Startup profile · funding coverage
Inferact
Company behind vLLM — open-source LLM inference engine used by Meta, Google, and Character.ai in production.
Stage
seed
Status
private
Coverage
full
Why Inferact is interesting
One of largest seed rounds of 2026; explicit mission to fund vLLM OSS while building inference products.
Key facts
- Seed (2026): $150M at $800M valuation co-led by a16z and Lightspeed for vLLM commercialization — TechCrunch
- vLLM is the dominant open-source LLM inference engine used by Meta, Google, and Character.ai in production
Investors in our directory
Funds linked from Inferact's profile — open a fund page for stage focus and related deal articles.
Industries
AI & Machine Learning Infrastructure & Cloud Developer Tools
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Related funding articles
Venture Capital Tracker pieces that cover Inferact's financing or category context.
FAQs about Inferact
Funding context and why this company shows up in venture coverage.
Inferact is the company behind vLLM — the open-source LLM inference engine — and is building commercial inference products on top of it.
Andreessen Horowitz (see /fund/andreessen-horowitz), Lightspeed (/fund/lightspeed-venture-partners-nyc), Sequoia (/fund/sequoia), Altimeter (/fund/altimeter-capital), and Redpoint (/fund/redpoint-ventures) co-led the 2026 seed.
Inferact raised a $150M seed in 2026 at a reported $800M valuation — one of the largest seed rounds on record.
Inference cost and throughput are the bottleneck for production LLM apps; vLLM is the de facto OSS engine and Inferact aims to fund its development commercially.
Inferact remains private as of July 2026.
Last updated: 2026-07-24