# Page 3 | SIP.US Reviews 2026. Verified Reviews, Pros & Cons | Capterra > Page 3 - Is SIP.US the right VoIP solution for you? Explore 85 verified user reviews from people in industries like yours to make a confident choice. Source: https://www.capterra.com/p/186600/SIP-US/reviews --- SIP.US 4.7 (85) [View alternatives](https://www.capterra.com/p/186600/SIP-US/alternatives/) Provider data verified by our Software Research team, and reviews moderated by our Reviews Verification team. [Learn more](https://www.capterra.com/our-story/) * * * Last updated March 13th, 2026 # Page 3 - Reviews of SIP.US ## Showing most helpful reviews Showing 51-75 of 85 Reviews Sort by: Most Helpful Rating Company Size Reviewer's Role Length of Use Frequency of Use MC Mark C. Owner Computer & Network Security Used the software for: 1-2 years ### "Great Service Replacement" June 4, 2019 5.0 The Techsupport is one of the best I’ve dealt with. Quick and very helpful. When issues arise, they almost always know the answers. Pros Easy setup and support. As a reseller, it’s a quick and easy sell due to the ease of operating it when in a bind. Cons Not much to add in here. I haven’t found another provider for the cost. Reason for choosing SIP.US The cost and ease of setup. Support has been very helpful as well, so that’s a plus. Review Source TS Troy S. Operations Director Oil & Energy Used the software for: 2+ years ### "SIP.US - Great service" May 25, 2022 5.0 Pros Easy to Use and setup. Good support when needed. Cons I have not experienced any cons at this point in time. Review Source FZ Fakhar Z. CEO Telecommunications Used the software for: 6-12 months ### "SIP.US Review" June 6, 2019 5.0 I'm working on my call center project from home and everything is going fine except the call rejection because of Capacity limit ended.... Pros The call quality and unlimited US (48) and Canada were the main things which pulled me towards SIP.US. Calls quality is the best, there's no interruption, distortion, breakout or noise in the background. Cons No, for my requirements everything is fine except when I see the message "Capacity limit reached.......". I think it should be enough everything on each channel and there should not be any limit for busy signals. Review Source BV Boris V. manager Health, Wellness and Fitness Used the software for: 2+ years ### "VOIP WOP review" June 19, 2019 4.0 This system eliminated wired telephones and central station. Pros It has clear sound for phone calls. Options can be aded or replaced from the Intenet login without involving SIP personnel. Cons Why can't we use this system for faxes? Review Source PD Pete D. President Computer & Network Security Used the software for: 2+ years ### "Sip folks you can talk to" June 4, 2019 4.0 Very good. Tech support was always helpful even when it wasn’t a sip.us issue. Pros You answer your phone for customers when they call Cons Nothing. They were supper helpful and always went out of the way to solve an issue. Review Source AJ Alex J. Office manager Sporting Goods Used the software for: 2+ years ### "Sip.us one of the best sip services I used" June 4, 2019 5.0 Cost-effective solution, never any major issue. Customer service is awesome. Pros Simple to use and reliable for any business. Cons Few Glitches from time to time but no major issue and we have been using this for 4 yesrs. Review Source MF Miles F. President Information Technology and Services Used the software for: 2+ years ### "Using SIP.US since they were founded -- solid utility service" June 12, 2019 5.0 Have used them for years and have been happy with the quality of service, support, at a reasonable price. Pros They have reasonable pricing; good support; and easy to use service Cons They have very basic features for SIP Trunking Review Source TD Tim D. Systems Administrator Electrical/Electronic Manufacturing Used the software for: Less than 6 months ### "Honest Salespeople Breed Happy Customers" May 16, 2018 5.0 If you have an opportunity to work with them, do so... He has made this an incredibly smooth experience, and the transition thus far has been flawless. The few times I've had a question, or needed assistance, the customer service people are on the ball, and respond with incredible speed, especially when compared to our previous SIP provider. Pros The best part so far, has been working with representatives. They are incredibly honest, friendly, and accommodating. The service is solid and of great quality, and I love being able to view and modify things like CNAM, E911, etc., right from the customer portal. Our previous SIP provider required that a ticket be opened with them, and then they would make the changes. Cons I haven't had any issues, thus far. My only wish would be to port things in even faster, to get off of our current SIP provider... but that's not due to any limitation with SIP.US. Review Source BB Brett B. Tech support volunteer Religious Institutions Used the software for: 2+ years ### "Simple and Easy" June 12, 2019 5.0 Pros Sip.us sip truck was easy to set up with my freepbx system. Customer service is also excellent with any questions. Cons I don't have any complaints about sip.us. Review Source VD Vince D. VP of Technology Information Services Used the software for: 2+ years ### "Simple and Reliable" June 4, 2019 5.0 Pros Simple to setup Easy to Maintain Very Reliable Service Very Responsive Customer Support Cons They had server issues a year or so ago, but was solved quickly Review Source KG Kurian G. IT Religious Institutions Used the software for: 2+ years ### "SIP" June 12, 2019 5.0 Pros Ease of connectivity with FreePbx, etc. Top quality over VOIP. Cons Liked Everything!! Pretty much took an hour or two setup the trunk. Review Source JZ Jeff Z. Network Engineer Retail Used the software for: 2+ years ### "overall good value" June 4, 2019 5.0 Pros flexibility, almost everything can be done on the website. Cons no 24/7 support; no live telephone tech support Review Source NP Nate P. Owner Retail Used the software for: 2+ years ### "Simple and Easy SIP Trunk" May 16, 2018 5.0 Pros The setup is dead simple. Started a free trial in 30 seconds. Was connected in less than 5 minutes testing the service. I had a couple of questions and support was fast with responses. Cons I haven't had any issues with the service