GSTBillMaker.in
Vyapar
myBillBook.in
Bill To You
Tally.ERP 9
InvoiceBill.org
MARG
Faster than Tally. Simpler than Vyapar. GST invoices + filing JSON + payment tracking, in your browser. Available by invitation.

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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21bill
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| Website | 21bill.com | diffyn.com |
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The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
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As answered by people managing 21bill and Diffyn.
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.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
Diffyn's answer:
React, Next.js, POSTGRESQL
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
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.
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When comparing 21bill and Diffyn, you can also consider the following products.

Free online GST invoice software for Indian small businesses. Create Tax Invoice, Bill of Supply, Export invoice and Credit/Debit Notes in seconds. No signup. Direct PDF download. Track parties, file GSTR-1, multi-currency.
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Vyapar is a free GST billing and accounting platform that handles the invoicing queries with the help of an inventory management system.
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No.1 Billing Software for Small Businesses in India, Free Download. 60 Lakh+ Businesses Created GST Bills & Invoices with myBillBook Billing Software and increased Business. GST Billing Software for Bharat.
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Bill To You is the best billing software with GST enabled features for Small and mid sized...
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Free GST Invoice Generator for Indian Businesses — No Signup, No Limits
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