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HomeBox
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Digital home record for renovations, maintenance, receipts, warranties and documents.

The modern platform for creating, sharing, and collaborating on AI prompts. Advanced version control and real-time testing.

Website, pricing, platforms and company facts side by side.
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| Website | my-homebook.com | diffyn.com |
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| Company | Startup from Finland · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


HomeBook is a digital home record for homeowners and renovators. Keep your home's renovations, maintenance, purchases, receipts, warranties, documents, photos, costs and dates organized in one place. HomeBook helps you build a complete history of your home over time, so important information is...
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What each product offers, as listed by its team.


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As answered by people managing HomeBook and Diffyn.
HomeBook's answer
HomeBook is a digital home record designed specifically around the home itself. It brings renovations, maintenance, purchases, receipts, warranties, documents, photos, costs and dates together in one place. Unlike general file storage or note-taking apps, HomeBook is structured around the history of a home. It is also local-first, meaning your home data stays on your own device rather than being stored on HomeBook's servers. HomeBook is a lifetime product with no recurring subscription.
Diffyn's answer:
Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.
HomeBook's answer
HomeBook combines home documentation and home history in one dedicated product. Instead of keeping information across Google Drive, email, phone photos, spreadsheets and paper folders, users can organize it around their actual home. It is designed to be useful both today, when finding a receipt or warranty, and years later, when looking back at renovations, maintenance and purchases. When the home is sold, its history can also be exported as a PDF or transferred to the next owner if they use HomeBook.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
HomeBook's answer
HomeBook is a local-first web application designed to run in a browser and as an installable PWA. The application is built with modern web technologies, with the focus on keeping the user's home data, photos and receipts stored locally on their own device rather than on HomeBook's servers.
Diffyn's answer:
React, Next.js, POSTGRESQL
HomeBook's answer
HomeBook is primarily designed for homeowners and people who are building or renovating a home. It is especially useful for people who want to keep track of renovations, maintenance, purchases, receipts, warranties, documents, photos, costs and other important information about their property over time.
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
HomeBook's answer
HomeBook was created from a simple problem: important information about a home is usually scattered across phone photos, emails, folders, spreadsheets and paper documents. The idea was to create a dedicated digital home record where that information could stay organized around the home itself. What started as a solution to make home information easier to manage became a product designed to preserve the complete history of a home for years and eventually make that history easier to pass on to the next owner.
Diffyn's answer:
I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.
HomeBook's answer
HomeBook is currently an early-stage product and does not yet have major enterprise or publicly recognized customers. It is designed primarily for individual homeowners, renovators and people building or maintaining their own homes.
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