All Rankings

Top 100 Seattle Startups 2026

The most-funded startups headquartered in Seattle, ranked by total capital raised.

Known total funding for 100 of 100 ranked companies: $13.1B.

Showing top 100 matching companies · Ranked by total funding raised

Use company data through the API.
Example request
curl "https://indexed.vc/api/v1/companies?countries=United+States&cities=Seattle&operatingStatus=active&sort=total_funding_raised&order=desc&limit=100" -H "X-API-Key: YOUR_API_KEY"

The API has no company type filter, so public companies can appear; this list counts private companies only.

The API cannot leave out companies whose latest round is a grant, private equity or debt financing; this list does.

Data from Indexed.vcUpdated

Methodology: up to 100 active companies matching this list's filters are ordered by disclosed total funding in USD. Companies whose latest round is one of: Grant, Private Equity, Debt Financing are excluded. Totals include recorded grants and other qualifying funding, not just equity. Open a company profile for its funding summary and available detail. How this data is built.

26
Tasso

Tasso has created HemoLink, a virtually painless device that allows patients to collect their own...

Seattle, United States51–200Healthcare
Series BTotal funding$133.1MDec 2021
27
LevelTen Energy

A renewable energy transaction platform connecting C&I power buyers to PPAs from utility-scale wi...

Seattle, United States51–200Clean Tech, Climate Tech
Venture RoundTotal funding$127.3MAug 2026
28
Bluesky

Decentralized microblogging social network built on the AT Protocol with customizable feeds and u...

Seattle, United States11–50Social Media
Series BTotal funding$123.0MMar 2026
29
Omnidian

Provides performance assurance and operations for solar and battery storage assets, serving inves...

Seattle, United States201–500Energy Storage, Renewable Energy
Series CTotal funding$120.0MApr 2025
30
Gradial

AI-powered content operations platform that automates enterprise marketing workflows using agenti...

Seattle, United States11–50Artificial Intelligence, Marketing Tech
Series CTotal funding$118.4MJun 2026
31
EcoFlow Tech

EcoFlow is a portable power and energy company founded in 2017 by entrepreneurs from a leading dr...

Seattle, United States1001–5000Clean Energy, Clean Tech
Series BTotal funding$104.0MJun 2021
32
Zeno Power

Develops radioisotope nuclear batteries delivering multi-year power for space missions and subsea...

Seattle, United States51–200Defense Tech, Energy
Series BTotal funding$103.4MMay 2025
33
Mind

Autonomous data security platform unifying data loss prevention, classification, and insider risk...

Seattle, United States11–50Cybersecurity, SaaS
Series BTotal funding$102.0MSep 2026
34
Amperity

Intelligent Customer Data Platform using AI-powered identity resolution to help global consumer b...

Seattle, United States201–500Artificial Intelligence, Data & Analytics
Series DTotal funding$100.0MJul 2021
35
Cajal Neuroscience

Cajal Therapeutics develops small molecule and RNA medicines that restore iron homeostasis for an...

Seattle, United StatesBiotech, Healthcare
Series ATotal funding$96.0MNov 2022
36
Gravitics

Designs and manufactures large space station modules, orbital carriers, and cargo/logistics space...

Seattle, United States11–50Hardware, Transportation
Venture RoundTotal funding$94.9MFeb 2026
37
Bonum Therapeutics

Utilizes allosteric regulation to create targeted, highly active, and less toxic medicines

Seattle, United States11–50Biotech, Drug Discovery
Series ATotal funding$93.0M
38
Lighter

Revenue-based financing platform providing non-dilutive growth capital to technology startups wit...

Seattle, United States11–50Fintech, Lending
Series BTotal funding$89.0MNov 2025
39
Motherduck

MotherDuck builds a serverless cloud analytics service on DuckDB so teams can query data and unde...

Seattle, United States51–200Infrastructure, Developer Tools
Series BTotal funding$87.5MSep 2023
40
Phaidra

Builds AI agents that optimize power, cooling, and workload management for AI data centers to max...

Seattle, United States51–200Artificial Intelligence, Industrials
Series BTotal funding$87.0MOct 2025
41
Supio

Legal AI platform that automates medical record review and drafting for personal injury law firms...

Seattle, United States51–200Artificial Intelligence, Legal Tech
Series BTotal funding$85.0MApr 2025
42
Edge Delta

Provides AI-driven observability and telemetry pipelines for SRE, DevOps, and security teams to d...

Seattle, United States51–200Artificial Intelligence, Data & Analytics
Series BTotal funding$81.0MMay 2022
43
Read AI

AI copilot that transforms meetings, emails, and messages into summaries and insights for enterpr...

Seattle, United States51–200Artificial Intelligence, SaaS
Series BTotal funding$81.0MOct 2024
44
Mozart Therapeutics

Clinical-stage biopharmaceutical company developing disease-modifying therapies that restore heal...

Seattle, United States11–50Biotech
Extension RoundTotal funding$80.0MJun 2023
45
SecureW2

SecureW2 provides next-generation passwordless network security for enterprises, education, healt...

Seattle, United States51–200Cybersecurity, SaaS
Growth EquityTotal funding$80.0MOct 2023
46
Pulumi

Pulumi gives cloud engineering teams the ability to leverage the cloud in all aspects of their so...

Seattle, United States201–500Developer Tools, SaaS
Series CTotal funding$78.5MOct 2023
47
ShareBuilder

Low-cost 401(k) plans for small businesses and solo entrepreneurs.

Seattle, United States11–50Fintech
Venture RoundTotal funding$78.5MNov 2007
48
Possible Finance

Mobile-first fintech offering small-dollar installment loans and a flat-fee credit card to unders...

Seattle, United States51–200Fintech, Lending
Series BTotal funding$77.5MSep 2025
49
Lumen Bioscience, Inc.

R&D company with 3 SBIR/STTR awards from Department of Health and Human Services, Department of A...

Seattle, United States11–50Biotech, Life Sciences
Extension RoundTotal funding$77.0MOct 2025
50
AltPep

Biotech developing disease-modifying treatments and detection tools for amyloid diseases using sy...

Seattle, United States11–50Biotech, Healthcare
Series BTotal funding$76.0MJun 2023