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Series B Companies in Washington

Explore 77 series b startups based in Washington, United States. Access verified founder contact information and fundraising data.

Total Companies
77
Total Funding
$979.8M
Avg Funding
$39.2M
Industries
20

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Recently Funded Companies

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Autonomous Vehicles
$59.0M
raised

Lumotive provides optical semiconductor solutions for sensing in various applications.

Feb 2025
Series B

Founder Contacts

30,000+ verified contacts

$28.0M
raised

Brook is a remote patient monitoring and health coaching platform that helps people manage their chronic conditions

Oct 2025
Series B

Founder Contacts

30,000+ verified contacts

Manufacturing
$20.0M
raised

Membrion is a manufacturer of ultra-low cost, high performance ion exchange membranes.

Oct 2025
Series B

Founder Contacts

30,000+ verified contacts

Artificial Intelligence (AI)
$50.0M
raised

Phaidra provides AI and ML solutions to accelerate performance in large-scale industries.

Oct 2025
Series B

Founder Contacts

30,000+ verified contacts

$35.0M
raised

The Lumber Manufactory is a sawmmilling company that offers sustainable manufacturing of dimensional wood products.

Sep 2025
Series B

Founder Contacts

30,000+ verified contacts

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30,000+ verified emails
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Aerospace
$50.0M
raised

Zeno is developing next-generation radioisotope power systems that generate carbon-free, resilient power for decades.

May 2025
Series B

Founder Contacts

30,000+ verified contacts

Artificial Intelligence (AI)
$60.0M
raised

Supio is an accurate and dependable AI that assists attorneys in finding crucial information.

Apr 2025
Series B

Founder Contacts

30,000+ verified contacts

Agriculture
$20.0M
raised

IUNU is an industrial computer vision company that connects plants, facilities, and people through a single interface.

Apr 2025
Series B

Founder Contacts

30,000+ verified contacts

$25.0M
raised

Mast Reforestation is a tech-led reforestation company that provides seedling, project management, and carbon removal credits for forests.

Feb 2025
Series B

Founder Contacts

30,000+ verified contacts

Health Care

Big Bold Health is a platform company providing immune health solutions through nature's wisdom and modern science.

Jan 2025
Series B

Founder Contacts

30,000+ verified contacts

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30,000+ verified emails
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$7.8M
raised

Atomo Coffee is a developer of molecular coffee.

Jan 2025
Series B

Founder Contacts

30,000+ verified contacts

Alternative Protein
$2.4M
raised

Rebellyous Foods is a food manufacturing technology and production company.

Jan 2025
Series B

Founder Contacts

30,000+ verified contacts

Analytics
$50.0M
raised

Read AI is a productivity AI company that enhances workflows with meeting analytics, scheduling, and summaries across messages and email.

Oct 2024
Series B

Founder Contacts

30,000+ verified contacts

Blockchain
$80.0M
raised

Story Protocol is a creator of web3 technology that aims to change the way narrative universes are formed.

Aug 2024
Series B

Founder Contacts

30,000+ verified contacts

Artificial Intelligence (AI)
$60.0M
raised

Protect AI is a cybersecurity company that helps in managing security risks and defending against AI security threats.

Aug 2024
Series B

Founder Contacts

30,000+ verified contacts

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30,000+ verified emails
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Biotechnology
$144.0M
raised

Outpace Bio develops innovative cell therapies to enhance cancer treatment efficacy.

Aug 2024
Series B

Founder Contacts

30,000+ verified contacts

Cloud Data Services
$36.0M
raised

QA Wolf is your modern QA team

Jul 2024
Series B

Founder Contacts

30,000+ verified contacts

Cyber Security
$20.0M
raised

Alethea is a tech company helping Fortune 500 and private companies protect themselves from disinformation and social media manipulation

Apr 2024
Series B

Founder Contacts

30,000+ verified contacts

Delivery Service
$41.5M
raised

Pandion is a provider of a parcel network technology for e-commerce residential delivery.

Mar 2024
Series B

Founder Contacts

30,000+ verified contacts

E-Commerce
$7.9M
raised

FlavorCloud provides a service that integrates directly into shopping carts of retailers, a one-click international checkout experience.

Mar 2024
Series B

Founder Contacts

30,000+ verified contacts

Ready to Reach These Founders?

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30,000+ verified emails
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Biotechnology
$112.0M
raised

ProfoundBio is a developer of targeted therapeutics intended for patients with cancer.

Feb 2024
Series B

Founder Contacts

30,000+ verified contacts

Biotechnology
$4.7M
raised

Proniras focuses on development of a new parenteral medical countermeasure (MCM) to treat seizures and brain injury.

Feb 2024
Series B

Founder Contacts

30,000+ verified contacts

Field Support
$32.0M
raised

Zuper provides field service management solutions, CRM integration, and personalized support for scalable modernization.

Dec 2023
Series B

Founder Contacts

30,000+ verified contacts

Health Care
$18.0M
raised

Optimize Health is a provider of a digital healthcare platform that enables the deployment of Remote Patient Monitoring (RPM) programs.

Sep 2023
Series B

Founder Contacts

30,000+ verified contacts

Data Integration
$16.5M
raised

The Integration Platform for Banks, Credit Unions, Fintechs, and Cores

Sep 2023
Series B

Founder Contacts

30,000+ verified contacts

Showing 26 to 50 of 77 companies

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77 Recently Funded Series B Startups in Washington (August 2026) — Page 2 | VCBacked