FiatFlow

Fiat payments → instant crypto for your web3 app – no wallets needed.

Score: 8.1/10UKMedium BuildReady to Spawn
Brand Colors

The Opportunity

Problem

Solo web3 founders can't acquire or retain users due to high crypto wallet friction and non-crypto users refusing to onboard.

Solution

FiatFlow lets users pay with Stripe/credit card for web3 actions like subscriptions or mints, auto-converting to on-chain via ramps. Solo founders integrate via API or button, handling all KYC/compliance. Users stay fiat-native, boosting acquisition by 5x.

Target Audience

Solo founders building web3 or crypto-based projects

Differentiator

End-to-end fiat-to-tx flow with revenue sharing on conversions.

Brand Voice

professional

Features

Payment Button Embed

must-have10h

One-line script for fiat buy buttons.

Auto Crypto Ramp

must-have25h

Stripe → on-ramp → your wallet tx.

Subscription Handler

must-have15h

Recurring fiat to crypto drips.

Transaction Dashboard

must-have12h

Track fiat inflows and chain outs.

Compliance Logs

must-have10h

KYC/AML auto-reports.

Dynamic Pricing

nice-to-have8h

Fiat prices auto-adjust to crypto vol.

Webhook Integrations

nice-to-have6h

Notify your app on tx success.

Multi-Currency

nice-to-have12h

USD/EUR to any chain.

NFT Checkout

future20h

Direct mint payments.

Total Build Time: 118 hours

Database Schema

users

ColumnTypeNullable
iduuidNo
emailtextNo
stripe_idtextYes
created_attimestampNo

Relationships:

  • one-to-many with integrations

integrations

ColumnTypeNullable
iduuidNo
user_iduuidNo
target_wallettextNo
chain_idintNo
webhook_urltextYes

Relationships:

  • foreign key to users.id
  • one-to-many with transactions

transactions

ColumnTypeNullable
iduuidNo
integration_iduuidNo
fiat_amountintNo
crypto_amountintNo
statustextNo
tx_hashtextYes
created_attimestampNo

Relationships:

  • foreign key to integrations.id

API Endpoints

POST
/api/integrations

Create integration

🔒 Auth Required
POST
/api/transactions/create

Initiate fiat payment

GET
/api/dashboard/transactions

List transactions

🔒 Auth Required
POST
/api/webhooks/stripe

Handle Stripe events

GET
/api/ramp/:txId

Ramp status check

Tech Stack

Frontend
Next.js 14 + Tailwind + shadcn/ui
Backend
Next.js API + Supabase Functions
Database
Supabase Postgres
Auth
Supabase Auth
Payments
Stripe + Coinbase Ramp
Hosting
Vercel
Additional Tools
Viem ethersZapper API

Build Timeline

Week 1: Auth & payments setup

20h
  • User auth
  • Stripe connect

Week 2: DB & integrations

25h
  • Schemas
  • Integration CRUD

Week 3: Payment flow

30h
  • Fiat button
  • Ramp integration

Week 4: Dashboard & webhooks

20h
  • Tx dashboard
  • Webhooks

Week 5: Compliance & polish

15h
  • Logs
  • UI fixes

Week 6: Test & launch

10h
  • Tests
  • Deploy
Total Timeline: 6 weeks • 140 hours

Pricing Tiers

Free

$0/mo

Basic dashboard

  • $100/mo volume
  • 1 integration

Pro

$8/mo

1% rev share

  • Unlimited volume
  • Unlimited integrations
  • Webhooks

Enterprise

$49/mo
  • 0% rev share
  • Priority ramps
  • Custom compliance

Revenue Projections

MonthUsersConversionMRRARR
Month 1803%$19$228
Month 67006%$252$3,024

Unit Economics

$7
CAC
$288
LTV
4%
Churn
92%
Margin
LTV:CAC Ratio: 41.1xExcellent!

Landing Page Copy

Accept Fiat, Deliver Crypto Seamlessly

Stripe payments auto-ramped to your web3 app – acquire non-crypto users instantly.

Feature Highlights

Embed buttons
Auto-ramps
Subs handling
Tx dashboard
Compliance ready

Social Proof (Placeholders)

"'Fiat conv 10x better than wallets.' - NFT Founder"
"'Retention fixed overnight.' - DeFi Dev"

First Three Customers

Target NFT mint sites and DeFi protocols via Twitter searches for 'crypto payments pain'. Offer free Pro + migration help. Post MVP demo on r/Entrepreneur crypto threads.

Launch Channels

Product Huntr/cryptodevsHacker NewsTwitter #web3payments

SEO Keywords

fiat to crypto paymentsweb3 stripe integrationnon-custodial rampscrypto subscription billing

Competitive Analysis

Transaction fees
Strength

Ramps

Weakness

No SaaS embed for apps

Our Advantage

Developer-first dashboard + subs

🏰 Moat Strategy

Transaction data network effects for better ramps.

⏰ Why Now?

Stablecoin regs stabilizing, fiat on-ramps booming post-ETF.

Risks & Mitigation

financiallow severity

Ramp provider fees eat margins

Mitigation

Multi-provider fallback

legalhigh severity

Money tx regs

Mitigation

Partner licensed ramps

executionmedium severity

Ramp downtime

Mitigation

Queued processing

Validation Roadmap

pre-build5 days

Interview 5 founders

Success: 3 commit to beta

mvp21 days

Single chain ramp

Success: $1k volume

launch7 days

Beta user feedback

Success: 80% retention

growth30 days

Affiliate program

Success: 20% referral growth

Pivot Options

  • Pure fiat analytics
  • Web2 to web3 payment gateway

Quick Stats

Build Time
140h
Target MRR (6 mo)
$800
Market Size
$750.0M
Features
9
Database Tables
3
API Endpoints
5