Best Auth & Payments for Builders
For payments the best choice in 2026 is Stripe, because it has no monthly fee and every AI app builder already integrates it; for auth, pick Clerk (or Supabase Auth if you're on Supabase).
The boring-but-critical pieces: signing users in and getting paid.
Last checked · 4 ranked · editorial verdict · how we rank
The verdict
Stripe. The default for payments: no monthly fee, 2.9% + 30¢ per domestic card charge, integrated by every AI builder.
- #1
Stripe
StripeWhy #1: The default for payments: no monthly fee, 2.9% + 30¢ per domestic card charge, integrated by every AI builder.
- Best for
- Charging money for anything
- Pricing
- No monthly fee on standard pricing: 2.9% + 30¢ per successful domestic card transaction (US). Other methods and add-ons vary.
- #2
Clerk
ClerkWhy #2: Fastest polished auth for React/Next.js with 50,000 free monthly retained users per app.
- Best for
- Next.js apps that need auth today
- Pricing
- Hobby free (50,000 monthly retained users per app). Pro $20/mo billed annually. Business $250/mo billed annually.
- #3
Supabase
Supabase · open sourceWhy #3: Auth bundled with your database: one less vendor.
- Best for
- Apps already on Supabase
- Pricing
- Free $0 (50,000 MAU, 500 MB DB, 2 active projects, pauses after 1 week inactivity). Pro from $25/mo. Team from $599/mo.
- #4
Firebase
GoogleWhy #4: Solid auth on a no-cost tier, strongest for mobile.
- Best for
- Mobile apps
- Pricing
- Spark plan: no-cost usage limits. Blaze: pay as you go (eligible new users can get $300 free credit).
FAQ
What is the #1 pick in Best Auth & Payments for Builders?
For payments the best choice in 2026 is Stripe, because it has no monthly fee and every AI app builder already integrates it; for auth, pick Clerk (or Supabase Auth if you're on Supabase).
Which tools made the Best Auth & Payments for Builders list?
#1 Stripe (best for: charging money for anything); #2 Clerk (best for: next.js apps that need auth today); #3 Supabase (best for: apps already on supabase); #4 Firebase (best for: mobile apps).
What's the cheapest way to start with Stripe?
No monthly fee on standard pricing: 2.9% + 30¢ per successful domestic card transaction (US). Other methods and add-ons vary. (Checked 2026-10-22.)
Should I build my own auth?
Almost never for an MVP. Use Clerk or Supabase Auth and spend the time on your product.