Softphone SDK: Control your communications future
Acrobits Softphone SDK lets telecom providers build branded calling applications with enterprise-grade features and seamless integration
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Softphone SDK: Control your communications future
Acrobits Softphone SDK lets telecom providers launch branded, SIP-agnostic apps, cutting costs, accelerating revenue, and future-proofing their communications.
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Works with the SIP core you already run, no lock-in, no hacks
Stop paying per-seat app fees or wrestling with "white-label" solutions that never quite fit. Our SDK gives you raw access to codecs, call flows, and UI—so you ship a product that's yours, not a reskin.
- Certified with major hosted PBX platforms like Metaswitch, BroadSoft, FreeSWITCH, Ooma, and more
- Multi-transport support: TCP, UDP, TLS, SRTP for flexible, secure connectivity
- Built-in BLF, presence, and SMS support (where carrier-supported)
- Proven NAT traversal and SBC/firewall-friendly architecture
Grow, migrate, or scale your backend—the app adapts without a full rewrite.
Works with the SIP core you already run, no lock-in, no hacks
Stop paying per-seat app fees or wrestling with "white-label" solutions that never quite fit. Our SDK gives you raw access to codecs, call flows, and UI—so you ship a product that's yours, not a reskin.
- Certified with major hosted PBX platforms like Metaswitch, BroadSoft, FreeSWITCH, Ooma, and more
- Multi-transport support: TCP, UDP, TLS, SRTP for flexible, secure connectivity
- Built-in BLF, presence, and SMS support (where carrier-supported)
- Proven NAT traversal and SBC/firewall-friendly architecture
Grow, migrate, or scale your backend—the app adapts without a full rewrite.
Freedom to switch, reduced dependency
Maintain control if a vendor sunsets or pivots. With Acrobits, your softphone SDK and brand stay yours, no forced migrations, no lost users.
Request a Free POC
Freedom to switch, reduced dependency
Maintain control if a vendor sunsets or pivots. With Acrobits, your softphone SDK and brand stay yours, no forced migrations, no lost users.
Request a Free POC
Enhance your softphone app with Premium Features
Choose only what you need. Pay as you grow. Expand when you're ready.
140M+
Endpoints live
160M
Interactions/month
99.995%
Push delivery
600+
Apps using our tech
99.995% push-delivery success across 24k Android device models.
600+ apps in 70 countries, including healthcare and government.
Acrobits SDK: modular softphone API for every stack
Facade
Facade
Upsell/cross-sell web views
Unlock upsell and cross-sell opportunities by allowing users to view and browse your website from within your application.
libSoftphone
libSoftphone
Group messaging
Leverage a ready-made group messaging solution that makes it simpler than ever to stay in touch.
Both SDK layers are part of the Acrobits SIP Mobile SDK, integrating seamlessly with SIPIS for push reliability and call continuity.
iOS and Android libraries
Native SDKs optimized for each platform with full API access and comprehensive documentation.
SIPIS push infrastructure
Reliable push notifications for incoming calls even when the app is in the background or terminated.
Native CallKit / ConnectionService UX
Seamless integration with native phone UI for a professional calling experience.
QR provisioning
Quick account setup with QR code scanning for effortless user onboarding.
Client APIs for rate checks and web callbacks
Real-time rate queries and balance checks directly within your application.
Multi-platform compatibility
Build once, deploy everywhere with support for multiple frameworks and platforms.
Swift/Obj-CKotlin/JavaReact NativeFluttermacOS CatalystWindows MAUIExtensive technical documentation
Comprehensive guides, API references, and code samples to accelerate your development.
Acrobits SDK: modular softphone API for every stack
Facade
Facade
Upsell/cross-sell web views
Unlock upsell and cross-sell opportunities by allowing users to view and browse your website from within your application.
libSoftphone
libSoftphone
Group messaging
Leverage a ready-made group messaging solution that makes it simpler than ever to stay in touch.
