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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Watches web pages for changes and sends alerts or scraped data to Slack, Discord, Telegram or Google Sheets without code.

Since 2019

Free plan · Uptime and monitoring

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Sets up and manages your web servers and handles site deployments, with extra help for Laravel apps.

Subscription · Developer tools · Agencies

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WordPress plugin that sends site email through a proper SMTP provider and logs each message so you can see if it arrived.

Free · Transactional email

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Send JSON events from your app with one request, then chart, query with SQL, set alerts and embed dashboards.

Since 2022

Free plan · Website analytics · Developers

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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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Falco based Kubernetes security tool that spots attacks inside your own cluster, sends no telemetry and is paid for once.

Since 2026

One-off payment · Security and passwords · Developers

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Gives your OpenClaw AI agent a phone line so it can call you with alerts and briefings when your rules trigger.

Since 2026

Subscription · Automation and integrations · Individuals and families

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Watches competitors' sites, emails, ads, news and SEO and alerts early B2B SaaS founders to changes that matter.

Since 2025

Subscription · Marketing and social · Software companies

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Runs browser and API checks against your app from many regions and alerts you when they fail, set up as code.

Since 2021

Free plan · Uptime and monitoring · Developers

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Sends alerts to on-call staff, handles their rotas and runs status pages so tech teams can respond to outages quickly.

Since 2020

Free trial · Uptime and monitoring · Developers

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Watches your sites, certificates, DNS records and scheduled tasks around the clock and tells your team as soon as something fails.

Since 2024Updated 4 months ago

Subscription · Uptime and monitoring · Developers

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Monitors websites, servers, cron jobs, DNS records and SSL certificates, with alerts and public status pages.

Since 2024

Free plan · Uptime and monitoring · Developers

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Hosted status pages with built-in uptime checks, so you can keep customers informed during outages and cut support tickets.

Free plan · Uptime and monitoring · Software companies

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Tracks domain renewals, SSL certificates and DNS records for many sites and alerts you before something lapses or breaks.

Since 2024

Subscription · Uptime and monitoring · Agencies

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Hosted RabbitMQ and LavinMQ message queues that are monitored and maintained for you on the major clouds.

Developer tools · Developers

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Monitors website uptime from several countries, tries automatic recovery, and calls or texts you if the problem stays.

Subscription · Uptime and monitoring

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Gathers status updates from thousands of cloud services you depend on, warns you about outages and shows them on one page.

Uptime and monitoring · Software companies

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Sends messages from your scripts, servers or webhooks straight to the Pocket Alert app on your iPhone or Android phone.

Since 2024

Free plan · Uptime and monitoring · Developers

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Checks your websites, SSL certificates, DNS and domains every 30 seconds and alerts you when something breaks or expires.

Free plan · Uptime and monitoring · Agencies

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A free status page you host yourself to tell customers about outages, incidents and planned maintenance.

Free · Uptime and monitoring · Software companies

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Alerts you when a cron job misses its ping or a site, certificate or domain has a problem, with status pages included.

Free plan · Uptime and monitoring · Agencies

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Tracks machine learning experiments, metrics and model versions for ML teams, with an API compatible with Weights and Biases.

Free trial · Developer tools · Developers

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Watches the status pages of thousands of outside services and alerts you when the ones you depend on go down.

Since 2024

Free plan · Uptime and monitoring · Developers

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Checks your websites, SSL, ports and cron jobs, confirms outages from other regions and runs status pages on your domain.

Since 2024

Free plan · Uptime and monitoring · Online sellers

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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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Checks websites, APIs and cron jobs every 30 seconds and confirms an outage before alerting your team.

Subscription · Uptime and monitoring · Developers

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Monitors websites and Linux servers, sends alerts by email, SMS or call, and hosts branded status pages on your domain.

Free plan · Uptime and monitoring · Developers

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Tells developers when scheduled jobs, agents, websites or APIs fail or run late, and hosts status pages for customers.

Free plan · Uptime and monitoring · Developers

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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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Watches AI agents in production, groups recurring failures and alerts you so a coding agent can fix them.

Free plan · Uptime and monitoring · Developers

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Records each step of an AI agent's run so developers can spot slow calls, errors and token costs.

Since 2026

Free plan · Uptime and monitoring · Developers

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Checks your websites, APIs and ports and messages you on WhatsApp after repeated failures, with status pages and SSL checks.

Free plan · Uptime and monitoring · Developers

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Lets developers record counters and revenue figures in their own database, then chart them and set alerts in a hosted dashboard.

Since 2026

Subscription · Developer tools · Developers

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Runs incidents from alert to postmortem for engineering teams, with on-call rotas, escalations and status pages included.

Free plan · Uptime and monitoring · Developers

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Watches MySQL, PHP-FPM, Varnish and NGINX servers in one dashboard with alerts, as a swap in replacement for NGINX Amplify.

Since 2026

Free plan · Uptime and monitoring · Developers

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Open source uptime checks, alerts and public status pages that you or an AI agent can manage, with no charge per monitor.

Free plan · Uptime and monitoring · Developers

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Uptime checks for sites, APIs, databases and queues you run on your own server, with alerts and public status pages.

Free · Uptime and monitoring · Developers

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Alerts you by email, Slack or a ticket when a cron job, backup or pipeline misses its expected check-in.

Since 2026

Free plan · Uptime and monitoring · 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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Open-source monitoring you host yourself for websites, servers, containers and SSL, with status pages and alerts.

Free · Uptime and monitoring · Developers

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A free status page and uptime monitor you run in Docker, with incident updates, maintenance plans and subscriber notices.

Free · Uptime and monitoring · Developers

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Checks websites and APIs from several regions, alerts whoever is on call and runs a public status page.

Free plan · Uptime and monitoring · Agencies

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Tracks API traffic, errors and response times, logs requests and sends alerts, set up with a few lines of code.

Since 2025

Free trial · Uptime and monitoring · Developers

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Spots DDoS attacks on your servers within a second and triggers firewall, BGP or scrubbing responses.

Since 2026

Subscription · Uptime and monitoring · Developers

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Watches websites and APIs, alerts you on several channels, tracks incidents and hosts status pages, all from an independent EU company.

Since 2025

Free plan · Uptime and monitoring · Agencies

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Alerts you when AI agent runs, cron jobs or CI pipelines fail, stall or never start, with status pages.

Free plan · Uptime and monitoring · Developers

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Catches missed cron runs, stalled background jobs and site downtime through heartbeat pings, with public status pages.

Free plan · Uptime and monitoring · Developers