July 17, 2026

Happy Friday Photon Community,

This week at Photon: we shipped auto-scaling and load balancing for iMessage lines, launched live mini app cards that update in place right inside the transcript, built the most brainrot 67 game on iMessage, and we're taking over SF for YC Startup School with Convex and a GoKart Rally across the city.

Feature Updates

Auto-Scaling and Load Balancing for iMessage

Your iMessage lines now scale and route themselves, so you no longer have to guess at capacity before a launch.

• Every sampling cycle checks active user count, inbound growth rate, and line health: delivery success, queue depth, and response latency

• New lines are provisioned within seconds when an existing one nears its cap, before deliverability takes a hit

• One call to /lines/route returns the healthiest line, with an isBestAvailable flag so you know if it's a real pick or a fallback

Details on X

Feature Updates

Mini apps now render live, interactive UI right inside the iMessage transcript, no sheet required.

Mini apps can now render live, interactive UI right inside the iMessage transcript: no tap, no sheet, the card is the app.

• Set the live flag to true in app() and Spectrum renders it inline via Apple's MSMessageLiveLayout, right in the chat bubble

• Multiple live cards from different apps can run in the same transcript at once, each with its own view controller

• Cards update in place with a miniAppCardSession, so a payment card can flip to "Paid" without a new bubble

• Falls back automatically to a tappable URL on SMS, Android, and older devices, so one app() call covers every platform

Details on X

Community Highlights

Agentic Builders Night at Convex

We're joining Convex on July 23rd for a night of talks from agentic builders.

• Topics: how to build AI-native applications, from coding agents to autonomous agents, from iMessage-native agents to reactive backends

• Come and talk to our team at the event!

Sign Up on Luma

Community Highlights

GoCar Rally at YC Startup School

Join us on July 24th as we take over San Francisco with a GoCar rally from Fisherman's Wharf to Chinatown during YC Startup School week.

• Highlights: We are invited Founders to go on a Photogenic trip with a convoy of 40 yellow GoCars, photo stops at iconic SF landmarks, and a finish line hangout with drinks and merch in Fisherman's Wharf

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Community Highlights

The 67 Challenge

Our marketing team built the most brainrot game on iMessage, counting from 1 to 67 by text.

• Text 67.photon.codes to start your run

• Fastest run to 67 wins $500

• Try if you could beat the current leaderboard

Details on X

We're Hiring

Backend Engineers (Intern + Fulltime)

Proficient in Swift, TypeScript (NodeJS, ConnectRPC, Hono), or Rust. Strong understanding of how production-level backend systems work, including OTel, Workflow Systems, Outbox, PostgreSQL, Service Mesh, and k8s.

Contact Us On X

That's all for this week.

We believe agents should reach everyone:
And we're building every day to make it happen.

Want to learn more about Photon?
Reply to this email or grab time with us for a quick chat.

Photon is building the Twilio for AI agents - enabling agents to live inside existing messaging surfaces like iMessage, phone calls, email, WhatsApp, Instagram, Slack, and more. Our open-source kits have driven 200k+ impressions and adoption from thousands of developers.

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