Both SDK layers are part of the Acrobits SIP Mobile SDK, integrating seamlessly with SIPIS for push reliability and call continuity.
iOS and Android libraries
Unified VoIP SDKs for robust, native SIP integration on mobile platforms, ready for your branding.
SIPIS push infrastructure
Ensures always-on registration, reliable push notifications, and battery-efficient VoIP delivery.
Native CallKit / ConnectionService UX
Delivers a seamless, system-level call experience for both iOS and Android users.
QR provisioning
Onboard users in seconds, no passwords, no typos, just a single scan or magic link.
Client APIs for rate checks and web callbacks
Enable KYC, top-ups, number buying, and post-call automation directly from your app.
Multi-platform compatibility (Windows/macOS parity)
Extend your SIP software to desktop, maintain brand and feature parity across every device.
Swift/Obj-CKotlin/JavaReact NativeFluttermacOS CatalystWindows MAUIExtensive technical documentation
Comprehensive guides, code samples, and provisioning docs to accelerate your team's success.
Security and compliance: enterprise-grade by default
Security controls
TLS for SIP signaling
SRTP media encryption
Optional ZRTP/DTLS for end-to-end
Certificate management
Granular logging scope
Key rotation support
Acrobits aligns with HIPAA, GDPR, and telecom-grade security standards, giving you full control over your data path and encryption.
- SIP over TLS: encrypted signaling between app and SBC/PBX
- SRTP media: protected audio/video streams
- Policy and cert store: enforce enterprise controls at the core
- Carrier peering: maintain QoS and compliance at the network edge
Security and compliance: enterprise-grade by default
Security controls
TLS for SIP signaling
SRTP media encryption
Optional ZRTP/DTLS for end-to-end
Certificate management
Granular logging scope
Key rotation support
Acrobits aligns with HIPAA, GDPR, and telecom-grade security standards, giving you full control over your data path and encryption.
- SIP over TLS: encrypted signaling between app and SBC/PBX
- SRTP media: protected audio/video streams
- Policy and cert store: enforce enterprise controls at the core
- Carrier peering: maintain QoS and compliance at the network edge
Security and compliance: enterprise-grade by default
Security controls
TLS for SIP signaling
SRTP media encryption
Optional ZRTP/DTLS for end-to-end
Certificate management
Granular logging scope
Key rotation support
Acrobits aligns with HIPAA, GDPR, and telecom-grade security standards, giving you full control over your data path and encryption.
- SIP over TLS: encrypted signaling between app and SBC/PBX
- SRTP media: protected audio/video streams
- Policy and cert store: enforce enterprise controls at the core
- Carrier peering: maintain QoS and compliance at the network edge
Business impact: efficiency through capability
Ready to build?
Building with Acrobits SDK means assembling the right team and infrastructure. Most successful integrations share these traits:
Readiness checklist:
- SIP expertise or partnership
- Backend/infrastructure team
- Mobile development capability
- DevOps/release pipeline
- QA for voice & video
- Customer support readiness
Readiness level
ROI depends on in-house SIP expertise. The more you bring, the more you gain from the Acrobits voice over IP development kit.
Business impact: efficiency through capability
Ready to build?
Teams with SIP protocol integration experience can reduce support, automate onboarding, and ship voice innovation faster.
Readiness checklist:
Readiness level
ROI depends on in-house SIP expertise. The more you bring, the more you gain from the Acrobits voice over IP development kit.
Business impact: efficiency through capability
Ready to build?
Teams with SIP protocol integration experience can reduce support, automate onboarding, and ship voice innovation faster.
Readiness checklist:
Readiness level
ROI depends on in-house SIP expertise. The more you bring, the more you gain from the Acrobits voice over IP development kit.
Book a live demo
See the Acrobits Softphone SDK in action: architecture review, push setup, QR provisioning, and a roadmap to platform independence.
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