Finally, an inbox you'll look forward to. Agents sort your messages, draft your replies, and clear the grunt work behind the scenes, all in a client so well-crafted that email feels light, fast, fun.
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 email Agents automatically triage your inbox, separate signal from noise, and surface only what deserves your attention
✍️ Every reply starts with a draft Upstream 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-up Agents track open loops and remind you when needed, making sure important conversations don't fall through the cracks
🔎 Ask anything about your work AI can instantly find information across your inbox and connected tools: receipts, meeting notes, introductions, decisions, conversations, and more
🔗 Bring all your context into your inbox Agents 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 🙏
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. 👏
Upstream changed the way I looked at mails from something annoyingly and chaotic, to structured and organized @louislecat congrats on the launch, and great to see where you and the teamm took the product in the last month!
The human + agent inbox model is interesting - most tools treat agents as a bolt-on to an existing workflow, and it creates friction. Building the inbox around the assumption that agents will be first-class participants from day one is a different design choice. What's the biggest behavioural change you've seen in users when they start treating the AI as a teammate rather than a tool?
My new favourite email client. Insane how many times I’ve simply hit ‘send’ on a draft!
My new favourite email client. Insane how many times I’ve simply hit ‘send’ on an auto reply!
About Upstream on Product Hunt
“The inbox designed for humans and agents”
Upstream launched on Product Hunt on June 18th, 2026 and earned 477 upvotes and 206 comments, earning #1 Product of the Day. Finally, an inbox you'll look forward to. Agents sort your messages, draft your replies, and clear the grunt work behind the scenes, all in a client so well-crafted that email feels light, fast, fun.
Upstream was featured in Email (36.7k followers), Productivity (654.1k followers) and Artificial Intelligence (471.3k followers) on Product Hunt. Together, these topics include over 248k products, making this a competitive space to launch in.
Who hunted Upstream?
Upstream was hunted by Garry Tan. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Upstream stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Garry Tan
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 email
Agents automatically triage your inbox, separate signal from noise, and surface only what deserves your attention
✍️ Every reply starts with a draft
Upstream 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-up
Agents track open loops and remind you when needed, making sure important conversations don't fall through the cracks
🔎 Ask anything about your work
AI can instantly find information across your inbox and connected tools: receipts, meeting notes, introductions, decisions, conversations, and more
🔗 Bring all your context into your inbox
Agents 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 🙏