Simple, usage-based pricing

Pay per OTP sent. Start free for your first 3 months — no card needed.

Free for your first 3 months

₹20

in credits · ~57 OTPs

Every new account receives ₹20 in credits on the 1st of each month for its first 3 months. Credits are used before your cash balance and don't carry over — after month 3, you'll top up your balance instead.

No card required to get started.

Beyond free credits

₹0.35

per OTP sent

Charged when an OTP is dispatched. MiniMoth tries WhatsApp first, then SMS automatically — the charge is reversed if delivery fails on both channels, unless the number shows a recent pattern of repeated delivery failures.

Custom rates for high-volume accounts — contact us.

Top-up amounts

Top up your cash balance when credits run out. All amounts are prepaid.

₹50

~142 OTPs

₹100

~285 OTPs

₹300

~857 OTPs

₹500

~1,428 OTPs

₹1,000

~2,857 OTPs

₹2,000

~5,714 OTPs

How we compare

	Per OTP / SMS	Free tier
MiniMoth	₹0.35	₹20 × 3 months
Firebase Phone Auth	₹6.00	10 SMS / day
Clerk	₹9.00	None

Firebase: ~₹6/SMS for India after 10 free SMS/day. Clerk: ~₹9/SMS international. MiniMoth includes OTP generation, WhatsApp-first delivery with SMS fallback, rate limiting, session management, and DLT compliance.

Need higher volume? Get in touch for custom pricing.

Common questions

Who is MiniMoth for?: Indie developers, startups, and early-stage teams building apps for Indian users. It's a good fit for prototypes, MVPs, and projects where getting phone auth working quickly matters more than custom branding. Indian users expect OTP — via WhatsApp or SMS — it's the auth flow they already trust.
Can I use my own DLT sender ID?: No. MiniMoth sends all OTPs from its own TRAI DLT-registered sender for SMS. WhatsApp delivery doesn't require DLT registration at all — it goes via Meta's Cloud API. Either way, you skip carrier approvals and compliance paperwork entirely. The tradeoff: your users see MiniMoth's sender name on any SMS, not your brand. If a custom SMS sender ID is a hard requirement, you'll need a full DLT setup through a carrier.
When am I charged?: When POST /v1/otp/send is called and the OTP is dispatched — not on verify or session creation. MiniMoth tries WhatsApp first; if that fails, SMS is sent automatically. Either way, it counts as one dispatched OTP.
What if delivery fails?: MiniMoth tries WhatsApp first, then falls back to SMS. The charge is reversed automatically to your credits balance, with a refund entry in your transaction history, if delivery fails on both channels — unless the number shows a recent pattern of repeated delivery failures, which we treat as a signal to guard against abuse rather than refund automatically.
How long do free credits last?: Your first 3 months as a registered developer. Credits reset to ₹20 on the 1st of each of those months; from month 4 onward they're no longer refreshed, and OTPs are billed against your cash balance instead.
Do credits carry over?: No. Within your first 3 months, credits reset to ₹20 on the 1st of each month — unused credits expire rather than accumulating.
Are top-ups refundable?: Top-ups are prepaid and non-refundable. If you have a dispute, email info@minimoth.dev and we'll review it in good faith.

Get started free

₹20 in free credits for your first 3 months. No card needed.