September 2025’s Top Startup Events in Boston

Tis the Christmas season for startups! Startup Boston Week is HERE, also known as New England's largest startup gathering. The 9th Annual Startup Boston Week will host bold speakers who are at the forefront of change, and they are here to share their insights with you. Our schedule is packed with various events, whether you have an idea, want to gain traction, or are ready to scale your business.

Additionally, you can even join the crew, which is an excellent opportunity to learn about the startup industry from an organizer's perspective. Register for Startup Boston Week (it's free!) to be connected with New England's largest and most active startup community.

And don't worry, there's even more happening throughout the Greater Boston and New England startup scene this month! Check it out:

September’s Top Startup Events

Time to Gut Check Your Idea: Do I Have a Good Idea for My Startup?

DATE: Tuesday, September 3 from 9:00 AM - 10:00 AM EST

LOCATION: Virtual; Register Here

Before building your product, it’s crucial to ask: Is there truly a market for it? This session with Startup Boston and City of Boston is designed to help first-time founders and aspiring entrepreneurs evaluate whether their startup idea is worth pursuing - and how to take the first steps toward establishing product-market fit. You’ll leave with a more precise roadmap for testing your concept, gathering feedback, and making confident decisions about moving forward.

Coworking Day for Boston's B2B Tech Founders

DATE: Thursday, September 4 from 9:00 AM - 5:00 PM EST

LOCATION: Boston, MA; Register Here

​This event is for B2B tech startup founders seeking a coworking community to call home. There will be waves of arrivals coming throughout the day. Additionally, there will be open mentorship hours for you and your team to gain advice and insights from experts. Lastly, at the CEO Circle, an intimate, founder-only conversation for attendees who want to go deeper on leadership and growth topics.

CEO Peer Group Meeting for Early Stage/SMBs

DATE: Friday, September 5 from 8:30 AM - 10:00 AM EST

LOCATION: Boston, MA; Register Here

​This meeting is for CEOs of tech early-stage and SMBs. The issues you face are unique, and this special group provides you with the opportunity to meet with fellow SMB tech CEOs to share ideas and concerns, to de-risk business decisions to grow your company. ​​Come prepared to ask questions and share advice on the most pressing challenges you are facing as a CEO of an SMB tech company.

Startup Boston Week 2025

DATE: Monday, September 8 to Friday, September 12

LOCATION: Suffolk University, Boston, MA; Register Here

​It is finally here! Startup Boston Week is the largest annual gathering for New England’s startup community — five days of connection, learning, and inspiration for founders, startup operators, investors, students, and the ecosystem builders who support them. Whether you’re launching your first company, scaling to your next milestone, or just curious about the world of startups, you’ll find the people, resources, and ideas to help you take your next step. 

Growth-Stage Startup Leadership Mixer

DATE: Tuesday, September 9 from 5:30 PM - 7:30 PM EST

LOCATION: Boston, MA; Register Here

​Scaling a company from 1 to 200 employees is a whole different game - and you don’t have to play it alone. Join Justworks and Startup Boston during Startup Boston Week 2025 for an exclusive evening of strategic networking, explicitly designed for founders and senior leaders at Boston-area growth-stage companies.

BioSpark 2025 Annual Conference

DATE: Saturday, September 13th from 8:45 AM to 5:45 AM EST

LOCATION: MIT Tang Center, 2 Amherst Street, Cambridge, MA; Register Here

Stubbornly high interest rates and a volatile political landscape are expected to continue exerting pressure on the biopharmaceutical industry in 2025. Yet even amid the turbulence, innovation surges forward. BioSpark 2025 warmly invites attendees to join them for a day of insight, dialogue, and discovery. Together, BioSpark and your company will navigate the waves of turbulence and steer toward opportunity in the evolving biotech and pharmaceutical arena.

Boston Fintech Week

DATE: Tuesday, August 5 from 6:00 PM - 8:00 PM EST

LOCATION: Boston, MA; Register Here

Boston Fintech Week, hosted by FinTech Sandbox, brings its attendees top fintech speakers and the opportunity to make meaningful connections with innovators, regulators, and investors who are building the future of financial services. It is an inclusive conversation amongst thousands of industry leaders and emerging fintechs from around the world. FinTech Sandbox hopes you can meet and explore the newest ideas, the latest advances in technology, and the boldest fintech entrepreneurs.

Nonprofit Leadership Summit

DATE: Thursday, September 25 from 8:30 AM to 3 PM EST

LOCATION: Grappone Conference Center, 70 Constitution Avenue, Concord, NH; Register Here

​The Nonprofit Leadership Summit, the NH Center for Nonprofits' signature event, brings together over 250 nonprofit board and staff leaders, along with corporate and philanthropic partners, to explore trends and issues impacting the sector. There are many breakout sessions you can learn from that will boost your nonprofit: Storytelling for Good: Craft Messages That Move People; Event Fundraising & Mission Moments: Connecting Purpose with Giving; Telling Our Story: Powerful Messaging for the Nonprofit Sector; and much more!

Mass Music and Art Summit

DATE: Saturday, Sept. 27, 11:00 AM to Sunday, Sept. 28, 7:00 PM EST

LOCATION: Aloft Boston Seaport District, 401-403 D St, Boston, MA; Register Here

This high-impact summit brings together New England’s rising talent and national leaders in the music, art, and entertainment industry, creating space for connection, education, and creative elevation. Attendees will gain exclusive insights from top industry professionals, build meaningful relationships, and access the tools they need to thrive in today’s competitive creative economy.

Boston AI Week 2025

DATE: Friday, September 26 to Friday, October 3

LOCATION: Boston, MA; Register Here

Boston AI Week exists to unify our region’s entire AI ecosystem—enterprises, startups, investors, researchers, artists, students, and government—in a shared mission: to make artificial intelligence accessible, impactful, and inclusive for all. Boston AI Week is a platform for building together and moving forward.

Check out our full event calendar right here to stay connected with the Boston startup community. Also, remember to subscribe to our newsletter using the form below for monthly updates!

About the author: Nicholas Ewing is a graduate of UMass Lowell in Business Administration: International Business. He is a practice coordinator at Tufts Medical Center in Framingham. His hobbies include writing stories and going for walks in nature. You can connect with him here.