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FluentSMTP

FluentSMTP – WP Mail SMTP Plugin with Amazon SES, SendGrid, Mailgun, Postmark, Cloudflare, toSend, Gmail and Any SMTP

Free WP Mail SMTP plugin. Fix WordPress email deliverability with Gmail, Amazon SES, SendGrid, Mailgun, Postmark, Cloudflare, Brevo or any SMTP.

★★★★★4.8 (410) · 700k+ active installs
Free
Website ↗ WordPress.org ↗
what mrrlens sees
MRR · Freemium · upsell unknownPrice not published
Opportunity—
Buyer threads · 30 d0
“It doesn’t send or receive any emails.”
#1 complaint · Bugs/Reliability · 54% of complaints read · analysed Oct 29, 2026 · source

01Revenue

Price not publishedFreemium · upsell unknown
Why there is no estimate

FluentSMTP has a paid tier, but the listing publishes no price. Without one, any revenue figure would rest on a guessed price, so MRRLens shows none and leaves revenue out of its opportunity score.

Exploratory math, not an estimate: if it charged a typical price for its marketplace, active users × paid conversion × monthly price would give $28k–140k a month. Assumptions: active users: 700k; 0.5%–2.5% of active users pay; no public price: assumed $8.00/month, typical for this marketplace. Methodology.

2 daily snapshots · growth 30 d: —

Store data from the WordPress.org listing, refreshed daily. Updated 17 h ago. Listed since 2021.

02Why users leave FluentSMTP

5★93%
4★2%
3★1%
2★1%
1★3%
Bugs/Reliability6 reviews · 54%

Emails fail to send/receive; Office 365 and test sends blocked; SendGrid keys lost; staging reauth; PHP 8 gaps.

“It doesn’t send or receive any emails.” source ↗
2 more complaints, with verbatim quotesIncluded in the day pass and Pro.
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Sample: 11 recent complaints (1–3★ reviews) · clustered Oct 29, 2026 · complaints from Jun 2023–Apr 2026, 36% in the last 24 months — mostly history · each review labelled by a model, quotes verbatim

03How to build a better FluentSMTP

Build difficultyMediumMultiple email-provider APIs, deliverability diagnostics, WordPress/PHP compatibility, and staging-safe configuration; no payments or hardware.
Three build ideas that answer these complaintsIncluded in the day pass and Pro.
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04Who wants a better FluentSMTP

0 buyer threads in the last 30 days name FluentSMTP, and 1 more is in the same market.

05Questions about FluentSMTP

How much revenue does FluentSMTP make?

MRRLens shows no revenue figure for FluentSMTP. It sells a paid tier but does not publish the price, and an estimate built on an assumed price would be a guess. The exploratory math is on the page, labelled as such.

What do users complain about most in FluentSMTP?

Across 11 recent complaints, the most common is bugs/reliability (54%). Emails fail to send/receive; Office 365 and test sends blocked; SendGrid keys lost; staging reauth; PHP 8 gaps.

What are the best FluentSMTP alternatives?

The closest alternatives MRRLens found are WP Mail SMTP by WPForms, Post SMTP and Easy WP SMTP. The full list, with why users leave, is on the FluentSMTP alternatives page.

How many people use FluentSMTP?

FluentSMTP lists 700k+ active installs on WordPress.org, rated 4.8 (410).

See the full x-ray of FluentSMTP

Full 1-star breakdown with verbatim quotes, the build blueprint and every live thread — on every product.