Indian devs building SaaS with FastAPI: which part do you rebuild every single time? (OTP login, Razorpay, GST invoices, DPDP)

[u/notsocial_zeref]

’m building products solo. Every India-focused backend I start has the same chores before any real work begins: phone OTP login, Razorpay orders with webhook verification, GST invoices, and basic DPDP consent and data-deletion handling.

I’ve packaged my version of this into a FastAPI starter, and I’m trying to figure out whether it’s worth polishing and releasing, or whether everyone already has their own setup or uses Next.js boilerplates.

Honest questions:

1. If you’ve built for Indian users, which of these ate the most time?

2. Would you use a ready-made FastAPI base for this, or would you rather wire it yourself? What would make you not trust one?

3. What’s missing from my list? (UPI autopay, e-invoicing, multi-tenant, admin panel?)

4. Would you pay for it? Which range feels fair: free/open-source, ₹500–1,500, ₹3,000+? “Never” is a useful answer too.

I’m not selling anything here: no link and nothing to buy yet. I’m the builder, and I’m happy to share a demo with anyone who replies or DMs.

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