YCS23· AIUpstream
The first inbox designed for humans and agents
Founders
Not read from YC yet; the weekly run fills these in.
Same space
Competitors
Closest in what they build, same category.
Adjacent
Overlapping tags, a different niche.
Post.fmS10New email inbox.Shared: inboxInactive
MagicBellW21The notification inbox for web/mobile applications.Shared: inbox, designedActive
GliderW12We filter distracting emails away from your inbox.Shared: inboxInactive
OrchidX25A personal EA in your iMessageShared: replie, draft, meetingActive
AcunoteW11Active
Also from S23 in AI
Batchmates in Summer 2023.
AccendS23AI agents for commercial underwriting at banks and fintechsActive
AgentCollectS23B2B debt collection powered by AI agentsActive
AglideS23Connect every disconnected app to your SSO.Active
AirgoodsS23The modern distributor for grocers.Active
AiSDRS23AI that finds the right buyers and books sales meetingsActive
AlgunaS23AI-Native CPQ & Billing for Modern Pricing ModelsActive
About Upstream
Your inbox, handled for you. Upstream's agents sort the noise, draft replies in your exact voice, follow up at the right time, and do what you ask - like finding receipts or scheduling meetings - so you can fly through your inbox and have fun doing it.
Paris, Île-de-France, France
Upstream: questions
Which YC batch was Upstream in?
Upstream was in Y Combinator's Summer 2023 batch (S23).
Is Upstream still active?
Y Combinator lists Upstream as active.
Where is Upstream based?
Upstream lists Paris, Île-de-France, France as its location on YC's directory.
Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.