No moat. Still in business.

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A shared POSIX file system for Linux and Mac servers that stores its data in S3 or other object storage, with no storage cluster to run.

Since 2015

Subscription · Developer tools · Developers

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A hosted API for product teams to send app notifications over email, SMS, push, chat and an in app inbox.

Since 2020

Free plan · Transactional email · Developers

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Monitors servers, containers and cloud services from one agent, with dashboards, alerts and logs for teams without ops staff.

Free trial · Uptime and monitoring · Online sellers

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Sends automated email, SMS, push and WhatsApp messages using user segments and a visual journey builder, and can be embedded in your app.

Subscription · Email marketing · Health and clinics

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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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Runs and manages databases on Kubernetes, covering provisioning, scaling, backups and upgrades for platform teams.

Developer tools · Developers

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Lets software teams ship, scale and monitor services in a cloud account they own on AWS, Azure or GCP, without writing Terraform.

Since 2024

Free plan · Developer tools · 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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Lets developers and coding agents run local code against a real Kubernetes staging cluster, plus CI runs and PR previews.

Since 2022

Free plan · Developer tools · 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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Gives AI coding agents and developers isolated full-stack environments on your own Kubernetes setup to test code against real services.

Since 2025

Free plan · Developer tools · Developers

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Builds a managed Kubernetes setup inside a cloud account you own, where dev teams run apps, databases, monitoring and agents.

Since 2025

Developer tools · Developers

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Gives each AI agent a real email address, and soon a phone number, so it can read mail, reply and use login codes.

Since 2026

Free plan · Developer tools · Developers

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Runs and scales Apache Spark clusters on Kubernetes inside your own AWS account without marking up compute, for data teams.

Since 2026

Free plan · Developer tools · Developers

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Gives each customer of a SaaS product their own app, database, subdomain and SSL, set up from a dashboard or API.

Free plan · Developer tools · Developers

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Self-hosted on-call paging that pulls commits, logs and metrics when an alert fires and explains the likely cause.

Free · Uptime and monitoring · Developers

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A desktop and web app that finds resources across AWS, GCP, Azure and other clouds and lets infra teams work on them in one place.

Since 2026

Free plan · Uptime and monitoring · Developers

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Deploy and manage apps on your own Kubernetes cluster with a Heroku style workflow, hosted or self-hosted.

Since 2025

Free plan · Developer tools · Developers

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Deploys apps from a GitHub repo onto a server in your own cloud account, with HTTPS and redeploys on each push.

Since 2026

Free plan · Developer tools · Developers

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Desktop app for watching and controlling Kubernetes clusters and Flux or Argo CD deployments in one window.

Since 2026

Free plan · Developer tools · Developers

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A self-hosted developer portal that finds services in your GitHub repos and Kubernetes clusters and shows who owns them.

Since 2026

Free · Developer tools · Developers

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Lets SaaS teams message users by email, push or SMS when they take certain actions inside the product.

Since 2021

Subscription · Email marketing · Software companies

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Sets up and manages your own cloud server to deploy Django apps, with a dashboard, CLI and API.

Since 2021

Free plan · Developer tools · Developers