s2.dev YCアプリケーション

Fall 2025Active

s2.devはFall 2025バッチでB2B企業としてY Combinatorを卒業しました。以下：会社の事業内容、創業者、そして実際のYCフォームで質問ごとに再構築されたYCへの応募内容。

YCバッチ: Fall 2025
業界: B2BInfrastructure
チーム規模: 5
ステータス: Active
ローンチ済み: 2025

創業者

Shikhar BhushanCo-founder and CEO
Stephen BaloghCo-founder and CTO
Dwarak Govind ParthibanCo-founder

s2.devの事業内容

S2 is an API for durable streams. We make working with streaming data dead simple and reliable. The more we worked on data systems, the more we felt like there was a missing building block. The seamless experience of object storage simply did not exist for durable streams - so we set out to fix that! S2 reimagines streams as an unlimited and access-controlled web resource. Like if Kafka and S3 had a baby. - Building agents? Use granular streams to persist context in real time, make workflows auditable, and coordinate between agents. - Publishing fast-moving data? Streams support high fanout and can be accessed directly over the internet, so they are a great fit for broadcasting real-time feeds. - Sandboxing? Emit to per-instance streams, and read history or live events just as easily. - Local-first and multiplayer experiences? Propagate updates reliably and efficiently. Stop dealing with clusters, and start streaming.

s2.devのYCアプリケーション、再構築済み

Y Combinator 申請

s2.dev 様、Fall 2025 バッチ。公開データから回答された、実際のフォームの質問。

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

s2.dev

Describe what your company does in 50 characters or less.

API for unlimited, durable, real-time streams

What is your company going to make? Please describe your product and what it does or will do.

We built s2.dev to be an API that treats streams like durable, unlimited web resources. You can think of it as if Kafka and S3 had a baby. It makes streaming data easy, reliable, and accessible via the internet without managing clusters. Our product lets developers persist real-time context, coordinate workflows, and broadcast live data with high fanout. It's designed for teams building agents, real-time publishing, sandboxing, or multiplayer/local-first apps.

Where do you live now, and where would the company be based after YC?

We live in San Francisco, CA, and plan to keep the company based here after YC.

Explain your decision regarding location.

We picked San Francisco because it's where we live and where much of our early user base and engineering talent are. Staying local keeps us close to necessary resources and partners.

フルアプリケーションで21件の追加回答

はフルバージョンにあります。無料アカウントを作成して、他のすべてのYCバッチの横にあるYCインサイトで開いてください。

申請内容全体を見る

よくある質問

s2.devの実際のYCアプリケーションですか？

いいえ。Y Combinatorは提出されたアプリケーションを非公開にしています。これは再構築されたものです。実際のYCフォームの質問に、s2.devの公開データ（ローンチノート、創業者経歴、製品説明）から回答しています。s2.devのような会社がYCにどのようにアピールするかを示しており、彼らが提出したテキストではありません。