FluentSMTP vs SendLayer (2026): which should you pick?

Pick FluentSMTP if

• Fits if you run WordPress and want logs and a fallback without paying
• Works for sites already on Amazon SES or Mailgun that need a way to connect

Look elsewhere if

• Skip it if you don't run WordPress, as it only works inside it
• Not for you if you want a sending service: it's a connector and deliverability depends on the provider you pick
• Watch out: you need a separate provider account, which has its own pricing
• Watch out: Zoho Mail connects through SMTP, not an API

Pick SendLayer if

• Fits if you run a WordPress or WooCommerce site and send order mail
• Works for small senders under 10,000 emails a month

Look elsewhere if

• Skip it if you want a free plan, as there is only a 200-email trial
• Tight if you want to pay monthly, since every plan is billed annually
• Watch out: your plan is upgraded automatically when you reach its monthly email limit
• Not for you if you send marketing campaigns, because it is a transactional service
• Tight if you need long logs, as Starter keeps 3 days

FluentSMTP

• Runs only inside WordPress; it needs an account with a separate email provider, which has its own pricing.
• It is a connector, not a sending service, so deliverability depends on the provider you choose.
• Zoho Mail is connected through SMTP rather than an API, according to the plugin listing.

SendLayer

• All plans are billed annually; the pricing page shows no monthly-billing option.
• It has no permanent free plan, only a trial of up to 200 emails.
• Per its FAQ, a plan is upgraded automatically if you reach its monthly email limit.
• It is a transactional email service, not a tool for marketing campaigns.

FluentSMTP

Provider connections

Connects to Amazon SES, Gmail and Google Workspace, Microsoft 365, SendGrid, Mailgun, Postmark, Brevo, SparkPost, SMTP2GO, Elastic Email and any SMTP server.

Multiple connections and routing

Several providers can be connected at once, and each email is routed to one based on its From address.

Fallback connection

A secondary connection takes over when the primary one fails.

Email log and resend

Logs sent emails with headers, body and the server's response, and lets you resend a logged email.

Failure alerts

Notifies you by email, Telegram, Slack, Discord or Pushover when delivery fails, according to the plugin listing and the vendor site.

Migration from other plugins

Imports settings from WP Mail SMTP or Easy WP SMTP, and works with WP-CLI.

SendLayer

SMTP relay and API

Every plan can send through an SMTP relay, set up by copying credentials, or through an email API.

Email logs

Logs trace each message to its destination. Retention runs from 3 days on Starter to 30 days on Growth and Scale.

Open and click tracking

Engagement can be checked per message and filtered by status or recipient, with an analytics view on every plan.

Suppression and bounce handling

Suppression, bounce and blocklist management are listed on every plan, along with event-based webhooks.

Domain authentication

DKIM, SPF and DMARC authentication are listed on every plan, with a limit on sender domains per plan.

FluentSMTP

• Free$0

  All features and integrations, with no paid edition. The vendor says it is free and open source, and pledges that it stays free.

SendLayer

• Starter$5

  per month for 1,000 emails, billed annually

  1 sender domain, 3 days of log retention and standard support.

• Business$15

  per month for 5,000 emails, billed annually

  3 sender domains, 15 days of log retention and premium support.

• Growth$25

  per month for 10,000 emails, billed annually

  5 sender domains, 30 days of log retention and premium support.

• ScaleCustom

  20,000+ emails a month, 20 sender domains, 30 days of logs and VIP support. Quote on request.

FluentSMTP

No public discounts listed.

SendLayer

• Other savings

  14-day money-back guarantee

  The pricing page says that within 14 days of starting, you can ask for a full refund if SendLayer is not a fit.