Photon
Category: AI Developer Tools
Open-source framework and managed platform (Spectrum) that lets developers run AI agents inside iMessage, WhatsApp, Telegram, SMS/RCS, email, voice, Slack and Discord. Photon was founded in 2025. The company is led by Daniel Tian. Based in San Francisco, United States. Team size: 1-10. Total funding raised: $4.5M. Latest round: Seed. Key investors include Gradient, A*, Vercel, HongShan (HSG), Z Fellows, Llama Ventures, Karman.
- Founded
- 2025
- Headquarters
- San Francisco, United States
- Team size
- 1-10
- Total funding
- $4.5M
Value proposition
Users do not want to install new apps, so Photon lets developers deliver AI agents through messaging apps people already use every day, via one unified API.
Products and solutions
Spectrum SDK/unified API (open source, MIT), extensible channel framework, CLI, observability suite (audit logs, message history, human-in-the-loop), managed hosted platform with 99.95% uptime, SOC 2 Type II and HIPAA compliance, native iMessage APIs (group chats, rich media, location sharing, generative iMessage mini apps, polls).
Unique value
Agent-native, multi-channel messaging layer with deep native iMessage features and automatic channel fallback, delivering under 1s edge latency. Open-source core with a compliant managed tier.
Target customer
Developers and companies building AI agents (consumer AI, fintech, insurance, healthcare, dating/social apps), from hobbyists to enterprises
Industries served
Consumer AI, Fintech, Insurance, Healthcare, Dating/Social, Mortgage/Lending, Sales
Technology advantage
Large open-source developer base: 40,000+ developer sign-ups, and open source accounts for 98% of usage. Edge-first delivery under 1s versus roughly 1.5-2.5s for typical CPaaS. Default iMessage layer for several agent frameworks. SOC 2 Type II and HIPAA compliance.
How they differentiate
Built specifically for AI agents rather than marketing or notification sends. Open-source framework with multi-channel abstraction and fallback. Supports rich native iMessage features such as mini apps, polls and location. Offers observability and human-in-the-loop controls.
Main competitors
Sendblue, Linq, LoopMessage (also Blooio)
Key partnerships
Vercel (Eve, ChatSDK), Nous Research (default iMessage layer for the Hermes agent), Tencent QClaw, NanoClaw, Mastra (official iMessage host), integrations with LangChain, Convex, Render, Railway, Telnyx
Notable customers
Corgi Insurance, Boardy, Ditto, Rho, Flip (Fliptexts), Slashy, Fae, Copperlane, Runner
Major milestones
Open-sourced the iMessage agent kit. Launched the managed paid platform in April 2026. Held an 'App Funeral' developer day in San Francisco on 2026-09-17 with Vercel, Stripe and OpenAI. Raised a $4.5M seed in October 2026.
Growth metrics
40,000+ developer sign-ups; revenue up 10x in 4 months; less than 3% churn; messaging volume up 5x in the last month; open source reaches millions of end users; roughly 4.6k GitHub stars.
Market positioning
Developer-first messaging infrastructure layer for the 'agents replace apps' shift, with ambitions to become an agent-to-agent (A2A) communication layer.
Geographic focus
Global developer market, US-centric (iMessage)
About Daniel Tian
Ex-The Presence Agent Researcher (2025); prior roles at The Offer Call and Silver Lake; UPenn M&T program (CS + Wharton), dropped out to found Photon; Z Fellow. Built an iMessage bot and open-sourced it to thousands of developers.
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Official website: https://photon.codes