The Resend alternative
with one simple bill

Choose Resend if you mostly send transactional email and want its larger free tier, or if your team builds emails with React Email. Choose Plunk if you also send to a large contact list, since Plunk never prices by contacts, or if you want open source and EU hosting.

Resend has separate plans: transactional email by monthly volume, and marketing email by the number of contacts you store. Plunk charges $0.001 for every email, whatever kind, with unlimited contacts and no monthly plan. Pricing checked against resend.com in October 2026.

No. Resend’s platform is closed source and only available as a hosted service; React Email, the template library Resend maintains, is the open-source part. Plunk is open source under AGPL-3.0, so you can use Plunk Cloud or run the same code on your own servers with Docker.

You verify your domain in Plunk, change your send calls to Plunk’s endpoint, and import your contacts from a CSV. Both use a recipient, subject and HTML body or a template, so the concepts carry over. Most teams finish in an afternoon.

Both have transactional email, broadcasts, automations, segments, webhooks and inbound email. The differences are pricing, where Plunk bills per email and never per contact, and ownership, since Plunk is open source and can run on your own servers.