speaking a new language with AI characters and get pronunciation scores.

Since 2024

Courses and learning · Individuals and families

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Listening drills that help language learners catch spoken numbers, phone numbers and clock times in over two dozen languages.

Courses and learning · Individuals and families

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Push a Docker image and get a public HTTPS link, so developers can share demos, bots and side projects quickly.

Free plan · Developer tools · Developers

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A Docker app with a web interface for setting up Nginx reverse proxies and auto-renewing SSL certificates.

Free · Developer tools · Individuals and families

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Backs up files on Windows PCs and Macs as encrypted, versioned copies to a cloud account or disk that you own.

Free trial · Security and passwords · Individuals and families

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Teaches English, Spanish, French and other languages through song lyrics, with spaced repetition for new words.

Since 2024

Courses and learning · Individuals and families

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Flashcard maker that schedules reviews by spaced repetition, with dictionaries and text to speech for language learners.

Since 2024

Free plan · Courses and learning · Individuals and families

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Learn to read Arabic with alphabet lessons, graded stories and flashcards that schedule reviews around your memory.

Since 2026

Free plan · Courses and learning · Individuals and families

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Live voice lessons with an AI language tutor that corrects mistakes as you speak and remembers your past sessions.

Since 2026

Free trial · Courses and learning · Individuals and families

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A language app that translates words offline, saves them to your own tagged word list and helps you review them with flashcards.

Since 2025

Courses and learning · Individuals and families

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An app for practising spoken conversations in 10 languages with an AI partner, then chatting with native speakers with translation.

Since 2026

Free plan · Courses and learning · Individuals and families

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Learn any of 75 or more languages from almost any starting language, including rare ones, with a school option too.

Free plan · Courses and learning · Individuals and families

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Graded Japanese stories at your JLPT level, with tap-to-define words, grammar notes, audio and flashcards.

Since 2026

Subscription · Courses and learning · Individuals and families

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A language app where a partner or friend fills in words, audio and sentences for you to study, on iPhone and Android.

Since 2025

Courses and learning · Individuals and families

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A Chrome extension that translates X and Reddit posts and quizzes you on new words, for people learning English.

Since 2026

Subscription · Courses and learning · Individuals and families

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Send files and folders of any size straight to your own devices or to other people, with transfers that resume after drops.

Free · Something else · Individuals and families

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Phone app for learning a language by listening to native podcasts with synced transcripts and tap-to-translate words.

Since 2025

Subscription · Courses and learning · Individuals and families

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AI language teacher that runs group or private lessons with homework and practice talks in nine languages, for learners.

Since 2025

Free plan · Courses and learning · Individuals and families

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An app for learning Japanese with an AI tutor, speaking roleplays, kanji, quizzes and a personal study plan.

Since 2026

Free plan · Courses and learning · Individuals and families

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A Mac clipboard history app with a Touch ID lock, encrypted history, text grabbing from images and reusable snippets.

One-off payment · Security and passwords · Individuals and families

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An iPhone, iPad and Mac app that sends files of any size as end-to-end encrypted links that recipients open in a browser.

Since 2026

Something else · Individuals and families

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Connect a Git repo and every push gets built and served as a live app with its own HTTPS address, for developers.

Free plan · Developer tools · Developers

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Short Spanish stories pitched at the words an A2 to B1 learner already knows, with unknown words brought back for review.

Since 2026

Free plan · Courses and learning · Individuals and families

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Learn Japanese or Korean by tapping words in YouTube videos, manga and books, with flashcards that track what you know.

Since 2025

Free plan · Courses and learning · Individuals and families

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Save new words from what you read or watch, get AI definitions and examples, then review them with FSRS flashcards on Apple devices.

Since 2025

Free plan · Courses and learning · Individuals and families

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Video player for language learners that shows two subtitle tracks at once, generates subtitles and translates them live.

Free · Video and audio · Individuals and families

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Keeps environment variables and secrets for all your projects encrypted in one place and loads them from the terminal.

Since 2026

Subscription · Security and passwords · Developers

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A language learning app for 77 languages where every lesson ends with you saying the sentence aloud and getting feedback.

Since 2026

Free plan · Courses and learning · Individuals and families