Top Startup and Tech Funding News – September 4, 2025

It’s Thursday, September 4, 2025, and we’re back with today’s top startup and tech funding news from the U.S. and across the globe. From billion-dollar AI battles in Paris to AI-driven logistics, fintech, and proptech bets, the day’s financings highlight how investors are leaning into both heavy-capitalized scale plays and nimble early-stage experiments.

Capital is flowing into startups tackling supply chain automation, regulatory compliance in life sciences, AI-powered search infrastructure, and next-gen nicotine alternatives—while education, real estate, and B2B sales startups are drawing lean seed checks to prove their models. Mega-rounds like Mistral’s reported €2 billion raise sit alongside strategic corporate investments from Nasdaq and Citi, underscoring how conviction capital remains active across sectors and stages.

Funding Highlights

Augment secured $85 million Series A to automate end-to-end freight workflows, while You.com pulled in a $150 million Series C to grow its enterprise AI platform. In Europe, Mistral AI is finalizing a massive €2 billion round that would value it at $14 billion, cementing its role as a major AI contender. On the seed front, Supersonik raised $5 million to reinvent SaaS demos, MagicDoor grabbed $4.5 million to automate property management, and Throxy landed $6.2 million to scale B2B outbound sales.

Investor Activity

Top-tier venture firms and corporate investors were active across the board. Redpoint Ventures led Augment’s $85 million raise, Cox Enterprises drove You.com’s $150 million, and Andreessen Horowitz backed Supersonik’s $5 million seed. Strategic arms also leaned in—Nasdaq Ventures invested in Juniper Square to boost private markets tech, while Citi Ventures backed fintech Spinwheel. Europe saw major institutional players line up behind Mistral, a sign of deepening global competition in AI infrastructure.

Together, today’s financings show a split-screen view of the market: massive bets on AI platforms and healthtech infrastructure at one end, and scrappy early-stage startups pushing into education, real estate, and sales automation at the other.

Here’s the full rundown:

Augment Raises $85M in Series A Funding to Automate Logistics with AI

Augment, an AI logistics startup led by Deliverr co-founder Harish Abbott, has raised $85 million Series A round to expand “Augie,” its AI teammate for freight shippers, brokers, and carriers. The San Francisco-based company’s platform automates tedious logistics workflows – from gathering shipping bids and tracking loads to building freight schedules and collecting invoices – essentially acting as a personal assistant in the supply chain.

The new funding, led by Redpoint Ventures with participation from 8VC, Shopify Ventures, Autotech Ventures, and others, comes just five months after Augment’s $25 million seed round and will fuel aggressive hiring and product development as the startup scales Augie across the end-to-end freight process.

Funding Details:

• Startup: Augment

• Investors: Redpoint Ventures (lead), 8VC, Shopify Ventures, Autotech Ventures, others

• Amount Raised: $85 million

• Total Raised: $110 million

• Funding Stage: Series A

• Funding Date: Sept 4, 2025

Edumentors Raises $2M in Seed Funding to Build AI Tutoring Platform

Edumentors, a London-based online tutoring startup, raised $2 million in seed funding to develop an AI-powered tutoring tool that complements its network of human tutors. The capital, led by Abu Dhabi’s Magna Investments with participation from angel investors, will fund the creation of “Edu AI,” a virtual tutor product that uses features like interactive whiteboards and visual feedback to emulate a real-life teaching experience.

In addition to building out its AI capabilities, Edumentors will use the seed round to enhance its existing platform, which has already facilitated over 100,000 lesson sessions globally, combining live university student tutors with AI assistance to make personalized education more scalable and effective.

Funding Details:

• Startup: Edumentors

• Investors: Magna Investments (lead), angel investors

• Amount Raised: $2 million

• Total Raised: $2 million

• Funding Stage: Seed

• Funding Date: Sept 4, 2025

Boost My School Raises $10M in Funding to Modernize K-12 Fundraising

Boost My School, an edtech startup transforming how K-12 schools raise money, secured $10 million in fresh funding to expand its all-in-one fundraising platform. The New York-based company, founded by Holman Gao after he experienced cumbersome school fundraisers at his alma mater, provides schools with a modern toolkit to manage donations, alumni campaigns, auctions, and events in one place.

The round was led by venture studio High Alpha with participation from Far Out VC, Ground Game Ventures, Allos Ventures, and angel investor Scot Chisholm (founder of Classy). Boost My School plans to use the infusion to grow its team and enhance its platform’s features as more independent and faith-based schools (over 200 and counting) adopt the software to double their fundraising outcomes and engage donors more effectively.

