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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

    Telnyx

    Score5 out of 10
    N/AOffering a communications platform that provides global carrier-grade services, Telnyx in Chicago maintains an international, private IP network and grants its customers control over their communications through its portal and RESTful API. Telnyx products include voice (elastic SIP trunking, global number search, and telephony data), programmatic messaging, wireless (mobile IoT), embedded communications (WebRTC) and automated networking. Customers provision services a la carte and pay by usage…

    $2

    per month

    Pricing
    Kamailio SIP ServerTelnyx
    Editions & Modules
    No answers on this topic
    Identity Services & Data
    $0.0015
    per LRN lookup
    Voice API
    $0.002
    per minute
    SMS API
    $0.0025
    per send (free to receive)
    Elastic SIP Trunking
    $0.0035 ($0.005)
    origination (termination) per minute
    Fax
    $0.0070
    per page
    Verify API
    $0.04
    per API call
    Wireless
    $2.00
    per month
    Networking
    $100.00
    per month (starting price)
    Offerings
    Pricing Offerings
    Kamailio SIP ServerTelnyx
    Free Trial
    NoYes
    Free/Freemium Version
    NoNo
    Premium Consulting/Integration Services
    NoNo
    Entry-level Setup FeeNo setup feeNo setup fee
    Additional DetailsTelnyx offers additional discounts as customers scale.
    More Pricing Information
    Community Pulse
    Kamailio SIP ServerTelnyx
    Considered Both Products
    Open Source
    No answer on this topic
    Telnyx
    No answer on this topic
    Key User Insights
    Would buy again
    No answers on this topic
    88%
    Would buy again
    7 Answers
    Delivers good value for the price
    No answers on this topic
    100%
    Delivers good value for the price
    8 Answers
    Happy with the feature set
    No answers on this topic
    100%
    Happy with the feature set
    8 Answers
    Lived up to sales and marketing promises
    No answers on this topic
    80%
    Lived up to sales and marketing promises
    4 Answers
    Implementation went as expected
    No answers on this topic
    83%
    Implementation went as expected
    5 Answers
    Features
    Kamailio SIP ServerTelnyx
    Cloud PBX
    Comparison of Cloud PBX features of Kamailio SIP Server and Telnyx
    Feature
    Kamailio SIP Server
    8.0
    1 Ratings
    1% above category average
    Telnyx
    -
    Ratings
    Hosted PBX8.01 Ratings00 Ratings
    Multi-level Interactive Voice Response (IVR)9.01 Ratings00 Ratings
    User templates7.01 Ratings00 Ratings
    Call reports8.01 Ratings00 Ratings
    Directory of employee names8.01 Ratings00 Ratings
    Call Management
    Comparison of Call Management features of Kamailio SIP Server and Telnyx
    Feature
    Kamailio SIP Server
    8.4
    1 Ratings
    2% above category average
    Telnyx
    -
    Ratings
    Answering rules9.01 Ratings00 Ratings
    Call recording8.01 Ratings00 Ratings
    Call park9.01 Ratings00 Ratings
    Call screening8.01 Ratings00 Ratings
    Message alerts8.01 Ratings00 Ratings
    VoIP system collaboration
    Comparison of VoIP system collaboration features of Kamailio SIP Server and Telnyx
    Feature
    Kamailio SIP Server
    7.5
    1 Ratings
    6% below category average
    Telnyx
    -
    Ratings
    Video conferencing7.01 Ratings00 Ratings
    Audio conferencing8.01 Ratings00 Ratings
    Video screen sharing7.01 Ratings00 Ratings
    Instant messaging8.01 Ratings00 Ratings
    Best Alternatives
    Kamailio SIP ServerTelnyx
    Small Businesses
    CallFire
    Score9.7 out of 10
    Telegram
    Score9 out of 10
    Medium-sized Companies
    Fuze
    Score8.2 out of 10
    Telegram
    Score9 out of 10
    Enterprises
    Cisco Unified Communications Manager (Call Manager)
    Score8.3 out of 10
    Telegram
    Score9 out of 10
    All AlternativesView all alternativesView all alternatives
    User Ratings
    Kamailio SIP ServerTelnyx
    Likelihood to Recommend
    9.0
    (1 ratings)
    5.0
    (8 ratings)
    Usability
    -
    (0 ratings)
    5.0
    (1 ratings)
    Support Rating
    -
    (0 ratings)
    5.0
    (1 ratings)
    User Testimonials
    Kamailio SIP ServerTelnyx
    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
    Telnyx
    Telnyx is well suited for general phone number provisioning as they have a large pool to choose from. There is certainly room to grow with fax troubleshooting.
    Incentivized
    Read full review
    Pros
    Open Source
    • Proxy server.
    • Security Firewall.
    • SIP to PSTN gateway.
    Incentivized
    Read full review
    Telnyx
    • Price Matters for the flourishing organization like us. Telnyx [is] affordable to us.
    • Telnyx is very generous in terms of providing regular updates through webinar , free credits, real time support . One most important is that they are not in hurry of closing the account because of minus balance.
    • Telnyx Portal is pretty easy to navigate and manage the customized settings.
    • Among other giant SIP providers I found Telnyx with very modern and humble customer approach.
    Read full review
    Cons
    Open Source
    • Interportability
    • SIP conversions.
    Incentivized
    Read full review
    Telnyx
    • Number testing: Currently I need to call our fax numbers manually to confirm fax tones. It would be useful to test numbers in bulk from the portal.
    • Troubleshooting: Currently, samples are needed for each fax transmission when there are issues. And those samples need to be within 24-48 hours. It would be useful if Telnyx could do a health check out proactively to gather information on high failure counts prior to customer reports.
    • Transparency with system issues: We've run into scenarios where we wanted information on system-wide fax failures, but when the issues were resolved we didn't get root cause analysis.
    Incentivized
    Read full review
    Usability
    Open Source
    No answers on this topic
    Telnyx
    They utilize a private IP network back end that makes SIP configuration for inter-carrier operation difficult because they assume that projecting their private network outside is ok.
    Read full review
    Support Rating
    Open Source
    No answers on this topic
    Telnyx
    They are providing services using a Freeswitch system behind a NAT router and they expect carriers to deal with their NAT network. Their support team does not seem to understand that problems caused by exposing a NAT switch to the Internet at large.
    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
    Telnyx
    Easy of use and better prices. Outstanding customer service. Variety of services in telecommunication needs. Easy use of interface even for not experienced users. Migration of SIP numbers is easier. Reporting is very easy to use and customizable for our specific needs, so we can keep track of costs in an easy way
    Incentivized
    Read full review
    Return on Investment
    Open Source
    • As its open source ROI is excellent.
    Incentivized
    Read full review
    Telnyx
    • Due to easy SIP truncation the cost of customer approach has become very convenient internationally. We got a so much scaling to play on large customer base. And large base makes sense of large positive ROI.
    Read full review
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