Email API for developers sending transactional and marketing email, with inbound email, CLI and SDKs
Resend (resend.com): Email API for developers sending transactional and marketing email, with inbound email, CLI and SDKs. Category on TopCheckouts: Developer tools.
In September 2026, Similarweb estimates about 10,076 visits went from Resend to a checkout payment page — #324 of the 607 sites we track. That is 1249% up from the April–June monthly average of 747.
Total website visits that month were about 2,175,419 (Similarweb 3-month total, split by month-over-month change). Roughly 0.5 of every 100 visits reached the checkout page.
Largest September traffic sources: direct 67%, search 25%, referrals/email/paid 5%. (Top channel measured; others estimated by rank.)
New users mostly come from the product spreading itself: the site shows open source, and direct plus brand search is about 92%, plus shares via WhatsApp. Most new users are brought in by existing ones.
Pricing: $0/mo (Free, 3,000 emails); $20/mo (Pro 50k); $35/mo (Pro 100k); $90/mo (Scal.
| Checkout | Apr–Jun avg | Jul | Aug | Sep |
|---|---|---|---|---|
| invoice.stripe.com | 0 | 318 | 10,257 | 9,473 |
| buy.stripe.com | 568 | 0 | 0 | 603 |
| pay.stripe.com | 178 | 0 | 1,636 | 0 |
| polar.sh | 0 | 0 | 0 | 0 |
| whop.com | 0 | 0 | 0 | 0 |
Similarweb referral data; months derived from 1/2/3/6-month shares.
Similarweb top channel measured, others estimated by rank
Direct + brand search 91.8% · Direct and brand search count as viral only when the site shows sharing mechanics; the largest share wins, under 5% means Other.
“Links to GitHub repos: 'Self-hosted MCP Server' (github.com/resend/resend-mcp) and CLI 'Repository'; no open-source license claim for core product”Quote from the site
In September 2026, Similarweb estimates about 10,076 visits went from Resend to a checkout payment page — #324 of the 607 sites we track. That is 1249% up from the April–June monthly average of 747.
New users mostly come from the product spreading itself: the site shows open source, and direct plus brand search is about 92%, plus shares via WhatsApp. Most new users are brought in by existing ones.
Pricing: $0/mo (Free, 3,000 emails); $20/mo (Pro 50k); $35/mo (Pro 100k); $90/mo (Scal.
Checkout visits are Similarweb's estimate of visits from this site to a checkout payment page; opening checkout is not paying, so this is not revenue. See the methodology for how website visits and source mix are computed. Updated 2026-10-21.