Funding Details:

• Startup: Boost My School

• Investors: High Alpha (lead), Far Out VC, Ground Game Ventures, Allos Ventures, Scot Chisholm (angel)

• Amount Raised: $10 million

• Total Raised: $10 million

• Funding Stage: Not disclosed

• Funding Date: Sept 4, 2025

Sesh+ Snags $40M in Funding to Scale Tobacco-Free Nicotine Pouches

Sesh+, an Austin, Texas-based startup offering premium tobacco-free nicotine pouches, announced it has raised over $40 million in total funding to fuel production growth and national distribution. The latest financing was led by tech investment firm 8VC and entrepreneur Troy Link (CEO of Jack Link’s), with participation from Electric Feel Ventures and a roster of strategic backers spanning entertainment, retail, and manufacturing.

Founded in 2020 by CEO Max Cunningham, Sesh+ has quickly grown into one of the fastest-growing nicotine pouch brands in the U.S., landing its products in major convenience retailers like Buc-ee’s, Sheetz, and Circle K. With celebrity investors such as music artists Post Malone and Diplo also on board, Sesh+ will use the new capital to innovate on its patented, pH-balanced nicotine formulations and meet surging consumer demand for smoke-free, spit-free alternatives to traditional tobacco.

Funding Details:

• Startup: Sesh+

• Investors: 8VC (lead), Troy Link, Electric Feel Ventures, strategic investors including Post Malone and Diplo

• Amount Raised: $40 million

• Total Raised: $40+ million

• Funding Stage: Not disclosed

• Funding Date: Sept 4, 2025

MagicDoor Lands $4.5M in Seed Funding to Put Property Management on Autopilot

MagicDoor, a Las Vegas-based proptech startup, raised a $4.5 million seed round to advance its AI-driven property management platform for independent landlords. The oversubscribed financing was co-led by Okapi Venture Capital and Shadow Ventures, with additional support from Motley Fool Ventures, VITALIZE Venture Capital, and Early Light Ventures.

Founded in late 2024 by CEO Kasper Søgaard, MagicDoor’s “AI that never sleeps” helps small property owners automate tasks usually done by property managers – listing vacancies, collecting rent, dispatching maintenance, and communicating with tenants – all through a unified intelligent assistant. With triple-digit monthly growth since launch and reports of fivefold productivity boosts for early users,

MagicDoor plans to invest the new funds in product development and hiring as it integrates the latest AI models and expands its platform to meet growing demand.

Funding Details:

• Startup: MagicDoor

• Investors: Okapi Venture Capital (co-lead), Shadow Ventures (co-lead), Motley Fool Ventures, VITALIZE VC, Early Light Ventures

• Amount Raised: $4.5 million

• Total Raised: $4.5 million

• Funding Stage: Seed

• Funding Date: Sept 3, 2025

Ketryx Secures $39M in Series B Funding to Accelerate AI Compliance in Life Sciences

Ketryx, a Boston-based startup providing AI-powered compliance infrastructure for life sciences companies, has closed a $39 million Series B round to scale its platform. The funding was led by Transformation Capital and joined by existing investors, including Lightspeed Venture Partners, MIT’s E14 Fund, Ubiquity Ventures, and 53 Stations.

Ketryx’s software helps major medtech and biotech organizations safely integrate AI into regulated workflows by automating documentation and validation processes – an approach that has delivered up to 90% reductions in documentation time and significantly faster product release cycles for its clients.

This new investment brings Ketryx’s total financing to over $55 million and will be used to expand the team (in both its U.S. headquarters and European office) and enhance the platform’s capabilities, as the company supports a growing roster of top-tier medical device and pharmaceutical customers navigating complex FDA and EU regulations.

Funding Details:

• Startup: Ketryx

• Investors: Transformation Capital (lead), Lightspeed Venture Partners, MIT E14 Fund, Ubiquity Ventures, 53 Stations

• Amount Raised: $39 million

• Total Raised: $55+ million

• Funding Stage: Series B

• Funding Date: Sept 4, 2025

You.com Raises $150M in Series C Funding to Expand AI Search Services

You.com, an AI startup founded by former Salesforce chief scientist Richard Socher, has raised $150 million in a Series C round that values the company at about $1.5 billion. The funding was led by Cox Enterprises and included returning investors Georgian, Norwest Venture Partners, and Salesforce Ventures.

