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Digium Asterisk vs ShoreTel Sky [EOL] comparison

Digium and Mitel are both solutions in the Unified Communications category. Additionally, 75% of Digium users are willing to recommend the solution, compared to 80% of Mitel users who would recommend it.
Digium Asterisk
Read 5 Digium Asterisk reviews
  • 599 Views
  • 491 Comparison Views
75% willing to recommend
ShoreTel Sky [EOL]
Read 7 ShoreTel Sky [EOL] reviews
    80% willing to recommend
     

    Comparison Buyer's Guide

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    Executive Summary
    We performed a comparison between Digium Asterisk and ShoreTel Sky [EOL] based on real PeerSpot user reviews.

    Find out what your peers are saying about Cisco, 3CX, Digium and others in Unified Communications.

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    To learn more, read our detailed Unified Communications Report (Updated: March 2026).
    Buyer's Guide
    Unified Communications
    March 2026
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    Helped 884,873 peers since 2012

    Review summaries and opinions

    We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
     

    Categories and Ranking

    Digium Asterisk
    Average Rating
    8.0
    Number of Reviews
    5
    Ranking in other categories
    Unified Communications (3rd), IP Telephony & Unified Communications (2nd)
    ShoreTel Sky [EOL]
    Average Rating
    7.8
    Reviews Sentiment
    4.5
    Number of Reviews
    7
    Ranking in other categories
    No ranking in other categories
     

    Featured Reviews

    AK
    Amjad-Khan
    Technical Lead at a marketing services firm with 11-50 employees
    Call recording, call logging, and the stability are pivotal features for our clients
    We mainly replace old telephony equipment. If, for instance, there is an old Alcatel telephone system (digital or analog), and the customer asks us for a new option for IP telephony, then we offer both the Cisco- and Asterisk-based systems. We know the billing, we know the pricing of the items and what we can offer with both solutions. There are multiple factors involved when selecting a vendor * stability * support * features. If the product is stable, the product has good support, and it has enough features which we can offer to our clients, then the product is under our consideration.
    Read full review
    it_user269988 - PeerSpot reviewer
    it_user269988
    Office Manager with 51-200 employees
    The Service Portal is useful feature, but there are occasional outages.
    Phone Assistant is very useful, as is the Service Portal Occasional outages, but they're usually resolved very quickly. Customer Service: Customer service is generally responsive and courteous. Technical Support: Technical support folks are generally knowledgeable and helpful. We moved to VoIP…
    Read full review

    Quotes from Members

    We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
     

    Pros

    "With the passage of time I am sure that these cons will be solved, particularly because it has added a lot savings for communication needs."
    "Best Telecommunication solution in the world."
    "The most valuable features are call recording, call logging, and the stability."
    "Highly customizable for customer needs"
    "With the reporting available from Shoretel we were able to adjust our staff scheduling and decrease average hold times from 60 seconds to 30 seconds."
    "We have 15 branches that are now connected as though we are housed in the same building."
    "The Portal administrator tool is very easy to navigate and understand; this has to be my favorite feature."
    "Using Shortel sky has been great for our company."
    "We moved to VoIP a little over five years ago, after having a traditional POTS system, and it was a great improvement in terms of capability and service."
    "Allows us to work interactively through different locations."
     

    Cons

    "The asterisk VoIP has a delay of about 400 milliseconds."
    "Difficult to configure and maintain."
    "CTI, computer telephony integration, is a necessary component. It must be a part of the basic code. Currently, we need to use external connectors for call centers."
    "The portal is very good, but could use more function and streamline, especially in the call flow section."
    "Occasional outages, but they're usually resolved very quickly."
    "Some intermittent connectivity issues are inherent with VOIP systems."
    "The experience does not feel "Unified." With the recent acquisition of M5 they acquired a bunch of new features, but have not been able to make all UC features available from one website or one program."
     

    Pricing and Cost Advice

    "If the client requires an economical solution with many features, we can offer them Digium Asterisk, where there is no licensing. It is a good, economical solution."
    Information not available
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    884,873 professionals have used our research since 2012.
     

    Top Industries

    By visitors reading reviews
    Healthcare Company
    10%
    Educational Organization
    10%
    Manufacturing Company
    8%
    Outsourcing Company
    8%
    No data available
     

    Company Size

    By reviewers
    Large Enterprise
    Midsize Enterprise
    Small Business
    No data available
    By reviewers
    Company SizeCount
    Small Business6
    Large Enterprise1
     

    Comparisons

    Kamailio SIP Server vs Digium Asterisk Logo
    Kamailio SIP Server vs Digium Asterisk
    Compared 15% of the time
    Cisco Unified Communications vs Digium Asterisk Logo
    Cisco Unified Communications vs Digium Asterisk
    Compared 12% of the time
    Fortinet FortiVoice vs Digium Asterisk Logo
    Fortinet FortiVoice vs Digium Asterisk
    Compared 12% of the time
    Alcatel-Lucent OmniPCX Enterprise Communication Server vs Digium Asterisk Logo
    Alcatel-Lucent OmniPCX Enterprise Communication Server vs Digium Asterisk
    Compared 12% of the time
    Digium Switchvox vs Digium Asterisk Logo
    Digium Switchvox vs Digium Asterisk
    Compared 10% of the time
    More Digium Asterisk Competitors
    Vertical Solutions Wave IP vs ShoreTel Sky [EOL] Logo
    Vertical Solutions Wave IP vs ShoreTel Sky [EOL]
    Compared 49% of the time
    More ShoreTel Sky [EOL] Competitors
     

    Product Reports

    Buyer's Guide
    Unified Communications
    March 2026
    Digium Asterisk reportDownload Digium Asterisk product report
    Buyer's Guide
    Unified Communications
    March 2026
    ShoreTel Sky [EOL] reportDownload ShoreTel Sky [EOL] product report
     

    Also Known As

    Asterisk
    No data available
     

    Overview

    Open source PBX system providing a complete telecommunications platform.
    Digium

    ShoreTel Sky have some useful features: ShoreTel Sky Communicator turns conference calls into active web sharing with video, presentation mode and more. ShoreTel Sky Mobility keeps you connected with deskphone features and functionality everywhere. ShoreTel Sky Advanced Application integrations amplify and enhance CRM and ERP functionality and ShoreTel Sky Contact Center improves the quality and quantity of profitable customer contacts.

    Mitel
     

    Sample Customers

    Yahoo, Penn Univeristy of Pennsylvania, US Army, Google, eBay
    Abacus Service Corporation, AIPAC, Airlie Womens Clinic, All Erection Crane And Rental Corporation, Aquent, Aspire, Bonobos, Brooklyn Brewery, Cable Scope, Caduceus
    Buyer's Guide
    Unified Communications
    March 2026
    Download Free Report
    Find out what your peers are saying about Cisco, 3CX, Digium and others in Unified Communications. Updated: March 2026.
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    We monitor all Unified Communications reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.