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Retainful

Name: Retainful
Author: Retainful

by Retainful

Free plan Web

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What Retainful is

Retainful is a web-based email service from Retainful, a maker headquartered in Singapore. It provides email automation, audience segmentation, and A/B testing for organizing and refining email campaigns. The service uses freemium pricing, with a Free plan that costs $0.00 USD and remains free forever. That plan allows 500 emails per month. The Pro plan starts at $14 a month for up to 1,000 contacts and includes 10,000 emails per month. Each additional 500 contacts on Pro adds $4 per month. The listed Pro limits are 1,000 subscribers and 10,000 monthly emails. Retainful runs on the web, with no other platform listed. The combination of automated sending, audience grouping, and alternative testing suits senders who need campaign tools at different contact volumes. The main plan choice depends on whether 500 monthly emails are enough or a larger allowance and contact-based pricing are needed.

Who it suits

Retainful suits email senders who need automation, audience segmentation, and A/B testing through a web service. It also fits users choosing between a permanent free allowance and a Pro plan for up to 1,000 contacts.

What it does well

Free plan remains free forever
Email automation is included
Supports audience segmentation
Includes A/B testing
Pro allows 10,000 emails monthly

What to know first

Free plan allows 500 emails monthly
Pro starts at $14 per month
Additional contacts add $4 per 500
Web platform only

Plans

Plan	Billed and limits	Price
Free	Free forever; 500 emails per month · 500 emails/month	Free
Pro	Starts at $14/month for up to 1,000 contacts; every 500 contacts after that adds $4/month · Up to 1,000 contacts · 10,000 emails/month	$14 a month

As retainful.com lists them, read 20 Sept 2026. The maker's own page has the final word.

Verdict

Retainful offers core email campaign features with a permanent free plan and a Pro tier. Compare your monthly email volume and contact count with each plan’s stated limits.

Facts from Retainful's own pages

A/B testing: Yes · retainful.com, 20 Sept 2026
Email automation: Yes · retainful.com, 20 Sept 2026
Free plan: Yes · retainful.com, 20 Sept 2026
Headquarters: Singapore · retainful.com, 28 Sept 2026
Monthly send limit: 10000 · retainful.com, 20 Sept 2026
Audience segmentation: Yes · retainful.com, 20 Sept 2026
Paid from: 14 · retainful.com, 20 Sept 2026
Subscriber limit: 1000 · retainful.com, 20 Sept 2026