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    Overview
    ProductRatingMost Used ByProduct SummaryStarting Price

    Kamailio SIP Server

    Score9 out of 10
    N/AThe Kamailio SIP Server, formerly known as OpenSER or SER, is an open source VoIP and communications platform.N/A

    Zoom Phone

    Score9 out of 10
    N/ABuilt on Zoom's platform, Zoom's cloud phone consolidates business communication and collaboration into a single system. Available in 40+ countries, with expandable coverage through a bring-your-own-carrier offering, Zoom Phone supports inbound and outbound calling through the public switched telephone network (PSTN). Features: Post call summary & next steps A post-call summary from Zoom’s AI Companion keeps the focus on the conversation instead of…

    $10

    per month per user

    Pricing
    Kamailio SIP ServerZoom Phone
    Editions & Modules
    No answers on this topic
    US & Canada Metered
    $10
    per month per user
    US & Canada Unlimited
    $15
    per month per user
    Global Select
    $20
    per month per user
    Offerings
    Pricing Offerings
    Kamailio SIP ServerZoom Phone
    Free Trial
    NoNo
    Free/Freemium Version
    NoNo
    Premium Consulting/Integration Services
    NoNo
    Entry-level Setup FeeNo setup feeNo setup fee
    Additional Details—No fees for emergency 911 Service No fees for compliance and administrative cost recovery Fee No 10DLC SMS fees
    More Pricing Information
    Community Pulse
    Kamailio SIP ServerZoom Phone
    Considered Both Products
    Open Source
    No answer on this topic
    Zoom
    No answer on this topic
    Key User Insights
    Would buy again
    No answers on this topic
    100%
    Would buy again
    37 Answers
    Delivers good value for the price
    No answers on this topic
    100%
    Delivers good value for the price
    34 Answers
    Happy with the feature set
    No answers on this topic
    100%
    Happy with the feature set
    37 Answers
    Lived up to sales and marketing promises
    No answers on this topic
    94%
    Lived up to sales and marketing promises
    30 Answers
    Implementation went as expected
    No answers on this topic
    97%
    Implementation went as expected
    34 Answers
    Features
    Kamailio SIP ServerZoom Phone
    Cloud PBX
    Comparison of Cloud PBX features of Kamailio SIP Server and Zoom Phone
    Feature
    Kamailio SIP Server
    8.0
    1 Ratings
    0% above category average
    Zoom Phone
    9.5
    32 Ratings
    18% above category average
    Hosted PBX8.01 Ratings10.014 Ratings
    Multi-level Interactive Voice Response (IVR)9.01 Ratings9.619 Ratings
    User templates7.01 Ratings9.316 Ratings
    Call reports8.01 Ratings9.420 Ratings
    Directory of employee names8.01 Ratings9.328 Ratings
    Call Management
    Comparison of Call Management features of Kamailio SIP Server and Zoom Phone
    Feature
    Kamailio SIP Server
    8.4
    1 Ratings
    0% above category average
    Zoom Phone
    9.2
    33 Ratings
    9% above category average
    Answering rules9.01 Ratings9.830 Ratings
    Call recording8.01 Ratings9.931 Ratings
    Call park9.01 Ratings9.924 Ratings
    Call screening8.01 Ratings9.923 Ratings
    Message alerts8.01 Ratings9.728 Ratings
    VoIP system collaboration
    Comparison of VoIP system collaboration features of Kamailio SIP Server and Zoom Phone
    Feature
    Kamailio SIP Server
    7.5
    1 Ratings
    6% below category average
    Zoom Phone
    9.6
    21 Ratings
    19% above category average
    Video conferencing7.01 Ratings9.520 Ratings
    Audio conferencing8.01 Ratings9.520 Ratings
    Video screen sharing7.01 Ratings9.720 Ratings
    Instant messaging8.01 Ratings9.717 Ratings
    Mobile apps
    Comparison of Mobile apps features of Kamailio SIP Server and Zoom Phone
    Feature
    Kamailio SIP Server
    -
    Ratings
    Zoom Phone
    9.9
    32 Ratings
    22% above category average
    Mobile app for iOS00 Ratings9.928 Ratings
    Mobile app for Android00 Ratings9.922 Ratings
    Best Alternatives
    Kamailio SIP ServerZoom Phone
    Small Businesses
    Zoom Phone
    Score9 out of 10
    Nextiva
    Score8.1 out of 10
    Medium-sized Companies
    Cisco Unified Communications Manager (Call Manager)
    Score8.6 out of 10
    Cisco Unified Communications Manager (Call Manager)
    Score8.6 out of 10
    Enterprises
    Google Voice
    Score7.8 out of 10
    Google Voice
    Score7.8 out of 10
    All AlternativesView all alternativesView all alternatives
