50 Best Browser Extensions Companies to Watch in 2026

The most prominent browser extensions companies ranked by global prominence, funding activity, and market position. Showing the top 50 out of 147 companies tracked on Fsome.

147
Total Companies
$486.6M
Total Funding
$3.3M
Avg Funding
San Francisco
Top Location
# Company Location Employees Total Funding Last Round Last Funded
1
Seraphic Security
Seraphic Security is a cyber security startup that provides a robust protection …
Tel Aviv $29.0M Series A 2025-01-30
2
Mozilla
Mozilla provides internet solutions and offers firefox, thunderbird, and raindro…
Mountain View 501 - 1K $2.3M Angel 2005-01-01
3
Kubby
Kubby develops, markets, and operates applications that allow users to shop and …
San Francisco 51 - 100 $4.0M Seed 2025-01-06
4
Guidde
Guidde provides an AI-powered platform for creating and sharing instructional vi…
Belmont 101 - 250 $76.6M Series B 2026-02-25
5
XFA
XFA secures devices by verifying security status at login via browser extension …
Antwerp $1.8M Seed 2025-12-12
6
Kudos
Kudos provides an AI-powered smart wallet service that optimizes consumer reward…
Los Angeles 11 - 50 $20.2M Series Unknown 2025-04-09
7
Cryplex AI
Cryplex AI provides decentralized storage solutions for AI training using unused…
New York 51 - 100 $23.0M Seed 2025-03-15
8
Flow3 Network
Flow3 Network is a decentralized wireless network that lets users earn rewards b…
Solana 11 - 50 $22.0M Pre Seed 2025-03-19
9
Basket
Basket is an AI shopping companion capturing SKU-level intent and powering agent…
London 11 - 50 $7.8M Seed 2023-07-27
10
CatalyzeX
CatalyzeX is an AI code search engine and knowledge-sharing network.
San Francisco 1 - 10 $1.6M Seed 2021-09-22
11
Faircado
Faircado is making sustainable consumption easy, attractive and affordable throu…
Berlin 11 - 50 $3.2M Pre Seed 2024-05-28
12
Hifive
The Greatest GTM Engine That’s Ever Existed. Access 500+ Influential Connectors.…
Austin 1 - 10 $5.5M Seed 2023-09-19
13
Guardio
Guardio is developing tools and products to combat modern web and cloud-based th…
Tel Aviv 101 - 250 $127.0M Series B 2025-11-19
14
JSX Tool
JSX Tool is a browser-based IDE and extension that helps developers to inspect, …
San Francisco 1 - 10 $500K Pre Seed 2025-12-03
15
Yup
Crypto social network that rewards and empowers curators
New York 51 - 100 $3.5M Series Unknown 2024-07-24
16
Directo Tech, Inc - Travel Browser Extension
Free browser extension that helps hotels and property managers get more direct t…
Middletown 1 - 10 $1.0M Pre Seed 2024-06-27
17
Dex
Dex is an artificial intelligence company that provides AI assistance, customize…
San Francisco 1 - 10 $500K Pre Seed 2025-03-12
18
Lumaly
Lumaly is a digital shopping assistant that supports users across their entire s…
Berlin 11 - 50 $1.2M Convertible Note 2023-08-04
19
Arrow AI
Arrow AI provides channel browsing, content sharing, post boosting, SaaS, tools,…
San Francisco 11 - 50 $1.1M Seed 2022-04-06
20
Collabwriting
Collabwriting is a browser extension used to help share, comment, and collaborat…
Belgrade 1 - 10 $1.2M Seed 2024-04-18
21
Nametag
Nametag is a digital collector lens to search the internet for collectors, view …
San Francisco 1 - 10 $2.0M Seed 2022-12-14
22
BlueBean
BlueBean mission is to create a more sustainable business ecosystem by making sm…
Boston 1 - 10 $1.3M Seed 2024-02-28
23
WiseStamp
WiseStamp is the Email signature marketing solution of choice to help Businesses…
Bellevue 51 - 100 Seed 2010-01-01
24
Encarte
Encarte is a browser extension bringing one-click checkout to any e-commerce sto…
San Francisco 1 - 10 $150K Pre Seed 2019-03-18
25
Fluent
Fluent is a chrome extension that helps you learn a new language while you brows…
Vancouver 1 - 10 $1.1M Pre Seed 2021-12-20
26
ZenMate
ZenMate is a software solution that encrypts its users' internet connection to p…
Berlin 11 - 50 $4.1M Equity Crowdfunding 2018-06-13
27
Nook
Nook offers a mobile calendar and collaboration application.
