Upstream

Oh man - a potentially valid contender to go up against my precious Shortwave email client?! Installing now! 👀

the "agents do the grunt work" angle is interesting because most AI email tools still make you manage the AI. curious how the triage actually works in practice, does the agent learn your priorities over time or is it more rule-based out of the box?

Looks interesting!
Another Lecat was the co-founder of Sparrow
Are you related?

HI @louislecat my question is, most tools that connect to slack and notion hit token limits or lag heavily when syncing large workspaces. how often does upstream index the connected apps for fresh context? such a great launch

I really enjoyed the UX for AI reply and integration with Granola. Congratulations on the launch

Great idea! How do you keep the agent activity from burying the messages I actually need to read myself?

@louislecat Congrats on the launch! The agent alongside you model is the right call, the inbox tools that have tried to fully automate away from the user have always hit a trust wall. The real design challenge is making the handoff between human and agent feel invisible. Curious how you're thinking about the moments where users want to override the agent without breaking the flow, that's where these products usually get complicated. Adding to my stack to test.

Great product!I've been using it for a few weeks and I find myself in my inbox more than usual!Great auto-complete and I've been using the label features a lot!

Late to the thread but loving what I'm reading — especially Jonathan and Louis confirming nothing goes out without approval. That's the right instinct.The follow-up I'd love your take on: how do you keep that approval step from becoming its own inbox grind? At high volume, approving every single draft can quietly recreate the exact load you're trying to remove. The teams I've watched do human-in-the-loop well tend to tier it — once the agent has earned trust, it auto-handles the truly low-stakes stuff ("got it, thanks") on its own, and reserves explicit approval for anything that actually commits you to something.Curious whether Upstream leans that way, or keeps a hard approve-everything line on principle? Either way — congrats on #1. 👏

The voice-matching per audience is what caught my eye — does it learn over time from how you edit the drafts, or is it mostly set from the initial analysis?

The open-loops part is the bit that stands out to me. Drafting replies is useful, but remembering what needs a follow-up is where email quietly taxes people every day. Curious whether those reminders are purely email-thread based or can pull from Calendar/Granola context too.

Simplicity in answering my emails that makes me almost enjoy answering them 👌

Congrats on the launch Upstream team! It’s the only product where I find myself hitting « send » most of the time without changing anything in the AI’s draft. It’s so much faster than having to prompt Claude Code or Codex, wait for it to find the thread, analyze, draft and answer, then re-write half of it manually

The human-agent inbox idea is interesting because email is full of half-finished work, not just messages. The key question for me is trust: when Upstream drafts replies or tracks open loops, does it explain why something matters and what context it used from connected tools before a human acts?

The right test for this category is not whether the draft sounds polished; it's whether the system makes handoff and review legible. For a small shop, knowing what the agent touched and what still needs a human is the difference between leverage and another inbox to supervise.

Congrats to the entire team for the launch! It looks really cool. 👏

Been using Upstream for a few months now and I can’t imagine going back to Gmail. The UX is so much better, and the inbox splits have made managing my emails so much easier

Total game changer. Congrats team for the launch!

Hey Product Hunt! 👋 Louis here, co-founder of Upstream.When I was at Algolia, I was drowning in 200 emails a day. I was never sure where to focus, and getting through my inbox took forever. I knew it didn’t have to be this way. Instead of creating a new messaging protocol, I bet on rethinking the tool everyone uses: email.We built the first email client where agents do real work alongside people. We designed Upstream to be easy to pick up and fun to use. 📥 Take the noise out of emailAgents automatically triage your inbox, separate signal from noise, and surface only what deserves your attention✍️ Every reply starts with a draftUpstream drafts replies for every conversation that needs one. It also changes your voice based on who you’re talking to and the context of the convo⏰ Never miss a follow-upAgents track open loops and remind you when needed, making sure important conversations don't fall through the cracks🔎 Ask anything about your workAI can instantly find information across your inbox and connected tools: receipts, meeting notes, introductions, decisions, conversations, and more🔗 Bring all your context into your inboxAgents use information from tools like Notion, Calendar, Drive, Granola, and other sources to produce better answers and drafts👉 As a special thank you to the Product Hunt community, you get one free month of Upstream Pro if you sign up at upstream.do and use the code PH26! 👈We are all so excited to hear what you think! Please do reply here and let me know Huge thanks to our hunter @garrytan for hunting us 🙏