MicroSIP
MicroSIP is a free softphone for Windows desktop calling over VoIP.
What MicroSIP is
MicroSIP is a free softphone for Windows desktop calling over VoIP. It makes voice and video calls through SIP providers or PBX systems, and can also place calls directly to an IP address or domain name. Its Call Manager handles multiple active calls, conference calls, blind and attended transfers, and instant messaging. The standard edition lists video support; the Lite edition does not. MicroSIP lists video codecs H.264, H.263+, VP8, and VP9, plus DTMF options for in-band, RFC2833, and SIP INFO. SIP signaling can use TLS, and media protection includes SRTP and DTLS-SRTP. The project is licensed under GNU GPL v2. MicroSIP says it does not provide accounts, phone numbers, or telephony services, and has no access to end-user information. Windows is listed as supported, while Linux, macOS, and BSD are listed for use via Wine; Android, iPhone, and iPad are not supported.
Good
- Free plan: free.
- Handles multiple simultaneous calls and conferences.
- Supports blind and attended transfers.
- TLS, SRTP, and DTLS-SRTP are listed.
- GNU GPL v2 project license.
Watch out
- Android, iPhone, and iPad are not supported.
- Lite edition does not support video.
- Linux and macOS require Wine.
Who it suits
MicroSIP suits Windows desktop users who want a SIP softphone for business calling, including people using a PBX or SIP provider. It may also suit users who need simultaneous calls, conference calling, or call transfers.
Verdict
MicroSIP covers core SIP calling and call-management needs on desktop, with a free plan and support for common SIP infrastructure. Check platform requirements carefully: Windows is supported, while other listed desktop platforms use Wine and mobile devices are unsupported.
Plans and prices
From MicroSIP's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| MicroSIP | Free | Windows desktop SIP softphone · GPL v2 |
| Custom-branded softphone build | €150, paid once | Unlimited installations · Future updates, modifications, or additional features billed separately · Single one-time payment; starting from €150 |
The facts
Each one read from MicroSIP's own pages, with the date it was checked.
What it does
- Add-ons
- The add-ons page lists Chrome and Edge telephone-number detection extensions and CardDAV2MicroSIP, and says third parties develop and maintain them.checked 4 Oct 2026
- Call handling
- Call Manager supports multiple simultaneous calls, conference calls, blind and attended transfers, and instant messaging.checked 4 Oct 2026
- Calling
- It supports voice and video calls through SIP providers or PBX systems, as well as direct calls by IP address or domain name.checked 4 Oct 2026
- Custom builds
- Custom builds are offered as Windows EXE and MSI installers or a portable version, with digitally signed builds listed as available.checked 4 Oct 2026
- Data protection
- The website privacy policy states that it processes personal data under GDPR and that full payment card details are not stored by microsip.org.checked 4 Oct 2026
- Downloads
- The downloads page lists standard and Lite editions, each with a portable ZIP version; it lists video support for the standard edition and none for Lite.checked 4 Oct 2026
- Integrations
- The site names Asterisk, FreePBX, 3CX, and any SIP-compliant provider or server as supported or commonly used infrastructure.checked 4 Oct 2026
- License
- The site identifies the project license as GNU GPL v2.checked 4 Oct 2026
- Media
- The product page lists video codec support for H.264, H.263+, VP8, and VP9, plus DTMF support for in-band, RFC2833, and SIP INFO.checked 4 Oct 2026
- Privacy
- MicroSIP says it does not provide user accounts, phone numbers, or telephony services and has no access to end-user information.checked 4 Oct 2026
- Product
- MicroSIP is a lightweight Windows desktop softphone for business communication and professional VoIP use.checked 4 Oct 2026
- Security
- The product page lists TLS encryption for SIP signaling and SRTP and DTLS-SRTP for media protection.checked 4 Oct 2026
- Support
- The contact page says the team answers user questions when possible but may not have time to reply to all inquiries, so replies may be delayed.checked 4 Oct 2026
Where it runs
- Platform
- The site lists Windows as supported, Linux, macOS, and BSD via Wine, and says Android, iPhone, and iPad are not supported.checked 4 Oct 2026
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