Best payments for AI apps and indie SaaS (2026): Stripe vs Polar vs Lemon Squeezy

⚡ Quick verdict

Stripe is our top pick for full control over billing, at 2.9% + 30¢ per US domestic card payment with no monthly fee. Polar is the pick for indie devs and AI apps that want a merchant of record handling tax and usage billing (free Starter at 5% + 50¢, Pro $20/mo at 3.8% + 40¢). Lemon Squeezy fits selling digital products with one flat 5% + 50¢ fee and no monthly charge.

📊 Comparison

Tool	Starting price	Free tier	Best for	Strengths	Weaknesses
Stripe	2.9% + 30¢ per card payment (US, no monthly fee) checked 2026-10-15 · source	No	Full control over billing	Payments, billing and subscriptions with no setup or monthly fees Optional Managed Payments adds a merchant-of-record service (3.5% on top of payment fees)	Not a merchant of record by default; you handle sales tax unless you add Stripe Tax or Managed Payments International cards and currency conversion add extra fees
Polar	$20/mo (Pro, 3.8% + 40¢) checked 2026-10-29 · source	Yes	Indie devs & AI apps	Merchant of record built for developers: subscriptions, usage billing and tax handled Free Starter plan; Pro ($20/mo) lowers fees to 3.8% + 40¢	Free Starter fee is 5% + 50¢ per transaction Paid plans needed for lower rates
Lemon Squeezy	$0/mo + 5% + 50¢ per transaction checked 2026-10-29 · source	Yes	Selling digital products	Merchant of record for software and digital products, with sales tax and VAT handled No monthly fee; one flat 5% + 50¢ transaction fee	5% + 50¢ is higher per sale than raw Stripe card fees

Prices are starting paid prices from each tool's official pricing page on the date shown. Pricing changes often; check the source before you buy.

🧭 Which should you pick?

Want the lowest raw card fees and full control: Stripe.
AI app with subscriptions or usage-based billing, and you do not want to deal with sales tax: Polar.
Selling a digital product, template or ebook: Lemon Squeezy.
Already on Stripe but want a merchant of record: Stripe Managed Payments (3.5% on top of payment fees).

❓ FAQ

What is the cheapest way to accept payments for an AI app?

Stripe has the lowest per-sale card fee here (2.9% + 30¢ for US domestic cards, no monthly fee), but you handle sales tax yourself. Merchants of record cost more per sale: Polar Starter and Lemon Squeezy are 5% + 50¢, and Polar Pro is 3.8% + 40¢ for $20/mo. Prices from official pricing pages, dated in the table.

What is a merchant of record?

A merchant of record sells to your customer on your behalf and takes on collecting and paying sales tax and VAT. Polar and Lemon Squeezy work this way; Stripe offers it through Managed Payments.

Do I need a monthly plan?

No. Stripe and Lemon Squeezy have no monthly fee, and Polar has a free Starter plan. You only pay per transaction.

🧱 Starter stacks

Ship an app this weekend · The indie dev stack · Launch an AI agent product

📚 More guides

Lovable vs Bolt.new · Cursor vs Claude Code · Supabase vs Firebase · Vercel vs Netlify · Best AI app builders · Best AI coding agents · Best backend for vibe coders · Best AI agent frameworks · Best app hosting for vibe coders · Best AI voice and text-to-speech · Railway vs Render · ElevenLabs vs Cartesia · Railway vs Fly.io · Lovable vs v0 · Cursor alternatives

← Browse all 69 tools on ToolStack · How we rank

Best payments for AI apps