Funded Artificial Intelligence Startups in Boston
Across these 50 funded AI companies based in Boston, the largest disclosed round is Lightmatter’s $400M (Series D) on 2024-10-16, which dwarfs every other…
Across these 50 funded AI companies based in Boston, the largest disclosed round is Lightmatter’s $400M (Series D) on 2024-10-16, which dwarfs every other disclosed amount in the list. The next-highest disclosed rounds sit far lower: Caresyntax at $100M (2024-08-15) and Blitzy at $200M (2026-05-05) are notable exceptions, but neither approaches the $400M spike.
Temporal and stage patterns cluster. Rounds span 2024-05-13 (Monitaur) through 2026-06-29 (Baz), with a dense cluster in late 2025: multiple entries in November and December 2025 include OnCorps at $55M (2025-12-11), Neurable at $35M (2025-12-19), and 7AI at $130M (2025-12-04). Stage mix also skews toward classified rounds—only one entry is Pre-Seed on the earliest side (HYBRD at $500K on 2024-12-04), while several later deals sit in Seed through Series C.
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Frequently asked
What stands out most in deal size across this Boston AI list?
Lightmatter’s $400M (Series D) on 2024-10-16 is the only disclosed round in this view that is in the $400M range, and it materially exceeds the rest of the disclosed amounts. The next tier includes Blitzy’s $200M on 2026-05-05 and Caresyntax’s $100M on 2024-08-15.
How clustered are the rounds by time in the most recent portion of the list?
The most recent date shown is 2026-06-29 (Baz at $9M), and there is a tight run of late-June 2026 rounds including Nebulock ($25M on 2026-06-25) and BoolSi ($6M on 2026-06-18). Separately, late 2025 is another concentration window, with multiple high-disclosed rounds in November–December 2025 such as OnCorps ($55M on 2025-12-11) and 7AI ($130M on 2025-12-04).
Are there any notable outliers on the low end of disclosed funding?
HYBRD’s disclosed amount of $500K on 2024-12-04 (Pre-Seed) is the smallest disclosed round in this listing. It is far below the lowest $M-range rounds clustered around $2M–$6M (e.g., Biometry at $2M on 2025-12-19; BoolSi at $6M on 2026-06-18).
Does the stage labeling show a consistent mix, or are there clear exceptions?
Series Unknown appears repeatedly alongside named stages, including multiple large disclosed deals like SOPHiA GENETICS ($58M on 2026-06-16) and OnCorps ($55M on 2025-12-11). Meanwhile, very large disclosed rounds can appear at higher stated stages such as Lightmatter’s Series D ($400M on 2024-10-16) and CloudZero’s Series C ($56M on 2025-05-28).
How much of the list is missing disclosed amounts versus clearly stated dollar figures?
Several entries show 'undisclosed' funding amounts, including Cellular Intelligence (2026-05-11), Blitzy’s $200M counterpart is disclosed while others around it are not, and earlier examples include Hill Research (2026-04-10) and Indico Data (2025-10-28). That means the observable comparisons of 'largest' and 'smallest' rely only on rows with explicit disclosed amounts like Lightmatter ($400M) and HYBRD ($500K).
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