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With AI, Everyone is a Dev. EveryDev.ai © 2026
    1. Home
    2. Developers
    3. Upstream Labs, Inc.

    Upstream Labs, Inc.

    Making email fun again by building the first AI-native inbox designed for seamless collaboration between humans and AI agents.

    Visit Website

    At a Glance

    1Tool Listed
    1Product
    5Capabilities
    Discussions
    Paris, FranceHeadquarters
    2023Est.
    10Employees
    $3000000Raised
    Focus Areas
    Email Platforms
    Task Automation
    Team Collaboration
    Latest News
    Raised $3M Pre-seed led by Connect Ventures and YCJun 1, 2026
    Public Launch of AI-Native InboxJun 1, 2026
    Markets
    • Modern teams
    • AI-first companies

    AI Tools by Upstream Labs, Inc.

    (1)
    View Upstream
    Upstream tool icon

    Upstream

    AI Email Client for Gmail

    Email PlatformsTask AutomationTeam Collaboration

    Discussions

    No discussions yet

    Be the first to start a discussion about Upstream Labs, Inc.

    Latest News

    06/01/2026

    Raised $3M Pre-seed led by Connect Ventures and YC

    LinkedIn/Press
    06/01/2026

    Public Launch of AI-Native Inbox

    Product Hunt
    01/01/2023

    Accepted into Y Combinator S23

    YC Directory

    Products & Services

    1
    Upstream
    June 2026

    AI-native collaborative inbox with channels, threads, and agent integration.

    Market Position

    Collaborative AI-native email alternative to Superhuman, Front, and Shortwave.

    Leadership

    Founders

    LL

    Louis Lecat

    Founder & CEO. Previously VP Product at Algolia (2018-2023), leading product from Series A to Series D. Stanford graduate.

    JT

    Jonathan Tiret

    Founder & CTO. Previously Head of Engineering at Doctrine and Co-founder of online game Dino Gaia.

    Executive Team

    LL

    Louis Lecat

    Founder & CEO

    Ex-Algolia VP Product.

    JT

    Jonathan Tiret

    Founder & CTO

    Ex-Doctrine Engineering Lead.

    Board of Directors

    CV
    Connect Ventures
    Lead Investor
    YC
    Y Combinator
    Accelerator/Investor

    Founding Story

    Founded by veterans of Algolia and Doctrine to solve the collaboration friction in traditional email by creating a shared space for teams and AI agents.

    Business Model

    Revenue
    Estimated $168K - $212.5K ARR.

    Revenue Model

    SaaS Subscription (recurring fees).

    Pricing Tiers

    Early Access
    Not disclosed

    Full AI-native inbox features.

    Private

    Target Markets

    Industries & Segments
    • Modern teams
    • AI-first companies
    Use Cases
    • Professional services
    • Remote teams
    • AI-agent users
    Notable Customers
    • Early adopters in the YC ecosystem

    Quick Facts

    Headquarters
    Paris, France
    Founded
    2023
    Entity Type
    Inc.
    Employees
    10
    Total Funding
    $3,000,000
    Investors
    Connect Ventures, Y Combinator
    Office Locations
    Paris

    Funding History

    Pre-Seed$3,000,000
    June 2026
    Not disclosed valuation
    Connect Ventures
    Y Combinator

    History & Milestones

    June 2026

    Raised $3M Pre-seed funding and launched publicly.

    May 2024

    Hired Joseph Calvo as Founding Designer from Superhuman.

    2023

    Joined Y Combinator Summer 2023 (S23) batch.

    Key Capabilities

    5
    AI-native shared inbox
    Collaborative channels
    Threads and task tracking
    Automated summaries
    AI agent reply drafting

    Integrations & Partnerships

    Platform Integrations

    • Gmail
    • Outlook

    Key Partnerships

    Integrated with Gmail/Outlook

    Connect

    Website
    upstream.do

    AI Topics

    3

    Upstream Labs, Inc. focuses on these topics:

    Email Platforms(1)
    Task Automation(1)
    Team Collaboration(1)
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