Upstream - The first inbox designed for humans and agents
Your inbox, handled for you. Agents sort the noise, draft replies in your voice, and follow up automatically.
Details
- External ID
- 103613
- Source
- YC
- Company
- Upstream
- Product
- Upstream - The first inbox designed for humans and agents
- Website domain
- upstream.do
- Launched
- June 22, 2026
- Cohort
- Summer 2023
- Upvotes
- 11
- Upvotes percentile
- 0.42857142857142855
- Tags
- —
- Fetched at
- Oct. 1, 2026, 1 a.m.
- Updated at
- Oct. 1, 2026, 1 a.m.
Enrichment
- Theme
- AI email agents and deliverability
- Vertical
- Horizontal
- Function
- Agent / copilot
- Audience
- B2B
- AI stance
- AI-native
- Project type
- Commercial product
- Normalized one-liner
- email management with ai agents
- Manually corrected
- False
Could you build this?
Yes Upstream is an email client that uses LLMs to triage messages, generate drafts in the user's voice, and schedule follow-ups, which is a classic API wrapper project straightforward to build with modern web frameworks.
Competitors
Other products that read as similar to this one — 13 launches clear the similarity bar, closest 8 shown.
Attention rank: #9 of 14 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 100 days after the earliest competitor.
- Upstream · ph · 2026-06-18 · 976 upvotes · similarity 0.77
- Robin · ph · 2026-09-27 · 9 upvotes · similarity 0.37
- InboxIQ · ph · 2026-09-18 · 1 upvotes · similarity 0.37
- Inbox-pilot · github · 2026-09-29 · 20 upvotes · similarity 0.34
- Inboxx.ai · ph · 2026-09-24 · 1 upvotes · similarity 0.33
- Tutti · ph · 2026-09-30 · 2 upvotes · similarity 0.32
- AgentMail · ph · 2026-04-09 · 274 upvotes · similarity 0.32
- RecoverFlow · ph · 2026-09-16 · 1 upvotes · similarity 0.32
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a agent / copilot tool for Agriculture yet.