Mailster vs Newsletter Glue (2026): which should you pick?
As of Nov 13, 2026, Mailster and Newsletter Glue share a 1.8 GPA, neither has a free plan, and Mailster starts cheaper, at $6.58 a month when paid by the year against $24 a month.
Checked Nov 12, 2026 and Nov 13, 2026 · graded Nov 13, 2026 by ToolGPA
Mailster grades higher on value for money. Newsletter Glue grades higher on ease of use. They get the same grade on the free plan, features and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Newsletter Glue
WordPress plugin for building and sending newsletters
Which one is for you
Pick Mailster if
- Fits if you already run WordPress and want your subscriber list kept in your own database
- Works for sites that send their latest posts or products to a list
Look elsewhere if
- Skip it if your site isn't on WordPress, because the plugin only runs there
- Tight if you want to send for free: there's no free edition and no trial
- Watch out: it renews at full price after the first year, and each licence covers one site
- Not for you if you don't want to set up a separate sending provider, since Mailster doesn't send the mail itself
- Tight if you need more than 3 automations, which is the Starter limit
Pick Newsletter Glue if
- Fits if your newsletter lives on a WordPress site and you'd rather not copy issues into another tool
- Works for publishers who already send through Mailchimp or Brevo and want to write in WordPress instead
Look elsewhere if
- Skip it if you don't run WordPress, since it isn't a standalone product
- Tight if you want to try before paying: no free plan or trial, only a 14-day refund
- Pricey if you want to keep your own email provider, as Connect is $99 a month on yearly billing
- Watch out: each plan covers 1 site, and sending plans climb to $1,499 a month at 5,000,000 sends
- Watch out: the classic WordPress editor isn't officially supported
How we grade them
| 1.8GPAMailsterWeak | 1.8GPANewsletter GlueWeak | |
|---|---|---|
| Value for money | B$79 a year for 1 site is about $6.60 a month, inside the cheaper quarter of email tools ($9.99). The first-year price is $39, then it renews at full price, and you pay your sending provider on top. | C$24 a month on yearly billing for up to 25,000 sends, $29 if you pay monthly. Email marketing tools start around $10 and the middle is $20, so this sits in the ordinary range. |
| Free plan and trial | FNo free edition and no trial. There's a demo and a 14-day money-back guarantee, which isn't the same thing. | FNo free plan and no trial. There's a 14-day money-back guarantee, but that's a refund, not a free go. |
| Features | CNewsletters, drip emails, post-triggered sends, a template editor and segmentation. But Starter has 3 automations, and it doesn't send mail itself, so delivery depends on the provider you connect. | CBlock-editor newsletters, a template builder, automated newsletters and a draft builder called Magic Glue. The listing says it runs only in WordPress, covers 1 site per plan, and the pro blocks need the block editor. |
| Ease of use | DYou need a WordPress site that you host and keep updated, plus an SMTP or email-service connection. No rating on record. | CNo store rating on record. It's a plugin you set up inside WordPress, then connect to its own sending or your email provider. |
| Platforms and integrations | BWeb only, inside WordPress, but it connects to Mailgun, SendGrid, SparkPost, Mailjet, Gmail and Gravity Forms, among others. | BWorks inside WordPress and connects to 21 email providers on the Connect plan, including Mailchimp, Kit, Brevo and HubSpot. No standalone app and no phone app. |
| Best for | newsletters sent from inside your own WordPress site | sending newsletters from a WordPress site |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Mailster and Newsletter Glue. How we grade
Price against what you get
Mailster starts at $6.58 a month when paid by the year and scores 2.0 out of 4 on features, ease of use and platforms. Newsletter Glue starts at $24 a month and scores 2.3.
Newsletter Glue scores higher, and starts $17.42 a month higher: the question is whether the extra is worth that to you. Of the other email marketing and newsletter tools on the chart, 6 score higher than Mailster for less, and 23 score higher than Newsletter Glue for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- Mailster also covers marketing automation, forms and rSS reader.
At a glance
| Mailster | Newsletter Glue | |
|---|---|---|
| Pricing | Paid | Paid |
| Starts at | $79 per year for 1 site, renewing at full price after a first-year price of $39 | $24 per month for up to 25,000 sends a month, billed yearly ($29 billed monthly) |
| Free plan | None | None |
| Free trial | None listed | None listed |
| Web | ||
| Made by | Mailster | Newsletter Glue |
| Price read from | mailster.co | newsletterglue.com |
| Checked | Nov 12, 2026 | Nov 13, 2026 |
Worth knowing
Mailster
- It runs only inside WordPress, and every licence covers one site or domain.
