# Page 2 | SIP.US Reviews 2026. Verified Reviews, Pros & Cons | Capterra > Page 2 - 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 2 - Reviews of SIP.US ## Showing most helpful reviews Showing 26-50 of 85 Reviews Sort by: Most Helpful Rating Company Size Reviewer's Role Length of Use Frequency of Use TP TJ P. IT Director Aviation & Aerospace Used the software for: 6-12 months ### "Good service, great provider, tad pricey though" June 12, 2019 5.0 Overall experience has been good. The major thing I wish they had is a 24/7 phone number that I could pick up the phone and call for tech support. When we do cutovers and new projects it's usually done after hours or on a weekend to avoid cutting into business hours, so having support 24/7 would be hugely important to tech people like me. Pros Service is outstanding, don't have to deal much with dropped calls or latency issues. The web interface is intuitive and easy to use, and most importantly the support is pretty good (email/ticket only though, really wish they offered more support over phone) Cons I don't think they have phone support that you can call in normal, if they do please let me know and I'll modify this review. Only other drawback is cost is a tad higher than some others out there. But SIP.US is pretty easy and reliable. Reason for choosing SIP.US Because I've used before and they are easy to manage/work with. And because quality of call service has been good so far. A lot of cheap providers route calls far away (sometimes overseas) and that causes high latency and more dropped calls. Review Source MA Milton A. President Medical Practice Used the software for: 2+ years ### "Good value, direct customer control SIP routing service company" June 19, 2019 4.0 Lowering the cost of all phone services. Pros Customer direct control of call routing. Cons Problems with compatibility and support connecting with some IPPX routing systems, such as Ward Mudy's IncrediblePBX software on a computing platform of the customer's choice for maximum cost efficiency and features/capabilty support. Reason for choosing SIP.US The straight forward customer control interface combined with direct support, by email, by the \[SENSITIVE CONTENT HIDDEN\]. \[SENSITIVE CONTENT HIDDEN\] answers were commonly a bit over-my-head, experience level, they were always helpful, helped my solve connection problems (usually rapidly) and offered a winning customer experience.None of the other SIP.US support reps have ever been quite as helpful as \[SENSITIVE CONTENT HIDDEN\] routinely was. Review Source SR Shafiq R. Director Infrastructure Computer Software Used the software for: 2+ years ### "Poor Support " May 19, 2022 3.0 I enabled sms feature I think from start on this year and I am unable to use till today, I have opened a ticket from that time and ticket is still open but no resolution. after weeks one line appear that we are working on it so I stopped asking and started a parallel service Ringcentral and in future we may move ourselves to Ringcentral coz nobody can wait for years. Pros Yes calls are working fine. we are using from multiple years and happy with call quality. Cons I enabled sms feature I think from start on this year and I am unable to use till today, I have opened a ticket from that time and ticket is still open but no resolution. after weeks one line appear that we are working on it so I stopped asking and started a parallel service Ringcentral and in future we may move ourselves to Ringcentral coz nobody can wait for years. Review Source VB Victor B. Consultant Information Technology and Services Used the software for: 2+ years ### "SIP.us service" June 26, 2019 5.0 SIP.us allowed me to be operational on multiple platforms. Integration is simple, number selection is good, and implementation is fast. I had a client that needed to LNP 100 DID's and get services up quickly...SIP.us team had me up and working within 2 hours. The numbers were ported very quickly with no issues. Pros It's easy to use and it gets the job done. I've been using the service for over 4 years and it's been fantastic. I use it with X-Lite, Cisco CME, Kerio, Cisco phones converted to SIP, GrandStream, etc. The documentation around setup is easy to follow. I'm a consultant and i travel all over and i'm able to connect where ever i go. Cons I've had a few issues with address validation when setting up billing...but i made a phone call and support resolved it over the phone. I haven't had any issues with service. Review Source TS Thomas S. Systems Consultant Telecommunications Used the software for: 2+ years ### "Excellent & easy to use service." June 4, 