The archive · Developer & Business Tools · Product decision · 2025-2026
Lilac bets idle enterprise GPUs become a spot market; YC S25, $1.5M seed
Brothers from AWS and Webflow open-source a GPU scheduler, then bet a marketplace can broker idle enterprise H100s at up to 90% off cloud prices.
Lilac
What the business is
Lilac sells flexible GPU contracts and an open-source scheduler that unifies on-prem and cloud GPUs into a single compute fabric for AI teams.
Starting capital：$1.5M seed raised in 2025 (per PitchBook data cited by Startuply)
How it started
Brothers Ryan (AWS cloud and networking) and Lucas (Webflow data platforms) Ewing watched data scientists hunt for GPUs across clouds and on-prem fleets; one team they talked to paid $7M a year for guaranteed GPU capacity and still ran out. They founded Lilac in 2025 and joined YC's Summer 2025 batch with an open-source scheduler.
What happened
Lilac released its open-source scheduler v0.1.0 at launch and raised a $1.5M seed in 2025. In August 2025, GPU-as-a-service provider BluSky AI signed a letter of intent for Lilac to resell its idle B200/H200/H100/A100 capacity, naming Lilac a preferred marketplace partner. By June 2026 Lilac had a hosted inference API routing requests to idle enterprise clusters, with pay-per-token pricing from $5.
How it ended up
Still active as of September 2026: a four-person San Francisco team, with the open-source scheduler, marketplace, and inference API live, and the business evolved to selling flexible GPU contracts and running operations software for GPU cloud providers.
Background
Lilac is a YC Summer 2025 startup founded by brothers Ryan and Lucas Ewing, infrastructure engineers from AWS and Webflow. Its original pitch: enterprise GPU clusters often sit idle at low utilization while other teams scramble for capacity, so Lilac would broker that spare compute as a spot market, letting owners monetize unused GPUs and renters buy at up to 90% below cloud list prices.
The wedge was pragmatic. Lilac first shipped a free, open-source scheduler that unifies on-prem and cloud GPUs into one fabric, solving the immediate pain of data scientists hunting for available hardware. The founders cited a team paying $7M a year for guaranteed GPU capacity that still ran out; the scheduler gave Lilac a reason to be installed inside an enterprise firewall before it ever asked that company to expose spare cycles.
Lilac raised a $1.5M seed in 2025 and signed its first anchor supply deal in August 2025: a letter of intent with GPU-as-a-service provider BluSky AI to resell idle B200/H200/H100/A100 capacity. By June 2026 it had a hosted inference API routing requests to idle enterprise clusters, available as a provider on Eden AI with pay-per-token pricing from $5.
By September 2026 the company had evolved from marketplace pitch to supply ownership: it sells flexible GPU contracts and runs the software layer - monitoring, bare-metal provisioning, managed Kubernetes and Slurm - for GPU cloud providers as their named operations partner. The bet remains that underused enterprise compute becomes a standard part of AI infrastructure.
What has to be true
- GPU scarcity is real but mismatched: clusters sit idle at low utilization while teams pay millions for guaranteed capacity, so brokering spare compute attacks a genuine inefficiency.
- The self-hosted scheduler is a plausible wedge: it solves internal GPU-hunting pain before asking a company to expose its spare capacity to strangers.
- The marketplace faces a chicken-and-egg problem - enterprises must trust Lilac with idle hardware - which is why the BluSky AI letter of intent was the early signal worth watching.
- Differentiation is thin against Run:ai, Vast.ai and hyperscaler spot markets, so success hinges on liquidity and execution rather than technology alone.
What can be applied
An open-source wedge can open enterprise doors, but a two-sided market only works if supply actually shows up; a copied scheduler is no moat, so marketplace liquidity is the whole bet.
Aftermath
As of September 2026, Lilac is active as a YC Summer 2025 company (four-person team in San Francisco). Its open-source scheduler remains the entry point, the BluSky AI partnership is the anchor supply-side signal, and since June 2026 its inference API has been available on Eden AI with open-weight models such as Kimi, MiniMax, GLM and Gemma. The company says its next steps are wider model coverage, better routing, and growing the distributed GPU network.
Sources
- Lilac: We sell GPUs (company page with launch post)
- BluSky AI Inc. and Lilac Sign Letter of Intent to Launch Strategic GPU Marketplace Partnership
- Lilac's GPU Marketplace Aims to Broker the Idle H100
- Lilac is Now on Eden AI
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