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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Daily notes app that puts project notes, tasks, Apple Calendar events and Reminders side by side for planning each day.

Since 2020

Subscription · Notes and knowledge · Individuals and families

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Markdown app for Mac and iOS to write, keep notes and publish them as a static blog.

One-off payment · Website builders · Individuals and families

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Lets teams building AI agents run simulations, evaluate outputs and trace failures in production.

Free plan · Developer tools · Developers

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Collects traces, metrics and logs through OpenTelemetry for engineering teams, hosted or on your own servers.

Since 2022

Free trial · Uptime and monitoring · Developers

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Converts PDF files into Markdown, keeping tables and turning equations into LaTeX, with DOCX and PDF export.

Free plan · Documents and e-signature

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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 small app that slides in from the screen edge so you can jot notes and tasks and plan your day without switching apps.

Projects and tasks · Individuals and families

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A plain, ad-free blog host for writers who want markdown posts, RSS and email subscribers on their own domain.

Free plan · Newsletters · 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

0

A Markdown notes app for developers with encrypted sync, plugins and an API that coding agents can use.

Subscription · Notes and knowledge · Developers

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A Mac notes app that keeps notes as plain Markdown text files in folders you choose, with links between notes.

Free · Notes and knowledge · 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

0

A simple self-hosted wiki that stores markdown pages in git, with file attachments and full page history.

Free · Notes and knowledge

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An editing dashboard for Markdown and MDX kept in your GitHub repo, so clients can update static sites without Git.

Since 2022

Free plan · Website builders · Agencies

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Paste or upload HTML and get clean Markdown back, in the browser or through an API.

Since 2024

Developer tools · Creators and writers

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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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Write product documentation and user manuals in Markdown and publish them as a website, PDF or eBook.

Free plan · Website builders · Software companies

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Small text app for jotting and keeping short notes, synced via iCloud to iPhone, iPad, Watch and Mac.

Notes and knowledge · Individuals and families

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An API that crawls whole websites and returns tidy markdown for teams feeding RAG systems or training models.

Since 2024

Free plan · Developer tools · Developers

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Traces AI agent runs in production, flags silent failures and lets teams test changes in simulation before release.

Since 2025

Free plan · Uptime and monitoring · Developers

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Watches your AI agent's real traffic, finds where it fails customers and opens tested pull requests with fixes.

Since 2026

Subscription · Uptime and monitoring · Developers

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Tracing and anomaly alerts for AI agent pipelines, so developers catch failures they were not watching for.

Free plan · Uptime and monitoring · Developers

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Tracks cost, calls and errors in AI apps and agents through OpenTelemetry, either self-hosted or on their managed cloud.

Subscription · Uptime and monitoring · Developers

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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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A free desktop notes app that keeps each note as a local Markdown file, with one box to search, create and link notes.

Since 2026

Free · Notes and knowledge · Individuals and families

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A fast desktop notes app with blocks, Markdown, images and task boards, storing notes locally first.

Free · Notes and knowledge · Individuals and families

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Focused writing app with a clean Markdown editor, for writers who want fewer distractions.

Free trial · Notes and knowledge · Individuals and families

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Observability for logs and traces that answers questions in Slack and drafts fix pull requests when alerts fire.

Free plan · Uptime and monitoring · Developers

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Hosted blog service where you write in Markdown or HTML, add your own CSS and JavaScript, and publish under your own domain.

Since 2026

Website builders · Individuals and families

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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.

Free plan · Developer tools · Developers

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An observability backend on ClickHouse that takes logs, metrics, traces and profiles and lets teams query them in Grafana.

Free plan · Uptime and monitoring · Developers

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Free notes app that keeps journals, checklists and linked ideas as private Markdown files, with a chat-style capture box.

Since 2026

Free · Notes and knowledge · Individuals and families

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Ties logs and traces from iOS and Android apps to backend services so app teams can trace a user problem to its cause.

Uptime and monitoring · Developers

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Notes app for developers and ops engineers where shell, code, SQL and prompt blocks in Markdown run in place and print results below.

Since 2026

Free · Developer tools · Developers

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A light Markdown notebook that keeps notes on your device, with optional sync and AI models that run locally.

Since 2026

One-off payment · Notes and knowledge · Individuals and families

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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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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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Traces AI coding agent runs, spots where they fail and enforces rules that stop repeat failures as they happen.

Since 2026

Free plan · Uptime and monitoring · Developers

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A self-hosted knowledge base that serves Markdown files as searchable, editable docs for teams.

Free · Notes and knowledge

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Simple blog hosting with no ads or tracking: write in markdown and drag files in to publish, for a small monthly fee.

Subscription · Website builders · Individuals and families

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Drop in papers, notes and transcripts and an AI agent files them into a cited, linked markdown wiki you keep.

Since 2026

Notes and knowledge · Individuals and families

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Real time editor where teams write shared markdown files together, see each other's cursors and keep past versions, no Git needed.

Notes and knowledge

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Browser LaTeX and Markdown editor where researchers write papers together, manage references and track AI help.

Free plan · Documents and e-signature · Individuals and families

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Collects traces, logs, metrics and session replays from OpenTelemetry for $39 a month, with EU hosting or self-hosting.

Subscription · Uptime and monitoring · Developers

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A shared Markdown editor where teams and coding agents write documents and build small internal tools stored in git.

Developer tools · Developers

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Tracks the AI agents a company runs in production, showing their costs, flagging leaked personal data and enforcing usage rules.

Since 2026

Uptime and monitoring · Developers

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Stores and queries logs, metrics and traces on object storage at low cost, as a managed cloud or on your own servers.

Since 2026

Uptime and monitoring · Developers