StackAI
Acquired
What they do:
The Enterprise AI Transformation Platform
Quick facts:
HQ: San Francisco, CA, United States
Startups with 51–200 Employees
This list has 538 startups and was last updated on Oct 15, 2026. 182 of them are hiring right now. Biggest hubs: San Francisco (204), New York (63), and London (19). Largest teams: Presto, Onebrief, and Apollo. Latest round: Onebrief raised $151M (Oct 14, 2026).
538 startupsPage 14 of 15
42Floors
Acquired
What they do:
We make it easy to search for office space.
Quick facts:
HQ: San Francisco, CA, United States
SimpleLegal
Acquired
What they do:
Legal Operations for corporate legal teams.
Quick facts:
HQ: Los Angeles, CA, United States
GovPredict
Acquired
What they do:
The system of record for government affairs.
Quick facts:
HQ: Washington, DC, United States
Pachyderm
Acquired
What they do:
Data Versioning, Data Pipelines, and Data Lineage
Quick facts:
HQ: San Francisco, CA, United States
Burrow
Acquired
What they do:
A design brand creating innovative, award winning furniture.
Quick facts:
HQ: New York, NY, United States
Regology
Acquired
What they do:
AI Agents for Regulatory Compliance
Quick facts:
HQ: San Francisco, CA, United States
SafeBase
Acquired
What they do:
Trust Center platform that scales customer security reviews
Quick facts:
HQ: San Francisco, CA, United States
Warmly,
Acquired
What they do:
[Acquired by HubSpot in 2026] Autonomous sales platform to auto-email…
Quick facts:
HQ: San Francisco, CA, United States
VaycayHero
Acquired
What they do:
VaycayHero is a marketplace of professionally managed vacation…
Quick facts:
HQ: San Francisco, CA, United States
DevCycle
Acquired
What they do:
Feature Flag Management Built for Developers
Quick facts:
Bitaccess
Acquired
What they do:
We make bitcoin simple.
Quick facts:
Optery
Acquired
What they do:
Opt out software that removes your private info from the internet
Quick facts:
HQ: San Francisco, CA, United States
Mystery.org
Acquired
What they do:
We help kids stay curious by creating better explanations.
Quick facts:
HQ: San Francisco, CA, United States
SkyLink
Acquired
What they do:
Travel Management Meets AI
Quick facts:
HQ: New York, NY, United States
Spire Health
Acquired
What they do:
Remote patient monitoring for lung disease patients.
Quick facts:
HQ: San Francisco, CA, United States
iCracked
Acquired
What they do:
On-demand smartphone repair in 3 countries and launching smart home…
Quick facts:
HQ: San Francisco, CA, United States
SendHub
Acquired
What they do:
Simple Business SMS. SMBs to Large Enterprise.
Quick facts:
HQ: San Francisco, CA, United States
Tilt
Acquired
What they do:
Mobile crowdfunding: The easiest way to collect, fundraise, and sell…
Quick facts:
HQ: San Francisco, CA, United States
Fond
Acquired
What they do:
Rewards and recognition SaaS for HR leaders
Quick facts:
HQ: San Francisco, CA, United States
Realm
Acquired
What they do:
Better data structures = no DB.
Quick facts:
HQ: San Francisco, CA, United States
Caviar
Acquired
What they do:
Uber for food.
Quick facts:
HQ: San Francisco, CA, United States
Compose
Acquired
What they do:
We make it easy to run databases. PostgreSQL, Redis, MongoDB,…
Quick facts:
HQ: San Francisco, CA, United States
Automatic
Acquired
What they do:
Automatic connects your car to the rest of your digital life.
Quick facts:
HQ: San Francisco, CA, United States
Comprehend
Acquired
What they do:
SaaS to increase speed and quality of clinical trials.
Quick facts:
HQ: San Francisco, CA, United States
Pebble
Acquired
What they do:
Watch that helps you get shit done and limit the mayhem of…
Quick facts:
HQ: San Francisco, CA, United States
Apportable
Acquired
What they do:
iOS porting
Quick facts:
HQ: San Francisco, CA, United States
Mailgun
Acquired
What they do:
Email API service.
Quick facts:
HQ: San Francisco, CA, United States
Hipmunk
Acquired
What they do:
Hipmunk takes the agony out of searching for flights, accommodations,…
Quick facts:
HQ: San Francisco, CA, United States
500Friends
Acquired
What they do:
the best loyalty and retention marketing partner for CMOs.
Quick facts:
HQ: San Francisco, CA, United States
Cloudant
Acquired
What they do:
NoSQL Database-aaS. Acquired by IBM in 2014. Now IBM Cloud Data…
Quick facts:
HQ: Boston, MA, United States
Clustrix
Acquired
What they do:
Clustrix provides the leading scale-out relational database engineered for the cloud or data center. ClustrixDB is a drop-in replacement for MySQL and an…
Quick facts:
HQ: San Francisco, CA, United States
Boosted
Acquired
What they do:
Simple, fun, and fast electric vehicles.
Quick facts:
HQ: San Francisco, CA, United States
Soylent
Acquired
What they do:
Soylent is a simple, nutritious, and affordable food that possesses…
Quick facts:
HQ: Los Angeles, CA, United States
Virool
Acquired
What they do:
Virool provides native video advertising experience for the biggest…
Quick facts:
HQ: San Francisco, CA, United States
Scuba
Acquired
What they do:
Analytics for impatient people.
Quick facts: