AI Open Source

Top 7 Open-Source Alternative to Retell AI in 2025

16 min read AI Agent
Retell AI offers production-ready voice agents for phone, SMS, and chat with natural interactions, HIPAA compliance, and 31+ languages, starting at $0.07+/min (voice) and $0.002+/msg (chat). Dograh AI is a scalable, flexible open-source alternative.

Top 7 Open-Source Alternative to Vapi AI in 2025

16 min read AI Agent
Vapi is a developer-focused voice AI platform (rated 2.5/5 on Trustpilot) with costly scaling due to platform + external API fees ($0.23–$0.33/min). Users cite poor support and limited use cases. Unlike Vapi, open-source alternatives offer more affordable, scalable voice AI for real-world needs.

Top 7 Open-Source Alternative to Bland AI in 2025

16 min read AI Agent
Bland AI is a developer-focused voice automation platform with 99.99% uptime, offering 24/7 phone agents for sales, scheduling, and support at $0.09/min. Despite these features, users report performance issues, high costs, and limited no-code options, reflected in its 3.2 Trustpilot rating.