Founded in 2020 and originally launched as an AI-powered consumer search engine, You.com has since pivoted toward enterprise AI services – offering a suite of APIs that allow companies to build custom AI chatbots and search applications on top of You.com’s technology.

The platform, which handles over 1 billion queries per month for clients like DuckDuckGo and Databricks, plans to use the new capital to double its 100-person team, open a San Francisco office, and develop new products that position You.com as a go-to AI infrastructure provider for businesses.

Funding Details:

• Startup: You.com

• Investors: Cox Enterprises (lead), Georgian, Norwest, Salesforce Ventures

• Amount Raised: $150 million

• Total Raised: Not disclosed

• Funding Stage: Series C

• Funding Date: Sept 4, 2025

Mistral AI Finalizing €2B Funding Round at $14B Valuation to Scale AI in Europe

Paris-based Mistral AI is reportedly in the final stages of securing a colossal €2 billion (~$2.2 billion) funding round that would value the company at around $14 billion. Founded in 2023 by former DeepMind and Meta researchers, Mistral has quickly risen to prominence with its open-source large language models and its flagship chatbot “Le Chat” tailored for European users.

This new investment – a massive leap from Mistral’s €5.8 billion valuation in mid-2024 – reflects surging investor confidence in European AI startups and would make Mistral one of Europe’s most valuable tech companies. While the names of the new backers have not been officially disclosed, the company has previously attracted over €1 billion from top U.S. venture firms like Andreessen Horowitz and General Catalyst.

Once finalized, the funding will arm Mistral AI with significant capital to hire talent and ramp up development of its AI models, bolstering Europe’s position in the global AI race.

Funding Details:

• Startup: Mistral AI

• Investors: (New investors not yet disclosed; previously backed by Andreessen Horowitz, General Catalyst)

• Amount Raised: €2 billion (planned)

• Total Raised: €3+ billion (estimated)

• Funding Stage: Late-stage (unconfirmed)

• Funding Date: Sept 4, 2025 (reportedly)

Supersonik Launches with $5M in Seed Funding to Transform SaaS Sales Demos

Supersonik emerged from stealth with a $5 million seed round led by Andreessen Horowitz to revolutionize how software companies give product demos. The San Francisco- and Barcelona-based startup has built an autonomous AI sales agent that can instantly join live video calls and present a personalized, interactive demo of a software product in any language.

By integrating with real product instances, CRM data, and knowledge bases, Supersonik’s AI adapts on the fly to each prospect’s needs – effectively acting like a veteran sales engineer who’s available 24/7. Alongside lead investor A16Z, the seed round included strategic angels from Google, DeepMind, and Salesforce.

Supersonik, founded by Daniel Carmona Serrat, Joaquim Lechà (former Typeform CEO), and Pol Ruiz, plans to use the funds to expand its team and extend its real-time demo platform beyond sales, into customer onboarding, support, and training use cases.

Funding Details:

• Startup: Supersonik

• Investors: Andreessen Horowitz (lead), notable angels from Google, DeepMind, Salesforce

• Amount Raised: $5 million

• Total Raised: $5 million

• Funding Stage: Seed

• Funding Date: Sept 4, 2025

Spinwheel Gets Backing from Citi Ventures to Grow AI Credit Platform

Spinwheel, an Oakland, CA-based fintech startup, has received a strategic investment from Citi Ventures (the venture capital arm of Citigroup) to advance its AI-powered credit data and payments platform. The deal’s amount wasn’t disclosed, but it will support Spinwheel’s mission to simplify consumer debt management by integrating real-time credit information and payment tools into banking apps and lending platforms.

Led by co-founder and CEO Tomás Campos, Spinwheel partners with financial institutions and personal finance apps to provide instant access to verified credit data and to streamline loan payoff and bill payment processes via a simple API. With Citi Ventures now on board as an investor and advisor, Spinwheel will accelerate its go-to-market efforts, expand its “agentic AI” capabilities for credit automation, and tailor its product for large financial enterprises looking to modernize consumer debt workflows.

Funding Details:

• Startup: Spinwheel

• Investors: Citi Ventures (strategic investor)

• Amount Raised: Not disclosed

• Total Raised: Not disclosed

• Funding Stage: Strategic investment

• Funding Date: Sept 4, 2025

Throxy Raises $6.2M in Seed Funding to Supercharge B2B Outbound Sales

Throxy, a London-based startup that serves as an “outbound growth partner” for B2B companies, has raised a $6.2 million seed round to scale its tech-enabled sales prospecting service. The funding was led by Base10 Partners with participation from Y Combinator, following Throxy’s graduation from YC’s Spring 2025 cohort.

