Compare Slack vs. INinbox

Getting the appropriate Communications Software product is as straightforward as contrasting the good and weaker characteristics and terms offered by Slack and INinbox. Here it's also possible to match their general scores: 9.3 for Slack vs. 8.0 for INinbox. Or you can look at their general user satisfaction rating, 96% for Slack vs. 100% for INinbox. We suggest that you take some time to analyze their specific functions and decide which one is the better option for your business. Moreover. remember to take into account your company’s or industry’s unique case, such as, a multilingual solution for a global company or a mobile platform to help you work on the go. Our experts made sure to prepare reviews of all popular Communications Software services available on the market, but among them these three deserved our special attention: Slack, RingCentral, Wrike.





Slack screenshot INinbox screenshot
Pricing Page

Total Score

Our Score

9.3 ?

Our Score

8.0 ?

Client Satisfaction

Client Satisfaction

Client Satisfaction

96% ?

Client Satisfaction

100% ?





Pricing Type

Pricing Type

Free | Monthly payment | Annual Subscription Monthly payment
Full Review

Full Review

General Info

General Info

Slack is a messaging app that brings all your communication together in one place. It offers real-time messaging, archiving and search for modern teams.
INinbox makes email marketing easy for users with affordable and user-friendly email marketing solutions.
Useful Links
Contact No.

Contact No.

+1-415-805-8989 +1 315 217 4268
Company's Address

Company's Address

680 Folsom St #145
San Francisco, CA 94107
Erasmuslaan 16
9752PG Haren
The Netherlands
Pricing Page

Pricing Page

Learn more about Slack pricing Learn more about INinbox pricing
Types of Clients

Types of Clients

Small Business | Large Enterprises | Medium Business | Freelancers Small Business | Large Enterprises | Medium Business | Freelancers
Languages Supported

Languages Supported

English English, China, Germany, India, Japan
Pricing Info

Pricing Info

Slack offers three SMB and enterprise pricing packages for users to choose from. Give the details a look, and select your plan:

Free – No limits on time or users

  • Searchable message archives, up to 10k of your team’s most recent messages
  • 10 apps or service integrations
  • Native apps for iOS, Android, Mac & Windows Desktop
  • Two-person voice and video calls
  • 5GB total file storage for the team
  • Two-factor authentication

Standard – $6.67 per user/month billed annually ($8 billed monthly)

  • All features from the Free plan
  • Unlimited searchable message archives
  • Unlimited apps and service integrations
  • Custom retention policies for messages and files
  • Guest access
  • Priority support
  • OAuth via Google
  • Mandatory two-factor authentication
  • Custom User Groups to reach a team or department
  • Group voice and video calls
  • 10GB file storage per team member

Plus – $12.50 per user/month billed annually ($15 billed monthly)

  • All features from the Standard plan
  • SAML-based single sign-on (SSO)
  • Compliance Exports of all messages
  • 99.99% Guaranteed Uptime SLA
  • 24/7 Support with 4-hour response time
  • User provisioning and deprovisioning
  • Real-time Active Directory sync with OneLogin, Okta, Centrify, and Ping Identity
  • 20GB file storage per team member

Enterprise – By quote

  • Fully searchable archive with unlimited messages
  • Unlimited external integrations
  • Free native apps for iOS, Android & Mac Desktop
  • Detailed usage statistics, reporting & analysis
  • Custom message retention policies
  • Guest access
  • Priority support

INinbox offers two competitively priced packages and a quote-based packaging for businesses with huge email marketing needs. A free edition for users who want to check out the solution first before making an investment.

Free Box

  • 2,000 contacts
  • 20,000 emails

Big Box – from $20/month

  • up t0o 5,000 contacts
  • Unlimited emails

Sky Box – from $39/month

  • Unlimited Contacts
  • Unlimited emails

Unlimited Box – Custom pricing

  • Unlimited contacts
  • Unlimited emails
  • One Fixed price
Supported Integrations

Supported Integrations

Over 1,500 apps integrate with Slack. The complete list can be found at the Slack App Directory.

INinbox supports integrations with the following business systems and applications:

  • Magento
  • WordPress
  • Survey Monkey
  • Ongage
  • SEOShop
  • Opencart
  • Zapier
  • FreshBooks
  • Wufoo
  • Eventbrite
  • Formstack
  • Pipedrive
  • Recurly
  • Nutshell
  • Nimble
  • Insightly
  • Batchbook
  • Chargify
  • Stripe
  • PipelineDeals
  • ZenDesk
  • JotForm
  • Capsule
  • Highrise
  • Jimdo
  • JustUno
  • Padiact
  • Woobox
Email Address

Email Address
Customer Support

Customer Support




  • Conversation channels
  • Private groups
  • Messaging
  • Message history
  • Search
  • Snippets
  • Webhooks
  • Collaboration
  • File sharing
  • File browsing
  • Voice/video calls
  • Feedback
  • Progress archive
  • Notifications
  • Integrations
  • Synchronization
  • Open API
  • iOS & Android apps
  • Data security
  • Data encryption
  • Single Sign-On
  • Two-factor authentication


  • Broadcast Emails
  • One-click duplication
  • Built in Professional HTML templates
  • HTML Editor
  • Track Sent Emails
  • Conversion Tracking
  • Contact Management
  • Subscriber List Management
  • Make Filtered Lists
  • Add Gravatars
  • Message Personalization
  • Lead and Sales Conversation Tracking
OS Supported

OS Supported

Popular Clients

Popular Clients

Dow Jones, eBay, NBCUniversal, The Wall Street Journal
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Popular Alternatives

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If you are still having second thoughts about which service will be best in your case it might be a sensible idea to analyze each service’s social metrics. Such metrics are frequently an indicator of how popular every solution is and how large is its online presence.For instance, if you analyze Slack LinkedIn profile you’ll see that they are followed by 3065 users. In case of INinbox the amount of followers on their LinkedIn page is 33.