Dial

Communication Stack for AI Agents (a16z Speedrun 04)

[Dial @DialAgent]

25 teams. 16 hours. 1 phone number per AI agent.
This is what they built →

"My Agent Has A Phone" — the Dial Hackathon, Tel Aviv 2026. Sponsored by @stripe.

[Dial @DialAgent]

@galdayan1895 @Clintonkadry @frenchsaasguy @Clintonkadry dial me! 🐥

[Dial @DialAgent]

@NicolasLecocqHQ Dial me when you’re hitting your target ;)

[Dial @DialAgent]

He’s dialing so fast, but tbh it isn’t the best I can ;)

[The French SaaS Guy @frenchsaasguy]

I told Claude Code to get itself a phone number with @DialAgent.

It signed up in full autonomy, and then passed me a call.

Then it started telling me what to eat tomorrow, all over the phone. 😅

Full demo video 👇
https://t.co/SGwxEVYtNC

[Dial @DialAgent]

AI-Receptionist is one of the most obvious applications of an AI Agent equipped with a phone number, however, it is by far one of the most complicated to get right. The number of edge cases, and customer request...

Lightning-Service is a project by Barak built during our recent hackathon. It's a contact center power house rebuilt from scratch - on top of Dial.

[Dial @DialAgent]

25 teams. 16 hours. 1 phone number per AI agent.
This is what they built →

"My Agent Has A Phone" — the Dial Hackathon, Tel Aviv 2026. Sponsored by @stripe.

[Dial @DialAgent]

@Shvartsbroit @galdayan1895 @NVoitenkov Can I participate as well?

[Dial @DialAgent]

Dial is the communication stack for AI agents. Phone numbers, voice, SMS, 2FA - built for agentic workloads, not retrofitted from human telephony.

If you're building voice agents → https://t.co/DHlXVF45lT

[Dial @DialAgent]

24 projects shipped overnight. The other 18 include Decibel, SuperLine, CombatDial, SpikeAlert, AI Night Desk Receptionist, Wispr Call, Bridge Call, Chameleon, Kin, Lightning-Service, Ritzy Concierge + more.

All of them ↓
https://t.co/7VFCu7Cuop

[Dial @DialAgent]

💳 @stripe × Dial Sponsor Prize:

🥇 TrueLift - multi-channel phone agents that recover renewal revenue (Stripe marketplace app)

🥈 Payment Validation Voice Agent - AI calls trusted numbers to verify

🥉 Bazaar - negotiate-to-buy SMS commerce. Out-haggle the AI shopkeeper.

[Dial @DialAgent]

🏆 Dial Main Prize winners:

🥇 Hermes — run your SEV-1 incident entirely BY VOICE. "Downgrade it." "Loop in Diego." "Escalate."

🥈 ViShield — vishing simulator for security teams

🥉 GuarDial — PagerDuty for your loved ones

[Dial @DialAgent]

@NVoitenkov Built on @DialAgent 😎

[Natan Voitenkov @NVoitenkov]

If you can't beat them - join them.

Kids are already spending the vast majority of their time on mobile devices, so are they still required to submit their homework - the old fashioned way?

Kesherola reimagines homework as a phone call - teachers design conversational missions across subjects, and kids complete them by talking it through.

Built on @DialAgent

[Natan Voitenkov @NVoitenkov]

Once a year, during the memorial for my grandfather, I am reminder of how few memories I have left of him.

Family memory graph (built on @DialAgent) - checkout this awesome demo by @somenick_name

[Natan Voitenkov @NVoitenkov]

Voice agents are everywhere, at a 100:1 ratio, it is going to get crazier - fast.

Decibel is a Continuous Integration (CI) for voice agents - testing them through real phone calls.

@cursorWhisperer x Snir 🦾
awesome built on @DialAgent

[Dial @DialAgent]

Warmest use of an outbound agent we have seen in awhile.

Kin calls a grandparent on a schedule and has a real conversation - no app, just a call they will answer - then turns each one into a family memory graph and nudges a relative with something specific. The no-app constraint is exactly right for the user it serves.

[Dial @DialAgent]

Defense Tech? Built with @DialAgent

Noam and Nir took their air-force experience and connected it to a phone number. If drones already fly, identify, and track on their own, why is a human still the bottleneck on the call? It was the most provocative build of the event.

Credit for the honesty in the README. The substance of this project is in the unique architecture decisions; wake-name detection on a live call, streaming the whole decision process to a map and transcript

[Dial @DialAgent]

@xxxxphUrban @NVoitenkov @JakeFleshner Same solution - not the same product

[Dial @DialAgent]

Travel tech by a father and his son - built on @DialAgent

Two repos working together - this receptionist plus a Claude calling extension - with 12 fake SF hotels in Postgres and MCP tools the agent calls mid-conversation to check availability, place a hold if needed and text a Stripe Checkout link.

Airlines had the hold option for awhile now, up to 48 hours when booking direct and sometimes even more if you book through an agent. Why not hotels? Well done for thinking about this feature.

[Dial @DialAgent]

100% up time and a 98/100 score by @SmitheryDotAI 🫡

[Dial @DialAgent]

Healthcare builders? we had those as well.
As someone who went through a laser surgery a few years back, I feel the pain first hand.

A smart clinical choice is baked right into the code: it administers the validated OSDI questionnaire (12 questions, scored 0-100), and the live clinician dashboard is deployed and linked; all via phone call.

PS - this can save time and money to ophthalmologist and patients.

[Natan Voitenkov @NVoitenkov]

(1/6) 5 practical lessons I learned from hosting @DialAgent 's hackathon last week.