OSDial vs SIP.IO

OSDial is a free, AGPL-licensed call-center dialer for inbound, outbound, and blended calling, including IVR. It supports predictive, power, manual, adaptive, and broadcast dialing, with custom dialplans, carrier failover, call recording, answering-machine detection, skill routing, and local presence. Campaign tools handle lead import and export, custom fields, advanced search, list mixing, external databases, and custom disposition codes. Real-time and summary reports cover calls, leads, agents, lists, and server performance. Agents can log in remotely with a phone and web browser. APIs support lead loading from an external webpage and basic administration and agent functions. OSDial can scale from a few agents to several hundred, with a sizing guide for deployments up to 480 seats. Version 4.0 is under development as a hosted solution; downloadable legacy version 3.0 remains available. Its installer erases the target drive and installs a CentOS-based operating system. There are no license fees or required support hours, but OSDial Cluster, SQL Cluster, Multi-tenant, Archive, and E-mail Template modules are non-free. Platforms include API, Linux, self-hosted, and web.

SIP.IO is a programmable voice and cloud contact center platform for UCaaS, CCaaS, and Voice AI. Its listed services include business phone service and SIP trunking, alongside skills-based queues, agents, a wallboard, and reporting. Developers can embed a softphone in an app for browser-based WebRTC calls. Messaging includes SMS-to-email and inbound SMS webhooks, with webhook requests signed using HMAC. Call recording supports policy-based rules, pausing and resuming during a call, and playback through an audited API. Voice AI agents can escalate to a person; the platform also offers searchable call transcripts and AI summaries, with the option to use a customer's AI provider. SIP.IO lists managed, white-label Microsoft Teams Direct Routing with tenant setup by API. Its free tier includes trial credit, a test phone number, and access to call flows, queues, and contact center features without a credit card. Usage-based voice and number pricing is available by contacting SIP.IO; published rates are examples, not the final rate card. SIP.IO says it is ISO/IEC 27001 certified and that HIPAA and a Business Associate Agreement program are not offered.