Mailster
Mailster: A self-hosted WordPress email tool with automation, segmentation, and provider integrations. Ranked #145 of 185 in Email Marketing Software by our editors (3.0/10); pricing: Paid; best for wordPress users wanting self-hosted automation.
At a glance
- Editor score3.0 / 10
- PricingPaid
- Best forWordPress users wanting self-hosted automation
- Free planNo
- Email automationYes
- Facts checked23 Sep 2026
Where it wins
- Automates welcome, birthday, drip, follow-up, and autoresponder campaigns
- Supports rule-based segmentation, forms, popups, and RSS-to-email
- Connects with SMTP, external providers, and WordPress plugins
Where it doesn't
- Requires self-hosted WordPress and server infrastructure for sending
- Plan pages list the same core highlights across Starter, Professional, and Agency
- No verified A/B testing or landing-page builder capability
Our verdict on Mailster
Mailster is an open-source, self-hosted WordPress plugin for creating and sending newsletters and automated email campaigns. It suits WordPress site owners who want subscriber data stored in their own site database, with control over forms, lists, templates, delivery, and campaign reporting. Its feature set covers a drag-and-drop editor, merge tags, custom templates, rule-based segmentation, signup forms and popups, RSS-to-email campaigns, time-zone-based sending, and analytics for campaigns and subscribers.
Mailster is sold through paid licenses rather than a free plan. The published plans are Starter, Professional, and Agency. Each plan lists one site/domain, one year of support, one year of updates, unlimited subscribers, unlimited lists, and unlimited forms. The shared highlights make the plan names less informative for buyers comparing core functionality. Delivery costs and sending capacity also depend on the server infrastructure and the selected SMTP or external email provider, so the license is only one part of the operating setup.
Its strongest ecosystem fit is WordPress: integrations and add-ons connect Mailster with tools including Gravity Forms, Contact Form 7, MemberPress, Easy Digital Downloads, WS Form, and Super Forms. Delivery options include Mailjet, Mailgun, Gmail, MailerSend, SparkPost, and SendGrid, while Mailchimp Importer supports migration of subscriber data. Choose Mailster if WordPress ownership, self-hosting, and flexible automation matter more than a hosted email service. Consider another product if verified A/B testing, landing-page creation, or a more clearly differentiated tier structure is central to your buying decision.
Your product? Our editors can test Mailster in depth and publish a review, labelled as paid · from $149/mo →
Mailster pricing
All 3 Mailster plans and prices →
Mailster fact sheet
| Free plan | No |
|---|---|
| Paid from | Not verified |
| Subscriber limit | Not verified |
| Monthly send limit | Not verified |
| Email automation | Yes |
| Audience segmentation | Yes |
| Landing pages | Not verified |
| A/B testing | Not verified |
| Native integrations | Not verified |
| Money-back guarantee | 14 days |
| Deployment | Self-hosted |
| Platforms | Web |
| Compliance & security | GDPR |
| Support | Email, Docs |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Integrations | 18 integrations: WS Form, Super Forms, MailJet, Simple Giveaways, Live!, Gravity Forms … See all → |
| Pricing | Paid (source) |
| Website | mailster.co |
| Facts checked | 23 Sep 2026 |
Mailster integrations
Mailster lists 18 integrations on its own site.
- WS Form
- Super Forms
- MailJet
- Simple Giveaways
- Live!
- Gravity Forms
- Mailgun
- Gmail
- MailerSend
- SparkPost
- Easy Digital Downloads
- Mailchimp Importer
- MemberPress
- Contact Form 7
- SendGrid
- Google Analytics
- reCaptcha
- FormCraft
See all Mailster integrations →
Alternatives to Mailster
- KlaviyoA strong fit for ecommerce teams that need behavioral personalization across channels.9.3
- ActiveCampaignA mature choice for complex automation, segmentation, and large contact lists.9.2
- MailchimpA broad email marketing suite with a free plan and $13 monthly paid entry.9.1
See all Mailster alternatives →
Used Mailster? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Mailster for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
Mailster is listed in our Email Marketing Software directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/mailster/"><img src="https://www.itechguides.com/best/badge/mailster.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update