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Foster (YC W21) — A better way to write

Community-powered writing workflow driven by some of the internet's best writers, editors, and experts.

Foster is a Y Combinator company in the Winter 2021 batch. Its directory entry describes it as: A better way to write. The founders listed are Stew Fortier (Founder), Dan Hunt (Founder) (Y Combinator directory entry, March 17, 2021).

Stew Fortier also founded Type ↓

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Foster

New accelerator entry · 2021-03-17 · the record

Winter 2021
batch
15
people
Early
stage
United States of America
region
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What the record says

BatchWinter 2021
Announced2021-03-17
StageEarly
StatusActive
Team size15
IndustryConsumer
Sub-industryConsumer -> Home and Personal
SectorsProductivity
RegionsUnited States of America, America / Canada, Remote, Fully Remote
BasedNew York City, NY, USA; New York, NY, USA; Remote
HiringNo
Sitehttps://foster.co
Founded2020
Previously known asCompound Writing

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The founders' other companies

  • Stew Fortier also founded Type

Also in YC Winter 2021

Same batch, Consumer first.

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In their words

Community-powered writing workflow driven by some of the internet's best writers, editors, and experts.

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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 Foster 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

    9 cited sources found

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If you're behind Foster: acceptance into a YC batch is one of the few weeks a young company gets looked up by people who matter — investors, other founders, press. FoxPlug turns the commits, deploys, and releases you're already making into that story automatically, so anyone who looks finds something current. GetFoxChat puts a guide on your own site so the people YC's own page just sent you don't read one line and leave.

Sourced from the company's Y Combinator directory entry, and from the company's own site, read directly on 2026-09-27 (foster.co).

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Foster: Accepted into Y Combinator Winter 2021
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Permanent URL: https://mentionfox.com/funding/yc-compound-writing
Last updated 2026-10-23
Primary record: Y Combinator directory entry
Foster (YC W21) — A better way to write. MentionFox, 2026-10-23. https://mentionfox.com/funding/yc-compound-writing