Twenty AI infrastructure deals in 2025 raised $3.23B — half of it in one Lambda round
Asked:new ai startup deals that offer cloud comute (like sandboxes) or ai inference launched last year
A researched shortlist of 20 funding events across 18 startups announced or reported during calendar 2025, in three lanes: GPU / AI cloud compute ($2.394B across 5 deals), AI inference and model serving ($713.0M across 9), and cloud sandboxes / agent runtimes ($119.1M across 6). Amounts are stated USD; Lambda's "over $1.5B" is counted as $1.5B, so the total is a floor.
Every 2025 deal on the calendar — bubble area is amount, vertical axis is log-scaled dollars
GPU / AI cloud compute
AI inference / model serving
Cloud sandboxes / agent runtimes
The three lanes
GPU / AI cloud compute
$2.394B
5 deals · biggest: Lambda over $1.5B (Nov). Raw GPU capacity took 74% of the disclosed dollars.
AI inference / model serving
$713.0M
9 deals · biggest: Fireworks AI $250M Series C. The most crowded lane, from $16M seeds to $250M growth rounds.
Cloud sandboxes / agent runtimes
$119.1M
6 deals · biggest: Browserbase $40M Series B. E2B's $21M Series A is the clearest sandbox analogue.
What the picture cannot say alone
Lambda raised twice in 2025 — $480M in February and over $1.5B in November — nearly $2B, or 61% of the whole shortlist.
businesswire.comBaseten also raised twice: $75M in February from IVP and Spark, then a $150M Series D from BOND in September.
eprnews.comE2B, the clearest "sandbox" match to the brief, raised a $21M Series A from Insight Partners for open-source cloud sandboxes for AI agents.
siliconangle.comThe sandbox / agent-runtime lane is young: five of its six rounds are $22M or under, and the deals cluster in the second half of the year.
venturebeat.com
All 20 deals
| Company | Date | Amount | Stage | Category | Named investors | Source |
|---|
Researched shortlist, not an exhaustive census: a discovery pass searched 1,477 unique web pages from eight diverse queries and extracted 465 candidate mentions before curation to 20 unique 2025 funding events across 18 companies. Dates are announcement dates where supported, otherwise the date of the linked 2025 report; the Together AI and Browserbase rows use report dates. Amounts are stated USD; Lambda's "over $1.5B" is counted as $1.5B, so totals are floors. Blank stages and investors are preserved, not inferred. Exact duplicate source rows for Together AI and Browserbase were removed.