What is SMTPfast used for?

SMTPfast is a transactional email API built on AWS SES that traces every send, bounce, open and webhook in real time, with searchable delivery logs and signed webhooks. It is a good fit for sending receipts and password resets from an app, and debugging why an email bounced.

Yes. SMTPfast has a free plan, and paid plans start at $9 per month.

Is SMTPfast open source?

No. SMTPfast is proprietary (closed-source) software and can't be self-hosted. In the Email Marketing category, open-source options include Postal, Plunk and Listmonk.

What are some alternatives to SMTPfast?

SMTPfast competes with Postmark, SendGrid and Mailgun.

SMTPfast: features, pricing and alternatives

About SMTPfast

SMTPfast is a transactional email service for developers. You send email through a plain REST call, or through SMTP for older apps, and it traces what happens next: each message's lifecycle from queued to accepted, delivered and opened, plus webhook deliveries, shown live per email. The service is built on AWS SES.

Delivery logs are searchable and show the response the receiving server actually gave beside the message that triggered it. A live tail of delivery events streams to the browser over server-sent events, and bounces carry a type, a subtype and the receiving server's own wording instead of only a status code. Delivery events come back through signed webhooks. Code examples cover Node.js, Python, Ruby, PHP, Go and cURL, and the site has docs, a GitHub link, a comparison page and tools.

Key features

REST API and SMTP for transactional email
Per-email lifecycle trace from queue to open
Searchable delivery logs with server responses
Live tail of delivery events in the browser
Bounce diagnostics with type and subtype
Signed webhooks for delivery events

Good fit for

Sending receipts and password resets from an app
Debugging why an email bounced

Tags: email-api; transactional-email; aws-ses; webhooks; developer-tools; smtp

SMTPfast: questions and answers

What is SMTPfast used for?: SMTPfast is a transactional email API built on AWS SES that traces every send, bounce, open and webhook in real time, with searchable delivery logs and signed webhooks. It is a good fit for sending receipts and password resets from an app, and debugging why an email bounced.
Is SMTPfast free?: Yes. SMTPfast has a free plan, and paid plans start at $9 per month.
Is SMTPfast open source?: No. SMTPfast is proprietary (closed-source) software and can't be self-hosted. In the Email Marketing category, open-source options include Postal, Plunk and Listmonk.
What are some alternatives to SMTPfast?: SMTPfast competes with Postmark, SendGrid and Mailgun.