Close vs SMTP vs SendX vs Campaigner Comparison
Close
Starting at $9 /user/month
- Free Trial
- Individuals
- Freelancers / Consultants
Close stands as a sales engagement CRM tailored to assist SMBs in converting more leads to revenue. They are committed to fostering future-forward businesses: nimble, intelligent teams operating remotely. For tech-savvy…
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…
SendX
Starting at Contact for pricing
- Free Trial
- Large Enterprises
- Medium Business
SendX is email marketing software designed for small and medium businesses to achieve success in email marketing. It includes all the tools you need to create and manage appealing, engaging and effective email marketing…
Campaigner
Starting at $14 /month
- Free Trial
- Large Enterprises
- Medium Business
The Campaigner email marketing software from Constant Contact allows you to easily create, send and track professional emails and newsletters. With the help of a dedicated marketing team, it is simple to use, and will ha…
Close leads on user satisfaction with a 4.6-star rating across 220 reviews.
Close vs SMTP vs SendX vs Campaigner — at a glance
| Feature | Close | SMTP | SendX | Campaigner |
|---|---|---|---|---|
| Rating | 4.6 / 5 | 3.9 / 5 | 4.7 / 5 | 3.0 / 5 |
| Reviews | 220 | 16 | 66 | 595 |
| Starting price | $9 /user/month | Contact for pricing | Contact for pricing | $14 /month |
| Free trial | Yes | No | Yes | Yes |
| Free version | No | No | No | No |
| Best for | Individuals, Freelancers / Consultants, Medium Business | Individuals, Freelancers / Consultants, Large Enterprises | Large Enterprises, Medium Business, Small Business | Large Enterprises, Medium Business, Small Business |
| Category | CRM Software | Transactional Email Software | Email Marketing Software | Email Marketing Software |
| Integrations | 1+ apps | — | — | 7+ apps |
| Platforms | SaaS/Web/Cloud, Mobile - Android, Mobile - iOS | 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 | 24/7 (Live rep), Business Hours, Online | 24/7 (Live rep), Online |
| Certifications | SOC 2, GDPR | — | GDPR | GDPR |
| Data residency | US | US | US | US |
Key differences between Close and SMTP
- Pricing: Close starts at $9 /user/month. SMTP pricing is not publicly listed.
- Free trial: Close offers a free trial; SMTP does not.
- User satisfaction: Close scores higher with a 4.6-star average.
- Deployment: Close supports SaaS/Web/Cloud, Mobile - Android, Mobile - iOS; SMTP supports SaaS/Web/Cloud.
Compare Close vs SMTP vs SendX vs Campaigner — 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 CRM 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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Biggest differences
Start here before you go deeper into features.
Individuals, Freelancers / Consultants, Medium Business
Individuals, Freelancers / Consultants, Large Enterprises
Large Enterprises, Medium Business, Small Business
Large Enterprises, Medium Business, Small Business
Close typically suits Individuals and Freelancers / Consultants. SMTP tends to fit Individuals and Freelancers / Consultants better. The right choice depends on your team size, workflow, and whether a free trial matters.
Description | Close stands as a sales engagement CRM tailored to assist SMBs in converting more leads to revenue. They are committed to fostering future-forward businesses: nimble, intelligent teams ... Read More about Close | 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 | SendX is email marketing software designed for small and medium businesses to achieve success in email marketing. It includes all the tools you need to create and manage appealing, ... Read More about SendX | The Campaigner email marketing software from Constant Contact allows you to easily create, send and track professional emails and newsletters. With the help of a dedicated marketing team, ... Read More about Campaigner |
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Spotsaas ScoreWhat's this? ↗ | 8.6/10 | 7.2/10 | 8.8/10 | 8.8/10 |
User RatingsBased on verified Spotsaas reviews | ||||
Best Company Size | 5–100 employees | 50 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
- All-in-One Communication: Hub Close integrates calling, emailing, and texting directly into the CRM, eliminating the need for third-party tools. This unified approach increases efficiency and reduces costs for growing sales teams.
- Built for Productivity: With features like Sequences, Power Dialer, and task reminders, Close helps sales reps stay organized, automate outreach, and follow up with leads at the right time — all of which drive higher conversion rates.
- Transparent Collaboration with Coaching Tools: The single timeline view ensures complete team visibility on lead activities, and the built-in call coaching enables sales leaders to mentor and improve team performance directly within the platform.
- Reliable Email Delivery: With SMTP, you can ensure that your emails reach their intended recipients without fail. I’ve seen firsthand how businesses benefit from reduced bounce rates and enhanced communication efficiency.
- Scalability: Whether you’re sending a few emails or millions, SMTP scales effortlessly to accommodate your growing needs. This flexibility has proven invaluable for companies looking to expand their outreach without worrying about technical limitations.
- Security Features: Implementing SMTP protocols enhances the security of your email communications. I recommend leveraging its built-in encryption methods to safeguard sensitive information and instill confidence in your stakeholders.
No key benefits available yet.
