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MicroSIP

Lightweight desktop softphone for Windows that connects to SIP providers and PBX systems

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MicroSIP is a desktop softphone for Windows built on the PJSIP stack, intended for everyday business communication and VoIP use. It connects to standard SIP infrastructure, including SIP providers and PBX systems such as Asterisk-based deployments, FreePBX, and 3CX, covering office, remote, and hybrid work settings.

The application supports voice and video calls (H.264, H.263+, VP8, VP9), DTMF, SIMPLE messaging, and presence. Security features include TLS for SIP signaling and SRTP/DTLS-SRTP for media. Audio support covers a broad codec list including Opus, G.711, G.722, G.729, AMR-WB, and others, alongside WebRTC-based echo cancellation and voice activity detection. It is lightweight and portable, with configuration stored in an INI file, screen reader compatibility (NVDA), multilingual interface, and RTL language support.

MicroSIP targets office communication, remote and hybrid work, customer support desks, and small business VoIP deployments. The pages do not describe a free plan, trial, editions, or seat-based or usage-based packaging.

12 alternatives to MicroSIP

Ranked by how well each tool replaces MicroSIP: shared features, audience, price and popularity.

  1. Zoiper

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    Covers 4 of 12 key features and has a free plan.

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  2. Vonage Business Communications

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    Covers 3 of 12 key features.

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  3. OpenSIPS

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    Covers 1 of 12 key features, has a free plan and is open source.

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  4. Linphone

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    Covers 3 of 12 key features, has a free plan and is open source.

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  5. Voximplant

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    Free plan
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  6. OnSIP

    Hosted VoIP built for the way you work

    Covers 1 of 12 key features and has a free plan.

    Free plan
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  7. Sangoma

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    Covers 3 of 12 key features.

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  8. SignalWire

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    Covers 3 of 12 key features, has a free plan and is open source.

    Free planOpen source
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  9. MobileVOIP

    Cheap international calling app for iPhone, Android and Windows devices

    Covers 2 of 12 key features and has a free plan.

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  10. VoIPstudio

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    Covers 0 of 12 key features.

    57 out of 100 match$6/mo

  11. net2phone

    AI solutions for customer experience built on cloud communications infrastructure

    Covers 3 of 12 key features.

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  12. ClearlyIP

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    Covers 1 of 12 key features.

    56 out of 100 match—