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SPECIFICTION
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MicroSIP

microsip.org

Free plan WindowsmacOSLinux
Visit microsip.org
Spec score 8.2 #6 of 33 in Softphone Software

What it is

MicroSIP is a free Windows desktop softphone for business communication and professional VoIP use. It makes voice and video calls through SIP providers or PBX systems, and can also call an IP address or domain name directly. Call Manager handles multiple simultaneous calls, conferences, blind and attended transfers, and instant messaging. Listed video codecs include H.264, H.263+, VP8, and VP9; DTMF options include in-band, RFC2833, and SIP INFO. SIP signaling can use TLS, while media protection options include SRTP and DTLS-SRTP. MicroSIP says it does not provide user accounts, phone numbers, or telephony services and has no access to end-user information. Windows is listed as supported; Linux, macOS, and BSD are listed for use via Wine. Android, iPhone, and iPad are not supported. The standard edition lists video support, while Lite does not. The project uses the GNU GPL v2 license. A custom-branded softphone build costs €150, paid once; future updates, modifications, or additional features are billed separately.

Spec sheet

Product
MicroSIP is a lightweight Windows desktop softphone for business communication and professional VoIP use.Read 4 Oct 2026 · microsip.org
Integrations
The site names Asterisk, FreePBX, 3CX, and any SIP-compliant provider or server as supported or commonly used infrastructure.Read 4 Oct 2026 · microsip.org
Security
The product page lists TLS encryption for SIP signaling and SRTP and DTLS-SRTP for media protection.Read 4 Oct 2026 · microsip.org
Privacy
MicroSIP says it does not provide user accounts, phone numbers, or telephony services and has no access to end-user information.Read 4 Oct 2026 · microsip.org
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.Read 4 Oct 2026 · microsip.org
License
The site identifies the project license as GNU GPL v2.Read 4 Oct 2026 · microsip.org
Add-ons
The add-ons page lists Chrome and Edge telephone-number detection extensions and CardDAV2MicroSIP, and says third parties develop and maintain them.Read 4 Oct 2026 · microsip.org
Call handling
Call Manager supports multiple simultaneous calls, conference calls, blind and attended transfers, and instant messaging.Read 4 Oct 2026 · microsip.org
Calling
It supports voice and video calls through SIP providers or PBX systems, as well as direct calls by IP address or domain name.Read 4 Oct 2026 · microsip.org
Custom builds
Custom builds are offered as Windows EXE and MSI installers or a portable version, with digitally signed builds listed as available.Read 4 Oct 2026 · microsip.org
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.Read 4 Oct 2026 · microsip.org
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.Read 4 Oct 2026 · microsip.org
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.Read 4 Oct 2026 · microsip.org
Platform
The site lists Windows as supported, Linux, macOS, and BSD via Wine, and says Android, iPhone, and iPad are not supported.Read 4 Oct 2026 · microsip.org

Plans and prices

MicroSIP Free Windows desktop SIP softphone · GPL v2 Read 4 Oct 2026 · microsip.org
Custom-branded softphone build €150, paid once Single one-time payment; starting from €150 Unlimited installations · Future updates, modifications, or additional features billed separately Read 4 Oct 2026 · microsip.org

Every MicroSIP plan and price →

Strong points and limits

Strong points

  • Supports voice and video calls through SIP or PBX
  • Call Manager handles simultaneous calls and conferences
  • TLS, SRTP, and DTLS-SRTP protection options
  • Free Windows desktop softphone under GNU GPL v2

Limits

  • Android, iPhone, and iPad are not supported
  • Lite edition does not include video support
  • Linux, macOS, and BSD use is via Wine
  • Custom-branded build costs €150, paid once

Who it suits

MicroSIP suits Windows users who need a SIP softphone for provider- or PBX-based calls, or direct calls by IP address or domain name. Its call manager includes conference and transfer options for users handling several calls.

Verdict

MicroSIP provides a free desktop SIP calling client with video, call-management tools, and stated signaling and media protection options. Windows is its directly supported platform; other listed desktop systems require Wine.

Where Specifiction places it

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