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CruxDev.tech VS sup

Compare CruxDev.tech VS sup and see what are their differences

CruxDev.tech

300+ free browser-based developer utilities and engineering courses with zero-server tracking and 100% client-side privacy.

Rating
0 reviews
Pricing
Free
Alternatives Is it good?
sup

The first creep-free way to see nearby friends

Rating
0 reviews
Pricing
Open source
Alternatives Is it good?
Taverlo
Check your business domain’s public DMARC and SPF records free. Ongoing monitoring is free for one domain; $29/month covers up to five. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, sup seems to be more popular. It has been mentioned 2 times since March 2021.

social mentions
0 vs 2
Web Browsers popularity
100% vs 0%
alternatives listed
15 vs 46

Base details

Website, pricing, platforms and company facts side by side.

CruxDev.tech
sup
Website cruxdev.tech sup-heliotrope.github.io
Pricing
Free
Open source
Company Startup from India · 1 - 9 employees —
Listed in
Devtools Web Development Tools Productivity SaaS API Programming Testing Web Browsers Security & Privacy Developer Tools Design Tools Text Editors +9
Android Podcasts Podcast Tools App +1

About CruxDev.tech and sup

In their own words, as submitted to SaaSHub.

CruxDev.tech
sup

CruxDev is an all-in-one developer toolbox and technical learning platform featuring over 300+ browser-based utilities and 70 engineering courses. Key Highlights: Zero-Server Privacy: 100% client-side execution. Your confidential code, JSON payloads, API tokens, JWTs, and keys never leave your...

Read more about CruxDev.tech

No description of sup yet.

Features and specs

What each product offers, as listed by its team.

CruxDev.tech 8 features
sup 4 features
  • Zero-Server Architecture
    All calculations, encodings, and data processing execute 100% locally in your browser. Confidential code, API tokens, and JSON payloads are never transmitted to any server.
  • 300+ Developer Utilities
    Comprehensive client-side toolset including JSON formatters, JWT decoders, regex testers, UUID generators, color palettes, and CSS studios.
  • AI Prompt & Token Cost Estimator
    Accurate token counters and real-time cost estimation across leading LLM architectures including GPT-5, Claude, Gemini, and DeepSeek.
  • Web Cryptography Suite
    Client-side cryptographic hash generation (SHA-256, MD5, Keccak), HMAC calculation, symmetric encryption, and key generation using standard Web APIs.
  • Code & Data Converters
    Instant format conversions between JSON, YAML, TOML, XML, CSV, TypeScript interfaces, and Docker Run commands to Docker Compose.
  • No Sign-up Required
    Full, unrestricted access to every utility and calculator without account creation, API keys, or subscriptions.
  • Offline PWA Capability
    Lightweight Progressive Web App that caches locally, allowing developers to use tools even without an active internet connection.
  • CruxDev Academy
    Curated technical curriculum featuring 70 engineering courses covering distributed systems, systems architecture, backend scaling, and full-stack development.
  • User-Friendly Interface
    The website features a clean and intuitive interface that is easy to navigate, making it accessible for users of all skill levels.
  • Comprehensive Documentation
    Sup Heliotrope provides extensive documentation which helps users to understand and utilize its features effectively.
  • Open Source
    As an open-source project, users can contribute to its development or modify the code to suit their own needs, fostering a collaborative community.
  • Regular Updates
    The developers frequently update the platform, ensuring it stays current with the latest features and security patches.

Possible disadvantages

  • Limited Support
    While the platform is open-source, direct support options may be limited compared to enterprise-level solutions.
  • Steep Learning Curve for Complex Features
    Some of the more advanced features might have a steeper learning curve that could be challenging for beginners to grasp.
  • Performance Issues
    Depending on user hardware and configurations, some users might experience performance issues with the platform.
  • Dependency on Community Contributions
    The progress of the platform can be somewhat dependent on community contributions, which can vary in consistency and quality.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
CruxDev.tech
sup
100% 100%
Web Browsers
0% 0%
0% 0%
Android
100% 100%
100% 100%
Programming
0% 0%
0% 0%
iPhone
100% 100%

Questions & Answers

As answered by people managing CruxDev.tech and sup.

What makes your product unique?

CruxDev.tech's answer

CruxDev combines over 300+ essential developer utilities with a comprehensive 70-course engineering academy in a single unified workbench. Crucially, it operates on a strict zero-server privacy architecture: all transformations, cryptography, formatting, and file processing happen 100% locally inside the user's browser using Web APIs and WebAssembly. Sensitive code snippets, JSON payloads, and API tokens never leave the device.

Why should a person choose your product over its competitors?

CruxDev.tech's answer

Most developer utility websites are fragmented, ad-heavy, or silently transmit sensitive payloads to remote backend servers. Desktop alternatives require heavy downloads and platform-specific installations. CruxDev delivers an instant, lightweight web and offline PWA experience across any operating system with zero sign-ups, guaranteed data isolation, and modern features like LLM token cost modeling that legacy toolkits lack.

How would you describe the primary audience of your product?

CruxDev.tech's answer

The primary audience consists of software engineers, full-stack developers, DevOps engineers, cloud architects, cybersecurity analysts, and technical students. It is especially suited for developers handling confidential payloads, API secrets, database schemas, and cryptographic keys who require reliable utilities that adhere to strict zero-trust privacy standards.

What's the story behind your product?

CruxDev.tech's answer

CruxDev was created out of the frustration of constantly juggling dozens of scattered single-purpose utility websites for daily programming tasks—formatting JSON on one site, decoding JWTs on another, generating hashes on a third—and worrying whether those servers were logging company data. It was engineered from the ground up as a fast, all-in-one developer companion where all processing remains strictly client-side.

Which are the primary technologies used for building your product?

CruxDev.tech's answer

React, TypeScript, Vite, Tailwind CSS, Web Cryptography API, WebAssembly (Wasm), Canvas APIs, and Cloudflare Pages edge hosting.

Who are some of the biggest customers of your product?

CruxDev.tech's answer

  • Independent Software Engineers & Consultants
  • Full-Stack Web Developers & DevOps Practitioners
  • Open Source Builders & AI Application Developers
  • Engineering Students & Technical Researchers

User comments

Share your experience with using CruxDev.tech and sup. For example, how are they different and which one is better?

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Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

CruxDev.tech 0 mentions
sup 2 mentions

Tracking CruxDev.tech since Sep 2026.

  • Show HN: Sup – one liners to distribute binaries
    Sup is also “a console-based email client for people with a lot of email”: https://sup-heliotrope.github.io/. - Source: Hacker News / over 3 years ago
  • People who use VIM/NVIM extensively, What's your typing speed, and do you touch type?
    A long time ago I used https://sup-heliotrope.github.io/ , which is sort of mutt with a gmail approach to email. Being a curses-based email client, it of course lets you shell out to vim for writing your email. Source: over 3 years ago

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