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Launching April 2, 2030
stack127

stack127

A toolbox and reference hub for indie hackers

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  • Ravi Teja KNTS[maker]· 18d ago

    I built stack127 while working on my own projects. I kept needing practical tools and clear references for the same questions: SaaS metrics, Amazon KDP royalties, domain records, storage, and platform fees. stack127 brings those tools and resources together so other indie hackers, solo developers, and digital creators can use them too. Most of the tools are open source through stack127labs on GitHub.

stack127 is a toolbox and reference hub for indie hackers, solo developers, and digital creators who build and run projects online. Use its free tools to calculate SaaS metrics such as MRR and churn, estimate Amazon KDP royalties, check domains and DNS, and plan hosting and storage. Its directories help you compare platform fees, discover CLI apps and self-hosted software, and find places to launch a product. Reference pages explain facts such as domain status codes and software licenses. Built by Ravi Teja KNTS, stack127 turns repeated questions and practical project work into tools and resources other builders can use. Most of its tools are open source through stack127labs on GitHub.

stack127 is a free toolbox and reference hub offering calculators, domain, DNS, hosting, and SaaS tools for indie hackers.

for
Indie hackers, solo developers, and digital creators building online projects.
pricing
free

Key features

8 features of stack127
  • SaaS calculators — Compute MRR, churn, margin and acquisition cost from your monthly figures.
  • Domain & DNS tools — Lookup WHOIS data, check domain availability and read DNS resolver responses.
  • KDP royalty estimator — Set up Amazon KDP books and calculate royalties, cover sizes and payment dates.
  • Hosting & cloud planners — Plan self-hosted resources, inspect network details and verify server rules.
  • Storage capacity calculator — Estimate array capacity based on drives, topology and implementation factors.
  • Platform fee directory — Compare selling fees, start costs and payment charges across app stores and creator platforms.
  • Keyboard shortcut reference — Browse task-based shortcuts for popular apps, editors, browsers and OSes.
  • Open-source labs — Access open tools, datasets and self-hostable projects on GitHub via stack127labs.

Use cases

  • Calculate monthly SaaS revenue and churn for a subscription business.
  • Check domain registration details and DNS records before launch.
  • Estimate royalties for an Amazon KDP book before publishing.
  • Plan hardware storage capacity for a self-hosted server.
  • Compare platform fees when choosing a marketplace for a digital product.

stack127 FAQ

Are the tools on stack127 free to use?+

Yes, all tools are provided for free and most are open source on GitHub.

Can I use stack127 for commercial SaaS projects?+

Yes, the SaaS calculators can be used to analyze revenue and churn for any commercial SaaS.

Where are the open-source tools hosted?+

They are available through the stack127labs repository on GitHub.

Does stack127 offer any paid plans or premium features?+

No paid plans are listed; the service is offered as a free toolbox.

What kind of reference information does stack127 provide?+

It includes domain status code explanations, software license summaries, and keyboard shortcut guides.

Summarized by DevHunt from stack127.com · Oct 6, 2026. Details may change; check the official site.

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