No moat. Still in business.

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Excel add-in for querying tables with SQL, scripting workbooks in C# and building custom Excel functions.

Since 2016

Free plan · Data and spreadsheets · Developers

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Make your own flashcard decks and review them on a spaced repetition schedule in the browser.

Since 2015

Free plan · Courses and learning · Individuals and families

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Open-source admin panel you point at your app's database to edit records, run custom actions and build SQL reports.

Since 2021

Developer tools · Developers

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Helps students sort courses, tasks, class schedules, flashcards and files into colour-coded folders.

Free · Focus and productivity · Individuals and families

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Send JSON events from your app with one request, then chart, query with SQL, set alerts and embed dashboards.

Since 2022

Free plan · Website analytics · Developers

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Fixes the mixed content and insecure content warnings a WordPress site shows after it moves to HTTPS.

Website builders

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Self-hosted tool to search, tail and chart logs and set alerts over data already in ClickHouse or VictoriaLogs.

Free · Uptime and monitoring · Developers

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Design dashboards for e-ink screens around your home and keep them updated, run on your own server or Home Assistant.

Since 2026

Free · Home and car · Individuals and families

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Gets and renews free Let's Encrypt SSL certificates on cPanel shared hosting without command line work.

Free plan · Security and passwords

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A note app for desktop and phone that records and transcribes, then answers questions using your own notes.

Since 2026

Notes and knowledge · Individuals and families

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Lets coding agents publish HTML reports and dashboards to a shareable link where people and agents can comment.

Documents and e-signature · Developers

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Desktop app where your own AI assistant builds and runs data workflows that join APIs, PDFs and spreadsheets on your machine.

Since 2024

Free · Automation and integrations

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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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Desktop data analysis app where you ask about your data in plain English and get Python code, charts and notebooks run on your computer.

Since 2017

Data and spreadsheets

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Lets data teams build reports and dashboards from SQL and markdown, with a hosted option and an agent for questions.

Since 2021

Data and spreadsheets · 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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Open-source business intelligence you host yourself, with a Malloy semantic layer, dashboards and an AI data analyst.

Since 2019

Free · Data and spreadsheets · Software companies

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Note app for students that builds flashcards, quizzes and summaries from notes and PDFs with spaced repetition.

Since 2021

Free plan · Courses and learning · Individuals and families

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A study app for students with spaced repetition flashcards, made from notes and PDFs, and scheduled around your calendar.

Free plan · Courses and learning · Individuals and families

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Spreadsheet that links to databases and files and lets AI write the formulas, Python and charts for you.

Since 2023

Data and spreadsheets

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A cloud workspace for creating, running and sharing marimo Python and SQL notebooks for data work

Since 2024

Developer tools · Developers

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A hosted version of Apache Superset for building dashboards, exploring data and embedding charts in your own apps.

Free plan · Data and spreadsheets

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No-code database where teams store and share structured data, then add apps, automations and dashboards on top.

Free plan · Data and spreadsheets

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Flashcard app that uses spaced repetition so learners review hard cards more often, with sync between devices.

Courses and learning · Individuals and families

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Connects to your business data and builds charts and dashboards, or replies to data questions asked in plain language.

Free plan · Data and spreadsheets

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A reading and study app that lets you clip from books and papers, link the clips in mind maps and review them as cards.

Courses and learning · Individuals and families

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Builds charts and business dashboards from your data when you describe them in plain English, so you skip writing SQL.

Since 2025

Subscription · Data and spreadsheets

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A desktop app to connect to 30+ databases, write or generate queries with your own AI keys, edit data and build dashboards.

Since 2026

Free trial · Developer tools · Developers

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

Free plan · Courses and learning · Individuals and families

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A web workspace where analysts write SQL over market prices, macro series and SEC filings, then chart the results without Python.

Since 2026

Subscription · Data and spreadsheets

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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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Upload an Excel sheet and publish it as a searchable, sortable web table or chart you can link to or embed.

Free plan · Data and spreadsheets

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Describe your business and get a shared database with forms, dashboards and an API that your team and AI assistants both use.

Since 2026

Free plan · Data and spreadsheets

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Records every AI agent decision in a signed, tamper-evident log so teams can show regulators what their AI did under the EU AI Act.

Since 2026

Free plan · Developer tools · Developers

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

Free plan · Courses and learning · Individuals and families

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Business intelligence tool built on dbt where data teams define metrics once and everyone builds charts, without paying per seat.

Subscription · Data and spreadsheets · Software companies

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A flashcard app that makes study cards from your PDFs, articles and photos and schedules reviews so you remember them.

Since 2026

Free plan · Courses and learning · Individuals and families

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A reading app for language learners that imports books, articles and videos, translates words and sends vocabulary to Anki.

Since 2026

Free · Courses and learning · Individuals and families

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Pulls survey answers, reviews and support chats into one place to chart them and code open text into themes.

Data and spreadsheets · Agencies

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Build database tables, entry forms, charts and dashboards inside the WordPress admin without code.

Free plan · Data and spreadsheets

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Runs versioned SQL and Python database migrations with dry runs, history checks and rollbacks, for Python teams.

Since 2026

Free plan · Developer tools · Developers

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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.

Courses and learning · Individuals and families

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BI tool that answers data questions with charts inside ChatGPT, Claude and similar assistants, saved for the whole team to use.

Since 2026

Free plan · Data and spreadsheets

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Learn English words from books you are reading, with ready-made flashcards, quizzes and a word bank.

Free plan · Courses and learning · Individuals and families

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Connect Claude or ChatGPT so they turn what you read into flashcards, then review them on any device.

Since 2026

One-off payment · Courses and learning · Individuals and families

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Reads your Anki flashcards aloud through headphones and grades your spoken answers, with an AI tutor for follow-up questions.

Since 2026

Free plan · Courses and learning · Individuals and families

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Hover over Chinese text in any Mac app to see pinyin, meanings and sentence breakdowns, and save words as flashcards.

Since 2026

Free plan · Courses and learning · Individuals and families

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Pools GPUs and CPUs from many cloud providers and your own servers so developers can run large data jobs in one place.

Since 2026

Developer tools · Developers