INBOX vs. SMTP.com Comparison


INBOX Useinbox	SMTP.com Ziff Davis	+	+
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Read our ROI report for methodology 17,400 Ratings Visit Website GetResponse GetResponse is a lifecycle automation platform for businesses that want to drive more consistent, repeatable revenue across the entire customer journey. We help you move customers from first touch to first purchase, repeat purchase, and reactivation - using email, SMS, push notifications, and lifecycle automation across every stage of the customer journey With built-in deliverability, behavioral triggers, and deep integrations, you can launch faster, reduce manual work, and turn your lifecycle into a predictable revenue system. No disconnected tools. No campaign chaos. Just one system designed to move customers forward. 1,801 Ratings Visit Website InboxAlly InboxAlly is an email deliverability platform for senders whose messages are landing in spam or promotions instead of the primary inbox. It repairs and protects sender reputation at the domain and IP level, warms up new domains and IPs on an adaptive schedule, and shows where messages actually land through inbox placement testing across Gmail, Outlook, Yahoo and other major mailbox providers. Live blacklist monitoring and deliverability alerts surface problems as they develop rather than after a campaign underperforms, and an ML-modeled sender score makes reputation measurable week to week. InboxAlly runs alongside the stack you already have. It works with any ESP, SMTP service or custom sending infrastructure - including Mailchimp, SendGrid, Amazon SES, Brevo, Klaviyo, HubSpot and Instantly - with no migration and no change to how you send, and without handing over your sending credentials. A REST API and native integrations support programmatic setup, and separate sender profiles let agencies and multi-brand senders manage many domains side by side. 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What you get: * Email and SMS campaigns from one contact spine * Journey Builder for abandoned cart, win-back, post-purchase, and promotional automations * Segmentation, acquisition forms, and landing pages * eRFM analytics and campaign revenue reporting * Deliverability controls: authentication, throttling, ISP feedback, and list hygiene * Integrations with third-party and Maropost-native apps Set it up once. Marketing Cloud takes it from there. 152 Ratings Visit Website Knak Knak is the no-code platform that empowers self-sufficient marketing teams to create beautiful, on-brand emails and landing pages — without relying on developers or agencies. Built for speed and collaboration, Knak streamlines campaign production with modular templates, real-time editing, simple collaboration, and seamless integrations with leading MAPs like Adobe Marketo Engage, Salesforce Marketing Cloud, Oracle Eloqua, and more. 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About Send & Analyze email marketing campaigns. Start your free plan with unlimited sending. Free for a lifetime! Send personalized, scripted, and effective email marketing campaigns! Use our developed infrastructure to get high inbox rates. Starting from a simple welcome message to a complex set of customer-loyalty-increasing applications, you can automate many programs. As it is easier now to create, apply, and track new campaigns, you can focus on analyzing the results and get better for the future campaigns. Gain valuable insight into each campaign that you send using interactive reports. Gain complete control over your campaigns with a quick and thorough overview of your campaigns’ progress. Track unique and total open rates, click-through rates, bounce rates, forwards, and unsubscribes, and hold all the aces with INBOX in email marketing.	About Reliable SMTP relay and email delivery services. Powerful email delivery services that enable you to send and track high volume emails effortlessly. Integrate and start sending in minutes. All your transactional, email relay and email delivery needs under one roof. Whether you need a low-latency email delivery provider for your transactional emails, scalable infrastructure for high-volume sends or reliable backend solution for your marketing campaigns, SMTP is built to deliver. Reputation Defender is SMTP’s proprietary technology that uses big data to proactively monitor your email list health and safeguard your domain and IP reputation among ISPs by suppressing bad emails in your sends from hard and soft bounces. This ensures your delivery rates and inbox placement incrementally gets better over time.
