Close vs Postmark vs SMTP vs Campaigner Comparison
Close
Starting at $9 /user/month
- Free Trial
- Individuals
- Freelancers / Consultants
Close is a sales engagement CRM built for SMBs that lets teams email, call, and text leads directly from the platform without additional add-ons. It includes Sequences, task reminders, and a Power Dialer, with all activi…
Postmark
Starting at Contact for pricing
- Free Trial
- Individuals
- Freelancers / Consultants
Postmark is the transactional email software service that fixes your deliverability, increases engagement, and manages spam complaints. It works with any email service provider or hosted application to improve deliverabi…
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…
Campaigner
Starting at $14 /month
- Free Trial
- Large Enterprises
- Medium Business
Campaigner is an email marketing and automation platform used by mid-size marketing teams that need behavior-triggered campaigns across email and other channels. It solves the batch-and-blast problem by letting marketers…
Close leads on user satisfaction with a 4.9-star rating across 573 reviews.
Close vs Postmark vs SMTP vs Campaigner — at a glance
| Feature | Close | Postmark | SMTP | Campaigner |
|---|---|---|---|---|
| Rating | 4.9 / 5 | 4.5 / 5 | 4.3 / 5 | 5.0 / 5 |
| Reviews | 573 | 25 | 11 | 2 |
| Starting price | $9 /user/month | Contact for pricing | Contact for pricing | $14 /month |
| Free trial | Yes | Yes | No | Yes |
| Free version | No | No | No | No |
| Best for | Individuals, Freelancers / Consultants, Medium Business | Individuals, Freelancers / Consultants, Medium Business | Individuals, Freelancers / Consultants, Large Enterprises | Large Enterprises, Medium Business, Small Business |
| Category | CRM Software | Transactional Email Software | Transactional Email Software | Email Marketing Software |
| Integrations | 1+ apps | — | — | 7+ apps |
| Platforms | SaaS/Web/Cloud, Mobile - Android, Mobile - iOS | SaaS/Web/Cloud, Mobile - iOS | 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 | SOC 2, HIPAA, GDPR | — | GDPR |
| Data residency | US | Global | US | US |
Key differences between Close and Postmark
- Pricing: Close starts at $9 /user/month. Postmark pricing is not publicly listed.
- User satisfaction: Close scores higher with a 4.9-star average.
- Deployment: Close supports SaaS/Web/Cloud, Mobile - Android, Mobile - iOS; Postmark supports SaaS/Web/Cloud, Mobile - iOS.
Compare Close vs Postmark vs SMTP 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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Close, Postmark, SMTP vs Campaigner: Biggest differences
Start here before you go deeper into features.
Individuals, Freelancers / Consultants, Medium Business
Best for reliable transactional email delivery with easy integration and strong support.
- You need guaranteed high deliverability for transactional emails.
- Your team values quick setup via official PHP and WordPress integrations.
- You want responsive customer support to resolve email issues promptly.
- You require extensive email marketing automation features beyond transactional emails.
- You have a tight budget and need a lower-cost email solution.
Individuals, Freelancers / Consultants, Large Enterprises
Large Enterprises, Medium Business, Small Business
Close typically suits Individuals and Freelancers / Consultants. Postmark 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 is a sales engagement CRM built for SMBs that lets teams email, call, and text leads directly from the platform without additional add-ons. It includes Sequences, task reminders, and ... Read More about Close | Postmark is the transactional email software service that fixes your deliverability, increases engagement, and manages spam complaints. It works with any email service provider or hosted ... Read More about Postmark | 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 | Campaigner is an email marketing and automation platform used by mid-size marketing teams that need behavior-triggered campaigns across email and other channels. It solves the ... Read More about Campaigner |
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SpotScoreWhat's this? ↗ | 8.6/10 | 8.8/10 | 7.2/10 | 8.8/10 |
User RatingsBased on verified Spotsaas reviews | ||||
Best Company Size | 5–100 employees | Small BusinessMedium Business | 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 gives complete team visibility on lead activities, and the built-in call coaching lets sales leaders mentor and improve team performance directly within the platform.
