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Char (YC S25) — The AI notepad that knows and works for you

Char is a daily notepad that finishes your todos for you. Type a checkbox, and an agent picks it up — researching, drafting, or scheduling on your behalf.

Char is a Y Combinator company in the Summer 2025 batch. Its directory entry describes it as: The AI notepad that knows and works for you. The founders listed are John Jeong (Founder/CEO), Deokhaeng Lee (Founder), Yujong Lee (Founder) (Y Combinator directory entry, August 16, 2025).

6 more companies from YC Summer 2025 ↓

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Char

New accelerator entry · 2025-08-16 · the record

Summer 2025
batch
3
people
Early
stage
South Korea
region
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What the record says

BatchSummer 2025
Announced2025-08-16
StageEarly
StatusActive
Team size3
IndustryB2B
Sub-industryB2B -> Productivity
SectorsSaaS, Productivity, Open Source, AI, AI Assistant
RegionsSouth Korea, East Asia, Remote, Fully Remote
BasedSeoul, Seoul, South Korea; Remote
HiringNo
Sitehttps://char.com
Previously known asHyprnote

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Also in YC Summer 2025

Same batch, B2B first.

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In their words

Char is a daily notepad that finishes your todos for you. Type a checkbox, and an agent picks it up — researching, drafting, or scheduling on your behalf. Stay in command. Char does the work.

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Example from a real report (our sample on Target): “Target eliminated approximately 1,800 corporate positions, with around 1,000 employees receiving layoff notices and the remainder accounted for by eliminating open roles.” Source: NBC News

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What the Full Report on Char 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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Sourced from the company's Y Combinator directory entry.

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Char: Accepted into Y Combinator Summer 2025
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Permanent URL: https://mentionfox.com/funding/yc-char
Last updated 2026-10-20
Primary record: Y Combinator directory entry
Char (YC S25) — The AI notepad that knows and works for you. MentionFox, 2026-10-20. https://mentionfox.com/funding/yc-char