and it has been exactly what I had expected to get when I signed up. Review Source VR Verified Reviewer Chief Of Technology Business Supplies and Equipment Used the software for: 2+ years ### "Great Service" June 12, 2019 5.0 Pros Easy to setup and great Support. Easy billing Cons No real Cons. I have been very satisfied. Review Source MA Mohamed A. CEO Outsourcing/Offshoring Used the software for: 1-2 years ### "One of the most cost effective products i have got to my company" June 12, 2019 5.0 Pros Best price in the market 24/7 Technical Support Variety of Packages and solutions Cons VOIP service works perfectly on the USA but some countries need some fixing when it comes to the VOIP voice quality Review Source IM Ian M. Network Engineer Research Used the software for: Less than 6 months ### "A solution with great potential if your vendor knows what he is doing." June 12, 2019 5.0 We were affected by the fires in Malibu, CA and tried to implement this as a backup option to our copper PRI line that burned up along Pacific Coast Highway. The issue that prevented us from using this as a solution was the vendor not configuring our device correctly so my review does not reflect the software itself or the potential it had to solve our problem. My lack of a great rating focuses on the difficulty it took to get tech support to work with us when we needed it and the lack of self-service options available online. Pros The ordering and setup process was easy. It was fast and easy to work with the Billing group to resolve cancellation and refund. Obviously not software related, but you'll notice how they want you to focus on only software related questions. Cons Tech Support was not easily available and in a couple cases took way too long to respond, costing us money with vendors sitting around waiting to connect our system to SIP. Also, equally as irritating, you can only pay by credit card and after your purchasing group has made the initial payment you can't change the option via your online account and everything seems to have to go through their customer service group. Review Source aeC abel ernesto C. IT Banking Used the software for: 2+ years ### "WEB PAGE" June 12, 2019 4.0 the option to manage it sip.us is to have a DRP of our company. that has served a lot, since other options were seen and did not meet the requirements for us. Pros the facility to be able to register telephone numbers, since it is important when any unforeseen happens and you have to do it urgently. Cons Some options on the website are confusing to handle, even for experts in the field. Review Source ET Edmundo T. GM Transportation/Trucking/Railroad Used the software for: 1-2 years ### "Solve our problems" June 12, 2019 5.0 Pros No more problems with our phone system, Cons None, everything was easy to install, no problems for our IT team Review Source MK Michael K. President Information Technology and Services Used the software for: Less than 6 months ### "Onboarding & Setup" May 24, 2022 3.0 Just not good and then a loss of service for over a week. Pros In the US, Free Trial, & Ease of Setup with Free Trial. Cons After onboarding more details were given about setup which were not provided during review or implementation of the free trial. After reviewing their FAQs and knowledge base, I reached out to support pertaining to the issues and they were very condescending instead of being empathic to issue and trying to provide assistance. Reason for choosing SIP.US US based, Free Trial which worked after basic setup. Review Source RO Robert O. I.T. Manager Rath North America Building Materials Used the software for: 1-2 years ### "Service" June 26, 2019 4.0 Fairly good. The Technicians and sales people gave me confidence in the process. Pros When setting up our system the Technical people at SIP.US worked with our Austrian Cisco Technician and we got both our North American Plants up and running ahead of schedule Cons I didn't know anything about SIP. I wish there had been a primer for the uneducated in this field available. Review Source CC Charles C. Owner Marketing and Advertising Used the software for: Less than 6 months ### "SIP.US is a really good value for money" May 25, 2022 5.0 My experience with SIP.US has been very good. We had one minor issue but their customer service was quick to resolve it beyond our expectations. Pros The thing that I like most about the software is that it was very easy to deploy. Cons So far I don't have any complaints. We have been using it for six months with no real issues. Review Source DS David S. Director of Operations Internet Used the software for: 6-12 months ### "Great SIP Trunk Lines for Asterisk" June 4, 2019 5.0 Pros Sip.us provides good quality SIP truck lines for my custom asterisk server. They seem to work well, and I don't have any complaints. Cons I don't have any complaints about my SIP trunk line as of yet. Review Source SH Sharon H. Accountant Accounting Used the software for: Less than 6 months ### "My experience with SIP.us" May 31, 2022 4.0 I had to leave as I cannot afford another glitch, to upset my customers Pros I liked it when it worked , it was great Cons When it when down for Four days straight. I was very upset as was my Customers. Reason for choosing SIP.US Price and expecting excellant service Review Source AV Alan V. IT Director Retail Used the software for: 2+ years ### "Great Product for our PBX" June 12, 2019 5.0 SIP.US has just been a rock-solid piece of our PBX that serves over 500 users. Pros Easy to use, very reliable as an add-on to our SIP Trunks Cons We had to do come custom configuration to get it to work with our PBX. But after that, no issues. Review Source pD parsana D. Administrator Hospital & Health Care Used the software for: Less than 6 months ### "Recent convert to VoIP" May 19, 2022 4.0 If you're not technical, and I am not, then it's a steep learning curve. I didn't feel like the tech support was as good as it could be. Pros The potential savings and the sales reps weren't pushy. I initially was going with another provider, but their sales team incessantly called me to sign up when the hardware wasn't ready. Cons The lack of features and documentation were low points. Review Source Similar Products Featured ## Related categories [VoIP](https://www.capterra.com/voip-software/)