Find the free tier that fits your stack.

Fivenines

Fivenines is a SaaS infrastructure monitoring platform for Linux and Windows servers, network devices, uptime checks, cron jobs, and workflow-based alert routing. It uses an open-source agent for server telemetry and supports HTTPS, TCP, ICMP, DNS, SNMP, a public REST API, and a Terraform provider.

CircleCI

CircleCI is a cloud CI/CD platform for running automated builds, tests, and deployments from source control events. It supports GitHub, GitLab, and Bitbucket integrations, plus execution environments for Docker, Linux VM, Arm VM, Windows VM, macOS VM, self-hosted runners, and GPU workloads.

GlitchTip is an open source error tracking service for applications and websites. It collects exceptions, log messages, Content Security Policy violations, performance transactions, uptime checks, and...

Localazy

Localazy is a software localization platform that manages source strings, translations, and delivery across apps, websites, CMS tools, and design files. It supports CLI, API, mobile SDKs, webhooks, tr...

Shake

Shake is a bug and crash reporting platform for mobile apps and websites. It provides SDKs for iOS, Android, React Native, Flutter, and web, and automatically attaches data such as device model, HTTP ...

Verifalia

Verifalia is an email verification API that checks addresses in real time and in batch through an HTTPS REST API that uses JSON. It supports integration into web forms, apps, CRMs, POS systems, and other data-entry points, and it provides SDKs for .NET, Java, JavaScript, Ruby, PHP, and Go.

Hexclave

Hexclave is an open-source platform for user authentication, payments, and product signals. It provides hosted and self-hosted options, with documentation, SDKs, and dashboard access for integrating identity, messaging, analytics, and related product infrastructure.

Bugsink is a self-hosted error tracking service for capturing application exceptions, stack traces, code context, and local variables. It supports a Docker-based installation flow and can also be used as a hosted service with the same SDK workflow.

AppVeyor

AppVeyor is a hosted CI/CD service for Windows, Linux, and macOS. It runs builds, tests, and deployments from GitHub, GitHub Enterprise, Bitbucket, GitLab, Azure Repos, Kiln, Gitea, or custom repositories, using versioned YAML configuration or the web UI.