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SendHQ is an email API for verified-domain transactional sending, inbound email, delivery events, scoped API keys, and observable agent workflows.
Helo is a pay-as-you-go email API for developers, built by a team of experienced email professionals. Helo competes with other API-based email services such as Resend, Postmark, Sendgrid, and Mailgun. Helo offers a full-featured API, SDKs in multiple languages, great customer support, and reliable email sending.
