Boston-based Lightmatter, which develops AI chips that use light signals rather than electrical signals for processing, announces $22M Series A-1 led by GV
Today, we're excited to announce the close … Tweets: @jordannovet : Alphabet's GV has invested in an interesting AI chip startup, Lightmatter. it's GV's second AI chip investment, the first was SambaNova https://www.cnbc.com/... Thanks: @mkakav
Context & Ripple Effects
Lightmatter's $22M Series A-1 comes a year after its $11M Series A led by Matrix Partners and Spark Capital, and lands just weeks after Boston rival Lightelligence raised a $10M seed from Baidu Ventures — two photonic AI chip startups now funded in the same city within the same month.
For lead investor GV, this is a second bet on alternative AI silicon: the firm's first was SambaNova, which later scaled into billion-dollar rounds and enterprise deployments like JPMorgan. The follow-on record since — an $80M Series B, a $154M Series C, and a $155M extension at a $1.2B valuation — shows how much capital this thesis ultimately absorbed.
First-order effects
- GV doubles down on photonic computing, adding Lightmatter alongside SambaNova as its second AI chip position, while Lightmatter converts its later $80M Series B runway into a multi-year R&D buffer beyond the original Matrix/Spark round.
Second-order effects
- Lightelligence, backed by Baidu Ventures, now competes for the same talent and follow-on capital in Boston's nascent photonic-computing cluster, raising the bar for whichever startup can show a working chip first.
Third-order effects
- If the funding cadence holds, photonics graduates from science project to a recognized branch of AI compute: Lightmatter went on to raise a $400M Series D at a $4.4B valuation in 2024, with GV holding across the whole climb — evidence that specialist silicon challengers can sustain venture-scale financing against incumbent GPU economics.
The trend: AI compute is diversifying beyond electrical-signal chips, with silicon photonics attracting progressively larger venture rounds as investors hedge against GPU-centric supply.