MailUp vs Rejoiner vs Moosend vs SMTP Comparison
MailUp
Starting at Contact for pricing
- Free Trial
- Large Enterprises
- Medium Business
MailUp is a simple solution to Design, Send and Automate Marketing Campaigns via Email, SMS and Messaging Apps. Boost your performance and Send millions of emails in just a few clicks. The Marketing automation tools you…
Rejoiner
Starting at Contact for pricing
- Large Enterprises
- Medium Business
Rejoiner is a follow-up email marketing software system. Rejoiner is built with retailers in mind and helps anyone who has a list of customers communicate with them regularly. Key features include integrated autoresponde…
Moosend
Starting at Contact for pricing
- Large Enterprises
- Medium Business
Moosend is a powerful Email Marketing Software for small businesses that's easy to use and affordable, with a robust feature set. With its user-friendly interface and newbie-friendly training, Moosend makes it easy to cr…
SMTP
Starting at Contact for pricing
- Individuals
- Freelancers / Consultants
SMTP was built to solve the challenges of sending email from devices behind restrictive firewalls or communicating directly with a server over SMTP. It features multiple design elements and components that have been opti…
MailUp leads on user satisfaction with a 3.7-star rating across 55 reviews.
MailUp vs Rejoiner vs Moosend vs SMTP — at a glance
| Feature | MailUp | Rejoiner | Moosend | SMTP |
|---|---|---|---|---|
| Rating | 3.7 / 5 | — | 4.3 / 5 | 4.3 / 5 |
| Reviews | 55 | — | 416 | 11 |
| Starting price | Contact for pricing | Contact for pricing | Contact for pricing | Contact for pricing |
| Free trial | Yes | No | No | No |
| Free version | No | No | No | No |
| Best for | Large Enterprises, Medium Business, Small Business | Large Enterprises, Medium Business, Small Business | Large Enterprises, Medium Business, Small Business | Individuals, Freelancers / Consultants, Large Enterprises |
| Category | Email Marketing Software | Email Marketing Software | Email Marketing Software | Transactional Email Software |
| Platforms | SaaS/Web/Cloud | SaaS/Web/Cloud | SaaS/Web/Cloud | SaaS/Web/Cloud |
| API | Available | Available | Available | Available |
| Support modes | Business Hours, Online | 24/7 (Live rep), Business Hours, Online | Business Hours, Online | 24/7 (Live rep), Business Hours, Online |
| Certifications | — | — | GDPR | — |
| Data residency | US | US | US | US |
Key differences between MailUp and Rejoiner
- Free trial: MailUp offers a free trial; Rejoiner does not.
- Deployment: MailUp supports SaaS/Web/Cloud; Rejoiner supports SaaS/Web/Cloud.
Compare MailUp vs Rejoiner vs Moosend vs SMTP — and walk away knowing which one fits.
Which tool fits your team best
Which is actually cheaper for your team size
Where each product wins, per real buyers
Most Email Marketing Software tools look identical on paper. This comparison cuts to the differences that matter — pricing structure, team fit, and what real buyers found after signing up.
Biggest differences
Features
Pricing
Buying details
Security
Buyer feedback
Integrations
Product tour
Other options
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MailUp, Rejoiner, Moosend vs SMTP: Biggest differences
Start here before you go deeper into features.
Large Enterprises, Medium Business, Small Business
Large Enterprises, Medium Business, Small Business
Large Enterprises, Medium Business, Small Business
Individuals, Freelancers / Consultants, Large Enterprises
MailUp typically suits Large Enterprises and Medium Business. Rejoiner tends to fit Large Enterprises and Medium Business better. The right choice depends on your team size, workflow, and whether a free trial matters.
Description | MailUp is a simple solution to Design, Send and Automate Marketing Campaigns via Email, SMS and Messaging Apps. Boost your performance and Send millions of emails in just a few clicks. The ... Read More about MailUp | Rejoiner is a follow-up email marketing software system. Rejoiner is built with retailers in mind and helps anyone who has a list of customers communicate with them regularly. Key features ... Read More about Rejoiner | Moosend is a powerful Email Marketing Software for small businesses that's easy to use and affordable, with a robust feature set. With its user-friendly interface and newbie-friendly ... Read More about Moosend | SMTP was built to solve the challenges of sending email from devices behind restrictive firewalls or communicating directly with a server over SMTP. It features multiple design elements and ... Read More about SMTP |
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Free Trial Availability |
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SpotScoreWhat's this? ↗ | 8.7/10 | 8.6/10 | 8.8/10 | 7.2/10 |
User RatingsBased on verified Spotsaas reviews | ||||
Best Company Size | — | — | 1 to 500 employees | 50 to 500 employees |
Get pricing help | Get pricing help |
Where each option fits best
See where each product is strongest, which teams it fits, and what causes buyers to keep looking — before you commit.
Based on buyer reviews and verified product data collected by Spotsaas.
Key strengths
- Email Marketing: Moosend is an intuitive platform that lets teams create, automate, and analyze email campaigns, keeping you connected with your audience without unnecessary complexity.
