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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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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Run MATLAB-style code with automatic GPU speedups and live 3D plots, in the browser, on desktop or from the command line.

Free plan · Developer tools · 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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Build and A/B test pricing tables for your website without code, with Stripe revenue insights.

Since 2024

Free plan · Website builders · Online sellers

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Build popups, multi-step forms, quizzes and on-site widgets to collect leads and sales from website visitors.

Free plan · Forms and surveys

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Send documents out for e-signature and pay only for the ones that get signed, with three free each month.

Since 2024

Free plan · Documents and e-signature

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Keeps a searchable log of who changed what on a WordPress site and alerts owners by email or text about risky events.

Security and passwords

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

Since 2025

One-off payment · Marketing and social · Online sellers

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Records what happens on your WordPress sites in a hosted log and sends alerts by email or Slack, built for agencies.

Free trial · Uptime and monitoring · Agencies

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Helps business analysts turn messy data into repeatable analyses with a clear audit trail, without writing Python.

Since 2025

Data and spreadsheets

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Design, send and measure email campaigns and push messages, with a WooCommerce plugin for online shops.

Free plan · Email marketing

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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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Lets app and game developers change settings and run A/B tests remotely, without shipping a new build or waiting for store review.

Since 2024

Developer tools · Developers

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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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Watches what AI coding agents do across a company and turns your rules into policies that warn on or block risky actions.

Since 2026

Free plan · Security and passwords · Developers

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

Since 2026

Free plan · Marketing and social

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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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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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Feature flags and A/B tests that read results from your own data warehouse, for software product teams.

Free plan · Website analytics · Software companies

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WordPress plugin for building popups and bars with display rules, A/B tests and email signup capture.

Marketing and social

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

Since 2025

Free plan · Marketing and social · Online sellers

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An SDK and API that adds comments, approvals and audit trails to your app, so users can review AI output.

Since 2026

Free plan · Developer tools · Developers

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Review schema changes, approve data fixes and control who can query production databases across 20+ engines.

Subscription · Developer tools · Developers

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Describe a task in a sentence and get an automation workflow you can preview, cost out and approve before it runs.

Since 2025

Subscription · Automation and integrations

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Gives AI coding agents a team's architecture and security rules before they write code, with an approval trail for exceptions.

Since 2026

Free trial · Developer tools · Developers

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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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Open-source gateway that tracks spend, sets budgets and requires approvals for AI coding agents and their tool calls.

Since 2026

Free · Security and passwords · Developers

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Logs the files, processes and network calls AI coding agents touch on engineers' laptops, for security teams.

Since 2026

Security and passwords · Developers

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Secure store for customer personal data and sensitive files, with access control and audit logs, to help teams meet privacy rules.

Security and passwords · Health and clinics

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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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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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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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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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Send documents for legally binding e-signature from a web app or API, with a flat team price instead of per-seat fees.

Since 2026

Free plan · Documents and e-signature

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Checks and approves each command AI agents run on production servers and keeps an audit trail, for engineering teams.

Since 2025

Security and passwords · Developers

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Checks each action an AI agent tries, holds risky ones for approval, blocks destructive ones and keeps a receipt of each.

Since 2026

Free plan · Security and passwords · 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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Share passwords, API keys and env vars through encrypted links that expire after a set time or number of views.

Since 2026

Security and passwords

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WordPress agencies build a setup checklist once, send it to client sites, and guide staff through it in wp-admin with a log.

Free plan · Projects and tasks · Agencies

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Checks each AI agent action, like a shell command or API call, against policy and logs why it was allowed or blocked.

Since 2026

Free trial · Security and passwords · Developers

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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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Collect legally binding signatures on contracts inside your WordPress site, with templates and an audit trail.

Documents and e-signature

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Embedded engineers draw control logic as block diagrams, simulate and test it, then export C or Python code for their hardware.

Since 2026

Developer tools · Developers

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A hosted database that AI assistants share over MCP, keeping validated records and a history of who changed what.

Since 2026

Free plan · Developer tools · Developers

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Point any domain at any URL with automatic HTTPS, path rules and hit analytics, no server to run.

Free plan · Website builders