Stackmark › Agents

Patter

Open-source voice-AI SDK. The Vapi/Retell alternative for builders who want to own the stack. Give your AI agent a phone number in 4 lines — Python and TypeScript, MIT licensed, Twilio, Telnyx, and Plivo.

• Type: Agent
• Imported from GitHub
• Popularity: 1.1K GitHub stars
• License: MIT
• Source: https://github.com/PatterAI/Patter
• Repository: https://github.com/patterai/patter
• Tags: ai-agent, ai-phone-agent, hermes-agent, llm, mastra, open-source, openai, openclaw, python, realtime-api, sdk, speech-to-text
• Updated: 2026-10-01

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