2019 5.0 Have been connected to SIP.US for many years. They've updated the web site to make it even friendlier and self-service is a snap. The only issues I've run into were local to my network & ISP but the support team was able to provide enough clues as to likely cause that I was able to get things up and running. Pros I have a home lab with a couple of Asterisk servers. Provisioning trunks & numbers is a breeze. I do contract work for businesses in London & Auckland and setting up a local DID is super helpful. Since my usage is quite variable I really appreciate the prepaid pay for what you use plans. Cons Haven'r run into any snags. I would appreciate SMS options for significantly less cost (although I haven't looked into this in a while). Review Source RM Robert M. Chief Technology Officer Insurance Used the software for: Less than 6 months ### "SIP.US saved the day and changed how I look at phone service forever." May 23, 2018 5.0 When I happened across SIP.US in a google search on the weekend when our physical phone system crashed and we had to build a virtual one quickly and get it up and running before Monday, I had never used SIP trunks before. I had not used them because I was unsure of the technology and worried about call quality, the phone company always wanted to bring in a separate circuit to run SIP trunks (more bureaucracy and red tape). SIP.US was fast and easy to get going and JUST WORKS! We enjoy great call quality with SIP.US and have the flexibility to add and remove phone numbers and trunks at will. We can respond to market conditions instantly scaling up or down at will. I wish I would not have waited so long to give this service a try it really does change the way that we think about voice service. I suggest using the free trial and just giving it a shot, once you sign in and see the portal and all that you can do INSTANTLY you will be hooked. Pros SIP.US is very quick and easy to set up and use. I set it up at around 10pm on a weekend when our phone system had died and we had to recreate a virtual one that could not connect to our existing PRI. Without talking to anyone I had a SIP trunk up and taking calls in less than half an hour without having any previous SIP trunk experience. The next day (on a weekend!) I received a call from the executives at SIP.US to make sure I had everything that I needed. The support team proceeded to help us get all of our numbers ported as quickly as possible (you can do this from the web portal but they were just being nice.) Once I understood the ease of use (no calling and waiting for the phone company to wait through their bureaucracy), reliability and clarity of using SIP trunks through SIP.US I could no longer imagine relying on a traditional phone company for phone service. SIP.US is a game changer, we have never looked back. SIP.US is how phone service should be. Cons I have not found anything to dislike. SIP.US does what it says it is going to do and keeps on doing it. Full control of my phone service from a web browser, what's not to like? Review Source KA Kyle A. Senior Engineer Electrical/Electronic Manufacturing Used the software for: 2+ years ### "Set it up and forget it" June 28, 2019 5.0 Pros Sip.us easily integrates with our Asterisk PBX. Their customer portal is simple and straight forward to use. We have been using them for years and their uptime has been excellent. Cons When we had an 800 number, we had to pre-pay blocks of dollars for those calls. It was awkward from an accounting standpoint. We don't have the toll free number anymore so that is no longer an issue. Review Source JM Jim M. Cloud Engineer Computer & Network Security Used the software for: 2+ years ### "SIP.us is a great vendor partner" June 12, 2019 5.0 SIP.US gave us the ability to provide VOIP managed services without needing the expensive and complex trunking issues. I have always been confident in transferring the phone numbers to sip.us. Pros The timely support when I was having issues with my software or my clients software interfacing with sip.us was invaluable. They contacted me directly when there was an administrative (billing issue), which was appreciated. I also like the flexible services and ability to setup trunk accounts. Cons I'd like to see some advances in encrypting the sip traffic and the ability for me to resell trunk accounts to my customers Review Source LA Leo A. CEO Broadcast Media Used the software for: 2+ years ### "SIP US - " June 19, 2019 4.0 Obviously using them for seven years the overall experience is good. There is room for improvement, but management hasnt seemed interested in making