SaaS pricing, decoded

Know exactly what your software stack costs.

Tiered, usage-based pricing is built to be hard to compare. StackPricing re-prices every tool at your numbers and ranks them cheapest first — so the real monthly cost stops hiding behind a slider.

Newsletter calculator Email API calculator

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Newsletter & email tools Priced per subscriber. Kit, beehiiv, MailerLite, ActiveCampaign, Mailchimp and more. 11 tools → Transactional email / SMTP APIs Priced per email sent. Amazon SES, SendGrid, Postmark, Resend, Mailgun and more. 7 tools →

Data study The State of Email Pricing in 2026 A 11-tool price analysis: the spread, the shrinking free tiers, and how the cheapest tool flips as you scale. →

Best email tool for…

By use case

Cheapest email marketing tool Best free email tool Best email tool for beginners Best email tool for newsletters & creators Best email tool for small business Best email tool for large lists (50k+)Best email tool for automation

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Transactional email / SMTP APIs

7 tools

Amazon SES vs SendGrid Postmark vs Resend Mailgun vs SendGrid Brevo vs Mailjet

Cheapest tool for your list size

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1,000 subscribers 2,500 subscribers 5,000 subscribers 10,000 subscribers 25,000 subscribers 50,000 subscribers 100,000 subscribers