This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
Product upvotes vs the next 3
Waiting for data. Loading
Product comments vs the next 3
Waiting for data. Loading
Product upvote speed vs the next 3
Waiting for data. Loading
Product upvotes and comments
Waiting for data. Loading
Product vs the next 3
Loading
Patter SDK
open-source SDK that gives your AI agent a phone number
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. - PatterAI/Patter
Hi Product Hunt, Francesco here! Nico and I built Patter.
Last year I tried to put an AI agent on a real phone number and lost two weeks to plumbing: carrier websockets, mu-law resampling, barge-in, voicemail detection. None of it was the agent. All of it was glue.
Patter is that glue, open-sourced. MIT, Python + TypeScript, same API in both:
from getpatter import Patter, Twilio, OpenAIRealtime
# bind a phone number, wire your agent, go live
phone = Patter(carrier=Twilio(), phone_number="+15550001234")
agent = phone.agent(engine=OpenAIRealtime(), system_prompt="Be a friendly receptionist.")
await phone.serve(agent, tunnel=True)
That's a live phone number answering with your agent.
Don't take my word for it — call the demo: +1 (920) 7-PATTER. An agent built on the SDK picks up. It's rate-limited, so if it stops answering we hit the daily cap.
What you get:
- Your carrier: Twilio, Telnyx, or Plivo — swap in one line
- Three voice modes from one API: speech-to-speech realtime (OpenAI Realtime, ElevenLabs ConvAI), the pipeline (Deepgram STT → your LLM → ElevenLabs TTS), or hybrid — 27+ provider integrations across the stack
- Barge-in, VAD, transfer, DTMF, voicemail drop, recording
- Self-hosted dashboard: every call's transcript, latency, and cost — your data, your servers
- Local dev with a built-in tunnel (tunnel=True) — test a real call from your laptop, no deploy
Honest framing: if you want something managed and working this week, Vapi and Retell are good at that. Patter is for when you want to own the stack — swap any layer, keep your data, see what every call actually costs.
Current release is 0.7.0, 4,500+ tests green across both SDKs, 950+ stars on GitHub.
pip install getpatter · npm install getpatter
github.com/PatterAI/Patter
Ask me anything about telephony plumbing, latency budgets, or why barge-in took longer to tune than the rest of the pipeline combined :)
About Patter SDK on Product Hunt
“open-source SDK that gives your AI agent a phone number”
Patter SDK was submitted on Product Hunt and earned 12 upvotes and 4 comments, placing #62 on the daily leaderboard. 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. - PatterAI/Patter
On the analytics side, Patter SDK competes within Open Source, Developer Tools, Artificial Intelligence and GitHub — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how Patter SDK performed against the three products that launched closest to it on the same day.
Who hunted Patter SDK?
Patter SDK was hunted by francesco rosciano. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Patter SDK including community comment highlights and product details, visit the product overview.
francesco rosciano