{"slug": "show-hn-jamb-ai-voice-agents-for-group-calls", "title": "Show HN: Jamb AI - Voice Agents for Group Calls", "summary": "Jamb co-founder Sharat announced Donna, a voice agent that joins group calls and group chats for construction teams, converting speech into tasks, call summaries and attributed transcripts so that project records update from calls rather than forms. Jamb, which calls itself a system of record for construction teams, said 4 out of 5 US residential builders are small teams of 1-4 employees, and demonstrated the agent at Boston's Voice AI meetup in a three-way call where Donna listens quietly and speaks only when summoned, plus demos of task management, recall from prior calls and chats, and interpretation. The company said its first version failed because Donna heard herself through the phone and replied to herself, and that prompt instructions alone were not sufficient for turn control in multi-user calls.", "body_md": "Sharat on X: \"I'm Sharat, co-founder of Jamb (https://t.co/dqZaFg0OHJ, https://t.co/vrRoQ2fZDC)\nJamb is a system of record for construction teams. 4 out of 5 US residential builders are made up of small teams (1-4 employees). The general contractor is often one person who runs the job from a truck, on calls all day. That person rarely stops to open a project tool and fill in a form. The data already exists. It sits inside the phone calls.\nSo we put a voice agent in the calls and the group chats. Her name is Donna. She turns speech into tasks, a call summary and an attributed transcript. The record updates from the call, not from a form. She is also the AI receptionist on your business line.\nThread (1/n): Demos from what we showed at Boston's Voice AI meetup. We show a three-way phone call where the agent listens quietly and speaks only when summoned. Three more demos show Donna managing tasks, recalling details from previous calls and chats, and acting as an interpreter.\nEvent: https://t.co/NJsp78zbBo\nSlides: https://t.co/wH2Ols5vor\"\n\nI'm Sharat, co-founder of Jamb (jamb.ai, crunchbase.com/organization/j…)\nJamb is a system of record for construction teams. 4 out of 5 US residential builders are made up of small teams (1-4 employees). The general contractor is often one person who runs the job from a truck, on calls all day. That person rarely stops to open a project tool and fill in a form. The data already exists. It sits inside the phone calls.\nSo we put a voice agent in the calls and the group chats. Her name is Donna. She turns speech into tasks, a call summary and an attributed transcript. The record updates from the call, not from a form. She is also the AI receptionist on your business line.\nThread (1/n): Demos from what we showed at Boston's Voice AI meetup. We show a three-way phone call where the agent listens quietly and speaks only when summoned. Three more demos show Donna managing tasks, recalling details from previous calls and chats, and acting as an interpreter.\nEvent: luma.com/gqxuajjg?tk=oj…\nSlides: docs.google.com/presentation/d…\n\nI'm Sharat, co-founder of Jamb (jamb.ai, crunchbase.com/organization/j…)\nJamb is a system of record for construction teams. 4 out of 5 US residential builders are made up of small teams (1-4 employees). The general contractor is often one person who runs the job from a truck, on calls all day. That person rarely stops to open a project tool and fill in a form. The data already exists. It sits inside the phone calls.\nSo we put a voice agent in the calls and the group chats. Her name is Donna. She turns speech into tasks, a call summary and an attributed transcript. The record updates from the call, not from a form. She is also the AI receptionist on your business line.\nThread (1/n): Demos from what we showed at Boston's Voice AI meetup. We show a three-way phone call where the agent listens quietly and speaks only when summoned. Three more demos show Donna managing tasks, recalling details from previous calls and chats, and acting as an interpreter.\nEvent: luma.com/gqxuajjg?tk=oj…\nSlides: docs.google.com/presentation/d…\n\nA standard voice-agent loop expects one user. A group call breaks it.\nIn our first version, Donna heard herself through the phone and replied to herself. Without turn control, she also answered when two humans spoke to each other. Prompt instructions alone were not sufficient to\n\nDonna files a task from a live call, by voice. Nobody opens a form.\nIt is a three-way video call inside the Jamb app. Donna is in the member list, same as the two of us.\nCrews share tasks. Donna knows who spoke, but keeps the task in the shared list. Seth's follow-up updates\n\nDonna recalls a past call, then reads a PDF dropped into the chat mid-call.\nI ask Donna what we decided on our previous call. She answers from that call's summary. She names the task it produced: \"Prepare for meetup presentation\", now In Progress.\nThen, still mid-call, I share\n\nOn a jobsite, the crew and the GC do not always share a language. Donna interprets live.\nInterpreter mode replaces the translation app you pass back and forth. Both people speak naturally around one phone. She asks which two languages. Then she waits for each speaker to finish\n\nWe are six people, one year into building Jamb, a system of record for construction teams. Donna, our voice agent, fills it from calls and group chats.\nWeb: jamb.ai\nCrunchbase: crunchbase.com/organization/j…\nLinkedIn: linkedin.com/company/jamb-a…\nInstall Jamb. Make a group.", "url": "https://wpnews.pro/news/show-hn-jamb-ai-voice-agents-for-group-calls", "canonical_source": "https://twitter.com/sharat_sc/status/2100638882341486961", "published_at": "2026-09-30 19:24:36+00:00", "updated_at": "2026-09-30 19:49:09.809042+00:00", "lang": "en", "topics": ["ai-agents", "ai-products", "artificial-intelligence"], "entities": ["Jamb", "Donna", "Sharat", "Boston Voice AI meetup"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/show-hn-jamb-ai-voice-agents-for-group-calls", "markdown": "https://wpnews.pro/news/show-hn-jamb-ai-voice-agents-for-group-calls.md", "text": "https://wpnews.pro/news/show-hn-jamb-ai-voice-agents-for-group-calls.txt", "jsonld": "https://wpnews.pro/news/show-hn-jamb-ai-voice-agents-for-group-calls.jsonld"}}