improvements. Pros Fairly simple to implement. Over the past seven years I have used the service it has been very reliable. Cons Billing can be a bit confusing and customer service a bit difficult at times. This situation has improved over the years however. You have a mix of prepaid and billing which can cause confusion and extra steps. DID billing doesnt come out of prepaid funds like most services. It is billed seperatly and cannot be prepaid. Review Source SH Steve H. VP Sales Telecommunications Used the software for: 2+ years ### "Tip of the Hat to SIP.US" June 12, 2019 5.0 After nearly 5 years the internal SIP.US team continues to be a thought leader when we need new solutions. It happens often that we present an idea and they say "we have been working on that" and they can show us examples of their progress. Priceless. Pros The portal for searching for available numbers is very easy to use. We have even integrated our Slack channel into the product so that Sales personnel can use it with the clients. Cons At this point there is nothing that comes to mind regarding "least liked". Review Source CC Chad C. IT Supervisor Farming Used the software for: 2+ years ### "SIP.US solid services" June 4, 2019 5.0 My justification for using SIP.us was simple: better pricing than anyone with similar features/ratings. My justification for using SIP.us when expanding to ALL voip: value and 2 years of uninterrupted service. Pros SIP.US provides rock-solid VoIP trunks. We used them for our first VoIP PBX deployment and have literally had zero problems with them. Their reliability to provide consistent service is imperative as we're a heavy voice user. Cons I have no complaints or negative experiences with SIP.us Review Source AM April M. IT Admin Telecommunications Used the software for: 2+ years ### "Resort Phones" May 27, 2022 5.0 I am overall happy Pros Easy to set up and the portal is easy to navigate Cons The support with hosted pbx. Sometimes when I need help I have to go back and forth with support between SIP and our phone system provider. Review Source AD Aaron D. IT Director Hospital & Health Care Used the software for: 1-2 years ### "Great SIP Trunk Provider" May 27, 2022 5.0 It's been a great experience overall with nothing really to care about. The service has been rock solid. Even during the DDOS attack that occurred earlier in 2022. Pros The ease of setup was fantastic and the documentation that they make for different PBX system makes setup a breeze. Cons The customer portal feels a little disorganized to me. I've had to poke around the menus for a couple of minutes trying to find something. Once I submitted a support request to find an option in the website. Review Source RK Ron K. Security Tech Support Security and Investigations Used the software for: 2+ years ### "System Independent" June 12, 2019 5.0 We have a system that makes outbound calls via SIP. SIP.US gives us an independent communication separate from our corporate phone system. Pros The software provides real time reports. From time to time we receive complaints that a call didn't go through. We can pull a report and see if the went to the right phone number and if it was picked up. Cons Email notification with how many times all trunks are busy but it doesn't say when this happened. Review Source DRR Dr. Raymond R. CEO - CTO Telecommunications Used the software for: 2+ years ### "Excellent SIP Services Provider" June 4, 2019 5.0 We have utilized a number of providers and this provider is the most stable, responsive and reliable we have found. Pros SIP Services are very stablr. Redundant Facilities Minimum number of networl issues Excellent Connectivity Excellent and time efficient tech support Minimum number of configuration issues Cons We have found no problems or issues to report. Any issues we may have encountered were quickly resolved. Review Source SB Steve B. Network Admin Business Supplies and Equipment Used the software for: 1-2 years ### "Impressive uptime and call quality" June 19, 2019 5.0 My initial concerns were primarily regarding uptime and call quality and neither have been an issue in close to 2 years now. I've had to reach out to the support department on occasion and pleasantly surprised by their knowledgeable staff and responsiveness any time I've needed something. Pros The self-service aspect eliminates calling, quoting, back and forth emails.. just saves a ton of time when you know what you're trying to get done and have a limited timeline. Cons If alternative calling plans for lower entry costs were offered I'd definitely be using this in more locations. Review Source GA Greg A. Owner