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What is InboxStack?

InboxStack represents a cutting-edge solution in the realm of email deliverability intelligence, primarily powered by its distinctive causal AI engine known as Brain, which delves into the fundamental factors causing emails to not arrive in the inbox, rather than simply reporting failures. In contrast to conventional deliverability tools that primarily track surface-level issues, such as declining inbox placement rates or entries on blocklists, InboxStack adopts a more profound methodology by evaluating signals from diverse sources, including your email service provider, DNS authentication records like SPF, DKIM, and DMARC, Google Postmaster Tools, Microsoft SNDS, and an extensive array of over 50 blocklists, all analyzed through a detailed causal knowledge graph developed from two decades of specialization in email deliverability. This in-depth evaluation effectively identifies the true root causes of delivery challenges, whether they arise from DKIM misalignment, diminished IP reputation, or particular content triggers that may raise red flags. The onboarding experience is made efficient, requiring only the forwarding of your email headers to conduct an instant DNS/auth audit, eliminating the need for migration. For teams that wish to maintain ongoing oversight, there is an option to connect their ESP and Postmaster accounts, with the added feature of seed testing to gather reliable data on the differences between inbox placement and being marked as spam. Tailored for digital agencies and email service providers, InboxStack empowers users with the tools necessary to improve their email deliverability with both accuracy and assurance. Moreover, the platform's intuitive interface and rich support resources guarantee that teams can easily explore and take advantage of the extensive features it has to offer, fostering greater engagement and better email performance. This commitment to user experience is a testament to InboxStack's dedication to enhancing email communication strategies for its clients.

What is Email on Acid?

Our efficient three-step method seamlessly fits into your existing production workflow, allowing you to conserve time, increase value, and connect with a wider array of subscribers. Enjoy the simplicity of sending perfect emails with just one click—no HTML knowledge required! We offer customized click-to-fix features that address your team's specific requirements, such as UTM validation, accessibility checks for ADA compliance, and the capability to validate and modify the initial frame of animated GIFs specifically for Outlook. It is essential to keep in mind that if your subscribers do not receive your campaigns, they cannot interact with them. Enhance your email deliverability to guarantee that your messages reach more inboxes by employing blocklist domain and spam tests. You can evaluate your emails against 23 popular spam filters and check the status of your IP address with major blocklist services, helping you tackle any deliverability issues before you click “send.” Since each inbox displays emails differently, we provide previews across over 90 different clients and devices, ensuring your content is shown as intended in every inbox while also improving your overall email effectiveness. Additionally, our platform empowers you to track engagement metrics, enabling continuous optimization of your email strategies for even better results.

Media

No images available

Media

Integrations Supported

Gmail
Microsoft Outlook
Yahoo! Mail

Integrations Supported

emfluence Marketing Platform
iPost

API Availability

API Availability

Pricing Information

$49/month
Free Trial Offered?

Pricing Information

$86 per month
Or $73 per month if billed annually
Free Trial Offered?

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Standard Support
Web-Based Support

Customer Service / Support

Standard Support
Web-Based Support

Training Options

Documentation Hub
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training

Company Facts

Organization Name

InboxStack

Date Founded

2025

Company Location

India

Company Website

inboxstack.com

Company Facts

Organization Name

Sinch

Date Founded

2008

Company Location

Sweden

Company Website

www.emailonacid.com

Categories and Features

Email Deliverability

Not specified

Categories and Features

Email Deliverability

Not specified

Email Template Design

Not specified

Email Testing

Not specified

Email Tracking

Campaign Management
Location Tracking

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