No key benefits available yet.
- 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.
- Email Marketing Automation: With Campaigner, managers can easily automate their email campaigns, saving time while keeping all customers engaged. This lets you focus on strategy while our platform handles the routine tasks.
- Advanced Segmentation Capabilities: Administrators will appreciate the powerful segmentation tools that let you create highly targeted messaging. This keeps your emails relevant to specific audience segments, ultimately driving higher engagement rates and conversions.
- Analytics and Reporting: Executives benefit from Campaigner's complete analytics dashboard, which provides actionable insights into campaign performance. You can easily track open rates, click-through rates, and ROI to make informed decisions.
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
No best-fit guidance available yet.
- 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
- 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.
No alternatives guidance available yet.
- 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.
- Pricing starts at $20/month for basic plans; teams under 10 people often switch to Mailchimp or ConvertKit for lower entry costs
- Interface requires 3–4 clicks for common tasks like segmentation; competitors like ActiveCampaign complete the same workflows in 1–2 clicks
- Automation limited to 5 conditional branches per workflow; teams needing 10+ branches migrate to HubSpot or Klaviyo
Software Demo
Demo |  Postmark has not given any software demo yet If you're the owner of this profile, add your demo.Contact us |
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How do Close, Postmark, SMTP and Campaigner Compare on Features?
Total Features | 15 Features | 23 Features | 5 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, Postmark, SMTP 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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Close, Postmark, SMTP vs Campaigner: Other Details
Organization Types supported |
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Get help choosing | Get help choosing |
Close, Postmark, SMTP vs Campaigner Security & Compliance
Certifications, data handling, and security controls for IT and compliance evaluators.
SOC 2 | ✓ Yes | ✓ Yes |
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HIPAA | ✗ No | ✓ Yes |
GDPR | ✓ Yes | ✓ Yes |
ISO 27001 | ✗ No | ✗ No |
Single Sign-On (SSO) | ✓ Yes | ✓ Yes |
Multi-Factor Auth (MFA) | ✓ Yes | ✓ Yes |
Data Encryption | ✓ Yes | ✓ Yes |
Audit Logs | ✓ Yes | ✓ Yes |
Data Residency | 🇺🇸 US | 🌐 Global |
Close vs Postmark vs SMTP User Reviews & Rating Comparison
User Ratings | ||||
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Rating Distribution | ||||
Spotsaas Editor’s POV generated by AI | Buyer sentiment Buyer sentiment is very strong across 639 reviews, with consistently positive feedback. What buyers like
Common complaints
| Buyer sentiment Users generally praise Postmark for its reliable email delivery, excellent support, and ease of integration, though some find pricing and feature complexity challenging. What buyers like
Common complaints
| Buyer sentiment Buyer sentiment is positive across 11 reviews, with strong overall satisfaction. What buyers like
Common complaints
| Buyer sentiment Buyer sentiment is very strong across 2 reviews, with consistently positive feedback. 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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Close, Postmark, SMTP and Campaigner 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 |  8 Screenshots |
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Videos |  1 Videos | No videos available. |
Alternatives to Close, Postmark, SMTP, Campaigner
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, Close or Postmark?
- Close edges out the other on user ratings (4.9 vs 4.5). That said, the best pick depends on your use case, so use the comparison tables above to evaluate each dimension.
- Do Close and Postmark offer a free trial?
- Yes, both Close and Postmark offer a free trial.
- What is the starting price of Close vs Postmark?
- Close starts at $9 /user/month. Postmark starts at Contact for pricing.
- What are the top alternatives to Close?
- Top alternatives to Close include Bigin by Zoho CRM, Creatio CRM, Telenotes CRM, Tapdesk, SpinOffice CRM.
- What are the top alternatives to Postmark?
- Top alternatives to Postmark include SMTP, Campaigner, Moosend, Mailgun, SparkPost.