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Lightly (YC S21) — Help ML teams label the right data

When ML teams send their data to companies like Scale.ai for labeling, most can only afford to label 1% or less of their datasets. But today they don’t have a good way to pick which 1% to label.

Lightly is a Y Combinator company in the Summer 2021 batch. Its directory entry describes it as: Help ML teams label the right data. The founder listed is Igor Susmelj (Founder) (Y Combinator directory entry, August 19, 2021).

6 more companies from YC Summer 2021 ↓

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Lightly

New accelerator entry · 2021-08-19 · the record

Summer 2021
batch
5
people
Early
stage
Switzerland
region
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What the record says

BatchSummer 2021
Announced2021-08-19
StageEarly
StatusActive
Team size5
IndustryB2B
Sub-industryB2B -> Engineering, Product and Design
SectorsMachine Learning, Data Labeling
RegionsSwitzerland, Europe, Remote, Partly Remote
BasedZürich, ZH, Switzerland
HiringYes
Sitehttps://lightly.ai/
Founded2018
YC group partnerBrad Flora

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Also in YC Summer 2021

Same batch, B2B first.

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In their words

When ML teams send their data to companies like Scale.ai for labeling, most can only afford to label 1% or less of their datasets. But today they don’t have a good way to pick which 1% to label. We help them pick the best 1% of their data to label. By labeling the most representative data, they significantly improve model accuracy at the same cost.

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A Full Report on Lightly: verified, sourced, every claim cited, ready in a few minutes. See pricing.

What the Full Report on Lightly covers

  1. The Short Answer

  2. Which Company This Is

  3. What They Do, And How The Money Works

  4. Who Runs It, And How To Reach Them

  5. The Money: Funding, Valuation, Runway

  6. Who Pays Them, And Who They Are Up Against

  7. Warning Bells

  8. Sources

    1 cited source found

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Lightly: Accepted into Y Combinator Summer 2021
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Permanent URL: https://mentionfox.com/funding/yc-lightly
Last updated 2026-10-27
Primary record: Y Combinator directory entry
Lightly (YC S21) — Help ML teams label the right data. MentionFox, 2026-10-27. https://mentionfox.com/funding/yc-lightly