No moat. Still in business.

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Wholesale ordering portal for brands that sell to retailers, handling B2B orders, stock levels and invoices.

Since 2014

Online shops · Shops and retail

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Tracks billable hours for agencies and freelancers, then builds invoices that clients can pay by card.

Since 2011

Free trial · Invoicing and billing · Agencies

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Upload a PDF and fax it to numbers in 50 countries, paying per fax, with an email when it goes through.

Since 2017

Pay as you go · Documents and e-signature

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Writers keep their past posts and notes in one library, draft social posts from it, and schedule them to X, LinkedIn and more.

Since 2021

Subscription · Marketing and social · Creators and writers

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Gives you a forwarding address that turns email newsletters into ebooks and sends them to your Kindle, Kobo or reMarkable.

Since 2024

Free plan · Focus and productivity · Individuals and families

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Adds a shopping cart and checkout to an existing website, blog or link page so you can sell products without a new store.

Since 2022

Subscription · Payments and checkout · Online sellers

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Builds and publishes a small business website from a few answers, with AI writing the copy and you paying for each page

Free plan · Website builders

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Booking software for tour and activity operators with payments, QR check-in and availability synced to over 70 OTAs.

Free trial · Scheduling and booking · Hotels and hospitality

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Pulls sales, customer and product data from stores and payment gateways into one set of reports for online sellers.

Subscription · Website analytics · Online sellers

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Sits in front of your server to receive webhooks from Stripe, Shopify and others, logging each one so missed events can be resent.

Free plan · Developer tools · Developers

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WordPress plugin for creating, selling and running online courses with quizzes and certificates.

Free plan · Courses and learning · Creators and writers

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WordPress plugin for adding price estimate calculators to a site, emailing PDF quotes and collecting leads from service customers.

Free plan · CRM and sales · Trades and home services

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Free self-hosted app for small businesses to send quotes and invoices, track client payments and take card payments online.

Free · Invoicing and billing

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WordPress plugin for making invoices and quotes as PDFs and taking payment through Stripe or PayPal.

Free plan · Invoicing and billing

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Czech payment gateway with no monthly fee for e-shops, ticket sellers and towns, taking cards, transfers and QR.

Pay as you go · Payments and checkout · Online sellers

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Lets online stores run their own affiliate program, with commission tracking, a branded portal and PayPal payouts.

Marketing and social · Online sellers

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A WordPress plugin that connects Indian and global payment gateways to shop, form, course and donation plugins.

Payments and checkout

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A WordPress booking calendar for daily rentals that takes reservations and payments and syncs with other booking sites via iCal.

Scheduling and booking · Property and estate agents

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Invoicing for freelancers and small firms: branded invoices and quotes, online payment links and automatic reminders.

Free plan · Invoicing and billing

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Lets WooCommerce shop owners add, remove, reorder and hide the fields customers fill in at checkout.

Free plan · Online shops · Online sellers

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Manages file downloads on WordPress with password and access controls, download tracking, and options to sell digital products.

Free plan · Online shops · Online sellers

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WordPress plugin for listing events on a calendar, taking registrations, selling tickets and checking guests in.

Free plan · Scheduling and booking · Events

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WordPress plugin that pulls in RSS feeds to show as lists, publish as posts, or rewrite with AI for news and content hubs.

Subscription · Website builders · Creators and writers

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WordPress plugin that adds Buy Now buttons so site owners can take PayPal and card payments in a popup checkout.

Free · Payments and checkout · Online sellers

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Lets you write quotes and invoices inside WordPress, turn quotes into invoices and take payment by PayPal.

Free plan · Invoicing and billing · Agencies

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A WordPress plugin that adds an appointment booking form and calendar to a business website, with paid add-ons for SMS and payments.

Free plan · Scheduling and booking

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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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Lets creators build and sell online courses, paying a fee per enrolled student instead of a monthly plan.

Since 2026

Pay as you go · Courses and learning · Creators and writers

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A free WordPress plugin for taking one-off and recurring payments through buy buttons, payment forms and invoices.

Free plan · Invoicing and billing

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An unofficial API, CLI and MCP server that lets Substack writers draft, schedule and publish posts outside the editor.

Since 2026

Subscription · Newsletters · Creators and writers

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Free WooCommerce plugins that connect a store to Stripe, PayPal or Braintree to accept cards and other methods.

Free · Payments and checkout · Online sellers

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Converts published articles into narrated audio with an on-page player that highlights words, for publishers and newsletters.

Since 2026

Free plan · Video and audio · Creators and writers

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Runs an affiliate program inside WooCommerce using coupon codes and referral links, with dashboards and commission payouts.

Free plan · Online shops · Online sellers

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Builds WordPress forms in the block editor, Elementor or Bricks, including multi-step, calculator, payment and login forms.

Forms and surveys

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A WordPress plugin to build signup and login forms, user profiles and free or paid memberships with restricted content.

Forms and surveys · Creators and writers

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Chess clubs, tournament directors and coaches handle registrations, pairings, members and payments in one place.

Since 2026

Free plan · Scheduling and booking · Schools and tutors

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A WordPress plugin that lets shops sell subscriptions with trials, plan changes and a customer portal, for a 1% fee.

Free · Payments and checkout · Online sellers

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WordPress plugin that connects over a hundred payment gateways to WooCommerce and similar plugins without code.

Payments and checkout · Online sellers

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A WordPress plugin that takes room bookings, handles rates and payments for hotels, B&Bs and rentals.

Free plan · Scheduling and booking · Hotels and hospitality

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A WordPress plugin that turns a site into a members area with login, registration and restricted content.

Free plan · Communities and memberships

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WordPress form plugin for taking Stripe or PayPal payments, signed waivers and bookings right inside the form.

Free plan · Payments and checkout

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Free WordPress plugin for publishing events and taking bookings, with custom signup forms, waiting lists, calendars and online payments.

Free · Scheduling and booking · Charities and nonprofits

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Payment gateway for Polish online shops taking BLIK, instant transfers, cards and PayPal, with plugins for shop platforms.

Pay as you go · Payments and checkout · Online sellers

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For founders without a dev team: describe an app and get a hosted, working version with sign in and payments, editable visually.

Since 2023

Free plan · Website builders

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WordPress booking form for restaurants with table management, deposits and SMS alerts, and no per-booking commission.

Free plan · Scheduling and booking · Restaurants and cafés

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WordPress store plugin for selling physical items, digital files and subscriptions, taking payment by Stripe, Square or PayPal.

Free plan · Online shops · Restaurants and cafés

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A WordPress plugin that locks posts, pages and downloads behind paid or free memberships, with Stripe and PayPal checkout.

Free plan · Communities and memberships · Creators and writers

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WordPress plugin for building forms, surveys and payment forms, with links to CRMs, email tools and Stripe.

Subscription · Forms and surveys