+Auth, email, monitoring & payments
Clerk, Resend, Sentry, PostHog, Stripe — app add-on SaaS compared by cost at each usage level. — 14 entries
Clerk
Authentication and user management; Hobby includes 50,000 monthly retained users per app for free.
Auth0
Identity platform; B2C Free covers up to 25,000 monthly active users.
Resend
Transactional email API with 3,000 messages per month and 100 per day free.
Postmark
Transactional email delivery: 100 messages free, or Basic at $15 for 10,000 per month.
Sentry
Error and performance monitoring; Developer includes 5,000 errors monthly for one user.
PostHog
Product analytics and replay tools with 1 million analytics events per month free.
Algolia
Hosted search API; Free includes 10,000 monthly search requests and 50,000 records.
Cloudinary
Media upload and transformation service with 25 credits on Free.
Stripe
Online payment processing; US domestic card Standard has no monthly base and costs 2.9% + $0.30 per success.
Lemon Squeezy
Merchant of Record for digital products: $0 monthly base and 5% + $0.50 per transaction.
Paddle
Merchant of Record checkout for SaaS: no monthly base, 5% + $0.50 per transaction.
Authentication user pricing comparison인증 사용자 수 비용 비교
Move monthly users to compare Clerk and Auth0 only where their public prices allow.
Transactional email pricing comparison트랜잭션 메일 비용 비교
Change monthly sends to compare the cheapest published Resend tier with Postmark Basic.
Payment transaction fee comparison결제 거래 수수료 비교
Vary order value and count to calculate basic fees for US-card transactions.