Gatineau 1 - 10 $1.8M Pre Seed 2022-10-26
28
1-CP
1-Click-Procurement™ - Streamlined Purchasing With A Single Click.
Frankfurt 1 - 10 $20K Pre Seed 2025-09-08
29
ShopCo Technologies
ShopCo Technologies is the parent company of the Shop.co universal cart browser …
San Francisco 11 - 50 $9.5M Seed 2017-02-03
30
Threadloom
Product discovery, Shopping, Search, Newsletters
Mountain View 11 - 50 Series A 2018-07-09
31
Optimal Access
A platform for curating access to information and sharing your research online a…
Los Angeles 1 - 10 $250K Pre Seed 2022-06-22
32
OneOneDay
We are building the world’s largest advertising network, co-owned by every ad-vi…
Hong Kong 11 - 50 $2.3M Seed 2019-05-31
33
Trove
Chrome extension that allows you to annotate the internet.
San Francisco 1 - 10 $150K Pre Seed 2020-03-16
34
Uphint
Software that allows companies document any workflow, instantly.
Valencia 1 - 10 $107K Seed 2023-05-30
35
Pocket
Pocket is an application that allows users to save and retrieve documents and vi…
San Francisco 51 - 100 $14.5M Series B 2015-02-27
36
SURF SECURITY
SURF is an enterprise zero-trust browser & extension, creating a secure endpoint…
New York 11 - 50 Seed 2022-11-07
37
Reibase
Reibase develops and offers digital tools that creates incentives on open source…
Brooklyn 1 - 10 Pre Seed 2023-01-09
38
iQ Browser
iQ Browser offers a web browser that enables its users to browse by means of tab…
Valencia 1 - 10 $20.0M Series A 2008-06-01
39
Slice
Slice is developing a browser extension to help online users monetize their brow…
Wilmington 1 - 10 Pre Seed 2022-11-23
40
Cliqz GmbH
Cliqz offers a new way to search the web: direct, fast, and clear. Surf and sear…
Munich, Germany 51 - 100 Undisclosed 2016-08-23
41
Layar
Layar designs and develops mobile augmented reality browsers and interactive pri…
Amsterdam, The Netherlands 11 - 50 $17.1M Series B 2010-11-20
42
Brand Thunder
Brand Thunder is a digital marketing agency that improves online presence for bu…
Dublin, United States 101 - 250 $2.1M Series A 2010-03-01
43
Aspen Cloud
Aspen Cloud is a software company that offers a cloud-based multi-tasking platfo…
Louisville, United States 1 - 10 Seed 2021-03-22
44
Super Agent
Super Agent is a browser extension and web service that will auto-accept cookies…
Porto, Portugal 1 - 10 Seed 2021-01-01
45
Rockmelt
Rockmelt is a social browser-turned social news application.
Mountain View, United States 11 - 50 $39.9M Series B 2011-06-29
46
Maxthon
Maxthon is a global software company developing web browsers that give users a s…
San Francisco 101 - 250 Series Unknown 2006-05-18
47
Amino
Amino is a browser extension that allows to customize any website with CSS.
Moscow 1 - 10 $118K Pre Seed 2014-01-31
48
SurfEasy
SurfEasy is a virtual private network browser security application.
Toronto 11 - 50 Angel 2012-11-01
49
Alorum
Seoslides is an online platform that enables users to build their own SEO-optimi…
Palm Harbor 1 - 10 $200K Seed 2013-08-27
50
PolySuite
PolySuite offers a web browser, visual search engine, and related web tools with…
New York 1 - 10 $20K Seed 2011-04-01