No moat. Still in business.

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Runs automated tests against your APIs and websites after each deploy and on a schedule, with alerts on failure.

Since 2016

Uptime and monitoring · Developers

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Sends an email or Slack message whenever your brand or chosen keywords show up in Hacker News, Reddit or Lobsters posts.

Since 2017

Free plan · Marketing and social

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A service that finds and quarantines flaky tests, skips unneeded CI jobs and runs a merge queue for software teams on GitHub.

Since 2021

Developer tools · Developers

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Connects to your SaaS tools to handle staff access requests, reviews and removals, with an agent doing the routine work.

Since 2024

Security and passwords · Software companies

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Website analytics that shows which traffic sources bring paying customers, for founders and small online businesses.

Subscription · Website analytics · Online sellers

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An SMTP relay and email API for sending transactional and marketing mail from apps, with searchable delivery logs.

Free plan · Transactional email · Developers

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SEO agent for founders that reads your Search Console data, plans topic clusters and drafts articles straight into your CMS.

Since 2024

Free plan · SEO

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Billing software for hosting firms that sells domains, hosting and SSL, sets up services and sends the invoices.

Subscription · Invoicing and billing · Software companies

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Shows B2B sellers which companies visit their website and what interests them, so sales can follow up early.

Free trial · CRM and sales · Agencies

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Checks comments before they post and tells commenters how to fix rude or off-topic ones, for sites running discussions.

Communities and memberships · Creators and writers

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Lets online sellers accept 200+ local payment methods around the world through one account, API or shop plugin.

Pay as you go · Payments and checkout · Online sellers

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Run surveys in email, websites and apps, then group the answers into themes so product teams can act on customer feedback.

Free plan · Forms and surveys · Software companies

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Sends engineering teams a daily summary of AWS and Azure spending changes by Slack, Teams or email.

Since 2018

Subscription · 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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An API and plugin that flags throwaway email domains at signup so fake accounts never get in.

Free plan · Security and passwords · 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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Keeps pull request discussions in sync across GitHub, Slack and VS Code so dev teams and AI agents review code faster.

Free plan · Developer tools · Developers

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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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Posts a Slack alert when Apple or Google approves or rejects your app, or a TestFlight build is ready.

Since 2023

Subscription · Uptime and monitoring · Developers

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Logs errors from .NET and JavaScript apps, checks site uptime and scheduled jobs, and notifies your team in chat or email.

Free trial · Uptime and monitoring · Developers

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Pull request stats, DORA dashboards, daily summaries and custom alerts built from a team's GitHub activity.

Subscription · Developer tools · Developers

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Shows live sales, sign-ups, reviews and visitor counts as small notifications on your site to build buyer trust.

Subscription · Marketing and social · Online sellers

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AI agent that writes code inside VS Code, JetBrains, the terminal or browser, open source, with hundreds of models at no markup.

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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CAPTCHA and bot blocking that stops scrapers, fake signups and account takeover on forms, APIs and full sites, explaining each block.

Free plan · Security and passwords

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Watches your SSL certificates and sends alerts well before they expire, with automatic host discovery.

Since 2022

Free plan · Uptime and monitoring · Developers

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A snippet library for developers and teams to save, label and share code, with plugins for editors, browsers and Slack.

Developer tools · Developers

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Hosted service that receives, logs and retries webhooks, with a CLI for local testing and a typed SDK.

Since 2024

Developer tools · Developers

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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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APIs and a WordPress plugin that check IP location and reputation, emails and phone numbers to filter out fake form signups.

Free plan · Security and passwords · Developers

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One API and dashboard for sending product notifications by email, SMS, push, Slack and in-app inbox.

Since 2022

Subscription · Transactional email · Developers

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An online place to translate software strings with your team, AI or hired translators, connected through an API and plugins.

Developer tools · Developers

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Watches Linux and Windows servers and website uptime from many locations, finds running services itself and sends alerts.

Free plan · Uptime and monitoring · Developers

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Outbound SMTP relay for servers and sites that filters spam and malware and handles sender reputation, billed per email.

Subscription · Transactional email · Developers

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One API and an in-app inbox component that let software teams send notifications by email, SMS, push, chat and in-app.

Transactional email · Developers

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Records user sessions and catches front end errors in web and mobile apps so product and dev teams can fix bugs faster.

Since 2022

Free trial · Website analytics · Developers

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Blocks scrapers, spam bots and fake signups before they reach your site, by plugin, API or a DNS change.

Free plan · Security and passwords · Online sellers

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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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Sends app and site emails such as receipts and password resets through EU-only servers, with an API, SMTP and SDKs.

Free plan · Email marketing · Developers

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Leave comments and bug reports right on websites, mobile apps, PDFs and images, then route them to your task tools.

Design and images · Agencies

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Self-hosted scheduler that runs, chains and logs scripts, SQL and Ansible jobs across many servers for sysadmins and MSPs.

Free plan · Developer tools · 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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Hosted service that adds social network sign-in and single sign-on to websites and apps, with a REST API.

Free plan · Security and passwords · Developers

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Watches WordPress sites for vulnerable plugins and themes and blocks exploits with virtual patches until fixes land.

Free trial · Security and passwords · Agencies

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Gives each AI coding agent its own cloud Linux machine, started from Slack, Linear or an API and managed from any device.

Since 2026

Free plan · Developer tools · Developers