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Lettr – Email API

v1.5.0

by vojtechj · updated 1 month ago

Send transactional emails from your site through the Lettr email API.

emailEmail APIlettrsmtptransactional email
WordPress.org SaveAnalyze reviews Track this plugin
Rank
#69,299
No change yet
Active installs (est.)
≈ 3
Fewer than 10 reported · High
Total downloads
579
579 all-time
Rating
–
0 reviews
Support resolved
–
0 of 0 threads, last 2 months
Declining·Downloads -33.3% (30d)·ETA unknown

Lettr at a glance

Lettr is a WordPress plugin by vojtechj with fewer than 10 active installs, the #69,299 most popular plugin on WordPress.org. On a typical day it’s downloaded about 2 times, 33% fewer than the month before. It has no reviews yet. Version 1.5.0 came out on Sep 22, 2026 and is tested up to WordPress 7.0.8. Among the 4 plugins tagged “Email API”, it ranks #3. It was first released in 2026.

Chart time range

Applies to every chart below. History from Oct 9, 2026, 31 days.

Showing the last 30 days. Full history comes with any paid plan.See plans

Downloads over time

Download stats

119 downloads · the last 30 days

Downloads over time
Lettr Compare series
Downloads over time: 30 days across 1 series.01020Oct 9Oct 14Oct 19Oct 24Oct 28Nov 2Nov 7Oct 29, 2026: Tested up to 7.0.8
View as table
DateLettr
Nov 7, 202623
Nov 6, 202621
Nov 5, 20265
Nov 4, 20262
Nov 3, 20267
Nov 2, 20262
Nov 1, 20265
Oct 31, 20262
Oct 30, 20262
Oct 29, 20262
Oct 28, 20262
Oct 27, 20262
Oct 26, 20264
Oct 25, 20262
Oct 24, 20260
Oct 23, 20263
Oct 22, 20265
Oct 21, 20262
Oct 20, 20263
Oct 19, 20262
Oct 18, 20266
Oct 17, 20262
Oct 16, 20261
Oct 15, 20261
Oct 14, 20261
Oct 13, 20264
Oct 12, 20262
Oct 11, 20261
Oct 10, 20263
Oct 9, 20262

Unusual spikes are usually updates, not new installs.

Estimated installs

≈ 3 · +50.0% in the last 30 days

Estimated installs
Estimated installs: 11 days across 1 series.246Oct 28Oct 30Nov 1Nov 4Nov 8Oct 29, 2026: Tested up to 7.0.8
View as table
DateEstimated installs
Nov 8, 20263
Nov 7, 20266
Nov 5, 20265
Nov 4, 20262
Nov 3, 20262
Nov 2, 20263
Nov 1, 20263
Oct 31, 20263
Oct 30, 20263
Oct 29, 20266
Oct 28, 20262

Rank over time

#69,299 · up 2,536 in the last 30 days

Popular rank
Popular rank: 10 days across 1 series.#60K#65K#70KOct 28Oct 30Nov 1Nov 5Nov 8Oct 29, 2026: Tested up to 7.0.8
View as table
DateDaily snapshot
Nov 8, 2026#69,299
Nov 6, 2026#57,865
Nov 5, 2026#58,979
Nov 3, 2026#71,690
Nov 2, 2026#68,719
Nov 1, 2026#68,607
Oct 31, 2026#68,241
Oct 30, 2026#68,373
Oct 29, 2026#56,758
Oct 28, 2026#71,835

Growth %

Average +3.75% a day in the last 30 days

Growth %, day over day
Growth %, day over day: 10 days across 1 series.-200%0%200%Oct 29Oct 31Nov 3Nov 5Nov 8
View as table
DateGrowth
Nov 8, 2026-50.00%
Nov 7, 2026+10.00%
Nov 5, 2026+150.00%
Nov 4, 20260.00%
Nov 3, 2026-33.33%
Nov 2, 20260.00%
Nov 1, 20260.00%
Oct 31, 20260.00%
Oct 30, 2026-50.00%
Oct 29, 2026+200.00%

Active installs band

Fewer than 10 on WordPress.org

Active installs (rounded band)
Active installs (rounded band): 13 days across 1 series.-101Oct 27Oct 29Oct 31Nov 2Nov 4Nov 6Nov 8Oct 29, 2026: Tested up to 7.0.8
View as table
DateDaily snapshot
Nov 8, 2026Fewer than 10
Nov 7, 2026Fewer than 10
Nov 6, 2026Fewer than 10
Nov 5, 2026Fewer than 10
Nov 4, 2026Fewer than 10
Nov 3, 2026Fewer than 10
Nov 2, 2026Fewer than 10
Nov 1, 2026Fewer than 10
Oct 31, 2026Fewer than 10
Oct 30, 2026Fewer than 10
Oct 29, 2026Fewer than 10
Oct 28, 2026Fewer than 10
Oct 27, 2026Fewer than 10

Search rankings

Where it appears in WordPress.org search for the searches you track, checked every day.

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Change log

From our daily snapshot of WordPress.org
  1. Rank #71835 → #58979Downloads +150%
    • Tested up to 7.0.7 → 7.0.8

Requirements & info

Version history
Version
1.5.0
Requires WordPress
5.8
Tested up to
7.0.8
Requires PHP
7.2
First released
May 19, 2026
Last updated
Sep 22, 2026
Releases, last 12 months
…

Questions about Lettr

How many websites use Lettr?

Lettr is active on fewer than 10 WordPress sites, as WordPress.org reports it. That makes it the #69,299 most popular plugin on WordPress.org.

How many times has Lettr been downloaded?

579 times in total since 2026. On a typical day it’s downloaded about 2 times. See download stats

When was Lettr last updated?

Version 1.5.0 came out on Sep 22, 2026 (1 month ago).

Is Lettr compatible with the latest WordPress?

It’s tested up to WordPress 7.0.8, one version behind the current 7.1. Authors often update this line a few weeks after a release.

Is Lettr still maintained?

Yes. Its last release was 1 month ago. No support threads were opened in the last two months.

What rating does Lettr have?

No one has reviewed Lettr on WordPress.org yet.

What are the best alternatives to Lettr?

The plugins most like Lettr, by the tags they share, are Email Deliverability (200K+), WP Mail SMTP by WPForms (4M+) and Easy WP SMTP (500K+). Compare all alternatives

Compare with competitors

Add up to 1 competitor. No account needed.

Starter · 1 competitor
Lettr
Suggested:
Metric
Lettr
Estimated installs≈ 3
Reported installsFewer than 10
Rating–
Reviews0
Total downloads579
Authorvojtechj
First releasedMay 19, 2026
Version1.5.0
Requires WP5.8
Requires PHP7.2
Last updatedSep 22, 2026

Alternatives to Lettr

Compare all alternatives

Popular plugins with the same tags, the most in common first.

Side by side:Lettr vs Email DeliverabilityLettr vs WP Mail SMTP by WPFormsLettr vs Easy WP SMTP