Founded in 2023 by Pablo Jiménez de Parga Ramos, Bergen Merey, and Arnau Ayerbe, Throxy handles the entire outbound sales development process for clients targeting traditional industries with hard-to-reach customers. The company’s platform identifies ideal prospects, crafts personalized outreach that avoids spam filters, manages lead replies, and sets up high-value meetings for its clients’ sales teams.

With this new capital, Throxy plans to expand its team nearly fivefold and broaden its client base across manufacturing, education, healthcare, and other sectors, helping more businesses fill their sales pipelines through AI-assisted, tailored outreach.

Funding Details:

• Startup: Throxy

• Investors: Base10 Partners (lead), Y Combinator

• Amount Raised: $6.2 million

• Total Raised: $6.2 million

• Funding Stage: Seed

• Funding Date: Sept 4, 2025

Fiveonefour Picks Up $17M in Funding to Advance AI Developer Tools

Fiveonefour, a Portland, OR-based startup specializing in data analytics tools for developers, announced it has raised $17 million in total funding to accelerate its roadmap. The company did not disclose the investors behind the round. Fiveonefour provides a developer toolkit – including its open-source “Moose Stack” and Sloan AI agent framework – that helps engineering teams add powerful analytics and real-time data processing capabilities into their applications.

Led by CEO Tim Delisle, the startup’s platform integrates with popular technologies like ClickHouse, Kafka, and Redis to enable both human developers and AI-driven systems (“agentic” developers) to leverage large-scale, low-latency data in their products. With the new funding, Fiveonefour will focus on expanding support for enterprise customers, strengthening technical partnerships, and growing its open-source community, all aimed at making sophisticated data infrastructure more accessible to software teams.

Funding Details:

• Startup: Fiveonefour

• Investors: Not disclosed

• Amount Raised: $17 million

• Total Raised: $17 million

• Funding Stage: Not disclosed

• Funding Date: Sept 4, 2025

Juniper Square Gets Nasdaq Investment to Boost Private Markets Tech

San Francisco-based fintech startup Juniper Square has received a strategic investment from Nasdaq Ventures to drive further innovation in its private markets platform. (No external links or source names) The terms of the deal were not disclosed, but it forges a partnership between Juniper Square and the global stock exchange operator to collaborate on data and liquidity solutions for private fund managers.

Juniper Square’s software is used by over 2,000 investment firms to manage $1 trillion+ in capital across 40,000 funds, simplifying everything from fundraising and investor onboarding to fund accounting and investor reporting. With Nasdaq’s backing, Juniper Square will accelerate development of new tools – including potential secondary market capabilities – to help general partners (GPs) and limited partners (LPs) manage alternative assets more efficiently and transparently.

Funding Details:

• Startup: Juniper Square

• Investors: Nasdaq Ventures (strategic investor)

• Amount Raised: Not disclosed

• Total Raised: Not disclosed

• Funding Stage: Strategic investment

• Funding Date: Sept 4, 2025

Ortivity Receives €200M in Funding to Expand German Healthtech Platform

Ortivity, a Munich-based healthtech startup focused on outpatient orthopedic care, has raised €200 million (approximately $215 million) in a new funding round to grow its platform across Germany. The deal – led by Ortivity’s majority owner Apheon and joined by Unigestion – is subject to regulatory approvals and provides a partial exit for some early shareholders.

Founded in 2022 in collaboration with healthcare entrepreneur Dr. Reinhard Wichels, Ortivity has rapidly acquired and integrated over 100 orthopedic clinics and surgery centers in Bavaria, North Rhine-Westphalia, and Baden-Württemberg. By uniting diagnostics, surgical treatment, and rehabilitation services under one umbrella, Ortivity aims to modernize Germany’s fragmented outpatient care market.

With the hefty new investment and a recently appointed co-CEO (Dr. Michael Thorwarth) at the helm, Ortivity plans to expand into additional regions, enhance its medical service offerings, and solidify its position as a leading tech-enabled healthcare platform in Europe.

Funding Details:

• Startup: Ortivity

• Investors: Apheon (lead), Unigestion

• Amount Raised: €200 million

• Total Raised: Not disclosed

• Funding Stage: Not disclosed

• Funding Date: Sept 3, 2025

Tech Funding Summary Table