Cost / License
- Free
- Open Source (BSD-3-Clause)
Platforms
- Windows
- Mac
- Linux

Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)

Eureka Security’s mission is to help companies successfully protect cloud data, no matter where it resides or how rapidly it changes - reducing manual overhead and allowing development agility.
Cost / License
- Paid
- Proprietary
Platforms
- Software as a Service (SaaS)

ctlogs.dev is a free Certificate Transparency search engine and JSON API. It continuously ingests every public CT log on the Google and Apple log lists — including the sharded and static (tiled) logs — and indexes billions of TLS certificates into one searchable database.
Cost / License
- Free Personal
- Proprietary
Platforms
- Online
France
EU



Slingshot is a web-based HTTP request client that is highly performant, low on resources, privacy respecting, local-first, free and open-source. It stores all your data locally in your browser. It allows you to import and export OpenAPI specs and Postman collections.
Cost / License
- Freemium
- Open Source (AGPL-3.0)
Platforms
- Online
- Self-Hosted
Sweden
EU

HTTP API testing tool where you can create requests and mock existing API:s. After trial has expired you can still create requests.
Cost / License
- Freemium
- Proprietary
Application type
Platforms
- Windows


+1
Proxygen is the best HTTP proxy tool for testing apps and debugging remote API endpoints right on your iPhone, iPad and Mac. And it’s built to delight you while doing it.
Cost / License
- Paid
- Proprietary
Platforms
- Mac
- iPhone
- iPad
Finland
EU



Semonto is an uptime monitoring app that allows you to keep an eye on your websites, servers and apps 24/7. Get notified when something goes wrong so that you can fix it before anyone notices.
Cost / License
- Paid
- Proprietary
Application typeApplication types
Platforms
- Online
- Android
- iPhone
- iPad
- Software as a Service (SaaS)
Belgium
EU


+3
view request and response header of a HTTP connection, HTTP status codes and HTML source
Cost / License
- Free
- Proprietary
Application type
Platforms
- Online

SSLTutor is a learning platform that offers reading resources, blogs, and articles on SSL Certificate along with SSL Installation, SSL Browser Errors, Different SSL Tools, SSL Types, and some of the best SSL Certificate in the industry.
Cost / License
- Free
- Proprietary
Application type
Platforms
- Online

As the project name CryptoLyzer implies, it is a cryptographic protocol analyzer. The main purpose of creating this
Cost / License
- Free
- Proprietary
Platforms
- Mac
- Windows
- Linux
Cost / License
- Free
- Proprietary
Platforms
- Software as a Service (SaaS)
OpsBlip is operational asset lifecycle management for DevOps, IT, and agencies: expirations, notice windows, ownership, and public-surface drift — not just uptime.
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Global



Ain is a command-line HTTP API client. It's an alternative to postman, paw or insomnia. It enables scripting of input and further processing of output. It targets command-line users who work with API:s using a simple file format.
Cost / License
- Free
- Open Source (MIT)
Platforms
- Mac
- Windows
- Linux
- Raspberry Pi
Sweden
EU



Cost / License
- Free
- Proprietary
Application type
Platforms
- Android



Cost / License
- Free
- Open Source (GPL-2.0)
Application type
Platforms
- Linux
Packet Capture Pro is a professional network analyzer, packet sniffer, HTTP debugging proxy, and API testing tool for Windows, macOS, Android, and iOS. Built for developers, QA engineers, API testers, and network professionals, it helps you capture, inspect, intercept, rewrite...
Cost / License
- Freemium
- Proprietary
Platforms
- Mac
- Windows
- Android
- iPhone
- iPad
- Android Tablet
Singapore


+1
Actalis is a European certification authority that provides SSL/TLS certificates for websites and online services. It offers Domain Validation (DV), Organization Validation (OV) and Extended Validation (EV) certificates, plus ACME support for automated DV certificate issuance...
Cost / License
- Freemium
- Proprietary
Application type
Platforms
- Online



Cost / License
- Free
- Open Source
Platforms
- Mac
- Linux
- BSD
Zorp GPL is a next generation, open source proxy firewall with deep protocol analysis. It allows you to inspect, control, and modify traffic on the application layer of the ISO/OSI model. Decisions can be made based on data extracted from the application-level traffic (for...


















































