Dev tools · alternatives · 2026
24 alternatives to Postcat
A powerful open source, cross-platform API development tool.
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Postcat launched in 2024; newer entries below may have overtaken it.
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Apicat is the ultimate offline Postman alternative that stores your .http files locally. It’s Git-friendly, open-source, and highly compatible with Postman. Test APIs offline with this powerful free offline API client designed for developers who need a reliable local API testing tool.
Oct 2025 · apicat.com · its alternatives →
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2021 · github.com · its alternatives →
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Sparrow▲457The lightest and fastest platform for API testing
2025 · sparrowapp.dev · its alternatives →
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Public APIs▲645Find public APIs and start building projects and share them.
2019 · public-apis.io · its alternatives →
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Generate, edit, lint & test your API workflow in one place
Sep 2025 · app.getelva.ai · its alternatives →
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Effortlessly discover API behaviour with a Chrome extension that automatically generates OpenAPI specifications in real time for any app or website.
2023 · github.com · its alternatives →
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Hi HN! I just released version 1.0 of Posting, an open source terminal application I've been working on which you might find useful if you work with, test, or develop HTTP APIs! Posting (https://github.com/darrenburns/posting) is an HTTP client, not unlike Postman and Insomnia. However, as a TUI application, it works over SSH and enables efficient keyboard-centric workflows. Your requests are stored locally in simple readable YAML files, meaning they're easy to read and version control. Some other features include: - "Jump mode" navigation - Environments/variables…
2024 · github.com · its alternatives →
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Hi HN, we are building Tracecat (https://tracecat.com/), an open source automation platform for security alerts. Tracecat automates the tasks a security analyst has to do when responding to a security alert: e.g. contact victims, investigate security logs, report vulnerability. The average security analyst deals with 100 alerts per day. As soon as an alert comes in, you have to investigate and respond. An average alert takes ~30 minutes to analyze (and 100 x 30 min = 50 hours > one whole day) Lots of things get dropped, and this creates vulnerabilities. Many breaches can be…
2024 · github.com · its alternatives →
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2019 · postmake.io · its alternatives →
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A clean, developer-first way to manage and test your APIs.
Jan 2026 · reqbeam.dev · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →