No moat. Still in business.

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Lets teams edit, test and send transactional email templates without code deploys, with A/B tests and analytics.

Since 2014

Subscription · Transactional email · Software companies

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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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Email marketing app for sending newsletters, campaigns and automated sequences, built for teams that write together.

Since 2018

Free plan · Email marketing · Online sellers

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An API that captures any web page as an image, PDF or markdown, with banner blocking and choice of country, for developers.

Free plan · 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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Handles in-app subscriptions for mobile apps, with a paywall builder, price tests and revenue reports for app teams.

Free plan · Payments and checkout · Developers

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Records visitor sessions on your site and uses AI to point out errors, rage clicks and drop-offs, alongside heatmaps.

Free plan · Website analytics

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Keeps running notes for regular meetings in shared workspaces, with flat team pricing instead of per seat.

Since 2025

Free plan · Notes and knowledge

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Create branded short links and QR codes, track clicks and route visitors by device or country, for marketing teams.

Free plan · Marketing and social

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Write slides in Markdown and the app handles layout, with PDF and PNG export on the paid plan.

Free plan · Design and images

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Write markdown and share it as a web page with custom links, passwords, expiry and an API.

Free plan · Documents and e-signature · Creators and writers

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An iPhone and iPad logbook for professional pilots that syncs across devices, builds flight stats and exports PDF logbooks.

Free plan · Something else · 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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Feature flag service that lets software teams roll out, test and switch off features in production without redeploying.

Subscription · Developer tools · Developers

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Turn app features on or off and roll them out to chosen users without redeploying, with unlimited team seats.

Free plan · Developer tools · Developers

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Free offline notebook app that keeps notes on your device with themes, PDF export and one-click backups, no account required.

Free · Notes and knowledge · Individuals and families

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WordPress plugin that pins a floating button to blog posts so bloggers get more clicks on offers and contact links.

Free plan · Marketing and social · Creators and writers

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Shows different text, popups or redirects to each WordPress visitor based on location, device or behaviour.

Free plan · Marketing and social

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Note app for iPhone, iPad and Mac that keeps a folder of Markdown files linked with wikilinks, backlinks and a graph, plus PDF export.

Since 2026

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

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WordPress plugin that records heatmaps, sessions, funnels and form drop-off, storing all data on your own site.

Free plan · Website analytics

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Chrome extension that saves your ChatGPT, Claude, Gemini and other chatbot chats as Markdown, PDF, Notion pages or Obsidian notes.

Free plan · Notes and knowledge · 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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A no-code popup tool for shops and websites to collect emails, show offers and win back visitors about to leave.

Free plan · Marketing and social

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Site analytics with split testing that shows which campaign, page or test version led to each sale, for online businesses.

Subscription · Website analytics

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A free native Mac editor for Markdown files that shows formatting in line as you type and works with plain files on disk.

Free · 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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Builder for landing and lead capture pages with templates, AI drafts and A/B testing to improve conversions.

Subscription · Website builders

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A free web Markdown editor for writing and sharing notes, with real-time collaboration, diagrams, math and PDF export.

Since 2026

Free · Notes and knowledge · Individuals and families

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Add one script to your site for widgets like local pricing, exit offers and social proof to lift sales.

One-off payment · Marketing and social · Online sellers

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Build a pre-launch waitlist page where signups earn rewards for referring friends, with emails and A/B tests.

Free plan · Marketing and social · Online sellers

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Agencies send proposals as branded links, see which parts clients read, collect signatures and export PDFs.

Free plan · CRM and sales · Agencies

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Keeps service and receipt records for cars, machines and tools, with reminders and fleet reports on Pro.

Free plan · Home and car · Individuals and families

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Feature flags for software teams to roll out changes to chosen users, watch error rates and roll back bad releases.

Free plan · Developer tools · Developers

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Cookie consent banners and consent records for websites and apps, so businesses meet GDPR and similar laws.

Free plan · Legal and compliance

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WordPress plugin that turns your posts and pages into PDFs, ePub ebooks and printable books.

Documents and e-signature · Creators and writers

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WordPress plugin to A/B test pages, watch session recordings and heatmaps, and track WooCommerce revenue by variant.

Free trial · Website analytics · Online sellers

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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

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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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WordPress plugin for publishers to place, rotate, target and schedule ads from any network and track clicks.

Free plan · Marketing and social · Creators and writers

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Builds sales and lead funnels inside WordPress and WooCommerce, with custom checkout pages, upsells and split tests.

Online shops · Online sellers

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Converts a recorded lecture into a chaptered book with the class figures, readable online or as PDF or ePub, for students.

Pay as you go · Courses and learning · Individuals and families

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A WordPress plugin for top bars and popups with countdowns, coupons and signup forms, plus click stats and A/B tests.

Free plan · Marketing and social

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Builds popups for online stores, such as signup offers, exit discounts and spin wheels, by describing them to an AI agent.

Free plan · Marketing and social · Online sellers

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Feature flags and remote config so software teams can release to user segments, run tests and switch features off fast.

Free plan · Developer tools · Developers

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Helps job seekers write a CV tailored to each role, check it against applicant tracking systems and export a PDF.

Free · Documents and e-signature · Individuals and families

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Lets marketing and design staff describe web app changes in plain English and get them as GitHub pull requests for engineers to review.

Free plan · Developer tools · Software companies

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Lets developers share live progress of scripts and jobs through a link, via an API or a tqdm replacement.

Uptime and monitoring · Developers