Information Technology and Services Used the software for: 2+ years ### "Best Implementation!" June 4, 2019 5.0 SIP.US was a great find. I wanted to set up my own SIP trunk, run my own PBX, use my own IP phones. I thought the hardest part was going to be the SIP trunk. With SIP.US, it was actually the easiest part of the system to set up. Not one glitch, no surprises, and it is the most economical choice I could hope for. Pros Easy to set up, easy to use, easy to manage! Cons I have zero complaints! SIP.US was very easy to work with. Review Source MC Matthew C. Owner Information Technology and Services Used the software for: 2+ years ### "Great Service" June 19, 2019 5.0 They do what we pay for and have not even had to use their backup servers as the primary for has been rock solid. Pros SIP.US support team went above and beyond pre and post deployment to allow us to get our phone system up. Cons There was an increase in the price of the service a few years back but we really cant complain about going from $.01 to $.012 per min. Review Source RV Remco V. Managing director Entertainment Used the software for: 2+ years ### "Just works!" May 19, 2022 5.0 Pros Great provider. We only use one trunk for our business and once it is setup, no need to change anything. It just works Cons Nothing really that bothers me. I only use the trunk service and we ported some numbers. Review Source GK Greg K. IT Manager Retail Used the software for: 6-12 months ### "Highly recommended provider!" June 4, 2019 5.0 SIP.US was our choice for SIP trunking when we cut ties with a bundled managed service provider. The service level has been outstanding, availability being something we take for granted. Their customer service and support are refreshingly effective, which can be rare with traditional telecom. Pros Ease of use to convert our SIP services over to a new provider. The porting process was seamless, the customer service communication was effective, and the after cutover support has been stellar. Cons Nothing I can think of offhand. Perhaps additional reporting aside from just call records. For example a channel utilization report. Reason for choosing SIP.US Better value, better support. Review Source NV Nathan V. IT Administrator Information Technology and Services Used the software for: 2+ years ### "Great Bring Your Own Bandwidth SIP Provider" June 12, 2019 5.0 I have used SIP.US for my own SIP Trunking, and for two of my business clients. The service is fast and easy to setup. When I have had a technical issue, SIP.US support is quick to respond. Pros Easy to use, add/remove call paths, DIDs, etc. Cons I have nothing negative to say about SIP.US, the service has met/exceeded our needs. Review Source DA DALTON A. MGR Computer Networking Used the software for: 1-2 years ### "SIP.US Review" June 12, 2019 5.0 so far... can complaint at all. Pros the posibility of getting better prices, reliability, support. Cons so far so good, no complains so far, everything is good ! Reason for choosing SIP.US I give it the first try and better and faster respond from the at that time manager (CEO) and now the one in charge for sales of this type. They worked with me in what i need... Review Source JC Jeffrey C. Owner Telecommunications Used the software for: 1-2 years ### "Sup .us review" June 5, 2019 5.0 Great Pros Easy to set up, I'm an avaya guy and simple to setup, had a few issues but the tech support guy was awsome. I feel the YouTube videos made were because of me and avaya issues. But working great and has been for a long time. I have set up a few customers with sip.us for cost savings Cons Only issue is with web portal, the size format is wrong you have to do a lot of mousing to get to submit buttons but that's it. Review Source ES Erick S. Owner Information Technology and Services Used the software for: 2+ years ### "Flawless Service" June 12, 2019 5.0 Has been the best experience for the 5 years I have used the service. I had to contact support on two occasions when it was something that was my fault and they went above and beyond to assist me. A+ Pros Easy to provision, implement, use and maintain. Cons Nothing negative to say about the service or support Review Source sB stefan B. IT Director Real Estate Used the software for: 2+ years ### "Easy SIP trunking" June 12, 2019 5.0 Overall SIP.us has been great. I continue to do business with them because of the quality of the service Pros Ease of use, and a user-friendly control panel Cons Price per channel is my only complaint. It can get pricey during my peak season when i turn up my channel count Review Source Similar Products Featured