Groundwire: VoIP SIP Softphone

In-app purchases
460 reviews
Content rating
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About this app

Make voice and video calls, send messages, and more with our military-grade encrypted B2B SIP softphone app. Groundwire is designed for business users looking for more out of their SIP softphone.

Groundwire is preconfigured to support many of the most popular providers. Download Groundwire today to enjoy a more secure B2B experience for all essential business communications. Groundwire delivers high-quality communications, best-in-class security, and a feature-rich, enterprise-like experience for individual users.

Help your business get online and adjusted to remote work with Groundwire without sacrificing on security and accessibility.

What can Groundwire do for you?

- High-quality audio. Experience crystal clear communications. We support Opus, G.722, G.729, G.711, iLBC, and GSM audio formats.

- HD-quality video. Communicate in up to 720p HD. Our app supports both H.264 and VP8.
SMS and rich messaging.

- Let your employees quickly send SMS and rich messages through an intuitive UI.

- Call transfers and conferencing. Keep your essential operations going with built-in call transfers and conferencing.

- Integrated voicemail. Miss an important call? Groundwire comes with a reliable voicemail feature.

- Military-grade encryption. We use a powerful encryption stack that uses SRTP, TLS, and ZRTP (free for incoming calls - paid add-on for outgoing calls) to keep your company's data safe.

- Reduce your battery drain. Leverage the power of push notifications to stay notified and reduce your battery drain.

- Seamless call transition. Make calls using WiFi or your data plan. Groundwire offers seamless transition during the critical handover stage.

- Customize your experience. Groundwire is highly customizable. Customize your SIP settings, the UI, ringtones, and more.

- 5G-friendly. Take advantage of all the benefits 5G has to offer with an SIP softphone that’s built for 5G.

- Multi-device compatibility. Groundwire is compatible with any modern mobile operating system.

- No hidden fees. Don’t worry about hidden fees or subscriptions. Your one time fee provides you with a lifetime license.

- Lifetime support and updates. Each Groundwire license comes complete with lifetime support and unlimited updates.
Updated on
Jan 10, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Photos and videos, Audio and 4 others
Data is encrypted in transit
You can request that data be deleted
460 reviews
Scott Smith
January 20, 2023
I have tried several different softphone apps with all of them having various issues. This app has worked without issues. The push notifications come through when I get a call everytime even when I do not have the app running. I contacted customer service a few times for questions before I purchased and then when I began setting up features. They were very responsive and helpful. I highly recommend this app. (I use it with service)
1 person found this review helpful
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A Google user
December 7, 2019
It works but it's not very user friendly. I can't even change the ringtone to differentiate between calls. It's stuck on call integration mode and u can't figure out how to change it. Every call looks like it's coming through my provider now. I'm revising my review. After reinstalling I was able to reset the call settings that were locked during the initial install.
26 people found this review helpful
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Jane Rowe
January 11, 2023
Not reliable for SMS use. After successfully using the app for a couple years, in recent months the app has become unusable with SMS (sip simple). It does not activate reliably when a new sms is received, it only displays when you open the app then sms even from the day before will appear as if they were new. When it does sometimes activate for a new sms, it displays older sms along with the new one so the pop-up notflification shows for an old recipient and message not the new one.
2 people found this review helpful
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What's new

Fixed crashes reported from firebase
Fixed crash on deleting events
Fixed issue with contacts search