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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A fast shared wiki where teams keep documents, notes and project boards together.

Since 2016

Projects and tasks

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Build hosted or embedded checkout pages to sell products, subscriptions, tickets and services through your own Stripe account.

Since 2018

Free plan · Payments and checkout · Online sellers

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A company wiki where teams write, organise and search shared docs and policies, with search across linked tools.

Since 2020

Free plan · Notes and knowledge

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Open-source billing engine that meters usage, runs subscription and hybrid plans, and issues invoices for software firms.

Since 2021

Free · Invoicing and billing · Software companies

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An ecommerce platform with an API for selling products and subscriptions, with custom storefronts and checkout, for online brands.

Since 2021

Free trial · Online shops · Shops and retail

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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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A free knowledge base you run on your own server to publish help articles sorted into nested categories.

Free · Customer support

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A self-hosted forum with a shared library for clubs and communities who want discussions and know-how to stay findable.

Free · Communities and memberships

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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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Markdown document editor where teams and AI agents like Claude and ChatGPT write together live, with presentations and blog publishing.

Since 2026

Free plan · Documents and e-signature · Developers

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A wiki for SOPs, manuals and FAQs that sits in Microsoft Teams and answers staff questions from your own pages.

Since 2020

Subscription · Notes and knowledge

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Shared space where teams write docs and move the same pages across boards to track project status.

Free plan · Projects and tasks

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Saves videos, podcasts, PDFs and articles, summarises them, and lets you search and chat across what you saved.

Since 2022

Free plan · 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

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A free markdown notes app you run on your own server, with wikilinks, a graph view, diagrams, math and an MCP link for AI tools.

Free · Notes and knowledge · Individuals and families

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Searches your company's Slack, Drive, GitHub and other tools by permission and answers questions with links to the source.

Notes and knowledge

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Free self-hosted wiki that lets a team organise its documentation into shelves, books and pages.

Since 2022

Free · Notes and knowledge

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Help desk for SaaS companies with a shared inbox, knowledge base, AI replies and an in-app support widget.

Since 2024

Free plan · Customer support · Software companies

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A shared knowledge base for teams that flags stale docs and keeps company answers current for people and AI agents.

Since 2025

Free plan · Notes and knowledge

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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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Q&A site and knowledge base that teams can host themselves to collect answers to common questions.

Free · Customer support

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Keeps documentation in GitHub repos in step with the code and shares that context with teammates and AI coding agents.

Since 2026

Free plan · Developer tools · Developers

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Adds AI answers, tooltips and a help widget to your app, drawn from your help docs, to cut support tickets.

Free trial · Customer support · Software companies

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Saves what you work out in AI chats as searchable documents that Claude, ChatGPT, Cursor and other MCP tools can read later.

Since 2026

Free plan · Notes and knowledge · Developers

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Acts as merchant of record for software companies, handling subscriptions, usage billing, feature limits and global sales tax.

Pay as you go · Invoicing and billing · Software companies

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A Slack assistant that learns your company policies and answers staff questions, and helps onboard new hires.

Since 2026

Notes and knowledge

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A WooCommerce plugin that lets shops sell subscriptions, repeat deliveries and instalment plans, with dunning and cancellation flows.

Payments and checkout · Online sellers

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Adds usage limits, credits, plans and spend controls on top of Stripe so AI startups can change pricing without rebuilding billing.

Free plan · Payments and checkout · Developers

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A WordPress helpdesk plugin with support tickets, a knowledge base, a chatbot and AI help drafting replies.

Free plan · Customer support

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Billing for SaaS and AI companies that handles subscriptions, usage metering, quotes and invoices.

Free plan · Invoicing and billing · Software companies

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Collect links, screenshots, notes and files on a visual board, connect them with tags, and ask AI questions about them.

Since 2025

Free plan · Notes and knowledge · Individuals and families

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WordPress plugin for building a help center knowledge base, using AI to draft docs and answer visitor questions.

Free plan · Customer support · Software companies

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Adds recurring billing, trials, split payments and subscription boxes to WooCommerce stores.

Free plan · Payments and checkout · Online sellers

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Build a chat agent from your own docs and FAQs, test it, then put it on your site or WhatsApp to answer customers.

Free plan · Customer support

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A WooCommerce plugin for selling subscriptions, taking recurring payments and tracking renewals for online stores.

Free plan · Payments and checkout · Online sellers

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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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A hosted wiki that Claude, ChatGPT, Cursor and other AI agents share through MCP, so people can see and edit what the agents know.

Free plan · Developer tools · Developers

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Help desk that gathers email, chat, voice and social messages into one ticket queue, in the cloud or on your own servers.

Customer support

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Self-hosted docs and wiki software with templates, approval steps and read analytics for company know-how.

Free plan · Notes and knowledge

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WordPress plugin for writing and organising product docs, wikis and help centres, with search and an AI chatbot.

Free plan · Customer support

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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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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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Help desk software for support teams, with a shared inbox, live chat, a knowledge base and a phone line in one place.

Customer support

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Helpdesk plugin that runs support tickets inside WordPress, with an AI bot that answers from your own pages first.

Free plan · Customer support

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A WordPress plugin for publishing help docs and FAQs, with an AI chatbot and search that answer customer questions.

Customer support

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Help desk you install on your own servers, with a shared ticket inbox, a self-service article area and multi-brand support.

Free trial · Customer support