- Advanced Automation Features: The reliable automation capabilities let you trigger personalized messages based on user behavior. This means you can nurture leads effectively while your team focuses on strategic initiatives.
- Real-Time Analytics: Moosend provides comprehensive reporting tools that give you insights into campaign performance. This data-driven approach helps executives make informed decisions to optimize marketing strategies and boost ROI.
- Reliable Email Delivery: With SMTP, your emails reach their intended recipients consistently. Businesses benefit from reduced bounce rates and improved communication efficiency.
- Scalability: Whether you're sending a few emails or millions, SMTP scales easily to meet your growing needs. This flexibility helps companies expand their outreach without hitting technical limits.
- Security Features: SMTP protocols improve the security of your email communications. Use its built-in encryption methods to protect sensitive information and build stakeholder trust.
Best fit
- 1 to 500 employees
- Martech, SaaS, E-commerce, Digital Marketing, and Nonprofit sectors
- Marketing Managers, E-commerce Managers, Digital Marketers, Content Creators, and Marketing Automation Specialists
- 50 to 500 employees
- Martech, Fintech, SaaS, E-commerce, and Digital Marketing
- Marketing Managers, IT Administrators, Email Marketing Specialists, Sales Executives, and Customer Success Managers
Reasons buyers look elsewhere
- Lacks advanced automation workflows — teams needing complex multi-step sequences often switch to HubSpot or ActiveCampaign
- Price-sensitive buyers find cheaper alternatives like Mailchimp or Klaviyo that cover basic email marketing at half the cost
- Limited onboarding and support — companies wanting hands-on training or dedicated account management choose platforms with stronger customer success teams
- Users may seek alternatives to SMTP due to deliverability issues, as emails can often be marked as spam or face filtering challenges, impacting communication effectiveness and business operations.
- Security concerns are a common reason for exploring alternatives; SMTP lacks advanced encryption and authentication measures, making it vulnerable to interception and unauthorized access.
- The increasing need for real-time communication drives users towards alternatives that offer instant messaging or collaboration features, which are not supported by traditional SMTP protocols.
Software Demo
Demo |
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How do MailUp, Rejoiner, Moosend and SMTP Compare on Features?
Total Features | 20 Features | 23 Features | 22 Features | 5 Features |
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Unique Features | No unique features | No unique features | No unique features | No unique features |
Get Quote | Get Quote |
Compare MailUp, Rejoiner, Moosend and SMTP on pricing
Review starting price, plan structure, and free-trial access side by side so you can see which option fits your budget and buying process.
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MailUp, Rejoiner, Moosend vs SMTP: Other Details
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Get help choosing | Get help choosing |
MailUp, Rejoiner, Moosend vs SMTP Security & Compliance
Certifications, data handling, and security controls for IT and compliance evaluators.
HIPAA | ✗ No | ✗ No |
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GDPR | — | — |
Data Encryption | — | — |
Data Residency | 🇺🇸 US | 🇺🇸 US |
MailUp vs Rejoiner vs Moosend User Reviews & Rating Comparison
User Ratings | 3.7 (based on 55 reviews) | No reviews available for the product | 4.3 (based on 416 reviews) | |
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Rating Distribution | No reviews available for this product | |||
Spotsaas Editor’s POV generated by AI | Buyer sentiment Buyer sentiment is mixed to positive across 55 reviews, with clear strengths and a few common watchouts. What buyers like
Common complaints
| What buyers like
Common complaints
| Buyer sentiment Buyer sentiment is positive across 416 reviews, with strong overall satisfaction. What buyers like
Common complaints
| Buyer sentiment Buyer sentiment is positive across 11 reviews, with strong overall satisfaction. What buyers like
Common complaints
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Pros and Cons |
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Positive Reviews | No reviews available for the product | No reviews available for the product | No reviews available for the product | No reviews available for the product |
| Negative Reviews | No reviews available for the product | No reviews available for the product | No reviews available for the product | No reviews available for the product |
Media and Screenshots
Screenshots |  3 Screenshots |  1 Screenshots |
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Videos |  4 Videos |  3 Videos |
Alternatives to MailUp, Rejoiner, Moosend, SMTP
Alternatives |
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Disclaimer: This research has been collated from a variety of authoritative sources. We welcome your feedback at [email protected].
Frequently asked questions
- Which is better, MailUp or Rejoiner?
- MailUp edges out the other on user ratings (3.7 vs -1.0). That said, the best pick depends on your use case, so use the comparison tables above to evaluate each dimension.
- Do MailUp and Rejoiner offer a free trial?
- MailUp offers a free trial. Rejoiner does not.
- What is the starting price of MailUp vs Rejoiner?
- MailUp starts at Contact for pricing. Rejoiner starts at Contact for pricing.
- What are the top alternatives to MailUp?
- Top alternatives to MailUp include Moosend, SMTP, EmailOctopus, VerticalResponse, OpenMoves OM3.
- What are the top alternatives to Rejoiner?
- Top alternatives to Rejoiner include Moosend, SMTP, EmailOctopus, Salesforce Email Studio, Mailigen.