Series Unknown Funded Artificial Intelligence Startups
The 50 most recent Series Unknown rounds in artificial intelligence closed between July 25 and August 27, 2025.
The 50 most recent Series Unknown rounds in artificial intelligence closed between July 25 and August 27, 2025. The classification covers any round where the stage was not publicly specified — bridge financings, strategic investments, and later raises where companies declined to assign a letter. Disclosed amounts span from $350K (ThinkLabs AI, Toronto) to $300M (Massed Compute), with nine companies reporting $30M or above and roughly a third of the rows carrying no dollar figure at all.
California and New York dominate US activity: San Francisco hosts Numerai, Splight Tech ($12M), and Greptile ($41M), while the New York area accounts for eight companies including AI Optics ($15M), Titan ($74M), Synthpop ($15M), and Alkymi. Outside the US, rounds closed in London (Traydstream, $11M; Glassbox), Toronto (Bittensor, $8M; ThinkLabs AI), Tel Aviv (Maverick Medical AI; Pzartech), Singapore (GAIB, $10M; Deagent AI), Stockholm (Greater Than, $1M), and Athens (StiQ, $24M).
Most recent rounds
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Frequently asked
What are the largest disclosed rounds in this dataset?
Massed Compute leads at $300M, followed by Restor3d ($104M, Durham NC), Matic ($77M, Mountain View), FiscalNote ($75M, Washington DC), and Titan ($74M, New York). All five closed between late July and late August 2025. Snappt ($50M, Los Angeles) and Greptile ($41M, San Francisco) round out the top seven disclosed raises.
How many of these rounds have undisclosed amounts?
17 of the 50 rows list no dollar figure. Companies withholding size include Numerai (San Francisco), Ursa Space Systems (Ithaca NY), Alkymi (New York), Oxford Dynamics (Harwell UK), and CoRover (Bengaluru). Because stage is also unspecified for all rows on this page, both key data points are simultaneously opaque for these companies.
Which cities appear most frequently in this set?
New York leads with eight companies — AI Optics, Revin AI, Titan, Alkymi, Synthpop, Harmonya, Model ML, and Beam Health. San Francisco follows with three (Numerai, Splight Tech, Greptile). Toronto and Tel Aviv each contribute two companies. Athens, Stockholm, Bengaluru, and Yerevan each appear once, reflecting a wider international spread than is typical for a single three-week window.
Which AI sub-sectors attracted the most Series Unknown capital in this window?
Healthcare AI is the most active cluster: Restor3d ($104M, surgical), Sleep.ai ($6M, sleep diagnostics), PediaMetrix ($2M, pediatrics), Maverick Medical AI, Beam Health ($2M), and JOGO Health ($2M) all closed rounds in this period. AI compute infrastructure also features heavily, anchored by Massed Compute's $300M raise and Latent AI's undisclosed round out of Princeton NJ.
How wide is the spread between the smallest and largest disclosed rounds here?
Disclosed amounts run from $350K (ThinkLabs AI, Toronto) to $300M (Massed Compute). Most disclosed rounds fall below $15M, but nine companies reported $30M or above — Tahoe Therapeutics, Labs, Greptile, Snappt, Titan, FiscalNote, Matic, Restor3d, and Massed Compute — pulling the upper tail well beyond what is typical for rounds of unspecified stage.
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