- Streamlined Email Marketing Automation: With Campaigner, managers can effortlessly automate their email campaigns, saving valuable time while ensuring that no customer is left behind. This means you can focus on strategy while our platform handles the routine.
- Advanced Segmentation Capabilities: Administrators will appreciate the powerful segmentation tools that allow for highly targeted messaging. This ensures that your emails resonate with specific audience segments, ultimately driving higher engagement rates and conversions.
- Robust Analytics and Reporting: Executives benefit from Campaigner’s comprehensive analytics dashboard, which provides actionable insights into campaign performance. You can easily track open rates, click-through rates, and ROI to make informed decisions moving forward.
Best fit
- 5–100 employees
- SaaS, Marketing Agencies, E-commerce, EdTech, Consulting Services, B2B Tech, Remote-first Startups
- Account Executives, Sales Development Representatives, Sales Managers, Founders, Revenue Operations Managers, Customer Success Managers
- 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
No best-fit guidance available yet.
- 50 to 500 employees
- Martech, Revtech, SaaS, and Consulting
- Marketing Managers, Email Marketing Specialists, Digital Marketing Coordinators, and Campaign Strategists
Reasons buyers look elsewhere
- Close is specifically built for SMBs, so larger enterprises with complex sales processes or deeper customization needs may seek platforms with more robust enterprise features.
- While strong on sales engagement, Close doesn’t offer native marketing automation or lead nurturing workflows that other CRMs like HubSpot or ActiveCampaign may provide.
- Users looking for highly customizable or advanced analytics and forecasting capabilities may find Close’s reporting features less extensive compared to solutions like Salesforce or Zoho CRM.
- 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.
No alternatives guidance available yet.
- Users may seek alternatives to Campaigner due to its pricing structure, which could be perceived as high for small businesses or startups looking for more budget-friendly email marketing solutions.
- Some users might find Campaigner's user interface less intuitive compared to competitors, prompting them to explore platforms that offer a more streamlined and user-friendly experience for their email campaigns.
- The need for advanced automation features can drive users away from Campaigner, especially if they require more sophisticated workflows that are better supported by other email marketing tools in the market.
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How do Close, SMTP, SendX and Campaigner Compare on Features?
Total Features | 15 Features | 5 Features | 32 Features | 20 Features |
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Unique Features | No unique features | No unique features | No unique features | No unique features |
Get Quote | Get Quote |
Compare Close, SMTP, SendX and Campaigner 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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Other Details
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Get help choosing | Get help choosing |
Security & Compliance
Certifications, data handling, and security controls for IT and compliance evaluators.
SOC 2 | ✓ Yes | — | — |
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HIPAA | ✗ No | — | ✗ No |
GDPR | ✓ Yes | — | ✓ Yes |
ISO 27001 | ✗ No | — | — |
Single Sign-On (SSO) | ✓ Yes | — | — |
Multi-Factor Auth (MFA) | ✓ Yes | — | — |
Data Encryption | ✓ Yes | — | ✓ Yes |
Audit Logs | ✓ Yes | — | — |
Data Residency | 🇺🇸 US | 🇺🇸 US | 🇺🇸 US |
Close vs SMTP vs SendX User Reviews & Rating Comparison
User Ratings | 4.7 (based on 66 reviews) | 3 (based on 595 reviews) | ||
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Rating Distribution | ||||
Spotsaas Editor’s POV generated by AI | Buyer sentiment Buyer sentiment is very strong across 595 reviews, with consistently positive feedback. What buyers like
Common complaints
| Buyer sentiment Buyer sentiment is mixed to positive across 11 reviews, with clear strengths and a few common watchouts. What buyers like
Common complaints
| Buyer sentiment Buyer sentiment is very strong across 66 reviews, with consistently positive feedback. What buyers like
Common complaints
| Buyer sentiment Buyer sentiment is mixed across 595 reviews, so it is worth reviewing the tradeoffs closely. 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 |
Integrations
Integration with other apps | No Integration information available. | No Integration information available. |
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List of Customers
Customers |  Toggl  Bench  Freightview | No Customers information available. | No Customers information available. |  LG  The UPS Store  CLARINS |
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Media and Screenshots
Screenshots |  12 Screenshots | No screenshots available. |  3 Screenshots |
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Videos |  1 Videos |  1 Videos |  2 Videos |
Alternatives
Alternatives |
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Related Blogs and Articles for Email Marketing Software
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, Close or SMTP?
- Close edges out the other on user ratings (4.6 vs 3.9). That said, the best pick depends on your use case — use the comparison tables above to evaluate each dimension.
- Do Close and SMTP offer a free trial?
- Close offers a free trial. SMTP does not.
- What is the starting price of Close vs SMTP?
- Close starts at $9 /user/month. SMTP starts at Contact for pricing.
- What are the top alternatives to Close?
- Top alternatives to Close include Bigin by Zoho CRM, ClickUp, Zoho CRM, Freshsales, Thryv.
- What are the top alternatives to SMTP?
- Top alternatives to SMTP include Campaigner, Moosend, GreenArrow Engine, MailerSend, Netcore Email API.