Photon
Spectrum SDK — deploy AI agents over iMessage, WhatsApp, Telegram, SMS-RCS, email and voice
Photon (photon.codes) builds infrastructure for messaging-native AI agents. Its Spectrum SDK lets developers run agents on the channels users already use — iMessage, WhatsApp, Telegram, SMS-RCS, email and voice — rather than inside standalone mobile apps. The company held a public "funeral for mobile apps" stunt in San Francisco before announcing a $4.5M seed co-led by Gradient and A*, with Vercel, HongShan, Z Fellows, Llama Ventures, Karman Ventures and angels participating. Founded by Daniel Tian and Ryan Zhu and based in San Francisco. Not to be confused with Exein's Photon runtime, ANELLO Photonics, or Volantis photonics companies.
AI
📍 San Francisco, CA
Current Valuation
Private
PRIVATE
IPO Outlookprivate
Is Photon going public?
No. Photon is private and has not filed to go public. There is no S-1 on file.
What is Photon's valuation in 2026?
No confirmed valuation is on record for Photon. The roster shows funding and investors where they are public; it does not estimate a mark.
Has Photon filed an S-1?
No public S-1 is on file for Photon.
Who are Photon's investors?
Photon's investors include Gradient, A*, Vercel, HongShan, Z Fellows, Llama Ventures and 1 more.
How much has Photon raised?
Photon has raised $4.5M in total across 1 disclosed round, most recently a Seed of $4.5M in Oct 2026.
Is Photon publicly traded — can you buy Photon stock?
No. Photon is a private company — its shares are not listed on any exchange and there is no ticker. The routes to exposure are pre-IPO secondary marketplaces and funds (accredited investors), employee tender offers when the company runs one, and public companies with read-through exposure. QuantLogix maps every route it can verify for Photon on its Pre-IPO Access Desk.
Answers are derived from the roster record shown on this page — filing status, last round and confirmed marks. Where the record is silent, the answer says so rather than guessing.
Company Profile
Last Round
Seed — $4.5M (Oct 2026) · Lead: Gradient and A* (co-leads)
Fundraising Status
Seed · $4.5M · this month
privateTotal raised $4.5M1 disclosed rounds
Funding History
| Round | Amount | Date | Lead Investor | Post-Money |
|---|
| Seed | $4.5M | Oct 2026 | Gradient and A* (co-leads) | — |
Vertical Intelligence — AI / ML
AI / ML registry data for Photon has not been collected yet — the weekly vertical sweep hasn't reached this company. Check back soon.
Talent Signal
Hiring data for Photon has not been collected yet — the monthly talent sweep hasn't reached this company. Check back soon.
Investors
Gradient · A* · Vercel · HongShan · Z Fellows · Llama Ventures · Karman Ventures
Products
- Spectrum SDK — agents over iMessage, WhatsApp, Telegram, SMS-RCS, email and voice
AIAgentsMessagingiMessageWhatsAppDeveloper ToolsSeedRecently Funded
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of recent date. Refreshed quarterly.