Several SIP accounts at once
PremiumAn office extension and a provider number registered side by side. Pick the account per call; Recents shows which one rang.
A SIP softphone for Mac, iPhone and iPad
Register the account from your PBX or provider. Call over TLS and SRTP, hold, transfer and record.
Shown with demo accounts and sample numbers.
Everything a desk phone does, in an app
Each feature below is in the current Mac and iPhone apps.
Hold, transfer and record
Blind or attended transfer, several calls at once, and recordings saved as WAV on your device.
TLS and SRTP
Encrypt signaling and audio when your server supports it. Set audio encryption to Required to refuse plain calls.
How it worksWorks behind routers
STUN and ICE for home and office networks. Opus for poor connections, G.711 for every PBX.
Calls find you on the Mac
Incoming calls ring in a floating window on every Space and over full-screen apps. SIPdia keeps running in the menu bar when you close the window.
Not available yet: push notifications for incoming calls and contact synchronization. Full feature list
For one desk or a whole team
Individuals
Use your provider's SIP account on your Mac or iPhone, and keep that number apart from your mobile plan.
Businesses and remote teams
Give staff their office extension wherever they work, with transfers, recording and forwarding set at the PBX.
IT and telecom administrators
Standard SIP over UDP, TCP or TLS, SRTP, DNS SRV, outbound proxy and detailed SIP logs.
From account details to your first call
Get your SIP details
Ask your PBX administrator or open your provider's portal for the server, username and password. What is a SIP account?
Add the account
Enter Server, Transport, Username and Password and choose Save and Register. The status dot turns green when the server accepts it.
Call
Dial, answer, hold, transfer or record. Behind a router with one-way audio, add a STUN server and turn on ICE.
Where SIPdia runs
Native apps for macOS 14 and later, and for iOS and iPadOS 17 and later. One purchase covers both.
- Release in preparation
macOS
The Mac app is built and in release preparation. The download link will be published here.
Download link coming with the releaseMac details 
Release in preparationiPhone and iPad
The iPhone and iPad app is built and in release preparation. The App Store link will be published here.
Download link coming with the releaseiPhone / iPad details
Works with standards-based SIP servers
SIPdia registers with PBX systems such as Asterisk, Issabel and FreePBX, and with SIP providers that accept UDP, TCP or TLS and offer Opus or G.711. Forwarding codes need a PBX that supports them.
Setup guides describe configuration only. No partnership or certification is implied.
Integration guidesEncryption where your server supports it
- TLS encrypts SIP signaling between SIPdia and your server.
- SRTP encrypts the audio. Required mode refuses unencrypted media.
- Passwords stay in the Keychain. History and recordings stay on your device.
Protection covers the path to your server. SIPdia has not been independently audited.
Security detailsFree to start, Premium when you need more
Prices will appear on the pricing page once they are published.
Free
- One SIP account
- Make and receive calls, mute, hold, keypad tones
- Blind and attended transfer
- TLS signaling and SRTP media encryption
- STUN and ICE
- Opus and G.711 codecs
- Recents and missed-call notifications
SIPdia Premium
- Everything in Free
- More than one SIP account, all registered at once
- Call recording to WAV on your device
- Call forwarding and Do Not Disturb through PBX feature codes
Frequently asked questions
What is SIPdia?
SIPdia is a SIP softphone, an app that turns your Mac, iPhone or iPad into a phone for a SIP account. You enter the server, username and password from your PBX or SIP provider, and SIPdia registers and places and receives calls over the internet.
Which platforms does SIPdia run on?
SIPdia has apps for macOS 14 or later and for iOS and iPadOS 17 or later. There is no Windows, Linux or Android version at the moment.
Do I need a SIP account or phone service?
Yes. SIPdia does not provide phone numbers or calling service. It connects to a SIP account you already have, from a PBX such as Asterisk, Issabel or FreePBX, or from a SIP provider.
Is SIPdia free?
SIPdia is freemium. The free plan includes one SIP account with calling, hold, transfer and TLS/SRTP. SIPdia Premium adds more accounts, call recording, and call forwarding with Do Not Disturb. Prices will be shown on the pricing page once published.
Can SIPdia receive calls when the app is closed?
Not yet. The app must be open to receive calls. On iPhone it unregisters about 20 seconds after it leaves the foreground, so calls go to voicemail or forwarding. Push notifications for incoming calls are not implemented.
Does SIPdia work with my PBX or provider?
SIPdia speaks standard SIP over UDP, TCP or TLS with Opus and G.711 audio, so it registers with most standards-based servers. Setup has been documented for Issabel, and general guides exist for Asterisk, FreePBX and SIP providers. Check your server's codec, transport and NAT settings.
Are calls encrypted?
They can be. Choose TLS as the transport to encrypt SIP signaling, and set Encrypt audio to Required to use SRTP for the media. Your server must support both, and the server's TLS certificate must be issued by a public certificate authority.
Get SIPdia for your Mac, iPhone or iPad
Bring the SIP account you already have. Download links appear here as each release is published.