Find the free tierthat fits your stack.

Have I Been Pwned

Have I Been Pwned is a breach notification service that lets users check whether an email address appears in known data breaches. It also provides domain monitoring, password breach checks, and an API for programmatic email searches.

PageGym

PageGym is a website speed analysis and optimization tool. It measures page load speed, TTFB, render-blocking resources, and layout shift issues, then lets users compare results against earlier tests.

UseWebhook.com

UseWebhook.com is a browser-based webhook inbox that provides a unique URL for receiving test requests without running a server. Incoming requests can be inspected in the inbox, diffed, forwarded to localhost through the UseWebhook CLI, or replayed from request history.

RoboHash

RoboHash is a web service that generates unique robot, alien, monster, cat, human, and gorilla images from arbitrary text inputs such as usernames, email addresses, IP addresses, filenames, or other i...

UXtweak

UXtweak is a UX research platform that supports moderated and unmoderated studies, participant recruitment, analysis, and reporting in one web application. It includes tools for card sorting, tree tes...

LangWatch

LangWatch is an LLM engineering platform for testing, evaluating, observing, and governing AI agents. It combines simulation-based agent testing, offline and online evaluations, production tracing, prompt management, and governance controls in a single product.

LocalOps

LocalOps is an internal developer platform that provisions, deploys, monitors, scales, and secures services on a customer’s AWS, GCP, or Azure account from a single control plane. It connects to GitHu...

Wolfram Language

Wolfram Language is a symbolic programming language with built-in knowledge, data, and algorithms for technical computing. It represents data, formulas, code, graphics, documents, and interfaces as sy...

Hound is an automated code review tool for GitHub pull requests. It comments on code quality and style issues when a pull request is opened or updated, so teams can review changes against configured style guides and linters.