- There is no free edition; the site offers a demo and a 14-day money-back guarantee.
- Updates and support need an active licence. The plugin keeps working after expiry, but renewals are at full price.
- Mailster does not send mail itself. Deliverability depends on the email provider or server you connect, and the vendor recommends a dedicated provider.
Newsletter Glue
- It runs only inside WordPress; it is not a standalone product.
- There is no free plan or trial, only a 14-day money-back guarantee.
- The built-in sending plan is priced by monthly sends, rising to $1,499 a month, billed yearly, at 5,000,000 sends.
- Each plan covers 1 site; the classic WordPress editor is not officially supported and the pro blocks need the block editor.
Key features
Mailster
- Newsletters and automation
- Send newsletters, welcome emails, birthday emails, drip campaigns and autoresponders. The number of automations depends on the tier.
- Send your latest posts
- Send new posts, products, events or other custom post types, and use them to trigger automations.
- Editor and templates
- A drag-and-drop editor with more than 400 free and premium templates.
- Any sending provider
- Mail can go out through SMTP or an email service provider; integrations are available for services such as Mailgun, SendGrid, SparkPost, Mailjet and Gmail.
- Segmentation and tracking
- Segment subscribers and track opens, clicks, email providers and locations from within WordPress.
- Precheck
- A pre-send check that flags issues in a campaign, capped at 10, 100 or 1,000 runs a month by tier.
Newsletter Glue
- Write in the WordPress editor
- Build each newsletter with WordPress blocks, in the same editor used for articles.
- Template builder
- Design newsletter templates from blocks, add custom CSS, post embeds and custom HTML such as ad-network code.
- Magic Glue
- Creates a draft newsletter from your latest posts, with subject line, preview text and intro, included on both plans.
- Send to inboxes and the site
- Each issue goes to the chosen list or segment and is published to a searchable archive on your site.
- Email service connections
- Connect an existing provider once and send to its lists and segments, or send through Newsletter Glue's own engine on the cheaper plan.
- Automated newsletters
- Both plans list automated newsletters; the Connect plan can also save drafts as templates for drip automation in your provider.
Plans
Mailster
Starter$79
per year for 1 site
Unlimited subscribers, 3 automations, 10 prechecks a month, 10 free templates. $39 for the first year in a Black Friday listing; renewals at full price.
Professional$99
per year for 1 site
Adds 10 automations, 100 prechecks a month and 7 premium templates. Shown at $49 for the first year in a Black Friday listing, with renewals at the full price.
Agency$199
per year for 1 site
Unlimited automations and 1,000 prechecks a month. Shown at $99 for the first year in a Black Friday listing, with renewals at the full price.
Newsletter Glue
Newsletter Glue$24
per month for up to 25,000 sends, billed yearly ($29 monthly)
Sends through Newsletter Glue's own engine, with unlimited subscribers and no separate email service needed. $74 a month at 100,000 sends, billed yearly ($89 billed monthly).
Newsletter Glue Connect$99
per month, billed yearly ($149 billed monthly)
Builds newsletters in WordPress and sends through your own provider, with 21 integrations and Slack support. Unlimited subscribers, 1 site plus unlimited staging.
Ways to pay less
Mailster
- Other savings
First-year price in a Black Friday listing
The pricing page currently shows $39, $49 and $99 for Starter, Professional and Agency, against $79, $99 and $199 regular prices, and states that renewals are at full price. It gives no end date.
Newsletter Glue
- Annual discount
2 months free with yearly billing
The pricing page notes 2 months free on yearly billing; for example $24 a month yearly against $29 monthly on the first send tier.
Common questions
Which is cheaper, Mailster or Newsletter Glue?
As of Nov 13, 2026, Mailster is cheaper to start with: $6.58 a month when paid by the year, against $24 a month for Newsletter Glue. Mailster starts at $79 per year for 1 site, renewing at full price after a first-year price of $39, and Newsletter Glue starts at $24 per month for up to 25,000 sends a month, billed yearly ($29 billed monthly).
Which has a free plan, Mailster or Newsletter Glue?
As of Nov 13, 2026, neither Mailster nor Newsletter Glue has a free plan.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.