Quick facts:
HQ: Seattle, WA, United States
Funding:
$20M · Equity + debt · May 2026
Top B2B Software Startups in Seattle
This list has 61 startups and was last updated on Oct 15, 2026. 11 of them are hiring right now. Largest teams: Heap, Mason, and Aurelian. Latest round: LevelTen Energy raised $2M (Oct 8, 2026).
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Quick facts:
HQ: Seattle, WA, United States
Funding:
$12M · Equity · Feb 2026
Quick facts:
HQ: Seattle, WA, United States
Incorporated: 2023
Funding:
$4.8M · Equity · Mar 2026
Quick facts:
HQ: Seattle, WA, United States
Incorporated: 2023
Funding:
$3.4M · Equity · Apr 2026
Quick facts:
HQ: Seattle, WA, United States
Incorporated: 2022
Funding:
$3.15M · Equity · Jun 2026
Quick facts:
HQ: Seattle, WA, United States
Funding:
$2M · Equity · Oct 2026
Quick facts:
HQ: Seattle, WA, United States
Incorporated: 2021
Funding:
$1.38M · Equity · Jun 2026
Quick facts:
HQ: Seattle, WA, United States
Funding:
$1M · SAFE · Mar 2026
Quick facts:
HQ: Seattle, WA, United States
Incorporated: 2025
Funding:
$300K · Options · Oct 2026
Shelf Engine
Acquired
What they do:
Transforms how grocery stores buy highly perishable foods.
Quick facts:
HQ: Seattle, WA, United States
Promoted.ai
Acquired
What they do:
Dramatically better search and ads for marketplaces
Quick facts:
HQ: Seattle, WA, United States
Datarank
Acquired
What they do:
Making sense of social data. (Acquired by SimplyMeasured.)
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HQ: Seattle, WA, United States
highlight.io
Acquired
What they do:
The open source, fullstack monitoring platform: stop guessing why…
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HQ: Seattle, WA, United States
Worksphere
Acquired
What they do:
Manage your hybrid workplace
Quick facts:
HQ: Seattle, WA, United States
Tapzilla
Acquired
What they do:
Woot for iOS apps.
Quick facts:
HQ: Seattle, WA, United States
OpenPipe
Acquired
What they do:
Turn expensive prompts into cheap fine-tuned models
Quick facts:
HQ: Seattle, WA, United States
Booktrope
Shut down
What they do:
Booktrope provides a software platform that makes it easy for…
Quick facts:
HQ: Seattle, WA, United States
Parade
Shut down
What they do:
Launch your company without hiring a designer
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HQ: Seattle, WA, United States
LunaSec
Shut down
What they do:
An Open Source dependency security tool that is smarter than the rest
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HQ: Seattle, WA, United States
Nimbus
Shut down
What they do:
Nimbus reduces Datadog costs by more than 60% without Manual Effort
Quick facts:
HQ: Seattle, WA, United States
Jamglue
Shut down
What they do:
Jamglue is an online community allowing users to listen or mix music from a library of user-contributed music.
Quick facts:
HQ: Seattle, WA, United States
Uberduck
Shut down
What they do:
Fast, professional content creation with AI audio, image, and video.
Quick facts:
HQ: Seattle, WA, United States
Cakework
Shut down
What they do:
API that adds cloud hosting to any developer platform
Quick facts:
HQ: Seattle, WA, United States
Preloop
Shut down
What they do:
Translate your experimental scripts into production ML services
Quick facts:
HQ: Seattle, WA, United States
Datamode
Shut down
What they do:
Datamode (datamode.com) is a tool for engineers to instantly diagnose…
Quick facts:
HQ: Seattle, WA, United States