Platforms Supported Windows Not Supported Mac Not Supported Linux Not Supported Cloud Supported On-Premises Not Supported iPhone Not Supported iPad Not Supported Android Not Supported Chromebook Not Supported	Platforms Supported Windows Supported Mac Supported Linux Supported Cloud Supported On-Premises Not Supported iPhone Supported iPad Supported Android Supported Chromebook Supported
Audience Digital marketers interested in an email marketing, marketing automation, and transactional email service	Audience Companies that want to send high volumes of emails and improve deliverability
Support Phone Support Supported 24/7 Live Support Not Supported Online Supported	Support Phone Support Not Supported 24/7 Live Support Supported Online Supported
API Offers API Not Supported	API Offers API Supported
Screenshots and Videos View more images or videos	Screenshots and Videos View more images or videos
Pricing $5 per user per month Free Version Supported Free Trial Supported	Pricing $25 per month $25 for 50,000 emails / mo $80 for 100,000 emails / mo $300 for 500,000 emails / mo $500 for 1,000,000 emails / mo 24hr support with all plans! Free Version Not Supported Free Trial Not Supported
Reviews/Ratings Overall 1.0 / 5 ease 3.0 / 5 features 3.0 / 5 design 4.0 / 5 support 2.0 / 5 Read all reviews	Reviews/Ratings Overall 1.0 / 5 ease 1.0 / 5 features 1.0 / 5 design 1.0 / 5 support 1.0 / 5 Read all reviews
Pros & Cons from Real Users Pros It's not a fly by night company. The UI is clean with a short learning curve compared to most ESP. Their unique feature is multi-brand management, normally others let you manage only one brand per account. Cons The platform is really buggy, unstable and unreliable. Some features are still missing, like a/b testing, granular permissions(roles) for teammates, more languages, Tags, more direct integrations and cheaper Zapier alternatives, etc.	Pros & Cons from Real Users Pros None, the product worked to begin with but when it stopped working the support was dreadful and they locked us in. N/A. Cons The smtp service itself has intermittent failures that are reluctantly admitted after battering down the support door several times to find out why sites aren't sending emails. Worse still they have a plugin that was heartily sold to me as the Wordpress plugin when I started with them - this was supported gingerly at first, then, it still being on version 1 was entirely disowned by them - despite the plugin having all their branding and their site details and being published and distributed on the Wordpress platforms ... by them. They simply deny it now, having pushed me towards it and supporting it initially. Bad SMTP. Bad dashboard. Bad support. Bad price. Bad advantages. Bad everything.
Training Documentation Supported Webinars Not Supported Live Online Not Supported In Person Not Supported	Training Documentation Supported Webinars Supported Live Online Supported In Person Not Supported
Company Information Useinbox Founded: 2009 Turkey useinbox.com	Company Information Ziff Davis Founded: 1995 United States www.smtp.com
Alternatives Maileroo	Alternatives Cloudflare Email Service Cloudflare
SMTP.com Ziff Davis	Labnify
Brevo	Mailazy
SendPulse	turboSMTP
SendGrid Twilio SendGrid View All	Maileroo View All
Categories Email Marketing Supported Email Verification Supported Marketing Automation Supported Transactional Email Supported	Categories Email APIs Supported Email Deliverability Supported Email Verification Supported SMTP Supported Transactional Email Supported
Show More Features Email Marketing Features A/B Testing Supported Artificial Intelligence Not Supported Auto-Responders Supported CAN SPAM Compliance Supported Customer Surveys Supported Drip Campaigns Supported Dynamic Content Supported Event Triggered Email Supported Image Library Supported Landing Pages/Web Forms Supported Mailing List Management Supported Mobile Optimized Emails Supported Reporting/Analytics Supported Subscriber Management Supported Template Management Supported WYSIWYG Email Editor Supported	Email Verification Features Bulk Email Verification Supported Catch-all Server Detection Supported Disposable Email Detection Supported Domain Check Supported Mail Server Validation Supported Single Email Verification Supported Spam Trap Detection Supported Syntax Check Supported Transactional Email Features A/B Testing Supported Contact Database Supported Dynamic Content Supported Email Monitoring Supported Mailing List Management Supported Reporting/Analytics Supported Spam Check Supported Template Management Supported Show More Features Email Deliverability Features Deliverability Alerts Supported Deliverability Reporting Supported DMARC Analytics Supported Email Address Verification Supported Email Content Testing Supported Email Previewing Supported Inbox Placement Testing Supported IP Blacklist Monitoring Supported Reputation Reporting Supported
Integrations Gmail Supported Google Forms Supported Slack Supported Airtable Not Supported Axis LMS Not Supported Crelate Not Supported Gammadyne Mailer Not Supported Google Calendar Not Supported Google Contacts Supported Google Sheets Supported IntelliClick Not Supported KonnectzIT Supported MaxBulk Mailer Not Supported Montra Not Supported MyBasicCRM Supported Rambox Supported Shopify Not Supported Trello Not Supported WordPress Not Supported Zapier Supported Show More Integrations View All 10 Integrations	Integrations Gmail Supported Google Forms Supported Slack Supported Airtable Supported Axis LMS Supported Crelate Supported Gammadyne Mailer Supported Google Calendar Supported Google Contacts Not Supported Google Sheets Not Supported IntelliClick Supported KonnectzIT Not Supported MaxBulk Mailer Supported Montra Supported MyBasicCRM Not Supported Rambox Not Supported Shopify Supported Trello Supported WordPress Supported Zapier Not Supported Show More Integrations View All 17 Integrations
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