    User Ratings
    Kamailio SIP ServerZoom Phone
    Likelihood to Recommend
    9.0
    (1 ratings)
    9.4
    (35 ratings)
    Likelihood to Renew
    -
    (0 ratings)
    10.0
    (1 ratings)
    Usability
    -
    (0 ratings)
    8.0
    (1 ratings)
    Support Rating
    -
    (0 ratings)
    6.6
    (4 ratings)
    User Testimonials
    Kamailio SIP ServerZoom Phone
    Likelihood to Recommend
    Open Source
    Kamailio SIP Server is very well suited if you want to secure your main servers; it can perfectly act as a proxy server and a gateway to your main server. It also does load balancing and call transfers easily based on the configurations done.
    Incentivized
    Read full review
    Zoom
    I think it works well for offices that have multiple locations. Being able to give each person and office their own extension makes it easier for colleagues to connect with each other, plus it's a costs savings for each of the offices
    Incentivized
    Read full review
    Pros
    Open Source
    • Proxy server.
    • Security Firewall.
    • SIP to PSTN gateway.
    Incentivized
    Read full review
    Zoom
    • Having our Phone system all in onc place. Call, Text, Voicemail. with live transcript
    • Zoom Meeting AI companion - taking notes, creating action items, and summarizing the meetings then email immediately afterwards
    • Scheduler - being able to send links to team members or vendors to book a time that works best for them that is linked and synced to my calendar.
    Incentivized
    Read full review
    Cons
    Open Source
    • Interportability
    • SIP conversions.
    Incentivized
    Read full review
    Zoom
    • We needed to link each of our team members' personal emails to the Zoom account so we have to filter VM notifications out of our personal accounts.
    • It'd be nice if you could set business hours through the webpage to include a lunch break so that you don't have to manually go in to edit.
    Incentivized
    Read full review
    Likelihood to Renew
    Open Source
    No answers on this topic
    Zoom
    Integrated into our network. System wide access. Staff are comfortable with the product
    Incentivized
    Read full review
    Usability
    Open Source
    No answers on this topic
    Zoom
    Zoom Phone has a very sleek design which makes it very easy to operate and use both in the setting up of and interacting in a meeting space. That being said, certain features can seem a bit crowded while trying to screen share or display video which somewhat defeats the purpose of the application as compared to a standard conference call.
    Incentivized
    Read full review
    Support Rating
    Open Source
    No answers on this topic
    Zoom
    I haven't had any sort of issues with Zoom as of yet to have to call Support. That right there makes me think it's a good product. Simple and easy to use. Nothing confusing or glitchy that would make me have to get in touch with them. Straightforward so I'm not trying to figure out a specific workflow.
    Incentivized
    Read full review
    Alternatives Considered
    Open Source
    As Kamailio SIP Server is an open source, the major impact is on cost; it's free to use compared to any other Softswitch or server in the market. You can also customize it to your need and use the features that you need, which is one of the major plus points for the Kamailio SIP Server. And one server is enough to handle thousands of calls simultaneously.
    Incentivized
    Read full review
    Zoom
    The main reason why we switched to Zoom Phone is because our VOIP system inexplicably went down for almost a month and no one could figure out what was wrong. Lumen was charging way more than Zoom Workplace, but could not get the system to work.
    Incentivized
    Read full review
    Return on Investment
    Open Source
    • As its open source ROI is excellent.
    Incentivized
    Read full review
    Zoom
    • Calls actually come through, resulting in our users trusting our phone system again
    • Improved internal communication
    • Users can be reached anywhere, so they do not have to stay at their desk to wait for important calls
    • Voicemail is processed faster because it is translated to text
    Incentivized
    Read full review
    ScreenShots

    Zoom Phone Screenshots

    Screenshot of the Zoom AI for business phone communications, available at no additional costScreenshot of Zoom's integrated workflowsScreenshot of the Call Handling Panel